System_348_Seminar_Oct76 System 3 4 8 Seminar Oct76

System_348_Seminar_Oct76 System_348_Seminar_Oct76

User Manual: System_3__4__8_Seminar_Oct76

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General Systems
Division

System/3
Seminar

•

Boca Raton
Field Support

PREFACE

The information contained in this seminar book applies to System/3
(CPU, Features, 1/0 Devices, and Software); it is FOR INTERNAL
USE ONLY.

This seminar manual (no form number) wi II be
available from the following address for a limited
period of time.
Requests for additional copies or comments concerning
this form may be addressed to IBM CORPORATION,
GSD CE Field Support, Department 90E/001-3,
P. 0. Box 1328, Boca Raton, FL 33431. Comments
become the property of IBM.

IBM INTERNAL USE ONLY

The purpose of this seminar manual is to provide the Customer Engineer
with a source of condensed reference material on certain features of the
System/3 product line. The original concept of this seminar was to
provide current technical information on the System/ 3 Model 4 and Model
8. It was expanded to include other features and topics of the System/ 3
line that have not been previously covered by other seminars. It is to
be used as a reference aid in conjunction with other seminar books,
TMD's, FETOM's, etc. to service System/3.
The manual is designed as a loose-leaf binder so that updates, local
procedures, Service Aids, etc. may be added.

IBM INTERNAL USE ONLY
ii

THIS PAGE INTENTIONALLY LEFT BLANK

IBM INTERNAL USE ONLY
iii

TABLE OF CONTENTS

5404

Section
1-1
1-1

Introduction
5404 Processing Unit
5213 Printer, Model 3
5447 Disk Storage and Control
3277 Display Stations

1-2
1-2
1-2

5408

Section 2

2-1
2-1
2-4

Introduction
Devices and Features
Figure of Board Locations
FET Storage
Ma in Storage
Interface
Error Checking
Read Call
Write Cycle

Section 3

Diagnostics
FBI
APLD
APLD

Section 4
4-1
4-3
4-4

3741 Direct Attachment
3741 Introduction
Attachment Assignments
Maintenance and Diagnostics
Procedures for Loading DCP
Alternate Load Devices

Section 5

5448

Section 6

3-1
3-1
3-1
3-1
3-2

5-1
5-3
5-5

5-6
5-7

6-1

5448 Drive
5448 Attachment
5448 Cables & Power
Power on Sequence
5445 to 5448 Disk Map
Pictures

6-2
6-3

6-4
6-5
6-6

IBM INTERNAL USE ONLY
iv

TABLE OF CONTENTS

BSCA
Introduction
TP Support Structure
1200 BPS Integrated Modem Feature
Integrated Communication Adapter
Local Communication Adapter
BSCA Diagnostics
Display Panel
Table of BSCA

Section 7
7-1
7-2
7-3
7-6
7-8
7-11
7-16
7-19

Display Adapter

Section 8

Environmental
Introduction
General Information (ISR Tools)
Sources of Information
ESD Zap Points System/3

Section 9
9-1
9-2
9-14
9-17

Non-IBM
Use of Non-IBM Supplies
Survey Package
Discover Sheet
Sample Letter
Multiple Suppliers System Bulletin

Section 10
10-1
10-2
10-3
10-4
10-5

MES

Section 11
11-3
11-4

Structure of an MES
Sample MES Order
Support Structure
Responsible Plants
Support Structure Flowchart

Section 12
12-4
12-5

Software
System Programming
Disk Errors
CCP
OCL - Operation Control Language
SYSGEN
Service Aid Programs and Their Uses

Section 13

IBM INTERNAL USE ONLY
v

13-1
13-8
13-9

13-10
13-11

13-12

TABLE OF CONTENTS

Software (Continued)
APAR - Authorized Program Anaiysis Report
PTF
Device Counter Logout Program
Glossary
Halt/Sub-Halt Samples
Handbooks

Section 13
13-13
13-17
13-20
13-22
13-33
13-39

Service Aids and RETAINs
RETAIN Induction
5404 RETAINs
5408 RETAINs
Service Aids
CEMs

Section 14
14-1
14-4
14-7
14-10
14-12
15-1
15-1

Miscellaneous
IR's

IBM INTERNAL USE ONLY
vi

THIS PAGE INTENTIONALLY LEFT BLANK

IBM INTERNAL USE ONLY
vii

5404
Introduction
System/3 Model 4 is a disk oriented, cardless system designed for online CRT work station applications. It can control up to five locallyattached work stations (terminals) and an operator's message console.
Communication with remote terminals and other systems is possible via
an optional BSCA (Binary Synchronous Communications Adapter) .

5404 Processing Unit
The processing unit contains 64K of main storage and an operator's
console (keyboard). The CPU is similar to the System/3 Model 6 in
that both use the same instruction set, registers, and general data
flow. Both have similar operator's consoles and many of the 1/0
devices are the same or similar.
Some differences between the 5404 and 5406 are as follows:
o

The 5404 uses FET memory (64K only).

5447 is a machine type not an 1/0 frame.

The disk attachment is housed in the 5447, · not
in the 5404.

CCP (Communication Control Program) available.

The 5404 contains attachment logic for five
work stations and an operator's message display
station (3277) . Three of the six port circuits
are standard with all 5404's; however, the tubes
are an option.

5213 Printer only available as Model 3.

IBM INTERNAL USE ONLY
1-1

5213 Printer, Model 3
Prints 132 characters per I ine at a rate of 115 characters per second.
Bi-directional printing is a standard feature. Same printer as on
System/3 Model 6. Only available printer for 5404.
5447 Disk Storage and Control
5447 is available in two models. Model Al has one drive with one
removable and one fixed disk (same as 5444). Model A2 has two drives;
drive 1 has one removable and one fixed, while drive 2 has two fixed
disks. Each disk on the 5447 holds a maximum of 2,457,600 bytes. To
permit program compatability, drive 2 disks are identified as fixed and
removable disk, although neither is removable. The 5447 supplies the
system table top. (The 5447 is similar to 5406 1/0 frame with 5444's.)
3277 Display Station
Every Model 4 is equipped with three ports as a standard feature. The
first port is always an IBM 3277 Display Station Model 1. This unit is
placed on the table top provided with the 5447 and serves as the
operator's message display unit. Originally the 5404 was designed as a
CCP (Communication Control Program) system only; however, requests
were made to get 5404 without display unit. Thus, the 3277 Display
Unit was made an option, but the attachment which is part of the memory
board is still on all systems.
The two remaining work stations (or optional 3 more) can be any
combination of the following units:
o

3277 Display Station Model 1 or 2
(Keyboard can be attached to each 3277)

3284 Printer Model 1 or 2

3286 Printer Model

3288 Printer Model

or 2

IBM INTERNAL USE ONLY
1-2

5408

Introduction
The System/3 Model 8 is a d~.sk oriented cardless work station with
local and remote teleprocessing capabilities. The system is especially
applicable to (a) on-line work station using 3270's, (b) cardless batch
processing using a magnetic media machine as input, (c) and linked
to a larger central processing system operating in a remote job entry
environment. The work station concept is enhanced through optional
features like the ICA (Integrated Communications Adapter), the BSCA
(Binary Synchronous Communications Adapter), and the 3741 Data
Station with Native Attach.
The CPU itself is System/3 architecture, having the same basic instruction
set, cycle and access time as the System/3 Model 10.
The technology employed is MST-1 and SLD. Storage is FET (Field Effect
Transistors) and has a cycle time of 480 nanoseconds.
Devices and Features
Printers
5203 Model 1 - 100 LPM
5203 Model 2 - 200 LPM
5203 Model 3 - 300 LPM
1403* - 600-1000 LPM Printer attachment same

- 96, 120, 132 Prt. Pos.
- 96, 120, 132 Prt. Pos.
- 96, 120, 132 Prt. Pos.
132 Prt. Pos.
as Model 10.

RPQ

Disk 1/0
5444
5444
5444
5444
5448

Model A 1
Model A2
Models A2 & A3
Two Model A2 's
Model A 1

2. 45
4. 90
7. 35
9. 80
9. 80

megabytes
megabytes
megabytes
megabytes
megabytes

capacity
capacity
capacity
capacity
capacity

All 5444/ 5448 devices employ the high speed access method. The 5444
disk drive and attachment are the same as Model 10. The 5448 disk
drive and attachment are modified 5444 disk drives and attachment.
A minimum of one 5444 A 1 is required.
Printer Keyboard
The system may have a 5471 Printer Keyboard attached. If the 5471 is
not attached, the system must have a 3741 Data Entry Device natively
attached.
IBM INTERNAL USE ONLY
2-1

Storage - FET (Field Effect Transistor)
FET storage with non-destructive read-out and without error checking
and correction. An error in ma in storage will cause a processor check.
Storage

is available in the following sizes:

16K, 32K, 48K and 64K.

Power Supplies
Conventional series regulator type.
Minimum Configuration
5408
5203
5444
5471

- 16K
- any model
- one model A 1
Printer Keyboard or 3741 natively attached.

Optional Features
ICA - Under manual switch control, allows connection of up to three
separate communications interface.
o

Local 1 - 8000 BPS EIA Local modemless attachment
permits loca I attachment of one 3271 Model 1 or 2
control unit, or one 3275 Model 1 or 2 display unit.

Local 2 - 2400 BPS EIA Local modemless attachment
permits local attachment of one binary synchronous
IBM terminal, such as a 3741.

Remote - Medium Speed BSCA, switched or leased
line, data set clocking.

BSCA - Same as System/ 3 Models 6, 10, 15.
feature.

Mutually exclusive with SIOC

SIOC - Same as System/3 Models 6, 10, 15.
feature.

Mutually exclusive with BSCA

Dual programming - same function as System/3 Model 10.
3741 Native Attachment - Key-entry Station used to record data onto a
magnetic diskette.

IBM INTERNAL USE ONLY
2-2

Local Display Adapter - provides direct attachment of terminals.
Mutually exclusive with ICA.
3410/3411 - provides magnetic tape input/output.
with ICA.
5448 - Additional on-line disk storage.

IBM INTERNAL USE ONLY

2-3

Mutually exclusive

.------~~8---~~--....)..i(OlA~.}~--~--A--------1

5203

5444

6sc~

ICA
2

Channel

5471

CPU

DA/3410-3411

Memory

5408
IBM INTERNAL USE ONLY

2-4

or
s\oc\RPO)

FET STORAGE

MOSFET (Metal Oxide Semi-conductor Field Effect Transistor)
MAIN STORAGE
The basic 5408 Main Storage provides the customer with 16K bytes
of data storage and is located on board A-A3. Storage can be
incremented up to 64K in 1GK increments. FET circuitry is used
in the Main Storage. Each FET array card contains SK x 9 bits
of storage. The basic 5404 Main Storage provides the customer
with 64K bytes of data storage and is located on Board A-A3.
A Read Op is not destructive; therefore, it is not followed by a
Write Op. A write cycle is required only when it is desired to
change data in a particular storage location. A Write Op is
a Iways preceded by a Read Op.
INTERFACE
The interface consists of 16 SAR bits, 8 data bits, plus 1 parity
bit (to storage), 3 control signals, 'reset', 'read call/write call',
and 'storage new', and 8 data bits plus 1 parity bit (from storage
to the CPU).
The control card, A-A3T2, provides array card selection, CSX and
CSY decoding, data gating and termination of all input signals.
ERROR CHECKING
Main Storage and the control card do not perform any error
checking or correction (5404/5408). The CPU performs parity
checking during Storage Read or Write cycles.
READ CALL
The control card is initialized by the CPU signal, 'reset'. The
Read Storage cycle is started by the CPU signal, 'Read Call/
Write Call' signals. SAR Hi bits 0, 1, and 2 are decoded to
activate one of eight 'card select' signals. SAR Hi bit 3
is decoded to activate one of two 'CSY' signals. SAR Hi bits
4 and 5 are decoded to activate one of four 'CSX' signals. The
remaining SAR bits are decoded on each of the ARRAY cards.
The read data is stored into the SOR 250 ns after a card select
signal becomes active.

IBM INTERNAL USE ONLY
3-1

WRITE CYCLE
The Write Storage cycle is started by the control card when it
receives the signals 'Read Call/Write Call' and 'Store New' from
the CPU. The operation of the 'Card Se.lect', 'CSY' and 'CSX'
signals is the same as in a Read cycle. CPU data is stored into
the SOR 100 ns after a card select signal becomes active. A
'Write Pulse' is generated 50 ns later to store the SOR data into
the addressed storage location.

IBM INTERNAL USE ONLY
3-2

FB 1 Diagnostic

Introduction
FB1 replaces FF6 Disk Editor used on the System/3 Models
new Editor can be used to conftgttre and customize as well
maintenance for the CE diagnostic pack. The input device
be 3741 diskette, 5471 keyboard, tape cassette or customer
Block 20 of the Diagnostic User's Guide contains operating

6 and 10. The
as program
for the 5408 can
console switches.
instructions for FB 1.

Operation
After FB1 is loaded, instructions for the CE are printed along with an option
menu.
Options are selected using the customer console switches (3-4).
Program prompts and F3 halts enable CE communication with the program
using console switch 4.
Sense Switch 4

- indicates yes.

Sense Switch 4

- indicates no.

Prompts and answers are printed for the CE's records.
Functions
Pack configuration.
Diagnostic pack is shipped with all diagnostics and configured for a minimum
system.
The first function you wi II use is configuration using the console switches as
input.
Through switch options the following configuration functions may be performed:
1.
2.
3.
4.
5.

Complete configuration
CPU storage size and CPU options
Configure U. D. T. only
Add to or modify an existing U. D. T. entry
Configure 48 or 120 chain image

Miscellaneous Functions
List, reproduce, delete are some miscellaneous functions. All operate the
same as FF6, however, selection can be through console switches or 5471
keyboard.
IBM INTERNAL USE ONLY
4-1

Note: A list of all programs should be taken before and after any changes
are made to the pack.
Dup Pack Functions
A complete pack may be duplicated from any disk to any other disk through
selecting options 12 to 43. This function would be used for backing-up the
CE pack before any changes are made to the diagnostic programs.
Input Selection
1.
2.
3.
4.

Option
Option
Option
Option

BB
CC
DD
EE

use
use
use
use

3741 diskette as input (Model 8 only)
5424 MFCU as input (Model 10 only)
5471 keyboard as input
tape cassette as input

Customizing Pack
1.
2.

Option - FF - used to remove al I unused programs.
After initial installation, the CE pack must be customized.

Note: UDT configuration must be correct and tested before pack is customized.
Diskette/Tape Cassette
1.
2.
3.

All diagnostic EC's are shipped on diskettes or tape cassettes.
Diagnostic programs for sales changes are shipped on diskettes
or tape cassette.
Diskette/cassette operation is located in the Users Guide Block
20.

IBM INTERNAL USE ONLY
4-2

APLD

Introduction
1.
2.
3.

Used when disk is down to load disk diagnostics.
Plugs into a jack on the CE Panel.
Block 7 in The Diagnostic Users Guide contains operating
instructions.

Cassette
1.

Tape contains
a.
b.

Tape Loader
DCP
Disk diagnostics

Operation
1.

2.
3.
4.
5.

Fill storage with 1 FE 1 •
Manually enter bootstrap - starting at address 1 005D'.
Turn on CE override switch on 5203.
Program halts in block 7 will direct you for proper
operating procedure.
Block 7 also contains a flow chart showing - halts and
CE action.

IBM INTERNAL USE ONLY

4-3

AAPLD Diskette (5406, 5408, 541 O)

Introduction
A special AAPLD (Alternate Alternate Program Load Device) is available
from Mechanicsburg which provides DCP and 5444 Diagnostic on a 3741
diskette. This special diskette is used in conjunction with a direct
attached 3741 on a System/3 Model 6, 8, or 10.
Providing that the CPU and 3741 attachment are functioning, the AAPLD
will provide a fast, convenient way of getting DCP and 5444 Diagnostics
into storage so that problems with the 5444 can be diagnosed. This is
a free lance tool and has no MAP support.

Parts
P/N 5132740

B/M (2 diskettes, operating instructions, I isting FB4)

P/N 5132739

Operating instructions

P/N 5132738

Diskette

P/N 5132737

Listing FB4

IBM INTERNAL USE ONLY
4-4

PRELIMINARY AAPLD INSTRUCTIONS
1.0

DESCRIPTION
1. 1

The AAPLD (Alternate Alternate Program Load Device)
uses a special diskette in conjunction with a direct
attached 3741 in a System/3 Model 6, 8 or 10. Providing
that the CPU and the 3741 attachment are functioning, the
AAPLD will provide a fast, convenient way of getting DCP
and the 5444 Diagnostics into storage so that problems
with the 5444 can be diagnosed. No map support is
provided, so if there is a channel or CPU problem that
disables the 3741, the tape cassette (APLD) must be used
instead.

1. 2

The programs written on the diskette are a special 3741
loader, DCP and all 5444 Diagnostics.

1 .3

The DCP is configured as follows:
CPU
D,2000
UDT
Fl, EO, A0-2
For use on a Model 6, the CPU and UDT records must be
modified. For use on a Model 1O without high speed files,
the UDT card must be changed. See Section 5.

2.0

INSTRUCTIONS FOR USE
2. 1

Manually insert the following 29 byte bootstrap in storage
starting at Address 0100:
ADDRESS
0100
0104
0107
010A
010D
0110
0113
0116
01 lA
011C

DATA
C2
81
81
F3
B1
F3
E1

02
41
42
43
44
41
42
co 87
40 00
7F

0100
1B
1C
08
19
00
13
OOOE

2.2

Insert the AAPLD diskette in the 3741.

2 .3

Depress 'FUNCT SEL' lower and 'RET TO INDEX'.
is not necessary if you are already at the index.

2 .4

Depress and hold 'NUM SHIFT' while entering '41 '.
IBM INTERNAL USE ONLY
4-5

This step

3.0

2. 5

Depress 'FUNCT SEL' upper and then depress 'OUTPUT FROM
3741 '. Wait while the diskette advances to and displays the
1st record of the special loader. Since this loader is hex
data, most characters displayed are unrecognizable.

2. 6

Make the printer ready, if necessary.

2. 7

Set CPU SAR to 0100. Then depress 'ST ART' on the CPU.
The loader and DCP will be loaded and the normal DCP
printout and HA Halt will occur.

2 .8

Reset the HA Halt and Program A01 will load and a second
HA Halt will occur. From this point on, the system looks
similar to a card system except that the cards are written
on the diskette. To rerun a program, system reset and
depress start. Resetting the HE Halt at program termination
wi II cause the next program to be loaded.

2.9

When the last record on the diskette has been read, an HS
Halt will occur indicating there is no more data. (BCD 1345
on Model 6)

2. 10

The bootstrap wi II remain at Address 0100 so that loading of
DCP can be repeated at any time by returning to Step 2. 2.

DISKETTE ORGANIZATION
3. 1

The front of the AAPLD diskette contains the special loader
and DCP. After DCP, the following disk diagnostics are
written in the following order and locations:
PROGRAM ID

LOCATION (TRACK & SECTOR)

A01
A03
AOS
A06
A07
A08
A09
AOA
AOB
AOC
AOD
AOE
B01
B03
B04
BOB

04015
08008
12002
15013
18022
22002
25012
28011
31021
35003
38011
40019
43011
46010
47015
52001

IBM INTERNAL USE ONLY

4-6

4.0

SELECTING PROGRAMS OUT OF SEQUENCE
4. 1

5. 0

Once DCP is loaded, any program on the diskette may be
selected as follows:
A.

If the 3741 is in Read Mode, reset it by holding both
shift keys depressed at the same time and then
depressing Reset.

Now depress 'FUNCT SEL 1 lower and then 'SEARCH ADDRESS'.

Key in the track and sector location of the program (see
Section 3) in positions 1-5.

Depress 'REC ADV'.

The header record for the desired program should be
displayed. If it is not, you should be able to 'REC ADV'
or 'REC BKSP' to find it in case some minor changes have
been made to the diskette.

With the header record for the desired program displayed,
depress 'NUMERIC SHIFT' and enter '41 '. Then depress
'FUNCT SEL' upper and 'OUTPUT FROM 3741'.

The desired program is now ready to be read when the
HE Halt is reset.

MODIFYING CPU & UDT RECORDS
5. 1

When running on a Model 6, it will be necessary to modify
the CPU and UDT records. This is easily done as follows:
A.

Depress 'FUNCT SEL 1 lower and then 'UPDATE'.

Depress 'FUNCT SEL' lower and then 'SEARCH CONTENT'.

Key in 'CPU 1 in position 1-3.

Depress 'REC ADV'.

When the CPU record is found, it wi II be displayed.

Change the record to:

Depress 'REC ADV'.

The UDT record wi II soon be displayed.
UDT Fl ES, AO.

CPU B, 2000

IBM INTERNAL USE ONLY
4-7

Change it to:

5.2

6.0

Depress 'REC ADV'.

Verify that both records have the correct information
in them by depressing 'REC BKSP' to display their
contents.

Depress 'FUNCT SEL' lower and then 'RETURN TO INDEX'.

Diskette is now configured.

When running on a Model 10 without high speed files, it is
necessary to change only the UDT card. See Section 5. 1 for
the procedure. However, in Step C, Key in 'UDT' and then
skip to Step G. In Step H, change UDT record to: lJDT F 1,
EO, AO.

PRECAUTIONS AND COMMENTS
6. 1

Always be sure you have the AAPLD diskette in the 3741 before
trying to run the bootstrap at Address 0100. Failure to do
this can destroy the bootstrap at Address 0100.

6. 2

If the 3741 appears to be hung up and not taking commands
properly from the keys, try resetting it by depressing and
holding both shift keys and then depressing 'RESET'. If all
else fai Is, open the diskette cover and reclose it. NOTE: If
reading in programs, it will be necessary to manually reselect
the desired program (Section 4) and get the 3741 back into
Read Mode.

6. 3

Once Program 803 (IPL Test) has been loaded, it must be
executed! If you try to terminate it early, it may disturb
the low order 256 bytes of storage and cause a 'PROC CHECK'
when trying to load the next program. It is then necessary
to re-enter the bootstrap and reload DCP.

IBM INTERNAL USE ONLY

4-8

3741 DIRECT ATTACHMENT

3741 Introduction
The 3741 Data Station is a single-operator, key-entry station used to
record data onto a magnetic disk (diskette) .
System/3 Models 6, 8, 10 (disk 12 and 15) use the 3741 data station
natively attached to the 1/0 channel as an on-line magnetic diskette
reader-writer. Data transfer is serial by byte, one byte at a time
(EBCDIC) with a maximum 128 bytes transferred to or from the 3741.
All data is parity checked on the channel and at the 3741 attachment
interface.
The IBM 3741 can be used in the following ways:
1.
2.
3.

As an off-Ii ne data entry device.
As an on-line input/output device attached directly
to the CPU.
As a terminal device in a communications environment.

There are four models of the 3741:
Model 1 is a single data-entry station with a 240 character
CRT display. Its record size is from 1 to 128 characters.
Model 2 has the functional characteristics as Model 1, but
also includes a BSCA (binary synchronous communications
adapter) .
Model 3 executes programs written in the ACL (Application
Control Language), and can optionally create object programs
from source programs. When not under ACL program control,
Model 3 can operate with the same characteri sties of the
Model 1.
Model 4 is the same as the Model 3, plus BSCA capabilities
of the Model 2.
One optional feature of the IBM 3741 is a second disk drive and keyboard
that allows merging, copying, and pooling of records when the 3741 is
off-line. When directly attached to System/3, the two diskettes are not
separately addressable. Rather, they are used to simplify on-I ine operation
when handling large quantities of data. When reading data into System/3,
for example, control can automatically be switched between the first and
second diskettes to provide a continuous input of data.

IBM INTERNAL USE ONLY
5-1

Rated speeds for all models are listed below, but no effort is made to
Iimit transfer to these rates.
Read
Write

1500 Records per minute
1000 Records per minute

Physical attachment is via a 50
two lengths, 20 ft. and 40 ft.
pin connectors. The 3741 end
cards. This cable comes with
a specify code .

twisted pair shielded cable available in
The cable is connected through two 48
of the cable plu9s into two SLT paddle
the 3741 as part of the ship group via

Cabling from the system connectors to the board is via four flat ribbon
cables. These cables provide all interface signal lines between the
attachment and the 3741.
The attachment is available in two versions, IPL and Non-IPL. The IPL
version consists of 11 cards (7 logic and 4 convert cards). The non-IPL
version has 10 cards (6 logic and 4 convert cards). Both attachments
are basically a modified SIOC attachment; each version has its own unique
board part number. The version used and its location in the system vary
between models as described below:
Model 15 IPL version only (IPL capability can be activated on the B & C
models only.) on Gate B Board A4 Channel bank 3 is a prerequisite.
Model 12 (A) cardless - IPL version on Gate A board A3, (B) with card
1/0 - IPL version on Gate B, board A4. Channel bank 3 is a
prerequisite.
Model 10 - Non-IPL version only on gate B, board A4.
is a prerequisite.

Channel bank 3

Model 8 - Non-IPL version only on gate A, board A3. Located on channel
bank 1 the attachment shares the board with memory. This board
is prewired, and the 3741 feature is added by inserting the cards
into the board. (NOTE: Card locations on this board are different
from the standard board used on all other models.)
Model 6 - Non-I PL version only.

Gate B, board A 1, exclusive with SI OC.

Board P/N w/o IPL - 5554836
Board P /N with IPL - 5554842
On the Mod 8 3741 DA CKT is located in the memory board.

IBM INTERNAL USE ONLY
5-2

ATTACHMENT ASSIGNMENTS
Device Address

= 0.

(A)

The System/3 device address for 3741 is '4', M Bit

(B)

The 3741 address for System/3 is also '4' (address bit 5
active) . However, the system only uses this address to
identify that the 3741 is ready and not busy. Only
address Bit 5 is sensed for this purpose. Consequently
any address from the 3741 with address bit 5 active wi 11
make the device appear active to the system. If it is
necessary to determine which device is really attached,
this can be done by sensing the 1/0 transfer lines.
Four of these lines contain the device address (in this
case '4') which is hard wired in the connector.

The cycle steal priority used is 16 (priority clock 0, bit line 3).
Assignment code is DBO Bits 2 and 3 at clock 8.
LSR's - one LSR, the DSAR (Data Station Address Register) has been
assigned to the attachment. It is selected by raising LSR select line
4 and 5 on all models of System/3.
Interrupt level 5 (DBI bit 5 during interrupt poll). This interrupt is
used on the Model 15 to signal not only 'op-end', but also that the 3741
has come ready or has some other status which requires attention.
Cable Outlet
The following cable outlet hole in the system will be used by the 3741:
Model
Model
Model
Model
Model

15-0IC-B 1
12-0IC-B 1
10-0IC-Fl (shares hole with SIOC).
8-Same place as the data recorder on the Model 6.
6-ln place of the SIOC

Power
Power for the 3741 is supplied by the existing power supplies in the 3741.
No power is supplied to the 3741 by the System/3.
Power for the attachment is supplied by System/3. No special supplies or
power increments are required to be added to the system.

IBM INTERNAL USE ONLY
5-3

The 3741 attachment requires +6 volts and -4 volts. Tolerances and
variations are the same as for other MST logics within the system.
(No emergency power off capability exists between the system and
the 3741.)
On-Line Selection
The 3741 is placed on-line by insuring it is powered on and by performing
a designated function select on the 3741 keyboard. Off-line selection is
also accomplished at the 3741 keyboard. (Off-line is the normal power up
state of the 3741.)
The 3741 keyboard is locked out, except for the function select options,
while on line. If the operator selects 'off-I ine' while the system is using
the 3741, the program wi II detect this and halt.
Indicators
There are no indicators for the 3741.
halt code.

Device identification is via the

Functional Description
As mentioned earlier, the 3741 attachment is a modified SIOC attachment.
Not all functions available in this attachment (adapter) are used by the
3741.
The major changes made to the SIOC to form the 3741 adapter are:
End of transmission can cause an interrupt without the
attachment being in the read or write state.
End of transmission will generate one pulse per transition.
This pulse is approximately 3 microseconds long and coincides
with the leading edge of the EOT input signal. The duration
of the EQT input signal is immaterial, but must be longer than
6 microseconds.
The cycle steal timing has been changed.
The interrupt level is now 5 (used on Mod 15 only).
The device address is different.
The capability to directly test the ready/not busy status of
the box has been included.

IBM INTERNAL USE ONLY
5-4

No EPO capability exists.
The indicator I ight has been removed.
An IPL capability has been added on attachments with board
P /N 5554842 (Model 12/ 15 only) .
Other minor changes to adapt to the 3741 1/0 adapter method
of operation.
The System/3 3741 adapter serves as a buffer storage and control unit
between the attached 1/0 device and the CPU 1/0 channel. Data transfer
between the adapter and the 3741 occurs on a request and acknowledgment
(asynchronous) basis and between the adapter and the CPU storage by
means of 'cycle steal' through the 1/0 channel. A single byte of data
(8 bits plus parity) is transferred on each cycle. Depending on the nature
of the attached 1/0 device, data can be 'READ' from the device and placed
into core storage or data can be 'WRITTEN' into the device from storage.
The read or the write mode of the attachment is program selectable. The
3741 must be placed in the corresponding mode.
In addition to data transfer, sixteen program selectable control lines (1/0
select lines) are provided between the adapter and the 3741 box for the
purpose of controlling various 1/0 device functions. Eleven program
testable status lines (1/0 transfer lines) are also included to permit
program testing of various 3741 conditions.
MAINTENANCE AND DIAGNOSTICS
Mai ntena nee
Maintenance of the 3741 attachment is performed in the following manner:
The customer takes the 3741 off-I ine to determine if it operates
properly. If it does not, the 3741 is failing and the 3741 has to
be serviced.
If the System/ 3 Model 8 attachment is failing, diagnostic programs,
map charts, and CE aids are used to isolate the problem.
A 'WRAP' test capability has been incorporated into the attachment design.
This is accomplished by a shorting connector which is shipped with each
system. This connector is used to 'wrap' the VTL level interface signals
at the tailgate connectors. The wrap connector can also be used to wrap
the interface cable back to the 3741 to assist in diagnosing.
No preventive maintenance is required on the 3741 attachment.

IBM INTERNAL USE ONLY
5-5

Diagnostics available for the 3741 direct attach are as follows:
401

Diagnostic function test no diagnostic connector.

402

Attachment function test with diagnostic connector.

403

Test 3741 functions of a data byte transfer - with diagnostic
connector.

404

3741 function test.

40F

System Test Exerciser.

ERAP
Refer to block 40 of Diagnostic Users Guide for complete details.
Procedures For Loading and Running Diagnostics from
3741 with Channel Terminate Feature
Diagnostic Control Program (Block 10)
To configure diskette DCP:
Insert diskette #1 (P/N 1607738) in 3741
Press LWR 'funct sel' and 'search content'
Type an asterisk * in col. 1.
Press 'Record Advance'
When record is found, 'Rec BKSP' to desired record (CPU, UDT,
11 CHAN, IMAGE, MISC). Define system as described for cards.
'Rec Adv' enters data displayed on screen.
Diagnostic Programs available on diskette are as follows:
1 for 1 - The data previously contained on one 96 column card appears on
one diskette record using standard EBCDIC.
PROCEDURES FOR LOADING DCP
First insert the diskette, put 3741 on-line, and output mode, type 11 41 11 ,
press upper "Function Select", and "Output from 3741 11 (dup key). This
procedure will prepare the 3741 to start reading when the "Program Load
Key" on the CPU is pressed.
After DCP is loaded, continue hitting "Record Advance" until the desired
program is displayed on the screen. Then put the 3741 on line and in
output mode (Type 11 41", upper "Function Select" and "Output from 3741 11 ,
dup key).

IBM INTERNAL USE ONLY
5-6

In order to use diskettes instead of cards for the diagnostic programs, the
diagnostics have been grouped on the diskettes in the order the maps call
out to run then. This is convenient to use and faster than with cards.
The following shows the method of grouping.
Diskette 1

P/N 1607738
Map Entry Diskette
Contents: ODO-FFB-FFF-FDG-143
FCO,DD6,D44, FC2, DD9, C17-FAO, FAG, FA7.

Diskette 2

P/N 1607739
Stand Alone Diskette
Contents: LDR-FCO, LDS-FAO,EoA

Diskette 3

P/N 1607740
3340 Micro Diagnostic Diskette
Contents: Cl 6-FA 1-FA2-FA3-FA4-FA5.

Diskette 4

P/N 1607741
3340 Diagnostic Diskette
Contents: Cl 1, C12, Cl 4, C 15, C 17-FAO
C18, C19, ClA, ClB, ClF.

ALTERNATE LOAD DEVICES
Cassette
5404
5408
5410
5412
5415A
5415 B&C

x
x
x
x

2560

5424

x
x
x
x

x
x

IBM INTERNAL USE ONLY
5-7

1442

x
x
x
x

3741

x
x
x

THIS PAGE INTENTIONALLY LEFT BLANK

IBM INTERNAL USE ONLY
5-8

5448

5448 DRIVE
The 5448 Disk Storage Drive (Model A 1) provides 9. 8 MB of additional on line
storage for system 3 Model 8/ 1O. The 5448 is a stand-alone box that contains
two disk drives and a 24 volt power supply which supplies both the +24 volt
and the +6 volt power for the drives. All other voltages and control signals
are supplied by the host system. The two disk drives are modified 5444 (same
as lower drive on 5447). The basic differences between a 5448 drive and a
standard 5444 are as follows:
o

Two disk drives each with two fixed disks attached to
a common spindle (no removable disk) .

High speed access only.

Only one model available (9. 8 MB).

No cleaning brushes (ready in 10 seconds) .

No indicator Iights (depends on host system to
relay status to the operator) .

Drives have no disk or drawer interlocks (Drives
not accessible to the customer) .

IBM INTERNAL USE ONLY

6-1

5448 ATTACHMENT
The 5448 FCU (File Control Unit) is a 5444 Board with wiring
modifications plus three reworked cards (P2, Q2, S2) . These cards
have been modified due to 5448 not being IPL'able; however, there
are still non used IPL and cartridge lines in the circuit which, if
not at proper level, could cause a failure. These lines are still
shown in ALD's to assist in problem determination. Since most cards
in 5448 FCU are identical to 5444 FCU, card swapping can be used for
problem determination.
The FCU is the interface between the 5448 and the CPU, which provides
a way for the 5448 to use the faci Iities of the CPU to communicate with
main storage. The 5448 File Attachment is located within the CPU
(01B-A1 Board in 5408, 01B-B1 in 5410). This means that the 5448
Attachment is mutually exclusive with SIOC (Serial Input/Output Channel)
on the Model 8 and the 5445 Disk Drive on the Model 10.

5408/5410
CPU

-,.

5448
Attachment
(FCU)

5448
Upper Drive

..!Ii..,,.

5448
Lower Drive

Each disk drive has a separate interface, which may be selected by the
host system. The customer programs consider each 5448 spindle as a 5445.
The 'Q' codes for the 5448 are CO for spindle 0 and DO for spindle 1. The
address conversion is done by the SCP (System Control Program) . Each
of these simulated 5445's are equal to one quarter the capacity of a 5445
(approximately 5 MB) .

IBM INTERNAL USE ONLY

6-2

5448 CABLES & POWER
The 5448 attaches to the system via 2 cables. The signal cable is a shielded 50
connector twisted pair cable with 4 coxial lines attached to the cable. The other
cable is AC/DC power lines. These cables connect from front of 5448 thru 5203
to front of 5410 (route of 3410/3411) or back door of 5408 (route of SIOC).
The AC power, supplied by host system, is distributed to the disk drives and the
24 volt supply. There are three power switches on the 5448.

Power
On

Off

File 1
On

File 2
On

Off

Power Control Switches
o

IPO (Immediate Power Off) - Removes all AC power from the 5448.

Start/Stop Fi le 1. Off position removes the control voltages and
the AC voltages from the upper drawer. Turning on switch, a
POR (Power on Reset) occurs and control voltages and AC voltages
are restored to drawers

Start/Stop Fi le 2. Off position removes the control voltages and
the AC voltages from the lower drawer. Turning on switch, a
POR occurs and control voltages and AC voltages are restored to
drawer.

The host system provides the -4 volts and -30 volts to the 5448. The +6 volts is
supplied by a regulator in the 5448. When -4 and -30 voltages are present and
stable, the system must send a signal, "5448 power complete", to the 5448. The
11
5448 power complete" signal allows Kl relay to pick which places 24 volts on the
disk drives completing the power up sequence. In emergency power down situations,
K3 (AC power) is dropped, which removes 24 volts from the drives. This is done
to remove 24 volts before +6 volts and -4 volts to protect data present on the disk
drives. If 24 volts is present after the +6 volts and -4 volts are removed, write
current will be present and data would be written over.

IBM INTERNAL USE ONLY
6-3

Power on Sequence

Insure Start/Stop File 1, File 2 and IPO switches are on.

Switch on host system power.

AC applied to 5448

+6 volt ready

5448 power complete signal

+24 volts applied to drives

Power Off Sequence

Just the reverse of Power On Sequence.

IBM INTERNAL USE ONLY

6-4

S44S DISK MAP
LOCATION

CONTENT

Cyl 0 Track
Track 2
Track 3
Track 4

Cyl
Cyl
Cyl
Cyl

Cyl 1-3

0
0
0
0

S444
Head
S444
Head

Format
0 S44S
Format
1 S44S

(sectors 99 thru SC)
(20 sectors) (4 sectors reserved)
(sectors 00 thru SC)
Format (20 sectors) (4 sectors rese.rved)

ALTERNATE TRACKS & LOG

Cyl 4 Track
Track 2
Track 3
Track 4

Head 0 (20 sectors)
Cyl
Cyl
Head
( 16 sectors)
Cyl 1 Head 2 ( 12 sectors)
Cyl 1 Head 3 (4 sectors)

Cyl
Cyl
Cyl
Cyl

Head
Head
Head
Head

1
2
3
4

( 4 sectors)
(8 sectors)
(12 sectors)
( 16 sectors)

Cyl S Track
Track 2

Cyl 1 Head 4 (4 sectors) Cyl
Cyl 1 Head 6 (20 sectors)

Head

(20 sectors)

NOTE:

Cyl 203

Track
Track 2
Track 3
Track 4

Cyl
Cyl
Cyl
Cyl

48
48
48
48

Six 544S tracks a re mapped on five 5448
tracks. Mapping is continuous thru the
data area.
Head
Head
Head
Head

10 ( 12 sectors)
4 ( 8 sectors)
12 ( 4 sectors)
14 (20 sectors)

Cyl 48 Head 11 ( 12 sectors)
Cyl 48 Head 12 (16 sectors)
Cyl 48 Head 13 (20 sectors)
(4 sectors reserved)

To convert from S445 C/H/R to 5448 C/S:
400 C* + 20 H** + R* - 16
96

= CYLINDER*

Remainder

= Sector*

To convert from. 5448 C/S to 5445 C/H /R~
96 C* + S* + 16
400

= CYLINDER*

REMAINDER
20

= HEAD**

*A Decimal non-zero number
**A Decimal number from 0 thru 19

IBM INTERNAL USE ONLY
6-5

Remainder

= Record*

cylinders 1, 2, 3
alternate tracks
CO (Disk Q-Code)
Unit Dl

CB (Disk Q-Code)

DO (Disk Q-Code)
Unit D2
D8 (Disk Q-Code)

Track 1

•

'
;

Track

cylin'der

PHYSICAL

5448
BYTES PER SECTOR
SECTORS PER TRACK
BYTES PER TRACK
TRACKS PER CYLINDER
SECTORS PER CYLINDER
BYTES PER CYLINDER
CYLINDERS PER UNIT
MAXIMUM NUMBER OF FILES
PER UNIT
MAXIMUM NUMBER OF TRACKS
PER UNIT
NUMBER OF UNITS

256
24
6144
4
96
24576
200

5445
256
20
5120
20
400
102240
47 3/4

800
2

955

IBM INTERNAL USE ONLY

6-6

LOGICAL

DL Drive (2 fixed disk)

IBM INTERNAL USE ONLY

6-7

IBM INTERNAL USE ONLY

6-8

TP SUPPORT STRUCTURE

Account
CE

CE should run in-house diagnostics (801 /881 - 806/886),
run 809 to Raleigh TPTC, run 809/80A or 871/872 with
attaching BSC device. If all available diagnostics run
or on-line test fail, call TP BODS.

,,
TP
BODS
1-

TP
RDS

He has trap available to record and analyze line traffic.
He may not be System/3 trained, but is trained on
network problem determination.

He has data scope available to record and analyze line
traffic. He can have TP BODS transmit trap recording
to his data scope for remote ana lyzation. Like the TP
BODS, he may not be System/3 trained, but has had
in-depth training on network problem determination.

Boca Raton
Field Suppor~

Final level of support in resolving System/3 TP network
problems.

IBM INTERNAL USE ONLY
7-1

1200 BPS INTEGRATED MODEM FEATURE (MINl-12)
INTRODUCTION
Purpose
The 1200 BPS Integrated Modem Feature will provide 1200 BPS communication
ca pa bi Iity between System/ 3 and the telephone interface Iine connection.
General Description
The 1200 BPS Integrated Modem is being implemented in two versions.
The first version is a leased I ine configuration. This will provide a 1200
BPS, point-to-point non-switched or multipoint communication link. Both
2-wire and 4-wire options are available.
The second version is a switched network configuration. This will provide
a 1200 BPS, auto-answer, point-to-point switched network communication
link.
Both versions wi II interface to the BSCA-1 and/or BSCA-2 via the standard
EIA data set interface (RS-232/CCITT V24) . Available on 5408, 5410, 5412, 5415.
HARDWARE DESCRIPTION
Physical Requirements
The 1200 BPS Integrated Modem is housed in the BSCA-1 and/or the BSCA-2
boards on the System/ 3. Two new versions wi II be added to the BSCA
boards. Note: Not available on BSCA-2 on 5408.
Leased line version -- This point-to-point non-switched version will utilize
the basic transmit, receive and wrap cards. The wrap card is a 1 wide
2 high card plugged into location 01BA2D4 (BSCA-1) and/or 01 BA3D4
(BSCA-2) . The receive card is a 2 wide 2 high card plugged into location
01BA2E4 (BSCA-1) and/or 01BA3E4 (BSCA-2). The transmit card is a 2
wide 2 high card plugged into location 01 BA2F4 (BSCA-1) or 01 BA3F4
(BSCA-2).

IBM INTERNAL USE ONLY

7-2

Switched network version -- This auto-answer point-to-point switched
network version wi II use the same basic cards used by the leased line
version plus the two auto-answer cards. One auto-answer card is a 2
wide 2 high card that plugs into location 01 BA2G4 (BSCA-1) and/or
01 BA3G4 (BSCA-2) . The other auto-answer card is 1 wide 2 high card
plugged into 01BA2H4 (BSCA-1) and/or 01BA3H4 (BSCA-2).
BSCA Requ i rem en ts
Both versions of 1200 BPS Integrated Modem require BSCA features medium
speed in internal clock at 1200 BPS. The leased line version requires
BSCA network selection feature point-to-point non-switched. The switched
network version requires BSCA network selection feature point-to-point
switched.
Cable Requirements
Both versions of the 1200 BPS Integrated Modem (switched network and
leased line) will use the same cable from the BSCA board to the enter/
exit tailgate on both BSCA's.
Leased line version will utilize an x-length cable of 2 twisted pairs
terminated with a 4 prong telephone plug on the line end. The other
end will have a 14 pin amp connector to mate with the internal cable
at the enter/exit tailgate. This cable is used by both BSCA's.
Switched network auto-answer will use an x-length cable consisting of
8 conductors with ring terminals on the line end for connection to CBS
Automatic Data Coupler. The other end wi II have a 14 pin amp
connector to mate with the internal cable at the enter/exit tailgate.
This cable is used by both BSCA's. Both external cables are x-length,
maximum of 30 feet.
Power Requirements
The standard medium speed -12 Volt power supply is replaced by a
larger + or -12 Volt power supply. This will supply the + and -12
volts required by the 1200 BPS Integrated Modem Feature.
Remote Data Terminal Equipment Requirements
BSC devices on the 1200 BPS Integrated Modem Feature teleprocessing
line must also have a Mini-12 attachment of the same configuration.

IBM INTERNAL USE ONLY
7-3

PROGRAMMING CONSIDERATIONS
All existing programming support for BSCA-1 and BSCA-2 on System/3
Models 8, 10, 12 and 15 can be used with the 1200 BPS Integrated Modem
Feature.
Switches
When the 1200 BPS Integrated Modem Feature is installed on BSCA-2, a
local test switch is installed for BSCA-2 to put its 1200 BPS Modem Feature
in wrap mode when used.
Diagnostics
The additional maintainability requirements for this BSCA feature involves
only the dedicated diagnostic program support. A loop test capability
will be provided by the modem wrap feature which can be utilized by
BSCA diagnostics and MAPS. A console switch (local test) will be used
to place the Mini-12 BPS Integrated Modem feature in loop test mode.

IBM INTERNAL USE ONLY

7-4

ICA (INTEGRATED COMMUNICATION ADAPTER)

Purpose
1.

The ICA will provide three different communication adapters in one
attachment, one remote and two loca I. The loca I attachment wi II
allow the 3741-2 and/or the 3271/3275 to attach directly to the
System/ 3. The remote communication adapter wi II al low, via data
sets and telephone lines, a data link to any device presently
supported on the System/ 3 BSCA.

ICA is available on System/3 Model 8 or 12 as a feature and on
the Model 4 as an RPQ.

General Description
. The ICA feature is a type of communications adapter, similar to BSCA
on System/ 3. There is a switch on the console that selects one of the
data links:
(1) Remote, medium speed, (2) Local 1, and (3) Local 2.
Any combination of the data links can be installed on the medium speed
ICA feature, but only one may be active at a time.
Remote
This feature provides one medium speed binary synchronous line interface
to an external modem.
1.
2.
3.
4.
5.

Attached modem must provide clocking
Switched or leased line
Medium speed - 600 BPS to 7200 BPS
Half duplex only
EBCDIC or ASCII code

Local
Data transfer rate is 8000 BPS. This feature permits local attachment,
without the use of a modem or communications line, a BSC device; for
example, 3271 or 3275.
Local 2
Data transfer rate is 2400 BPS. This feature permits local attachment,
without the use of a modem or communications line, a BSC device; for
example, 37 41.
IBM INTERNAL USE ONLY
7-5

HARDWARE DESCRIPTION
Physical Requirements
ICA occupies board location 01A-A2 (5408), 01 B-A3 (5412) . ICA is on
channel Bank 1 (5408) and channel Bank 3 {5412) and uses the interrupt
features. If more than one data link interface is required, a switch on
the console wi II be used to select the different interfaces.
Cable Requirements
ICA can use up to 3 1/0 cables, one standard System/3 medium speed
data set cable and 2 Local modemless attachment cables.
Attaching Device Requirements
Devices attaching to one of the local attachments must have a BSCA feature
with a point-to-point non-switched network and a standard EIA data set
interface.
MAINTENANCE AND DIAGNOSTICS
The proper operation of ICA can be verified by running the BSCA wrap
diagnostic to the end of the signal cable and back. This can be performed
to verify each of the three medium speed interfaces.
Diagnostics
The same diagnostics used for the BSCA-2 on System/3 will be used for
ICA since the M bit of the Q code is always a 1 for ICA. Check UDT configuration
chart (User Guide block 19) and use sense switch lA where needed.
WORLD TRADE CONSIDERATIONS
The ICA feature operates at fixed bit rates; therefore, the rate select feature is
not a Ilowed.
All display panels for ICA for the different language groups are covered.

IBM INTERNAL USE ONLY

7-6

LCA (LOCAL COMMUNICATION ADAPTER)

Purpose:
The LCA wi II provide a direct connect binary synchronous communications
adapter on the System/3 Model 6, 10, and 15. This feature will allow
3741 to attach directly to System/3 Model 6, 10, and 15 disk systems,
without the use of modems. A direct connection to 3271/3275 will provide
limited function local CRT's on System/3 Model 10 and 15.
General Description:
The LCA feature is a simplified, reduced function BSCA similar to the
existing BSCA-1. A single data rate, EBCDIC transmission code and
local modemless connection describes the LCA feature.
LCA Functional Characteristics:
1.

Basic BSCA-1

Point-to-point non-switched network

EBCDIC transmission code

Local EIA modemless attachment at 2400 bits/second

No other BSCA features apply to LCA.
HARDWARE DESCRIPTION
Physical Requirements:
The LCA feature is mutually exclusive with BSCA-1 on System/3 Model 6,
10, and 15. LCA on System/3 is compatible with BSCA-2. All channel
bank, power group, etc., prerequisites for BSCA-1 apply to the LCA
feature.
Indicator panel molding has
LCA feature installed. The
operator console is replaced
cover BSCA on the 5406 CE

LCA in place of BSCA-1 on machines with the
5406 BSCA attention indicator located on the
with panel with LCA attention. LCA labels
panel.

IBM INTERNAL USE ONLY
7-7

Cable Requirements:
The same interface cable utilized by BSCA-1 Local Modemless Attachment
on System/3 is being used for this direct connect feature.
Attaching Device Requirements:
An attaching device will have a BSCA feature with a point-to-point nonswitched network, EBCDIC transmission code and an EIA data set interface.
PROGRAMMING CONSIDERATIONS
3741 Attached
Programming support for 3741 attached to disk systems is with the existing
RPG II Telecommunications feature.
3271/3275 Attached
For these devices the existing SCP ML/MP and CCP support applies to
System/ 3.
WORLD TRADE CONSIDERATIONS
The LCA feature runs at a fixed bit rate (2400 bps); therefore, the World
Trade Rate Select feature is not allowed.
All display panels with LCA in place is BSCA for the different language
groups are covered.

IBM INTERNAL USE ONLY

7-8

BSCA DIAGNOSTICS

BSCA BASIC AND ICA DIAGNOSTIC TESTS
The BSCA diagno-s-t-ic program~s made---up of 6 sections but only 5 of these
sections are required for any one BSCA. BSCA and ICA have separate but
similar diagnostics.
Each group of diagnostics must be run separately with the BSCA display
selection SW in the appropriate position. Sections 801 through 806 are
for BSCA. Sections 881 through 886 are for ICA. Sections 803/ 883 and
804/884 are the same except 803/883 is for an EBCDIC BSCA and 804/884
is for an ASCII BSCA. In diagnostics user's guide, block 19, describes
each section and routine in more detail. (The following steps are related
to the BSCA entry chart, starting on page 007.)
External Test Switch
Med Speed
or ICA

The switch on the end of the data set cable or
loca I modem less cable (See note 3) .

High Speed or
Med Speed

Local/test switch on the CE panel (See note 4).

Step 1 - Section 801 or 881
Section 801/881 is run with the EXT test SW in the off or operate position.
(EXT SW indicator should be off.) All sense switches used by the BSCA
should be off for normal running (SSW 1s are defined in block 19 of the
diagnostic user's guide) . Routine 06 and 07 are special routines which
are run only if the configuration is a switched network. The BSCA UDT
must have bit 1 7 1 on before these 2 routines are run.
Step 2 - Section 801 or 881
The printout from routine 05 should be checked for correct BAUD rate.
If the World Trade Corporation feature rate select SW is installed, switch
it to the other position and go to routine 05 to check this BAUD rate.
Section 801 is now rerun. This time, after a system reset, sense switch
16 is turned on the EXT test SW is put in the 'test' or 1 on 1 position (EXT
test SW indicate should be on). If a World Trade Corp. switched network
using CDSTL (Connect-Data Set-To-Line) and the 'Rate Select Switch'
feature are -installed, sense switches 16 and 10 should be set on. With
sense switched 16 on, the special routine 07 is not run.
IBM INTERNAL USE ONLY

7-9

Step 3 - Section 802 or 882
Section 802/882 is run with the EXT test SW still in the 'test or on'
position except if a high speed modem is installed which does not have
'local loop' test capability. If the high speed modem does have 'local
loop' capability or if 1200 BPS integrated modem feature is installed
(see note 4), the EXT test SW should be on and the sense switch 11
must be on.
In summary:
o

Medium Speed or ICA - EXT test SW in test
and SSW 16 on.

High Speed or med. speed with 'local loop' - EXT
test SW in test and SSW 11 on (BSCA UDT bit 's'
on the high speed, bit 1 and 8 on for 1200 EPS
integrated modem) .

High Speed with no 'local loop' - skip step 3
and go to step 4.

Routine 04 is a special routine which wi II be run only if sense switch 20
is on. This routine will continuously transmit SYN characters until a
system reset is given. If sense switch 21 is on, test mode will be set on.
This routine will be especially useful for CE remote assist. NOTE: If
this routine is used and sense switch 21 is not on, the EXT test SW must
be in 'operate' or 'off' as in step 4 below.
NOTE 1:
BSCA/ICA display select switch is used only to display either BSCA or ICA.
The SW does not cause a program to switch from one BSCA to the other.
NOTE 2:
Local modemless feature may be installed on medium speed BSCA. This
feature eliminates the need for a modem but normally the attaching BSCA
is within 40 ft. of the host CPU. The modemless cable can be identified
by opening the cable entry door at the rear of the CPU to find the
attaching BSCA cable connected directly to the host CPU modemless cable.

IBM INTERNAL USE ONLY
7-10

NOTE 3:
ICA (Integrated Communication Adapter) is installed on the 5408 and 5412.
The ICA uses the BSCA-2 diagnostic programs (PIO 88X). ICA is the
same as BSCA-2 with the following modification:
o

Same device address, interrupt priority and cycle
steal priority.

Basic ICA - the following do not apply to ICA:
High Speed, Autocall, Internal Clock, New SYNC,
Full Duplex (4-wire), Multipoint Tributary and
Mini-12.

Options:
EBCDIC or USASCI I
Transparency

Synchronous Line, Medium Speed (remote) Data
Set Clocking only.
Switched, Non-Switched or Multipoint Control Station.

8000 BPS Local Interface (Local 1) EIA Local modemless
attachment wired for 8000 BPS.

2400 BPS Local interface (Local 2) EIA Local modemless
attachment wired for 2400 BPS.

NOTE:

The interface switch is only installed when 2 or
more data link interfaces are installed.

NOTE 4:
The Local/Test SW on the CE panel is installed whenever:
o

High speed feature is installed, or

1200 BPS integrated modem feature (med speed) is
installed on BSCA only.

1200 BPS integrated modem feature (sometimes known as mini-12) is an
under-the-covers modem that supports:
o

Duplex (4-wire) or half duplex (2-wire)

Point-to-point non-switched or switched auto answer.

Operation over telephone company communications
facilities from either or both BSCA-1 and/or ICA.

IBM INTERNAL USE ONLY
7-11

To identify this feature, look for:
o

Cards in 04, E4, F4 (Basic and PT-PT NON-SW) of
the respective BSCA board B-A2.

Refer to logic pages A6009 and A6011 to identify
modem configuration.

If auto answer version of the 1200 BPS integrated modem feature is
installed, refer to step 8 for preliminary check out.
Step 4 - Section 802 or 882
Section 802/882 is now run with the EXT test SW in 'operate' or 'off'. This
time after a system reset, the EXT test SW must be in 'operate' or 'off'
position and if sense switch 11 or 16 was on in step 3, it must be turned
off now.
Routine 05 is a routine used to test the auto call unit if that switched network
feature is installed. The BSCA UDT bit '3' must be on to run this routine.
The BSCA will 'dial' the number put in core. The CE should use the number
of a nearby phone so he can hear it ring. This routine is bypassed when the
EXT test SW is in test and SSW 16 is on.
Step 5 - Section 803, 804 or 883, 884
If EBCDIC code is installed, section 803/ 883 should be used. If ASCII, section
804/884 should be used. BSCA UDT bit 1 6 1 on indicated the ASCII code is
being used. Bit 1 6 1 off indicated EBCDIC. NOTE: If the wrong section is
loaded, it will not be run and the 'BE' halt will occur.
Routine 03 checks the various differences between the receive initial instructions
for switched, multipoint, and point-to-point networks. BSCA UDT bit '7' and
'O' off for point-to-point network.
Section 803/883 and 804/884 can be run with the EXT test SW in either position.
Step 6 - Section 805 or 885
Routine 02 is run only if both transparency feature and internal clock features
are installed. BSCA UDI bit '4' must be on for transparency and UDT bit '1'
must be on for internal clock. Section 805/885 can be run with the EXT test
SW in either position.

IBM INTERNAL USE ONLY
7-12

Step 7 - Section 806 or 886
Routine 04 is similar to routine 04 in section 802/882 for continuous
transmit. This routine will allow the CE to choose the data to be
transmitted by using a data card if you have a card system. Sense
switch 20 must be on to run this routine. Section 806/886 can be
run with EXT test SW in either position. However, if routine 04 is
run, sense switch 21 must be on if the EXT test SW is in 'test' or
'on'.
Step 8 - Auto Answer 1200 BPS Integrated Modem (BSCA Only)
Read note 4. The following preliminary check of the auto answer
feature should be preceded prior to on-line communications.
o

Insure that all the CBS data coupler switches and
indicators are off and the hand set is cradled.

Enable your BSCA to answer a call. Load diagnostic
BOA and reset halt HA to bring up halt E2. (REF:
User's Guide Block 19).

Dial the modem number from a nearby voice phone.
Listen for a 2100 HZ 3 second auto answer tone.
At the end of this tone, insure data set ready comes
on.

This insures that the auto answer circuitry is
working properly.

If step 3 fai Is, replace auto answer cards
(B-A2G4 and B-A2H 5) .

IBM INTERNAL USE ONLY
7-13

DISPLAY AND CONTROL PANEL FOR ICA AND BSCA

ICA/BSCA
DT SET
READY

DT TERM
READY

ICA

BSCA
ATTN
TSM
MODE
RECEIVE
MODE

TEST
MODE

EXT
TEST SW

CLEAR
TO SEND

TSM
TRIGGER

CHAR
PHASE

RECEIVE
TRIGGER

RECEIVE
INITIAL

BUSY

UNIT
CHECK

CONTROL
MODE

DATA
MODE

DIGIT
PRESENT

ACU PWR
OFF

CALL
REQUEST

DT LINE
IN USE

LOCAL-1

ICA

REMOTE

LOCAL-2

BSCA

ICA

DISPLAY SEL

IBM INTERNAL USE ONLY
7-14

1200 BPS

600 BPS
RATE SELECT

Operator •s Console
The following indicators are located on the CPU Operator •s Console and
indicate the operationa I status of the adapter.
BSCA Attn:

This light is on when the 1/0 Attention is
caused by one of the not ready or check
conditions.

Unit Check:*

This light is on when any Status Bit from
Byte 2 is on.

DT Term Ready:

This light indicates that the BSCA is enabled
and that the Data Terminal Ready line to the
modem is on. With two WTC modems, this
indicator shows the status of the signal,
"Connect Data Set to Line".

DT Set Ready:

This light indicates that the Data Set Ready
line from the modem is on and the modem
is ready for use.

Clear to Send:

This light indicates that the Clear to Send
line from the modem is on and that the
adapter may now transmit.

Receive Trigger:

This light indicates the status of the Receive
Trigger. The light is on when the trigger
is at a binary 11 0 11 state (equivalent to a
"Space" on the Communication Line) .

TSM Trigger:

This light indicates the status of the Transmit
Trigger. The light is on when the trigger is
at a binary 11 0 11 state (equivalent to a "Space"
on the Communication Line) .

Receive Mode:

This light indicates that the BSCA has been
instructed to perform a receive operation.

TSM Mode:

This light indicates that the BSCA has been
instructed to perform a transmit operation.

*When an SNS Transition of SNS Stop Register instruction is executed, it is
possible for a LSR, S Register or DBI Register Parity Check to occur
resulting in a Unit Check condition. Under this condition, the Byte 2 Status
Bits may be all zero.

IBM INTERNAL USE ONLY

7-15

Receive Initial:

This light is turned on by a Receive lnitia I
instruction. It is turned off at the end of the
Receive Initia I operation.

Busy:

This light indicates that the BSCA is executing
a Receive Initial, Transmit and Receive, Auto
Call, Receive, or Loop Test instruction.

Char Phase:

This light indicates that the adapter has established
character sync with the transmitting station by
receiving two successive SYN characters. The
light is turned off at the end of the receive operation.

Data Mode:

This light is turned on by the decode of an SOH or
STX during a transmit or receive operation. It is
turned off at the end of the transmit or receive
operation.

Control Mode:
(Station Select
Feature)

This light is turned on when an EOT sequence is
detected in a Transmit, Receive, or Receive Initial
monitor operation. It is turned off by decode of an
SOH or STX.

Digit Present:
(Auto Cal I Feature)

This light is turned on by the BSCA when a new
dial digit is present on ACU interface.

ACU Pwr Off:
(Auto Call Feature)

This light indicates that the Auto Call Unit has
power off.

Ca II Request:
(Auto Call Feature)

This light indicates that the BSCA has received
an Auto Call instruction and is performing an
Auto Call operation.

DT Line in Use:
(Auto Call Feature)

This light indicates that the Data Line Occupied
Iine from the ACU is on.

Test Mode:

This light indicates that the program has placed
the adapter in a test mode of operation.

EXT Test SW:

This light indicates that the switch at the modem
end of the Medium Speed modem cable is in the
TEST position. For High Speed modems this
indicator wi II be active when the Local Test
Switch is in the on position.

These indicators are testable by the CPU Lamp Test Key.

IBM INTERNAL USE ONLY
7-16

Cable
P/N

From

BSCA 1
High Speed
Med Speed
Auto Call

2590807
1636476
1636477

Data Set
Data Set
Auto Call
Unit

A-A3A3,A4
A-A3A3
A-A3A5

Burndy Md 12 MXP
EIA RS232
EIA RS232

LCA

Note 1

Note 2

A-A3A3

Note 3

ICA (RPQ)
Remote
Local 1
Local 2

Note 1
Note 1

Data Set
Note 2
Note 2

A-A3A2,A3
A-A3A2,A4
A-A3A2,A5

EIA RS232
Note 3
Note 3

BSCA 1
High Speed
Med Speed
Auto Call

5133612
5133611
5133613

Data Set
Data Set
Auto Call
Unit

B-A2A3,A4
B-A2A3
B-A2A5

Burndy Md 12 MXP
EIA RS232; Note 5
EIA RS232; Note 6

LCA

Note 1

Note 2

B-A2A3

Note 3

BSCA 1
High Speed
Med Speed
Auto Call

5133612
5133611
5133613

Data Set
Data Set
Auto Call
Unit

B-A2A3,A4
B-A2A3
B-A2A5

Burndy Md 12 MXP
EIA RS232; Note 5
EIA RS232; Note 6

2590800
Note 1
Note 1

Data Set
Note 2
Note 2

A-A2A2,A3
A-A2A2,A4
A-A2A2,A5

EIA RS232
Note 3
Note 3

CPU
Type
5404

Adapter Type

To Bd
Socket

Cable
Termination

....... :::0

..... )>

....... r

5406

c(/)

m
0

~
5408

ICA

Remote
Local 1
Local 2

5408
(cont.)

5410

-I
m

To Bd
Socket

Cable
Termination

Cable
P/N

From

Integrated 1200
BPS Modem
(Mini-12)
Leased Line

2775810

Switched Line

2775811

Leased
Line
Coupler

BSCA
-

1
High Speed
Med Speed
Auto Call

2590807
2590800
2590802

Data Set
Data Set
Auto Call
Unit

B-A2A3,A4
B-A2A3
B-A2A5

Burndy Md 12 MXP
EIA RS232; Note 5
EIA RS232; Note 6

BSCA 2
Med Speed
Auto Call

2590800
2590802

Data Set
Auto Call
Unit

B-A3A3
B-A3A5

EIA RS232; Note 5
EIA RS232; Note 6

LCA

Note 1

Note 2

B-A2A3

Note 3

Integrated 1200
BPS Modem
(Mini-12)
Leased Line

2775810

Leased
Line
Coupler

Adapter Type

CPU
Type

"t Z
;tJ

4 Prong Plug
8 Wires

- )>
co
r

m
0

z
~

Switched Line
Note 4

2775811

4 Prong Plug
8 Wires

Cable
P/N

Adapter Type

CPU
Type

To Bd
Socket

From

Cable
Termination

---·-

5412

BSCA 1
High Speed
Med Speed
Auto Call

2590807
2590800
2590802

Data Set
Data Set
Auto Call

B-A2A3,A4
B-A2A3
B-A2A5

Burndy Md 12 MXP
EIA RS232; Note 5
EIA RS232; Note 6

BSCA 2
Med Speed
Auto Call

2590800
2590802

Data Set
Auto Call

B-A3A3
B-A3A5

EIA RS232; Note 5
EIA RS232; Note 6

Note 2
Note 2

B-A3A2,A3
B-A3A2,A4
B-A3A2,A5

EIA RS232
Note 3
Note 3

ICA

'1
I
~

-I
m
;o

z)>

2590800
Note 1
Note 1

Remote
Local 1
Local 2

Integrated 1200
BPS Modem
(Mini-12)
Leased Line

(/)

2775810

z
r

2775811

Switched Line:
Note 4

4 Prong Plug

Leased
Line
Coupler

8 Wires

..,

5415

BSCA 1
High Speed
Med Speed
Auto Call

BSCA 2
Med Speed
Auto Call
_,,, ..

2590807
2590800
2590802

Data Set
Data Set
Auto Call
Unit

2590800
2590802

Data Set
Auto Call
Unit
··---·------ ---

.........

-----~--

•

B-A2A3,A4
B-A2A3
B-A2A5

Burndy Md 12 MXP
EIA RS232; Note 5
EIA RS232; Note 6

B-A3A3
B-A3A5

EIA RS232; Note 5
EIA RS232; Note 6

---··-•

--·

CPU
Type
5415
(cont.)

CJ
~

-i
m
-....J
I
N
0

:::0

m
0

Adapter Type

Cable
P/N

From

LCA

Note 1

Note 2

Integrated 1200
BPS Modem
(Mini-12)
Leased Line

2775810

Leased
Line
Coupler

Switched Line
Note 4

2775811

To Bd
Socket

B-A2A3

Cable
Termination

Note 3

4 Prong Plug
8 Wires

NOTES:
1.
Cable supplied by attaching BSC device.
2.
Attaching BSC device.
3.
System/ 3 internal cable terminates at tailgate with EIA RS232 connector.
4.
Integrated 1200 BPS Modem (Mini-12) can be installed on BSCA 1 and/or BSCA 2.
5.
P/N 5133611 and P/N 2590800 are functionally the same.
6.
P/N 5133613 and P/N 2590802 are functionally.

DISPLAY ADAPTER
The System/3 Display Adapter is an attachment designed to allow online
access to a remote user. It is used to either provide information on a
display screen, punched card output, hard copy printout or to alter
data at the user's request from a remote console/keyboard.
The attachment wi II support 6 termina Is on a 5404, 12 terminals on 5408
or 5412, and up to 30 terminals on a 5415. The terminals that can be
attached include 3277 (both Model 1 and 2), 3284, 3286, 3288, and 129 RPQ.
Each terminal is connected to the attachment by a single coaxial cable up
to 2000 feet in length.
The Display Adapter is mutually exclusive with ICA or BSCA 2. (It uses
BSCA 2 device address, interrupt level and cycle steal priority.) It
emulates a 3271 BSCA with EBCDIC point-to-point non-switched support.
Minimum system size is 32K.
Data transfer between the attachment and CPU is by means of cycle steal
via the 1/0 channel. Transfer is serially by byte. Data transfer between
the attachment and the terminal is serially by bit with 13 bits per word.
Instructions to the Display Adapter come in two forms: BSCA/3271 emulation
instructions (device address 88 or 8A) or attachment instructions (device
address 4X or 5X) . The attachment, when addressed, wi II acknowledge TIO,
LIO, SNS, and SIO instructions.
The Display Adapter uses cycle steal priority level 10 with cycle steal lines
DBO 0 and DBO 7. Device address for attachment initialization is channel
address 4 with an M bit of 1 or channel address 5 with an M bit of 1.
Device address for 3271/BSCA emulation is 88 or SA.
Interrupts are handled on interrupt level 2, using one CPU LSR (LSR lines
3 and 6) as a main storage address register for data location.
The attachment is divided into the following functional elements:
Microprogram:

Located in read/write control storage, it consists of
a series of micro instructions arranged in routines
to service requests.

M icrocontrol ler:

Hardware microcontroller provides sequential
execution of micro instructions read from control
storage.

IBM INTERNAL USE ONLY
8-1

Adapter Base:

Contains the logic that provides a control interface
between the microcontroller and the various data
and address registers residing within the attachment.

Line Adapter:

A line adapter is selected by the microprogram
based on the unit address. A selected I ine adapter
gates the serial SERDES input and output to and
from the coaxial cable that connects the unit via
line driver/receiver circuits. There are three
I ine adapters per feature card.

FET Storage:

The FET storage cards used in DA contain 2K of
nine bit storage. Two cards are used for Model
1 support and three cards are used for Model 2's.
This is a total of GK of nine bit bytes and acts as
control storage and high density buffers.

The following steps must be taken by the host program to initialize the
Display Adapter attachment, using attachment instructions, before any
BSCA/ 3271 emulation instructions can be accepted after a power on.
16 attachment LIO's to the op decode must be issued to provide the
op decode (32 positions) with the proper information.
16 attachment LIO's to the HDB 's (High Density Buffers) must be
issued to insure proper parity in the 32 low order HDB's (LIO's
and SNS commands are directed to the low order HDB's when the
attachment is disabled).
Enable the attachment with an SIO.
16 attachment LIO 's (any data) to the HDB 's must again be issued
to insure parity in the next 32 HDB's.
(LIO's and SNS commands
to the HDB after the attachment is enabled are directed to the high
order HDB.)
The entire control storage must be initialized with LIO's to load the
microprogram.
(It should then be sensed to insure that it was
loaded properly.)
Enable the microcontroller with an SIO.

IBM INTERNAL USE ONLY
8-2

The attachment will now accept BSCA/3271 emulation type instructions.
The configuration emulated is local, point-to-point, EBCDIC, nonswitched. There are no modems, no data sets and no bi-sync line
discipline.
Diagnostics include 891 (attachment test), 893 (microcode loader), 894
(function test), FC 7 (functional microcode) and FC 8 (program to update
Display Adapter microcode).
(One thing to remember when using FC 8 is
that on the PID pack, there is a non-functional data set labeled $@MCRI. FC
8 assumes $$MCRI data set labels, so when updating PID pack, the name $@MCRI
must be furnished. On system pack, the name is $$MCRI.) FC 8 wi II print
prompting messages and questions prior to copying the microcode.
Diagnostic tools include:
Indicator card (P/N 5558107) which is one of two one-wide cards each
containing nine light emitting diodes (LED's). This allows one byte of
information to be displayed by each card.
The indicator card which plugs at ZS is used in conjunction with the
'Display Select' and 'HDB/TSN SEL' switches (on CE selector box) to
display HDB registers.
(See DA TMD)
The indicator card at location Z6 is a permanently wired display except
for bit O which is selected by the 'HDB/TSN SEL' switch to display various
bit or latch conditions.
(See DA TMD)
The part number of the CE selector box is 5558132 and it plugs into Z3 and
Z4.
The part number of the display/sync logic card which plugs into position
P2 is 8239421. The part number of the CE panel overlay is 4234248.
(The overlay and card are available as B/M 4234322.)

IBM INTERNAL USE ONLY
8-3

THIS PAGE INTENTIONALLY LEFT BLANK

IBM INTERNAL USE ONLY

8-4

ENVIRONMENTAL

Introduction
From the time of the System/3's inception in 1969 until now in the midseventies, the product line has not only increased numerically, but also
in its importance to the user's throughput.
What was initially regarded as a general purpose computer for a small
customer, has now increased in size and complexity so that System/3
models now rival midrange 370 1 s in applications. From a self-contained
system that resided in one piece in the customer's environment, it has
grown to become a centra I unit cabled to I/0 up to 2000 feet away.
This change in size, complexity, and usage found in the customer's
applications demands an up-to-date approach to the solution of his
problems. One of these problems now coming to the fore is ESD.
ESD problems are among the most difficult of problems to identify and
fix. Without the proper tools and diagnostic approach, these problems
could be insurmountable. For this reason, an understanding of ESD
Service Aids and the tools available to your Installation Planning
Representative is very beneficial.

IBM INTERNAL USE ONLY
9-1

This section will introduce you to the special tools available to
the IPR
(Installation Planning
Representative}.
use
and
application of IP tools and test equipment will be described.
There are many areas of physical planning that require the use of
specialized tools or test equipment.
These devices will be
described and their use discussed.
H~wever, proficiency in their
use
and application can only be developed
by
"hands-on"
experience.
Special Tools and Test
Clamp-on Ammeter
Weston AC Voltmeter {or equivalent}
Null Balanced Earth Tester
Phase Sequence Checker
Esterline-Angus Recording Voltmeter
Environmental Monitoring Device (EMO}
Sling Psychrometer
Thermohumidigraph
Electrostatic Locator
Spark Gap
Megohmeter
Electrostatic Discharge Simulator {Zapper)
Probe Converter Attachment (Mini-Zapper}
Single Discharge Control Unit
Scope Loop with 453 Scope
R.F. Field Intensity Meter
Line Interrogation Device
Tektronix C-31-P Trace Recording Camera
Stoddart Probe
Radar Crystal Detector
Ground Monitor (OPD Tool)

Most Physical Planning special tools can be grouped into several
general categories, defending on their application:
o

Power and Grounding Measurements
1.
2.
3.
4.

5.
o

Clamp-on Ammeter
Weston AC Voltmeter (or equivalent)
Null Balance Earth Tester
Phase Sequence Checker
Esterline-Angus Recording Voltmeter

Customer Environment (Site)
1.
2.
3.

Evaluation

EMD
Sling Psychrometer
Thermohumidigraph
IBM INTERNAL USE ONLY

9-2

POWER AND GROUNDING MEASUREMENT TOOLS

The Clamp-on Ammeter can be used to indicate the amount of AC
amperage on a phase conductor or on a green-wire ground. The
balance of AC phase-wires can be readily determined.
The
loading of a power panel feeder can also be measured.
The Clamp-on Ammeter is capable of measuring AC Voltage with
the test leads supplied.
An interesting feature of the meter is the ability to lock
the scale with the reading ottained when the meter scale is
not visible.

The Weston AC Voltmeter is an instrument with a mirrored
scale to be used when an accurate ac voltage reading is
necessary.
It should be utilized whenever a voltage is
suspected of being close to a high or low limit of tolerance.
The Esterline-Angus Recording Voltmeter (described later) can
be calibrated using the Weston AC Voltmeter.
The CE Meter, the voltage scale of the Clamp-on Ammeter and
the Recording Vcltmeter are ~2! to be relied upon for
accurate AC voltage measurements.

Th~ Biddle Null Balanced Earth Tester is an
instrument with
good low range accuracy to measure resistances from .01 ohms
to 10K ohms. !his instrument is used to make relative ground
measurements within the room including green wire ground,
water pipe, conduit
and
raised
floor
understructure
resistances. 7he accessorv kit includes steel rods which can
be employed to make soil c;nductivity tests.
cranking the
handle on the side of the instrument generates about 90 volts
of low frequency AC.
Null balance is obtained by adding
resistance into the internal bridge using the knobs and
setting the multiplier range in the center of the panel.
The
actual resistance is read from the setting of the knobs and
multiplier used to achieve a null.

The IBM PSC is a device for determining whether an input
power receptacle is wired in the proper phase sequence for
IBM equipment. It was designed for use on Russell & Stoll 30,
60, and 100 Ampere (or is required as an indicating device.)
It is estimated that some forty percent of the input power
receptacles
in customer locations are initially phased
improperly for IBM equipment.
Not all IBM equipment is phase
sensitive;
howeve~,
a forty percent exposure to lost man
hours does exist if the specific machine is sensitive to the
power phase sequence.
IBM INTERNAL USE ONLY

9-3

Before plugging the equipment into the receptacle a Phase
Checker is a safe and easily used test unit for determining
if the input-power receptacle is wired in the phase sequence
that will be compatible with IBM equipment.

The Esterline-Angus Recording Voltmeter is used to monitor
and evaluate primary ac power variations. This instrument
records the full reading of a 6 hertz disturbance and is
capable of registering down to a half hertz disturbance at
reduced amplitude.
~he
recording voltmeter has
proven
valuable to the field by demonstrating how attached loads
affect the computer feeder line regulation.
SITE EVALUATION TOOLS

The EMD was developed to provide an easy means of determining
the atmospheric severity of a site.
It is an analytical tool
used during routine installation~ to assist in the decision
of matching the machine to the installation environment.
The EMD consists of two cartridges and a pumping unit.
The
EMD cartridges, which are mailable, are connected to the
pumping unit for collecting atmospheric
samples.
One
cartridge contains four chemically treated filters, which
selectively react with
and
permanently
trap
several
pollutants.
The first filter collects particles, the
second collects chlorine, the third
collects
reactive
sulphur, and the last filter reacts with and retains sulphur
dioxide. Those filters,
when returned to
the
central
laboratory at Raleigh, can easily and rapidly be analyzed by
a special process.

The Sling is used to obtain readings of temperature and
relative humidity.
This is a simple instrument to use, but
its accuracy depends on proper use and care.
It consists of two accurate thermometers mounted in a frame
attached to a swivel. The s~ivel attaches to a handle.
The
two thermometers can be swung in a circular fashion by means
of the handle and swivel joint. One of the thermometers has
a
woven
cloth
similar to a "sock" fitted over the
mercury-filled bulb portion. This
thermometer
is
the
"wet-bulb" thermometer.
The action of slinging the two
thermometers through the air simultaneously causes
the
dry-bulb thermometer to register the temperature of the
ambient air while the wet-bulb thermometer reading becomes
lower.
The action of moving the wet bulb through the air
speeds up the evaporation process of water from the wet bulb.
Since
evaporation is a cooling process, the wet bulb
thermometer temperature drop is dependent on the ability of
the air to accept moisture. When the wet-bulb and dry-bulb
IBM INTERNAL USE ONLY

9-4

temperatures are applied to a psychrometric
relative humidity can be accurately determined.

chart,

the

The Bristol Thermohumidigraph Model 4069TH is a temperature
and relative humidity recorder which can record over a 7-day
period on a circular chart. The unit is portable and is
powered by a spring wound mechanism to drive the chart.
Use
of this device provides hard copy of temperature and relative
humidity
which can be useful in solving a customer's
environmental Frcblems.
Some factors that have an influence on the environment and may be
assessed with the use of test instrumentation are:
Temperature and humidity.
Type of raised floor and surface material.
Grounding
Electrical Power
Furniture and Carts
Radiation
The following tools and test equipment
resolve problems of unusual nature.

are

generally

used

Electrostatic Locator
Spark Gap
Earth Tester (listed earlier)
Megohmeter
Electrostatic Discharge Simulator (Zapper)
Probe Converter Attachment (Mini-Zapper)
Single Discharge Control Unit
Scope Loop
R.F. Field Intensity Meter
Sling Psychrometer (listed earlier)
Thermohumidigraph (listed earlier)
Line Interrogation Device
Event Pen (s)
Event Recorder Control Unit
While tools and test equipment are grouped as above
for
explanatory purposes,
their use is not restricted to those
specific categories. As a matter of fact, it is best to know the
proper combinations of these tools for use in a given situation.
Some tools will be utilized more frequently in a routine manner
such as the Clamp-on ammeter and the phase sequence checker.
Accurate voltage measurements should be made with a calibrated
instrument such as the Weston AC Voltmeter or digital voltmeter.

With the advanced technology, faster circuits, and lower signal
levels, IBM recognizes environment as a vital consideration in
system design, installation, and operation.
As a
result,
Customer Engineering has developed a more sophisticated knowledge
IBM INTERNAL USE ONLY

9-5

of
EMC
(Electro-Magnetic Compatibility)
noise analysis and
instrumentation used to diagnose and define the froblems in the
field.
This noise can cause systems failures and can be defined
by the following three general areas:
1.
2.
3.

Static:
High voltage builtup on furniture or people and
then discharged to ground on or near the system.
Input Power and Grounding:
Power Line transients on the
power feeder and high resistance or noisy grounds.
Radiation:
Radar electromagnetic interference and high
frequency
broad
band radiation coupling into our
systems.

Pe rsonnel, furniture, raised floors and relative humidity are
major factors that contribute to static buildup.
The tools used
in defining and solving static problems are:
Electrostatic
Locator,
Spark Gap, Earth Tester, Megohmeter, Thermohumidigraph
and Electrostatic Discharge Simulator (zapper)
and Static Loop
(see Gener a l CEM 256 and 268).

Th e Electrostatic Locator is used to measure the electrostatic
charge on any object.
A Sfecial scale has been calibrated to
p r ovide direct reading in kilovolts.
This kilovolt scale is
valid when the static locator is held about one inch from
the
o b j e ct being measured.
You can measure how much charge is built
u p on a Gonsole chair or a cart by reading the value directly
f rom the kilovolt scale.
In a similar manner you can
d e monstrate how much charge Feople can build up or carry from cne
obj e ct to another.
This static buildup is more easily understood
wh e n it is detected by the electrostatic locator.
Actually it is
th e buildup and sudden discharg e that creates static noise.
The spark gap can be connected b e tween the chair or cart and
ground to further demonstrate the static charge buildup by
o b serving the arc that will jump the gap to discharge the object.
IBM INTERNAL USE ONLY
9- 6

The Biddle Null Balanced Earth rester has a good low-range
accuracy from .01 ohm to 10,000 ohms. This instrument is used to
make comparitive resistance measurements of available grounding
points within the room, it can be used to measure the resistance
of green wire, water pipe, conduit, raised floor understructure,
etc.,
(In most instances all the metal in the room will measure
less than one ohm. By the reference measurement technique, a high
resistance ground can be detected.)
The accessory kit includes
test leads and stakes which can be used to measure actual earth
resistivity.

Tne Megohmeter used with Biddle test electrodes and the special
coax leads can accurately measure high resistance up to 100,000
megohms.
The surface conductivity of a raised floor can ce
measured to determine it's atility to dissipate a
static
chargE.
Also the actual in-circuit resistance of a raised floor
can be measured.
The short black lead is attached to the
Electrode and the red lead to the pedestal of the raised floor.
The resistance measured should be between 50,000 ohm's and 2,000
megohm's.
The chair resistance is measured from the metal frame
of the chair to a ground
Flane under the caster.
If the
resistance is less than
100 megohms the chair will not hold a
charge.
Resistance on carts is also measured in this manner.

I BM INTERNAL USE ONLY

9- 7

The Electrostatic Discharge Simulator, sometimes called a zapper,
simulates the average discharge characteristics of furniture.
A
three minute run frovides about 10,000 discharges.
A control
adjusts the discharge voltage between 0 and 2500 volts.

IBM INTERNAL USE ONLY

9-8

An attachment has been developed known as the Mini-Zapper (P/N
5187150).
This gIQh~ ~QQY~fte1 A1!~ch~~n! is built into the same
simulator case and uses the 2500 volt DC supply of the type 1
simulator.
An internal RC circuit is charged rather than the
vane assembly of the type 1 simulator. Radiation from one of four
probes provides a means of determinin~ individual wire or circuit
noise sensitivity.
The probes provide the user with the ability
to introduce noise into a single board via a board radiator, into
a secticn of logic board via a strip radiator or a disk radiator.
Also available is the Sing!~ Qi§£h~fg§ ~£n1f£1 Qni1 which changes
the discharge rate from 60 Hertz to a manual rate controlled by
the operator.
Additionally, anytime that EMI (Electromagnetic Interference) is
suspected, the ~£~~§ 100£ should be employed.
The scope loop
is a 5 1 piece of insulated wire coiled into 3 loops with the ends
connected together.
The loop is
then
connected
to
an
oscilloscope which gives an indication of radiated noise in a
facility.
For complete detail of construction and operati c ~ of
the scope loop,
refer: to General CEM #268 "Procedure for
evaluating electromagnetic interference in a computer rocm''·
The
scope loop should be the f!I§! ~~n§ ~mplg~~g te make an
evaluation of an environment suspected of having RFI or EMC
rr oblems.

SLING PSYCHROMETER

The accuracy of the Sling Psychrometer depends on its proper use
and care.
This instrument is used to check the calibration of
the
customers
temperature
and
relative
humidity
recorder.
Experience indicates that when the recorder is in
error it freguently reads 10 to 25 percent high but never low.
The portable Bristol temperature and relative humidity recorder
runs 7 days and records on an 8 in.
chart.
It can be taken into
a customer's computer room and left there for as many weeks as
required to provide a long term hard copy record of the
environment.
Many times machine errors are related to a change
in the temperature or relative humidity in the computer room.

IBM INTERNAL USE ONLY

9-9

Low relative humidity 10-20% allows static to build up on
surfaces.
Relative humidity between 40-603 allows a discharge
path of water molecules and static does not build up as readily.

BRISTOL'S THERMO llUMIOIGRAPH

Static genera~ion is a primary concern within a computer room.
Removal cf the major static source could well prove to be the
simplest solution to an intermittent static related problem.
The
service aid in General CEM #256 entitled "Static Environment
Evaluation" suggests a
measurement procedure for the Branch
Office Installation Planning Representative to effectively define
static sources within the room.
Logical judgement can now be
used to determine the most appropriate action to improve the
environment.

Input power and improper grounding maybe a factor of system
failures.
The following are the major factors that contribute to
improper input power and grounding.
Power line disturbances,
ground loops, RF noise, high resistance grounds and current on
the green wire.
rhe tools used for input power and ground
analysis are the Earth Tester and probe, Clamp-on Ammeter,
Stoddart Probe,
Esterline-Angus rapid response voltmeter, line
Interrogation Device.
and Tektronix C-21-P Trace
recording
camera.

IBM's grounding practice should be adhered to, ie; the grounding
conductor should be continuous from the power receptacle to the
grounding point.
Conduit ~Q§! QQ! be used as the grounding
conductor.
No connection should be made to the neutral.
This is
a
non-current
carrying ground, not a
neutral.
Grounding
conductors should not be attached to nor run parallel to conduit
carrying power to other large loads such as compressors, etc.
Noise can be coupled to an otherwise quiet ground.

I BM INTERNAL USE ONLY

9-10

The Earth Tester previously discussed
evaluate the good green wire ground.

one

tool

used to

CLAMP- ON AMMETER

The Clamp-on Ammeter is a simple instrument which has solved many
problems in the field.
It can be used for checking the green
wire for 60 cycle neutral current and determining phase balance
by measuring current flow in each of the 3 phases.

STODDART PROBE

The Stoddart Probe is released as a Region Office tool.
It is
used to measure high frequency current flow.
The probe has a one
and a quarter inch window and a frequency range up to 140
megahertz.
A 50 ohm terminator is required for the 453 scope.
The presence of high frequency current can be detected on the
green wire or frame ground on the system.
Excessive high
frequency noise can cause system failure or perhaps increase the
system sensitivity to static discharge.
Radiation problems
frequently couple high frequency noise to phase or ground
wires.
The Stoddart Probe provides a means of detecting this.
Electrostatic discharge (a burst of high frequency current flow)
can also be detected by the Stoddart Probe.
To determine which
of several ground sources has lowest RF impedance path use the
system or zappec as a radio frequency source.

IBM INTERNAL USE ONLY
9-11

ESTERLINE - ANGUS

The Esterline-Angus rapid response voltmeter is used to evaluate
power line variations.
This meter records the full reading of a
6 cycle disturbance and is even capable of indicating a half
cycle disturbance, not cf full amplitude howeverv
Even with its
response limitations this has froven very valuable to the field
by demonstrating how other loads affect the ccmfuter feeder line.

LID
(Line Interrogation Device) will detect power excursions in
either the negative er fOSitive direction anywhere on the voltage
sine wave.
This is accomplished by comparing one sine wave to
the preceding sine wave.
The sensitivity knobs are adjusted to
trigger
on
a
particular
voltage level or amplitude of
disturbance.
Any detection will turn on an indicating lamp and
sound an audible alarm.
The audible alarm is required to permit
correlation of system error indications
with
power
line
disturbance.
The LID can be used to trigger an oscilloscope
with a scope camera to provide a hard copy record.
The LID can
sense a two microsecond disturtance.
This means that typical
power line disturtances such as cafacitor switching and contact
bounce from desk top adding machines can easily be detected.
It must be recognized that
the LID does not in any manner
indicate steady state RMS voltage either 115 or 230 volts.
An
Esterline Angus recording voltmeter should be used in conjunction
with the LID for a complete problem analysis.
In some cases a
malfunction may be related
to low voltage rather than the 10
percent transient that the LID has detected.
IBM INTERNAL USE ONLY

9-12

The LID can also be used in conjunction with the Recording
Voltmeter via an ERCU (Event Recorder Control Unit).
Event pens
can
be added to the Esterline-Angus recording voltmeter to
Frovide hard copy indication of events occuring at certain
times.
The ERCU provides power and current to operate the event
pens.
The LID provides an output when transients are detected
which can be interconnected to the event pens via the ERCU.

TEKTRONIC C - 13- P CAMERA

The Tektronix c-31-P trace recording camera can record any trace
detected by a 453 er 454 scope.
The camera mounts directly to a
453 or 454
•scope and can be used with the LID to photograph
power line disturbances and power line transients when ·it becomes
necessary tc
prove to a customer and/or power company that the
power line is at fault.
Also by using the oscilloscope in chop
ruode one can photograph concurrently the power disturbance and
its effect on a DC voltage level. 1his
•scope camera technique
can also be used with the Stoddart Probe to capture a microsecond
distucbance.
In summary the instrumentation discussed can evaluat e the nature
of electrical disturbance on the input power and grounding to our
syst e ms.
The occurrance of ground shift, load changes, capacitor
s witching,
high resistance grounds and high
frequ e ncy noise
caused by many sources can be detected.

Th e third category of system failure as related to environm e ntal
nois e analysis is radiation or electro-magnetic interference.
Some of the causes of radiation
problems are radar,
microwave
repeaters,
RF heaters and electrostatic
arc welders and arc
furnaces.
The tools used for radiation analysis are the
Radar
crystal Detector, the Stoddart Probe and the •scope camera.
The Radar Crystal · Detector package consists cf appropriate
ant e nna attenuators,
crystal detectors and
453
'scope.
A
calibration chart converts •scope readings into values of radar
ii e ld intensity.
I UM INTERNAL USE ONLY
9- 13

STODDART PROBE

The Stoddart Probe can be useful in detecting RF radiated energy
coupled to power or ground lines.
EMI problems have been solved
in the field through the use of this tool.
For visual hard copy
of the failure a •scope camera can be utilized.

R. F

FIELD l~TE"lSITY METER

Additional Tools
An R.F.
Field Intensity Meter for IPR's is available from
Boca Raton Field SupFort to measure narrow-band and broad
band radiation that may be present in a facility.
This
instrument is capable of quantitative analysis of RFI
(Radio
Frequency Interference) • The meter is capable of monitoring
the spectrum from .5 MHZ to over 900 MHZ.
Ground Monitor Part #9900453

(OPD Tool)

This device is used to detect whether or not proper ground
and AC polarity are available from 115 Volt power outlets.
This tool is described in Tools and Test Equipment CEM #174.
SOURCES OF INFORMATICN
As you have seen, there are many test instruments available to
you, each having a specific purpose.
The accuracy in determining
the results of a particular test procedure comes only with the
experience of the operator in the use of that device. Therefore,
it is recommended that some practice testing be done, prier to
actual use of the testing instrucment in the customers account,
to develop confidence in its use and application.

IBM INTERNAL USE ONLY

9-14

To help you evaluate accuracy of a particular environment some
aids are available in the General CEMs. These are:
CEM #66 EMC/NOISE/POWER Support Structure.
#255 Environmental Noise Analysis.
#256 Static Environment Evaluation.
#268 Procedure for Evaluating Electromagnetic Interference in
computer Room.
#269, 270, 171 - Environmental Analysis and
EMC/ NOISE POWER - Evaluation.
#276 - LID operation Limits

Instrumentation,

Also available for certain unusual situations are:
Hard Hat Part #5442867
Hard Hat Liners Part #5442868
(General TSL #89)
C.E. Coveralls
Small - #453660
Medium - #453661
Large - #453662
(General TSL #85)
supplies for the Esterline-Angus
available by part number.
Chart Paper (Roll)
Accessory Kit
Red Ink (Bottle)

recording

voltmeter

are

now

#453573
#453574
#453586

*Also check Tools and Test TSL #128 for a safety hazard on
the Esterline-Angus Recorder.
The group of instruments just presented are described in Tools
and Test Equipment !SL #28"
Prices may be obtained from your
Regional Designated Specialist.
These tools are used in the customer account within the Branch.
The "Recommended Location" to place the tools at either Region or
Branch is based upon (1) cost of tool, (2) frequency of use,
(3)
portability of the tools, and (4) the delicacy or precision of
the instrument.

IBM INTERNAL USE ONLY

9-15

IBM PAET
]JB:rn~.E

Thermo-Humidigraph
Sling Psychrometer
Electrostatic Locator
Clamp-on Ammeter
(See TSL for list of
supplies and P/N)
Electromagnetic Compatibility
Simulator (Zapper)
Recording Voltmeter
(See TSL for list of
supplies and P/N)
Phase Sequence Checker
Weston AC Voltmeter
AC Ground/Neutral Tester

Environmental
Monitoring Device (EMD)
Cart P/N
Line Interrogation
Device 60 HZ
Textronic C-31-P
Trace Recording Camera
camera Carrying Case
R.F. Current Probe
Analog Event
Esterline-Angus Recorder*
See TSL #28 for List of
supplies & P/N
aegohmeter
Test Electrodes Kit
(megohmeter)
Earth Tester
Accessory Kit
(Earth Tester)
Event Recorder
Control Unit
Event Pen Kit

453539
453543
453541
453554

Tools
"
"
"

28
28
28
28

453204
453571

453599

453650

453651
453671
453613

453203
460880
9900453

453208
1748250

453540
453542

"11

28
28

453537

453538

"
"

28
28

453224

453657

h.F. Field Intensity Meter

IBM INTERNAL USE ONLY

9-16

ESD (5404)

5404

--1_____

1------

5_2_1_3;_M_o_d_3___

Point
Point
Point
Point
Point
Point

2
3
4
6

22 inches
22 inches
22 inches
Center of
Center of
Center of

from floor center
from floor center
from floor center
cover on modesty
attachment board
top file

of cover
of cover
of cover
ski rt

IBM INTERNAL USE ONLY

9-17

ESD (5408)

5408

Enclosure

5213

Point
Point
Point
Point
Point
Point
Point
Point

1
2
3

4
5
6
7

22
22
22
22
22
22
22
22

inches
inches
inches
inches
inches
inches
inches
inches

IBM INTERNAL USE ONLY
9-18

from
from
from
from
from
from
from
from

floor
floor
floor
floor
floor
floor
floor
floor

center of 5444 cover
6 inches from edge
center of modesty ski rt
6 inches from edge
center of cover
center of cover
center of cover
6 inches from corner

ESD (5410)

5410

5424

5203
Point
Point
Point
Point
Point
Point
Point
Point
Point

22
22
22
22
22
22
22
22
22

2
3
4

5
6
7
8

inches
inches
inches
inches
inches
inches
inches
inches
inches

I BM INTERNAL USE ONLY

9-19

from
from
from
from
from
from
from
from
from

the
the
the
the
the
the
the
the
the

floor
fl oar
floor
floor
floor
floor
floor
floor
floor

center of cover
center of cover
6 inches from edge
center of modesty skirt
6 inches from edge
6 inches from edge
center of cover
center of cover
6 inches from corner

ESD (5412)

5412

5424
5471

5421

Point
Point
Point
Point
Point
Point
Point
Point
Point
Point

2
3

4
5
6
7
8
9
10

22 inches
22 inches
22 inches
22 inches
22 inches
22 inches
22 inches
22 inches
22 inches
Center of

from the
from the
from the
from the
from the
from the
from the
from the
from the
Selectric

IBM INTERNAL USE ONLY
9-20

floor
floor
floor
floor
floor
floor
floor
floor
floor

center of cover
center of cover
6 inches from edge
center of modesty skirt
6 inches from edge
6 inches from edge
center of cover
center of cover
6 inches from corner

ESD (5415)

5415

Keyboard

5424

5421
Point
Point
Point
Point
Point
Point
Point
Point
Point
Point

2
3

4
5
6
7

8
9

22 inches
22 inches
22 inches
22 inches
22 inches
22 inches
22 inches
22 inches
22 inches
Center of

IBM INTERNAL USE ONLY
9-21

from floor
from floor
from floor
from floor
from floor
from floor
from floor
from floor
from floor
Keyboard

center of cover
center of cover
6 inches from edge
center modesty ski rt
6 inches from edge
6 inches from edge
center of cover
center of cover
6 inches from corner

THIS PAGE INTENTIONALLY LEFT BLANK

IBM INTERNAL USE ONLY
9-22

Use of Non-IBM Supply Items and Disk Packs in
IBM Equipment
It is a fundamental IBM principle that every customer must
receive the best possible IBM service to ensure the best
possible performance by each IBM machine or unit. Since
this principle applies under all circumstances, it includes
among others, situations where some other manufacturer's
ribbons, cards, tape or disk packs are used in IBM machines.
No machine trouble is to be attributed to the use of such
items, either IBM's or another supplier's, until we have
determined beyond any reasonable doubt that such is the
case.
Rechecking
Machine
Adjustments

If there is a good reason to believe that machine
problems may be the result of imperfections in
supply items or disk packs being used, the machine
adjustments should be rechecked by CE. This includes
readjusting the feed or transport within allowable
tolerances, realigning guides, checking and resetting
related clearances or projections, and making variations
in individual adjustments within specifications in an
effort to obtain satisfactory performance.

Off-Specification
Adjustments

If the Customer Engineer's efforts do not result in
satisfactory operation of the IBM machine, offspecification adjustments should be tried in a
further effort to overcome the problem and allow
the customer's work to continue. Since the customer
may not achieve optimum performance of the IBM
equipment under these conditions, Branch Management
is to inform the customer of the rechecking, the offspecification adjustments, and the results of CE efforts.
The customer should also be advised that no further
adjustments wi 11 be made except to I BM specifications.
IBM has always readily provided specifications for
supplies and accessories which would give the best
performance when used with its equipment. Therefore,
if any supply items or disk pack creates undue difficulty,
the customer should be encouraged to contact the
supplier for a solution.

IBM INTERNAL USE ONLY
10-1

One CE responsibility is to keep IBM informed of any
or systems in his or her territory. Discovery sheets
the most accurate way of obtaining the data needed to
with the necessary information to determine the effect
device on machine or system serviceability.

changes to the machines
(see sample sheet) are
provide Engineering
of that alteration or

The Branch Office then forwards this data to Boca Raton where a survey
package is developed. Boca Raton wi 11 determine whether the survey
package will be of verification or initial survey level. If this alteration/
attachment has been initially surveyed before, a verification survey takes
place to insure that this particular non-I BM device corresponds to the
original machine surveyed in respect to tie-ins, voltages, physical
location, etc. If this alteration/attachment has not been previously
surveyed, then vendor interface documentation and/or a physical
engineering inspection is required by Boca Raton in order to verify- that
the maintenance package has not been invalidated.
The customer wi 11 be notified of the survey results through the branch letter
and the Multiple Suppliers System Bulletin (see samples).

IBM INTERNAL USE ONLY

10-2

This is a sample non-IBM Alteration or Attachment discovery
sheet.
Your Field Manager will give you the actual one you
need along with the instructions and coding key.
This sample
is for your information only.

FIELD #1 - TRANSACTION CODE
circle One

Required Fields
1 , 3 , 4 , 5 , 6 , l 0 , 14 , 15 and
7, 11, 13 as applicable

1, 3, 4, 8, 9, 10 and 12, 13 as
applicable

1, 3, 4, 5, 6, 7
8 and 10 as applicable

GSD only:

1, 2 and changed fields
1, 2, 9 quantity equal zero

1, 3

FIELD #2

Record Number

FIELD #3

Type

FIELD #4

Manufacturer's Name Code

Serial
M/CD

Manufacturer's Name (Code 99 Only)
Marketing Name Code
FIELD #5

Alteration Change

FIELD #6

Alteration Date

FIELD #7

Alteration Description

FIELD #8

Device Function Code

FIELD #9

Quantity of Attachments now on
IBM Machine

MKTCD
ALT
ALT/DT
DESC
D/F/CD

QTY _ _I,_ _ ____.~---

FIELD #10

Serviced by Company Code

FIELD #11

IBM Equivalent Type

FIELD #12

IBM Equivalent Model

FIELD #13

Manufacturer's Type/Model

FIELD #14

IBM Memory Size

IMEM

FIELD #15

Non-IBM Memory Size

OMEM

IBM INTERNAL USE ONLY

10-3

SVC BY
ETYPE
EMOD

MTYP/IillOD

SAMPLE LETTER TO BE SENT TO CUSTOMER

IBM has inspected the following IBM machine which was altered to accommodate
the addition of a non-IBM alteration/attachment.
Date of
Inspection

Altered IBM Machine
Type & Serial

Non-IBM
Alteration/ Attachment

As a result of our inspection and subsequent evaluation of the effect of the
alteration on the maintainability of the above IBM machine, IBM will attempt
to maintain the unaltered portion of the machine in accordance with the
Maintenance Plan described in the IBM Multiple Supplier System Bulletin,
a copy of which is attached.

During our evaluation, however, we did note the following
service problems that concern us.
The above problems may at some time impair the IBM Customer
Engineer's ability to readily isolate malfunctions, thereby
extending machine downtime. Accordingly, any additional
time and material expended by IBM because of the aforementioned items, wi II be billed in accordance with our
standard practices regarding alterations and attachments as
described in the Multiple Supplier System Bulletin.

IBM assumes no responsibility for the diagnosis or maintenance of any alterations
or attachments to the IBM machine or for the compatibility of future changes to
such machine as may be provided by IBM.
Should you have questions concerning the inspection results or our Multiple
Supplier System Bulletin, please contact your Marketing Representative.

To be included only if maintenance limitations have been
identified in the ITPS wire from FE HQ specifying the
results of the IBM inspection.

GS Branch Manager
Attachment:
bee:

Multiple Supplier System Bulletin

CE Branch Manager

IBM INTERNAL USE ONLY
10-4

Field Engineering Division

Business Practices Manual

Page:
Date:
Revision:

B3.l

1/31/76
9

MULTIPLE SUPPLIER SYSTEM BULLETIN

International Business Machines Corporation / Armonk, New York 10504

---------------- - --- --- -= ==
5-::-5
: 5: : =';' =
®

Multiple Supplier System Bulletin
The purpose of this Bulletin is to define IBM's relationship with our customers and their other suppliers regarding systems
comprised of IBM equipment and that of other suppliers, or when an alteration is made to an IBM machine.

In Multiple Supplier Systems, IBM responsibility is limited to equipment marketed by IBM and to compatibility with
tariffed communication services provided by regulated common carriers and recommended by IBM for configuration of
IBM Teleprocessing systems.
Our experience with Multiple Supplier Systems has indicated that the variations and complexity of alterations to IBM
machines have increased our cost of providing maintenance service. These increased costs include diagnostic and repair
time identified at the time of service calls and installation time which results from alterations and attachments, the cost of
restoring altered rental machines being returned to IBM and the time and expense of inspection of altered machines to
determine the practicality and safety of maintenance. Charges to recover these additional costs are set forth in this Bulletin.
Upon request, we will meet with our customers and the other suppliers to achieve a common understanding of each party's
responsibility.

Definitions
A Multiple Supplier System is one which involves an alteration in an IBM machine or attachment of other suppliers' equipment to an IBM machine or system. An alteration is defined as any change to an IBM machine which deviates from IBM's
physical, mechanical or electrical machine design (including microcode) whether or not additional devices or parts are
required. An attachment is defined as the mechanical, electrical or electronic interconnection of non-IBM equipment
marketed by others to an IBM machine or system.

Maintenance Services
General
IBM provides maintenance service for equipment manufactured by, or for, IBM and marketed by IBM. It is impractical to train our Customer Engineers on a wide range of non-IBM equipment. In certain cases, upon request, IBM may
procure maintenance for specified supporting equipment such as motor generators, cooling systems or back-up power
supplies.
When an alteration in or attachment to an IBM machine or system (a) interferes with the normal and satisfactory
operation or maintenance of a machine in a manner which renders its maintenance and repair impractical for IBM's
personnel having had the standard training and instruction provided for such personnel, or (b) creates a safety
hazard, the Customer will be required in the case of a rental machine, upon written notice, to modify the alteration or
attachment to achieve a practical maintenance condition, to remove the alteration or attachment and restore the
machine or system to its normal and satisfactory operating condition or to purchase the machine and obtain maintenance from another source. In the case of a purchased machine, the Customer will be required, upon written notice,
to modify the alteration or attachment to achieve a practical maintenance condition or to remove the alteration or
attachment and return the machine to a practical maintenance condition as a requisite for continuation of IBM
warranty and mai~tenance service.

Inspection
Upon learning of an installed alteration, IBM will determine if maintenance or warranty service of the unaltered
(over)

G120-8648-8 (U/M-001)

IBM INTERNAL USE ONLY

10 ... s

Field Engineering Division
Business Practices Manual

Page:

Date:
Revision:

B3.2
1/31/76
9

MULTIPLE SUPPLIER SYSTEM BULLETIN

portion of the machine or system is practical and that no safety hazard has been created. If an inspection is required
to make this determination, the customer will be notified and an inspection date will be scheduled. The inspection of
an alteration is a requirement for our continuing service. Reconfiguration of an alteration may necessitate reinspection and reassessment of the maintenance status of the machine.
The initial inspection of a particular alteration may require an engineering analysis by IBM laboratory engineering
personnel. Other suppliers may request initial inspections of alterations to IBM machines at their manufacturing
facilities prior to installation at a customer location. Otherwise, the initial inspection will he performed at the
customer location. When the same alteration is made to another machine, an inspection will he performed at the
customer site by local IBM Field Engineering personnel to verify that the installation was accomplished in substantially the same manner as those previously inspected.
The customer is to make available to IBM, for such inspections, a description of all alterations. The description is to
include maintenance documentation and an identification of all modifications and displacements of IBM parts, wiring,
and microcode. In addition, all parts and wiring comprising the alteration shall be made clearly distinguishable to
IBM personnel by color coding and other appropriate means.

Maintenance Plan
When maintenance of the unaltered portion of a machine or system has been determined upon inspection by IBM to
he practical and no safety hazard has been created, IBM and customer responsibilities will be:
a) In servicing and maintaining the unaltered portion of a machine, our personnel will use the diagnostics, maintenance procedures, and other maintenance documentation normally supplied by IBM for the machine.
h) If in the course of a service call, IBM's diagnostic efforts indicate that the failure is located in the unaltered portion
of the machine, we will proceed to perform maintenance and repair.
If in attempting to service and maintain the unaltered portion of a machine, IBM is precluded from completing
normal diagnostic efforts and maintenance procedures as a result of interference by an alteration or attachment or
if IBM determines that the failure may he located in the alteration or attachment, IBM will notify the Customer
that he has the option either to cause the alteration or attachment to be disconnected or removed before IBM will
be obligated to proceed further, or to call upon the service organization responsible for maintaining the alteration
or attachment to proceed with diagnosis, maintenance and repair of the alteration or attachment. If the cause of
the failure cannot be determined by such service organization, IBM may require that the alteration or attachment
be disconnected or removed in order for IBM to complete maintenance and repair of the unaltered portion of the
machine.
c) Alteration in or attachment to equipment or changes in programming other than as provided by IBM may affect
the compatibility of IBM engineering changes, programs, features and model conversions. Customers may find it
necessary to re-establish a compatible interface to an alteration or attachment as a consequence of IBM modifications to equipment or programming or to avoid any adverse effect of such modifications on the performance of
the alteration or attachment. When an alteration or attachment interferes with installation of engineering changes,
model changes, programs or features provided by IBM, or with their maintenance or removal, IBM may require that
the alteration or attachment be removed as a condition of our completing installation, maintenance or removal.
d) In the event that an alteration or attachment impacts any maintenance dependency of one IBM machine upon any
other IBM machine, IBM's warranty and maintenance service may be adversely affected. In such situations, IBM
shall attempt to complete maintenance and repair in as timely and effective a manner as possible.
e) On occasion, IBM replaces a rental machine due to maintenance considerations. The customer is advised and provided the scheduled date of replacement. If st.JCh a machine contains an alteration, the customer will be responsible
for removing the alteration from the machine prior to replacement and for its reinstallation.
Restoration
The customer is responsible for the storage of any IBM parts removed as a result of alteration to an IBM rental machine
and for the reinstallation of th~ parts when the alteration is removed.
Prior to discontinuance of a rental machine or upon removal of an alteration from a rental machine, the customer will
be responsible for restoring the machine to its normal condition. When restoration is performed by other than IBM
personnel, an inspection will he scheduled following removal of an alteration to determine that proper restoration has
been completed, (e.g. all parts, wiring and microcode which were modified or displaced by the alteration have been

IBM INTERNAL USE ONLY

10-6

Field Engineering Division
Business Practices Manual
SUBJECT:

Page:
Date:
Revision:

B3.3
1/31/76
9

MULTIPLE SUPPLIER SYSTEM BULLETIN

reinstalled so that the machine is in normal condition). This inspection will he completed prior to discontinuance of
rental machines.
Upon customer removal of an alteration, purchased machines must he restored to a practical maintenance condition
if IBM warranty or maintenance service is to continue.

Charge&
Time and expenses incurred by IBM for diagnosis or repair of the unaltered portion of a machine attributable to an alteration or attachment; or for other IBM Field Engineering activities such as the installation, ma'intenance or removal of
engineering or model changes, programs or features with which the alteration or attachment interferes will he charged to
the customer at IBM's time and material rates and terms then in effect.
Time and expenses incurred by IBM in inspection or reinspection of altered machines or inspection of restored machines
will be charged to customers at IBM's rates and terms then in effect for participation of local Field Engineering personnel
and at applicable hourly rates and travel and living expenses for assistance from IBM laboratory engineering personnel
when required. Billable time for an inspection performed by IBM laboratory engineering personnel will be that time· at
the inspection site recorded to the nearest hour.
In addition to the charges described above, IBM may establish additional charges for maintenance service under existing
Agreements. Such charges could result if the cost of maintaining the unaltered portion of such machines is significantly
increased above the cost of maintaining similar machines which have not been altered. These charges would recover
additional costs such as those due to an increase in "no trouble found" and intermittent failure incidents, greater diagnostic
complexities and increased parts requirements.

Liability
IBM ~foes not assume liability for personal injury or property damage, including damage to IBM equipment, caused by
an alteration or attachment or service thereon. IBM does not assume liability for any damage occurring to an alteration
or attachment attributable to IBM's use of its standard maintenance and installation procedures.

Oiher Services
For systems in which IBM equipment is a significant part of the customer's installation, IBM may provide maintenance
coordination services on a fixed price contract basis. This service is designed to meet complex system requirements such
as common carrier and sensor-based installation coordination, problem determination for modems and instrumentation,
and common carrier and instrumentation stand-by assistance, and service coordination.

Patents
IBM's standard indemnification will apply to equipment manufactured and marketed by IBM. IBM does not assume
responsibility for the infringement of patents which relate to the combination of non-IBM equipment with IBM equipment
and programming. In those situations where IBM markets non-IBM equipment, IBM's indemnity to the customer is limited
to that which can be passed on as the result of the manufacturer's indemnity. This Bulletin does not imply the granting
of a license under any IBM patent.

General
IBM's maintenance of IBM equipment in Multiple Supplier Systems does not constitute endorsement of any alteration or
attachment.
Any questions concerning the provisions of this Bulletin should be directed to your IBM representative.

IBM INTERNAL USE ONLY

10-7

THIS PAGE INTENTIONALLY LEFT BLANK

IBM INTERNAL USE ONLY

10-8

MES

MES shipments from Boca Raton are discretely packaged by Bill of Material.
To insure that all parts required to install a feature or features shipped
on an MES are received, a complete understanding of this packaging is
required.
An MES may contain one or more feature B/M's. A feature 8/M can contain
one or more sub 8/M's. A sub 8/M is made up of parts and may also
contain additional 8/M's, commonly called "J" bills. See Figure 1.
"J" bills are packaged assemblies of parts such as logics, power supplies,
or assemblies and may be packaged separately but wi II have the "J 11 bi II
number written on the package.
Each feature B/M is assigned a bin number which is located in the
right-hand corner of the computerized 8/M I isting. See Figure 2.
parts included in this B/M have been assigned on the identification
attached to the part, and a job number. The last two digits of the
number are the same as the bin number.

upper
All
ticket
job

Each part included in the B/M will have the same job number and will be
packaged separately. The main B/M may not be packaged separately but
may be found loose in the main box of parts.
In some cases, when the B/M contains a small amount of parts, they may
be packaged in a large grey envelope with the 8/M number of bin number
written on the package.
To effectively inventory the MES from the computerized Bill of Material I ist,
an understanding of the codes used in the PL and CH columns is required.
See Figure 2.
RS D A PD XJ RR JA ID -

Reference material shipped
Detail part shipped, such as screw or fuse
Assembly shipped, such as MST or power supplies
Bulk item shipped, such as wire or tubing
Packaged group of parts, such as logics or panel assembly
Reference material not shipped
An as-required assembly shipped, such as a table top
Parts shipped to field (substitute) . See reference number
column for substitute part number
MD - Parts to be removed
MA - Assemblies to be removed
RM - Reference mater ia I to be removed

IBM INTERNAL USE ONLY
11-1

Service Aid 12 can be used as a guide to sequence the different B/M 's
that need to be installed.
Service Aid 13 gives a big picture view of the Channel Bank Cabling,
which should help understanding.
If parts are missing on an MES, the MES department in Rochester, MN
should be contacted:
First Shift
Off Hours

507-286-5382
8-456-5382
507-286-4011
8-456-4011

RCQ Code should be used for reporting MES defects by IR; also explain
all codes fully in description section (include B/M and/or part number
where applicable) .

IBM INTERNAL USE ONLY
11-2

STRUCTURE OF AN MES

MES
l

FEATURE

l
~

SUB
BILL
A

J
BILL
A

SUB
BILL
A

SUB
BILL
B

]

SUB
BILL

SUB
BILL
A

SUB
BILL
B

J
BILL
A

J
BILL
B

l
I

J
BILL
B

* "J"

Bills may call out further

"J"

Bills.

IBM INTERNAL USE ONLY
11-3

l
SUB
BILL

J
BILL
B

SUB
BILL
D

Boca Raton Job # 61547-065

MES Order Number -- 878601

March 19, 1974

B/M Number

Production Level

0664678

Bin # AF1D

Page

:l:

Title

-I

m
;;o

z
)>

l/)

m
0

$Field Install Chan 3
Sig. Cables 5555162
W/O BSCA-2 with ML TA
The following Class I
FIED items must be
packaged with the
B/M separately

***********************
P/N 0664454 lnstructio
Basic Name & Descr.
Instr 821718
FFB/M
Tubing Plastic
Strap Cable
Backplate
Plate Asm
Screw
Trough
Vertical
Horizontal
Trough
Cable Grp OlA-01 B

.a:::

R
p
L
A
A
A
A
A
A

s
D
D
D
A
D
D
D
J

Part No.

Qty.

Ref.#

0664454
1
0073430
11
2
0811427
01
20
01
0815215
0815224
01
1
01
2
2588874
2590010
01
2
2590011
01
1
01
5554871
Prod. Change Level 821718

FIGURE 2

Mfg
1 2 3

Oper

Dept

Mfg
4 5
R *

92E
92E
92E
92E
92E
92E
92E
92E

L
A
A
A
A
A
A

File

Open

Ins-Ext

SUPPORT STRUCTURE

With the transfer of the 5408 to Class II, 5415 B & C to Class II, 5415 A to
Class III on 7I1/ 77, the System/ 3 CPU family today has products in each of
the three service classes. This is an opportune time to review the function
of the System/ 3 FSC (Field Support Center) and the GSD technical support
structure as it applies to the individual classes and the many variations of
service class I/O attached to the System/ 3. This section will identify the
interface guidelines between the Field , the Field Support Center, and the
Product Service Planning Representative when ~ssistance is required.

On a Class I product, any CE can call the FSC (Field Support Center).
The only requirement, other than proper security, is that all on-site
documentation and RETAIN will have already been exhausted. Field
Support will then give Data Bank Search, technical direction and
guidance on the problem. (On Class II or III, the CE will use the
SSI (System Service Index) or equivalent (such as SIMS) , instead of
the FSC .)
If the problem is not resolved, the CE will call the BODS (Branch
Office Designated Support person) . If BODS and/ or RDS are unknown to
the CE, his or her Field Manager can provide the names of the personnel
currently with those levels of support. After the BODS has arrived on
site and exhausted all resources, the BODS may elect to call FSC on the
WATS line for Class I products or toll call Boca Raton for Class II products,
and talk to a Product SPR for indepth analysis and Engineering interface,
if necessary. (Class III products do not use Boca Raton Field Support for
technical assistance, but instead utilize interoffice support.)
If a Class I or II machine is still down after the Branch Office has exhausted
its resources, including all on site and Branch Office documentation, to the
best ability of the CE and the BODS , the branch should get an RDS (Region
Designated Support) on site. After the RDS arrives, he or she may call
FSC (Class I) , or toll call Boca Raton (Class II) and go into indepth
analysis with the Product SPR, and Engineering, if necessary.

I BM INTERNAL USE ONLY
12-1

If the problem still cannot be resolved remotely and Branch Office
requests on-site assistance, an SPR and/ or Engineer will go on site
to assist in problem resolution.
In summary, what Field Support asks of the Field is that, before
each step is taken, all prior resources should be- exhausted.
MIXED CLASSES
During problem determination, all assist calls involving mixed classes
of product support between the host system and the 1/0 units will
assume the CPU class for the entire system.
If problem determination places the trouble in the 1/0 unit, then its
class and support structure will be followed; otherwise, the CPU
support will be utilized.
SUMMARY
CLASS I
A.

Early Product Life

Direct Plant Support (FSC)

Support Structure
1.
2.
3.

4.
5.
6.

CE calls FSC for Data Bank Search and technical direction
BODS on site
BODS on site calls FSC for indepth and/or
Engineering interface
RDS on site
RDS on site calls FSC for indepth and/ or
Engineering interface
SPR and/ or Engineering on site

IBM INTERNAL USE ONLY

12-2

CLASS II
A.

Mid Product Life

Region

Support Structure
1.
2.
3.
4.
5.
6.
7.

Des~gnated

Support (RDS)

FSC closed - no WATS
CE uses SSI or equivalent
BODS on site
BODS on site toll calls Product SPR
RDS on site
RDS on site toll calls Product SPR for indepth
and/ or Engineering interface
SPR and/ or Engineering on site

CLASS III
A.

Late Product Life

Branch Office Self-Sufficiency (BODS)

Support Structure - Branch Office Responsibility

PRIOR TO ASSISTANCE CALL, CE SHOULD USE LOCAL RESOURCES
A.

MAPS

MLM's

RETAIN's

ETC.

IBM INTERNAL USE ONLY

12-3

RESPONSIBLE PLANTS
FOR
SYSTEM/3 AND 1/0 UNITS

TYPE
1017' 18
1255
1403-2,5
1403 Nl
1419
1442
2501
2560
327X
328X
3340
3344
3410, 3411
374X
5203
5404
5406
5408
5410
5412
5415A
5415B ,C ,D
5421
5422
5424
5444
5445
5447
5448
5471

CLASS
III
III
III
III
III
III
III
III
II
II
II
I
III
II
III
I
III
I
III
I
II
I
III
III
III
III
III
I
I
Ill

PLANT OF
MFG/FIELD SUPPORT
Raleigh
Endicott
Endicott
Endicott
Endicott
Rochester
Rochester
Rochester
Kingston
Kingston
San Jose
San Jose
San Jose
Rochester
Endicott
Boca Raton
Boca Raton
Boca Raton
Boca Raton
Boca Raton
Boca Raton
Boca Raton
Boca Raton
Rochester
Rochester
Rochester
San Jose
Boca Raton
Rochester
Boca Raton

IBM INTERNAL USE ONLY

12-4

PLANT OF
MES/MLC CONTROL
Raleigh
Endicott
Endicott
Endicott
Endicott
Rochester
Rochester
Rochester
Kingston
Kingston
San Jose
San Jose
San Jose
Rochester
Endicott
Rochester
Rochester
Rochester
Rochester
Rochester
Rochester
Rochester
Rochester
Rochester
Rochester
Rochester
San Jose
Rochester
Rochester
Rochester

10/13/76

Account

-I
m
:::0

>
r
c
V>
m
0

III

-<
II

SC
Technical
Direction/
Data Bank

System
Service
Index

c
Engineering
Phone Assist

B/O Support
BODS
on-site

Boca Raton
Product
SPR
Phone Assist

Inter-office
Support

egion
esignated
upport(RDS)
n-site

Field Support

Eng.
Phone Assist

N
I
U"I

Field Support
and/or
Engineer
on-site
*Toll Call - Not WATS

THIS PAGE INTENTIONALLY LEFT BLANK

IBM INTERNAL USE ONLY

12-6

S/3 SOFTWARE

System Programming
The purpose of this section is to acquaint hardware CEs with the very basic
programming structure of the System/3 Model 15. Emphasis will be placed
on those areas that can provide diagnostic information to both hardware and
software CEs in an effort to reduce problem determination time.
Three architectural characteristics of the System/ 3 Model 15 have created
areas that can require the joint effort of software and hardware CEs for
quick and efficient problem determination:
1.
2.
3.

l\·1ulti-programming environment
Hardware driven interrupts
Microcode IOS (Interface to Software)

The programming approach to this architecture has resulted in some confusion
on Process Check problem determination. Hardware malfunctions can create
Process Check conditions with software failure symptoms. We wi II examine
each of these areas and the respective symptoms that could be confusing from
a problem determination standpoint.

IBM INTERNAL USE ONLY
13-1

MAIN STORAGE ORGANIZATION

SUPERVISOR
-CONTROLS SYSTEM FUNCTIONS32K

---- - --------

IOS

- CONTROLS 1/0 OPERATIONS -

PARTITION 1
- USER TASK 48K

PARTITION 2
- USER TASK 48K

FIGURE 1

IBM INTERNAL USE ONLY
13-2

Multi-Programming
With the advent of multiple task System/ 3 Model 15, a more efficient method
of handling Process Check conditions became necessary. As many as sixteen
user tasks may be executing at any given time on a Model 15 using CCP.
The Process Check handler function was developed to intercept 'Process
Check' conditions and interrogate the type of failure. A decision is then
made as to whether a single partition user task under CCP, or the entire
system should be halted. The Process Check handler operates in interrupt
Level 7 of the system. If diagnosis of the error indicated that a single user
task or partition cannot be stopped to eliminate the error, an internal branch
to a X 1 00 1 OP Code is made. This action results in an invalid OP Process
Check (red light) and the interrupt Level 7 indicator on the console. This
symptom indicates only that a Process Check occurred and system integrity
could not be maintained. Information regarding the actual type of Process
Check and real system address associated with it are logged at address X 1 100 1 •
Figure 2 shows the content of the Process Check Address Register and Program
Status Register which are located at address X 1 100 1 • This information is
provided to stress the fact that console indications are not always valid for
software process checks and that a PSR should be involved for proper diagnosis.

IBM INTERNAL USE ONLY
13-3

PROGRAM CHECK INFORMATION

Displ

Label

X/0100'
X'OlOO'
X'0102'

PCSTAT
PCADRG
PCSTRG

X'0104'
X'0106'
X'0108 1
X'OlOA'
X'OlOC'
X'OlOE'

PCIAI
PCPMR
PCPSR
PCXR2
PCXRl
PCT CB

Lng in
bytes
0

2
2

2
2
2
2
2
2

Description
Program check information start
Program check address register
Program check status register
Byte 1
X'SO' = reserved
X' 40 1 = reserved
X'20' = Interrupt level ID (4 bit)
X'l O' = Interrupt level ID (2 bit)
X'08' = Interrupt level ID (1 bit)
X'04' = Any interrupt level
X'03' = Greater than 192K
X'02' = Greater than 64K
X'Ol' = Greater than 128K
Byte 2
X'SO' = Storage violation
X'40' = Invalid Q-byte
X'20' = Invalid Op code
X'lO' = Invalid address
X'08' = Privileged operation
X '07' = reserved
Interrupt level IAR
Interrupt level PMR
PSR
XR2
XRl
Address of associated TCB (if known)
FIGURE 2

IBM INTERNAL USE ONLY
13-4

Hardware Interrupts
Unexpected hardware interrupts on the System/ 3 Model 15 can also cause
system symptoms that appear to be software failures. At system generation
time a table is built for every device on the system. Each table contains
numerous elements which can represent a function for the device to perform
at execution time, when a function is requested of the device, the element is
plugged with the address of the requesting task and the address of the active
108 (Input/Output Block) . The requesting task may be a user program or
the system itself. The 108 contains a description of the function to be
performed. When the 510 is given to the device,. the 108 is put in the wait
state. When the OP END interrupt is received from the device, the active
108 is posted complete if the operation was successful.
In the case of the unexpected interrupt, no information has been plugged
into the table element. Upon receiving the interrupt, the interrupt handler
determines the device type and goes to the appropriate table to get the task
and 108 information. System programming will check for a valid 108 address
and, if none is present, will force a processor check. The PSR can determine
the device that caused the unexpected interrupt.
The programming system trace program is the best tool available for diagnostic
aid when this type of failure is suspected. An OP END interrupt will be
logged from the device without a corresponding SIO.
Microcode and IOS Interface
As 1/0 devices have become faster and more sophisticated, microcode has come
into widespread use as a communication interface between system programming
and 1/0 devices. The major impact from a microcode failure is the inability
of IOS to communicate with the device. For the purpose of this discussion,
we wi II Iimit our discussion to the 3340 microcode and corresponding disk
IOS ($@DE33).
When device errors occur, IOS can retry the operation and assuming successful completion, continue on. When an adapter check occurs, IOS can force a
reload of the microcode (soft-I PL) and continue on. If the error persists
after three retrys, 105 will cause a branch to a X'OO' OP Code and force a
process check. This will result in a red light indication and the interrupt
Level 7 light on the console.

IBM INTERNAL USE ONLY
13-5

Disk 105 contains an area called the 3340 IOS queue that can provide important
information to the hardware CE on both device and adapter problems. A PSR
will be needed to locate the appropriate queue and extract the information from
the memory dump. Figure 2 shows a physical layout of the 3340 IOS queue
with appropriate description of content. Sense information, which should be
of prime concern to the hardware CE is located at displacements A, 8, C, D and
36.
Sense bytes O and 1 are updated on every instruction to the device. Sense
bytes 2 and 3 are only updated on an adapter check. The 24 bytes of sense
information at displacement 24 are updated by a diagnostic sense instruction
which is performed for all temporary and permanent errors.
The information contained in the IOS queue can be used with halts and
messages as well as process checks. Figure 3 contains a list of halts
and messages issued by 3340 IOS. A brief description of each halt is
given as well as the most probable cause (hardware (H) and software (S)) .

IBM INTERNAL USE ONLY
13-6

3340 Disk IOS Queues
There is one 78-byte queue for each 3340 disk drive on the system. A
pointer in SYSCOM points to the first queue. The queues are chained
together.

Displ
0
0

4E
9C
EA

Label
010002
QX1
QX2
QX3
QX4

Lng in
bytes
0

78
78
78
78

Description
Start of 3340 queues
Queue for 01
Queue for 02
Queue for 03
Queue for 04

***************Format of each 78-byte queue**************
0

QFIRST

QLAST

2
4

QCHR

A
B

QSNS2
QSNS3
QSMSO
QSNS1
NXTQUE
LAST SK
PHYS CS
SAVEOP
QSTATS
INT45
ADHA

2
2

ADRO

HAFLD
ROFLD
DFCA45
DGSNS

5
9

c
D
E
10
11
13

15
16

28
34
36

2
1
2
2
1

Address of first element in IOQE
table for this drive
Address of last element in IOQE
table for this drive
reserved
La st cylinder head accessed for seek
operation
Sense byte 2
Sense byte 3
Sense byte 0
Sense byte
Address of next 3340 IOS queue
Logical cylinder number of last seek
Physical C/H
SAVE AREA FOR Q/R during verify
Status of drive
Interrupt status
Address of home address save area
(HAFLD1)
Address of record 0 save
area (ROFLD 1)
Home address save area
Record 0 save area
Address of record 0 count field (COUNTx)
Diagnostic sense save area (DGSNSx)
FIGURE 2

I BM INTERNAL USE ONLY
13-7

Disk Errors

Stic-Lite

Error Description

HE
Blank 0

Permanent Disk Error
Attempt to IPL from a non-system
D1 is in read only mode; adapter
on 3340 attempting to run CEFS
Permanent disk error; an attempt
load a system program that is not
the IPL pack

Blank 1

Responsibility*
(H,S)
pack;
check

to
on

H,S

Message
OA--

oc--

OF
OH
OJ
OL
ON

Wrong data module size
Write inhibited
Intervention (not ready)
Equipment check
Permanent Error during error
logging
(Not properly initialized)
(Hardware failure)
Seek Check
Command reject
Invalid track format
Data check
No record found/ end of pack
Data overrun/command overrun

u
u

u
H

u
u
H

H
S,H
H,S
CH ,S)
S,H
H

Responsibility*
*H = Hardware
S = Software
U = User
Where H and S appear together, the code specified first is most probable.
When they appear in parenthesis, neither takes precedence.
FIGURE 3

IBM INTERNAL USE ONLY
13-8

HOW IS THE CCP RELATED TO DISK SYSTEM MANAGEMENT

The communications control program operates under control of disk system management. Your telecommunications application programs are under control of the communications control program (Figure 2). Your programs issue requests for services.
The requests are received by the communications control program. Some of these
services are performed by the CCP itself, such as communications 1/0. Other
service requests are passed on by the CCP to disk system management.

Program Level (Partition) 1

User application program

Communication Control
Program under control of
S/3 Disk System Mgmt.
User
Prog.

User
Prog.

User application programs
running under CCP

Program Level· (Partition) 2

Figure 2.

Communications Control Program (CCP)
The maximum partition size in a Model 15 system that does
not use CCP is 48K. The CCP partition can be greater than
48K, but any program in the CCP partition is limited to 32K
bytes.
IBM INTERNAL USE ONLY
13-9

OCL - OPERATION CONTROL LANGUAGE

OCL is primarily used to load and execute programs. It may also be used
to control system resources and initialize the system; such as a "reader"
statement in changing the sysin device or a "date" statement to set the
system date. The applicable model System/3 OCL reference manual contains
an explanation of each OCL statement and its placement in the OCL stream.
The reference manual also explains how to use all of the system services
programs ($MAINT, $COPY, $1NIT, etc.) and the functions they perform
and gives examples of the OCL and control statements necessary to perform
their various functions. Additionally, the customer should be thoroughly
familiar with the use of OCL.
System services programs that might be used to gather APAR or problem
determination information:
- $MAINT - Copy the user's program to cards - any function involving
the use of libraries.
- $COPY -

Copy data files to card or diskette.

- $LABEL - Take a VTOC to determine where files are located on a pack.

IBM INTERNAL USE ONLY
13-10

SYSGEN

System generation builds a supervisor and provides the supporting data
management modules and program products for a specific customer
environment.
The system generation reference manuals for the respective system types
explain all of the parameters and procedures used to perform a sysgen.
Additionally, if your customer will be a CCP user, the CCP Systems
Reference Manual for the appropriate system type, in the chapter entitled
"Generation Stage" lists some prerequisites and assumptions for doing a
CCP generation that wi II have to be considered during SCP generation.
Generally, these are the considerations:
must have the Overlay Linkage Editor - all systems.
System must have the Macro Processor - a 11 except Mod 4
System must have MLMP or MLTA program support - all except
Mod 4
Must know number of user tasks to run under CCP - Mod 15
$DBSC (Mod 15 - Line B promt) generation statement
$DMLP (Mod 15 - MLMPS prompt) generation statement
TIMER prompt if interval polling will be supported by CCP - Mod 15
Syst~m

Before you begin a sysgen, have the customer back-up his system. Find
out if the customer has other than a standard chain on his line printer.
If so, you willl have to submit an image statement as the initial step of
the generation process. The procedure for doing this can be found in
the applicable system operators guide.
It is the customer's responsibility to know what options he wants at sysgen
time. If you find yourself in a bind, ask the customer for the I isting of his
last sysgen and use it as a guideline. Also, ask him if any of the options
should change from his previous sysgen. The CPU usage meter should
be in CE mode when doing an SCP generation; however, for the installation of program products it should not be.

IBM INTERNAL USE ONLY
13-11

SERVICE AID PROGRAMS AND THEIR USES

The purpose for and how to use these service aid programs can be found
in the applicable handbook. The text that follows is a general guideline.
(Warning - Whenever working with customer data, it is advisable to have
it backed-up!)
CEFE -

Used by all systems for core and disk dumps. Additionally,
for Model 10 or Model 12 can be used for tape and 5445/ 3340
main data area dumps. MUST IPL after use.

$DUMP - (Disk and Tape Dump Program) - Used by Models 12 and 15
for disk and tape dumps. Loads as a user task.
$BUILD - (Alternate Track Rebuild Program) - This is a customer program.
The procedures for using it can be found in the applicable
OCL manual. By substituting the word "Patch" for the word
"Rebuild", data can be replaced on disk (including cylinder O).
$$DISK - (Disk Rebuild Program) - Used by Models 12 and 15 to verify
and replace any disk data. Loads as a user task.
$TRACE - (Interrupt Trace Program) - Used to trace any and al I interrupts
on the Model 15. Trace table can be written to disk. Will
record SIO and OPEND interrupts for 1/0 devices.
BSCA
Trace -

Records BSCA 1/0 operations on all system types. Shows the
SIO Q and R bytes, sense bytes, and the bytes addressed by
CAR, TAR and SAR. (BSCAR = Bi-sync Current Address
Register, BSTAR = Bi-sync Transition Address Register,
BSSAR = Bi-sync Stop Address Register) .

$$FTRC - (RIB/IOB Trace) - Records branches to the supervisor for
1/0 functions and prints the contents of the IOB.

IBM INTERNAL USE ONLY
13-12

APAR-AUTHORIZED PROGRAM ANALYSIS REPORT

This is the document used to notify the Central Programming Service Group that
a possible defect has been diagnosed in an IBM program or a component that is
the responsibility of the group. It is generally completed by the PSCE but can be
prepared by the SE or the customer.

Problem Resolution Via The APAR
1.

PSR verifies unreported defect in IBM programming; fills out APAR and
contacts Field Support to get a pre-screening number; mails APAR and
supporting documentation to development group location.

APAR coordinator logs in APAR; sends to responsible development group;
advises submittor that APAR has been received; enters APAR into RETAIN
370. (APAR has an 'active' status)

Developer answers APAR and sends resolution to APAR coordinator.

APAR coordinator advises submittor of resolution and enters resolution
on R370. (APAR has 'closed' status)

SPR creates a PIN from APAR text and developer's conclusion, advising the
field of the problem via R370; requests a PTF, if necessary, and advises
the field of the request.

Developer builds the PTF.

PTF coordinator sends the PTF to the submittor and to PIO for distribution
to the field.

SPR announces the availability of the PTF to the field via R370; enters
'patch' type PTF text on R370.

IBM INTERNAL USE ONLY
13-13

INSTRUCTIONS
A.

The APAR form must be used to report program problems found in
IBM programs having service classification "A" or "B".
Note:

Customers may ignore all instructions in italics.

Before submitting as APAR, the maintenance information
documents should be consulted. These include PSM 's Early
Warning System, RETAIN, SECOM, and the material released
with the program from PIO.

Field Engineering Area Support must be consulted, subject
to locally accepted procedures, prior to the actual submission
of an APAR for problems associated with programs having
service classification "A".

Each problem identified must be reported on a separate APAR
form.

Send APAR and the supporting documentation to the location
responsible for that program as given in PS General Information
Booklet Form G229-2228.

For programs having Service Classification 11 8 11 consult the
documentation associated with the program to find the address
of the responsible APAR Processing Center.

Keep them together by affixing the envelope containing the
APAR to the package containing the supporting documentation.

When the APAR is received by the responsible location, it
wi II be numbered and an acknowledgement returned indicating
the assigned APAR number. Any additional information or
correspondence on the APAR should reference the number.

The following FE and DP documents contain GENERAL APAR
INFORMATION:
1.
2.
3.

Branch Office Manual
Sales Manual
Programming Systems Memoranda

The PSM General No. 4 must be consulted for information necessary
to submit an APAR on programs with service classification of "A".
If necessary, contact your local marketing representative for information
necessary to submit an APAR on programs having service classification

"B".
IBM INTERNAL USE ONLY
13-14

INSTRUCTIONS
C.

Severity Code
APAR 's for programs having service classification
the severity code section.

8 11 will not include

The severity assigned to the APAR must reflect the impact of the
problem against the total programming system or instal la ti on. See
PSM General No. 4 for definition of severity codes. Class "A"
program severity code one APAR's should not be submitted without
prior contact through FE Area and FE Technical Operations.
D.

All the following sections of the form should be completed before the
APAR wi 11 be processed:
1.
2.
3.

4.
5.
6.

7.
8.

9.
10.

Customer Name - A
Customer l'Jumber - B
Date - J
Operating Environment - L
Program ID and Change Level - N
Abstract - T
Symptom - R
Failure Keyword - s
FE Area and Branch Office - E
Severity Codes - K

Al I problems associated with SCP's or programs with service
classification "A" must be described and submitted in a manner
which allows testing and repair to be made on an unmodified
IBM program.

Care should be taken by the APAR submitter to insure that the
customer is aware of the support material being submitted. Use
of data or programs which contain sensitive customer information
should be avoided by substituting sample data which produces the
same error symptoms.

APAR 's are not to be used for comments, suggestions, or improvements.
The Product and Support Requirements Request, form ZZ29-1702, should
be used and submitted through DPD Systems Engineering or Marketing.

IBM INTERNAL USE ONLY
13-15

IBM

AU I HUKILt.U t-'KU\.lKAM ANALT~I~ t(t.t"Vt( I

APAR

PREASSIGNED
®CUSTOMER NAME

l(B}

ABC Company

CUSTOMER NO.

1 2

i olo

3 4 5

©CUSTOMER MAI LI NG ADDRESS

1234 Freemont Road
Anywhere, Ohio

AP1R SUBMllTTED

MO.

DA y

® SEVERIT'(
1
CODE

APAR

y R.

2 3 4

lsToR~E

CPU

7HJ1 ~

APAR IDENTITY

ASSIGNED BY APAR CONTRC
1

@OPERATING
ENVIRONMENT

12345

SERIAL No.J

CCP

s1zEI

s~s~

SYS. IN

RES.

5415

5424

SYS. OUT

1403

COMPONENTS OR PROGRAM IN ERROR/SUSPECTED
PROGRAM IDENTITY AND CHANGE LEVEL

IBM REPRESENTATIVE-NAME AND ADDRESS

Joe Doe

Comp't ID Ntfmber

sI110141- S C I

]EMPLOYEE SERIAL

@)NAME

654321

K_Pj

MAILING ADDRESS

9876 Springfield Road
Anywhere, Ohio

Comp'~

dp s 1o o}s] o]
0

MATERIAL SUBMITTED WITH APAR

STORAGE DUMP

CONTROL CARDS/JCL

STORAGE MAP

CONSOLE LOG

TAPE DUMP

CONSOLE CONDITIONS

DASO DUMP/Q

SYSTEM LOG

t----

12345

Lev. SCP-CSP Lev.

1---

~
t----

t----

FE AREA

110

2 14
@ITPS

BRANCH [F}
OFF. NO.
NO.

~~PTOM

MlsV

FAILURE KEYWORD

G
E

(!}ABSTRACT

4 1 1

PROGRAM LISTI NG

DIAGNOSTIC OUTPUT

t---

Assignment Set
History
Trace-CCP, BSCA

@RE-IPL REQ.

- 0

c c

NA M E

TEST DATA

OTHER:

614-225-7354, 8-657-7354

SYSTEM OUTPUT

OBJECT DECK/TAPE

1---

IIl

SOURCE DECK/TAPE

1---

WORLD TRADE COUNTRY
NAME

CODE@ IBM-BRANCH OFF. PHONE

COLS

REGRESSION

M s G

T 0

s E

1---

@SPECIAL
ACTIVITIES

N ~

t---

USERS ROUTINE

1---

TP CONF. LIST

@RASAR

PRE-SCREENING

[Xj

4 1 1

t----

PTF LIST

- 0

T E R Ml

S I N

N A L

1030229
Is y M B 0 LT I

M si G

Error description text-Note variations between expected and actual output-differences from previous successful runs-suspected problem area-verify EC level as adequate for program (PSM)-special configuration, teleprocessing, 1/0 switching, multi-systems, etc.
Identify any bypass, circumvention, or relief given.

Sending Msg to terminal using symbolic name
Example:

MODATOl, sign on control, causes error msg "CCP U-1 411

011tp11t error-08 on

00 111

IBM INTERNAL USE ONLY
13-16
DISTRIBUTION:

PAGE

1,2 ..... APAR PROCESSING
4 ..... ORIGINATOR
3 ..... APAR PROCESSING/OR AS
DIRECTED IN PSM GEN=4

OF~~-

Submitters Name (print) and Signature

li:JcV\_ 4J ~/~ IL~/\_,

Don Douglas Thompson

ORIGINATOR IS
FE

CUST OTHER

lcsoi

PTF APPLICATION
1.

The "module replacement" PTF uses the Library Maintenance Program
($MAI NT) to replace complete modules in the Object (0) and Routine
(R) Libraries. Object Iibrary module PTFs will not necessitate
a new sysgen, link, or recompilation of user programs. Routine
I ibrary module PTFs wi 11.

The "Patch" PTF uses the PTF programs $SGPTF, $SGPVR, $SGPTR
to alter or "patch" hexadecimal code within a module. $SGPTF
patches Object library modules and is the most commonly used.
$SGPVR and $SGPTR patch Iink-edited subroutines and routines from
the Routine Library, respectively. $SGPTR patches wi II necessitate
sysgens, or links, or recompilations.

The "modify" PTF uses $MAINT to modify source library macros
for CCP. These PTFs wi II require a new CCP sysgen or link-edit.
A "modify" PTF must not be applied twice. Special instructions on
the PTF cover letter, the RETAIN 370 pin that announces the PTF and
the RETAIN 370 PTF cross reference list will advise of the necessity
of sysgens, re-links, or recompilations.

Generally, to apply PTFs:
1.

Mount the PIO pack on Rl.

Remove the PIO header card from the PTF. If present, this will
be the first card on the deck and wi II have "PIDl HOR" in the first
seven columns.

Having IPL 1d from Fl, load the PTF deck into the reader and make
the reader ready.

Start the system and the PTF will be applied.

These procedures will have to be modified for cardless systems.

In addition to the above formal PTF programs, $SGFIX may be used to patch
0-1 ibrary modules, including user programs, until a formal PTF is available.
It may also be used to apply diagnostic traps for problem determination.

IBM INTERNAL USE ONLY
13-17

Determining What PTFs are Applied to a System
Cyl 0, Sector 47 (decimal) of a 5444 or 3340 simulation area is the PTF
logging sector.
For models 12 and 15, $SGLOG, the PTF Logging Program can be run.
It will I ist the names of all modules that have a PTF applied and the log
number of the PTF.
For the other System/ 3 Models, CEFE can be used to dump the PTF logging
sector. Instructions for using CEFE and $SGLOG are in the appropriate
handbooks.
// Load $SGLOG, R1
11 Run
// PTFLIST UNIT-R1
// PTFLIST UNIT-F1
// END
This procedure may be used on the Models 12 and 15 to determine what
PTFs are on the disk pack on R1 or F1. Only one "// PTFLIST" statement
need be supplied. More can be supplied.
To use CEFE to dump the PTF logging sectors for Models 4, 6, 8 and 10:
1.

Make sure the system is at EJ.

Verify this with the customer.

Press console stop.

Set the address/data switches to CEFE

Press System Reset; Press start; 50 wi II be displayed in the console
stick I ights.

Set rightmost address/data switch to 2; press start; a halt code of
55 will be displayed in the stick lights.

6.'

Set the address data switches to OODC for R1, OODD for F1; press
start; a halt code of ES is displayed.

Set the address/data switches to the same value as in step 6 and press
start. The PTF logging sector will be printed.

The switches may be set to OODE and OODF to dump the PTF logging
sector for R2 and F2, respectively.

The system wi II have to be IPL'd before the customer can use it again.
IBM INTERNAL USE ONLY
13-18

Additionally, to determine what PTFs have been applied to source macros
used for CCP, the fol lowing procedure may be used to print macro
$EOOO from the CCP PIO pack.

11 Load $MAINT, Fl
II Run
I I Copy From-xx, To-Print, Library-S, RETAIN-P, Name-$EOOO
II End
(where xx is the drive that contains the CCP PIO Pack Rl, Fl,
R2, F2.)
Near the bottom of the listing of macro $EOOO will be a list of all the CCP
source module PTFs.

IBM INTERNAL USE ONLY
13-19

Device Counter Logout Program
The primary purpose of the Device Counter Logout program is to report
information about errors that were recorded during execution of a binary
synchronous communications (BSC) program that contained the programming
support to update these counters. You should run the Device Counter Logout
program immediately after every such BSC program.
The Device Counter Logout program prints the counters for adapter 1 (and
adapter 2 if available on the system). The contents of the terminal statistics table, ML TERFIL, which is a permanent file on Fl and contains counters
for multipoint control stations only, is printed following the counters. If
MLTERFIL does not contain any entries for an adapter, the following message
is printed in place of the contents of MLTERFIL:
TERMINAL STATISTICS TABLE (MLTERFIL) EMPTY
If ML TERFIL does not exist, the following message is printed:
TERMINAL STATISTICS TABLE (ML TERFIL) NOT FOUND
Adapter 2 information is printed on a separate page.
The contents of the counters will be displayed on the device assigned as the
system LOG.
Operating Procedure
1.

Place the following OCL cards in the card reader:
1403
3284

11 LOG

{ CONSOLE

11 LOAD $$BSDL, Fl (Use Rl if your system pack is mounted there.)

II RUN
2.

Start the card reader.

Ready the system LOG device.

Start the partition.
following format:

The device counters wi II be printed in the

IBM INTERNAL USE ONLY
13-20

BSCA LOG rcun/dd/yy

ADAPTER

Identifies adapter being used.

ADAPTER 1

**************************** ******** ********
COUNTER DESCRIPTION

TOTAL

LAST JOB

**************************** ******** ********
TEXT BLOCKS SENT
TEXT BLOCKS RECEIVED
NAKS RECEIVED
DATA CHECKS
FORWARD ABORTS
ABORTS
ADAPTER CHECKS ON TRANSMIT
ADAPTER CHECKS ON RECEIVE
INVALID REPLIES
ENQS RECEIVED
LOST DATA COUNT
DISCONNECT TIMEOUTS
TIMEOUTS DURING RECEIVE DATA

nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn

**************

TERMINAL
ADDRESS

UNSUCCESSFUL
I/O OPERATIONS

1/0

**************
Address
Address
Address
Address
Address
Address
Address
Address
Address
Address

SUCCESSFUL
OPERATIONS

**************

******'********

nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn

1
2
3
4
5
6
7
8
9

TEXT BLOCKS Number of blocks of data transmitted
SENT
successfully from this terminal to a remote terminal.
TEXT BLOCKS Number of blocks of data received sucRECEIVED
cessfully by this terminal from a remote
terminal.
NAKS
RECEIVED

Number of negative responses received by
by this terminal in response to data transmitted by this terminal.

DATA
CHECKS

Number of text blocks received with invalid error check bits.

FORWARD
ABORTS

Number of times a remote terminal has
terminated transmission abnormally
while transmitting data.

ABORTS

Number of times a remote terminal has
terminated transmission abnormally while
receiving data.

ADAPTER
CHECKS ON
TRANSMIT

Number of times the following errors
occurred while the terminal was transmitting data:
1. Parity check within the adapter.
2. Cycle steal overrun.
3. Local store register or control register
check.

ADAPTER
CHECKS ON
RECEIVE

Number of times the following errors
occurred while the terminal was receiving
data:
1. Parity check within the adapter.
2. Cycle steal overrun.
3. Local store register or control register
check.

INVALID
REPLIES

Number of abnormal responses (including
no responses) from the remote terminal.

ENO'S
RECEIVED

Number of requests for retransmission of
this terminal's last acknowledgement after
the acknowledgement has already been
sent.

LOST DATA
COUNT

Number of text blocks received which do
not fit into the receive area.

DISCONNECT
TIMEOUTS

Number of times the data set has dropped
ready status after that status was set on.

TIMEOUTS
DURING
RECEIVE
DATA

Number of times this terminal expected
to receive text but did not receive anything for 3.25 seconds.

ADAPTER 2

**************************** ******** ********
COUNTER DESCRIPTION

TOTAL

LAST JOB

nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn
nnnn

**************

TERMINAL
ADDRESS

UNSUCCESSFUL
I/O OPERATIONS

SUCCESSFUL
I/O OPERATIONS

**************

nnnn.

nnnn

Address 1

The entries have the following meaning:
BSCA LOG

Heading to identify the printout.

mm/dd/yy

Date stored in the system communication
area.

Object Program Execution

IBM INTERNAL USE ONLY
13-21

193

GLOSSARY

Abend
Abnormal termination of a task - may or may not be associated with an
error message.
Alteration
An alteration is any change to the logic (code) of an IBM Program - Class
A, B or C Program Product or System Control Programming. An alteration
may be as small as one bit or as large as a module or more.
APAR
The standard document used to notify the Central PKogramming Group that
a possible defect has been diagnosed in a program with Central Programming
Service.
Assembler
A program to convert a single mnemonic instruction into a single machine
instruction. The mnemonic language is a programmer's "short-hand" that
allows human memory association with the actual machine operation.
Background Job
A job that is processed in a partition or region other than the one associated
with the input/output unit that was used to define this job.
Back Level
See 'Current Level'.
Basic Record
An entry on R/370 for a System/3 programming system that contains
documentation order numbers, pointers to the PTF cross reference lists
PINS, program service numbers, pointers to service aids, etc.
Batch Processing
The execution of a sequence of programs such that each is completed before
the next program of the sequence is started.
BCD
Binary Coded Decimal. The six bit code (plus parity bit) used to represent
data in most CPUs prior to System 360, as well as many 1/0 devices.
IBM INTERNAL USE ONLY
13-22

GLOSSARY
Beta Test
This has been replaced by Development and System Test. These tests are
done to ensure that the program meets the committed specifications and that
the customer can install and use it. Following the successful completion of
System Test, the supporting documentation is published and all of the program
material is sent to PID for distribution to customers.
Bypass
Used interchangeably with Circumvention.

One logical unit of information as used internally in System/360. It consists
of eight bits, each carrying a weight of 0 or 1, and has a possibility of 256
combinations that represent various numbers, characters, and special symbols
when translated by the EBCDIC Table. The eight bits may also be used in
pure binary form for numeric data or in a packed decimal form that permits
efficient use of core storage and other storage media.
CCP (Communications Control Program)
CCP is a feature of System/ 3 DSM (Disk System Management) that operates
in conjunction with MLMP and/or ML TA IOCS to control a communications
based operating system.
Central Programming Services
Refers to the various SDD, GSD or DP Support groups that have the responsibi Iity for providing answers to APARs and supplying corrections as required.
Checkpoint
A predetermined point within a job step at which the system records on

external storage all information necessary to restart from that point.
Circumvention
The process of getting a customer around a programming systems problem
by varying the input. This normally consists of a change in the source or
control statements involved with the problem program, eg; a variation in the
type or oder of the input statements to a compiler, a change to a job control
card, a change to a Sort/Merge control statement, etc.

IBM INTERNAL USE ONLY
13-23

GLOSSARY

COBOL
Common Business Oriented Language - A compiler based on the English
language. The structure of the language has been described and specified
by a committee consisting of representatives of the users and manufacturers
of Data Processing Systems. The advantages of COBOL are that it is easy
to learn and to write, and that COBOL programs are self-documenting in that
the compiler listing is easily read and the logic of the program is easy to
comprehend. COBOL compilers are available for most general purpose
computers in use today.
Compiler
A program that converts a programmer's directive and descriptive statements
into machine language instructions. The statements may be English format
(COBOL) or mathematic notation with descriptive words and symbols (FORTRAN).
The compiler takes the meaning of a statement, associating this meaning with
the 1/0 devices and data as also described within the program, and generates
the necessary instructions to be executed by a system to accomplish the
programmer's intention.
Component
Used to indicate a program that is a complete, uniquely functioning part of a
programming system. An example would be any compiler, Sort/Merge, etc.
program that is supported by an operating system. Components are generally
dependent upon a particular programming system for access and 1/0 support
and are not universal. For instance, System/3 Model 15 RPG II wi II not
execute in a Model 10 environment.
CPU
Central Processing Unit - Refers, in common usage, to that unit generally
called a "Computer". It can be in one "box" in a small system or it may
be made up of a number of "boxes" in a large system. Regardless of how
it is packaged, it consists of Main Storage (Core, in most systems),
Auxiliary Storage (Core and various other devices), and Arithmetic and
Logical Unit, Input/Output Interface (or channels), a unit to sequence and
control the internal operations, and a provision for external operator control
of the entire system. The CPU does not (except in the smallest systems)
contain the necessary control units to operate the variety of 1/0 device types
that may be attached.

IBM INTERNAL USE ONLY
13-24

GLOSSARY
Current Level
A program release is called the current level from the announced day of
availability until a specific number of days after the availability of the
next release. The overlap provides a buffer period for the user to update
at his convenience. The overlap period is generally three months
(System/ 32-System/7); but there are exceptions (System/ 3 - four months) .
Back level (CSP) or non-current level (SCP) refers to any release after
its overlap period has expired. The terms 'level', 'release', 'version',
are used somewhat interchangeably, in the context of Current, Non-current
or Back Level/Release/Version, in various IBM literature. (See note at
end of Section I, IBM Programming, Service Class "C".)
Data Servicer
Any IBM system user who provides data processing services on a fee basis
(whether such services are the primary, or merely an adjunctive function
of the organization) .
Defect
A defect in an IBM program is any deviation from the published specifications
for the program. It can be a source code error, an error in the documentation, a logical error or failure to follow interfaces and conventions regarding
use by or with other programs.
Dial-up
A term that refers to the use of a dial or push-button telephone to initiate a
station-to-station connection with a computer from a terminal.
DSM (Disk Systems Management)
Those control programs and routines that supervise the operations of an I BM
System/ 3. DSM is sometimes used interchangeably with SCP (System Control
Program).
EWS
Early Warning System - The portion of the RETAIN Data File reformatted and
printed on microfiche and available for general distribution. See PSM General
#6.
FE Service Number
Used on the IR or PSAR to identify the program worked on. It is a seven
digit non-alpha (to satisfy optical scanning requirements) number consisting
of a three digit base and a four digit component. A cross-reference between
FE Service Number and PIO Program IDs is included in Programming Systems
General Information Handbook, Form No. ZZ25-0511.
IBM INTERNAL USE ONLY
13-25

GLOSSARY

Foreground Job
A job that is processed in a partition or region associated with the input/
output unit from which the job was defined, thus preventing the input/output
unit from being used to define another job unti I processing of the current
job has been completed.
FORTRAN
A compiler based on mathematical notation. The language was originally
conceived and developed by an IBM employee. It has achieved universal
acceptance among mathematica I and scientific users of IBM Data Processing
Systems. The programmer learns a "shorthand" notation for mathematical
expressions and symbolic terms for control of the system devices that
~permit complex arithmetic problems to be written and solved quickly and
easily.
Hardware
The Processing System, including all of the local or remote attachments and
all of the necessary interconnections.
IOB (Input/Output Block)
The interface between the I/0 device and System/ 3 contro~ programming.
Shows current 1/0 operation and points to data buffer.
Instruction
The single step direction to the hardware, stored temporarily in the CPU
memory, that causes it to perform an exp Iicit function. Instructions ca use
data manipulation, arithmetic functions, logical alteration, input/output
operation, CPU mode changes (for instance, 360 to 1401 compatibility),
and various special hardware functions.
Interim Support
A program normally written by DP to do a function, or support hardware,
prior to and while waiting for the formal programming package to do that
job.
IVP
Installation Verification Program.
Job
A unit of work for the system from the standpoint of installation accounting
and control. A job consists of one or more job steps.
IBM INTERNAL USE ONLY
13-26

GLOSSARY

Leased Line
A permanent communication connection between a terminal and the terminal
control unit. No dialing is required to establish the connection.
Local Fix
A locally developed change to the logic of a program in an attempt to cause
it to perform in accordance to the design specifications of the program.
Local fixes to program defects are considered emergency temporary corrections
made by IBM support personnel. They are not considered alterations and are
supported by IBM until a formal PTF or support release is available from IBM.
A local fix should be attempted only after a Severity Code 1 APAR is submitted
and it has been determined that a circumvention is not feasible.
Localize
The goal of the diagnostic activity performed during "Problem Determination"
that enables the CE or PS Rep to make an educated guess as to what hardware units or programs are failing.
LSU
Language Sorts and Utilities - Another term for Program Products.
Macro
An assembler language function that vastly increases the power and utility
of the assembler. It provides the insertion of repetitious groups of
instructions with the ability to modify the groups depending on Macro
Internal instructions that are controlled by parameters specified by the
programmer when he writes the Macro operation code into his source
program.

IBM INTERNAL USE ONLY
13-27

GLOSSARY

Module
Term describing a group of programmed instructions that are accessed and
executed as an entity to perform some function within the overall scope of
the total program. A program may consist of one or many modules, depending
upon size and flexibility of the main program. The modular structure permits
many programmers to write the actual coding of a program, only requiring
that each programmer observe a "common interface", or rules, that describe
how the main program will pass data to and from modules and how the main
program wi II "cal 111 or access the module to be executed and how the module
will indicate that it is finished, passing control back to the main program.
The modules are stored in executable form for ready access by the CPU,
generally in a DASO (Direct Access Storage Device) with low access time
such as a Type 2311 or 2314.
Non-Defect
Term used to describe those situations of Program Support that are caused
by something other than a defect in a program that has Central Programming
Services. A non-defect problem is usually an operator error, user error,
a hardware failure, an alteration, etc.
Non-Disclosure Agreement
An agreement signed by a customer prior to disclosure by IBM of any information that is of an IBM Confidential nature. The agreement states that the
customer will hold in trust any IBM Confidential information unti I such time
as that information becomes public knowledge.
Operator Error
An error made at the system operation level, for instance, incorrect manual
entry of data via the control console or incorrect, response to a system
message. The majority of 'Operator Error' conditions are caught by the
inherent self-checking in job-to-job transition and control programs.
Partition
In systems with Multiprogramming, an area of main storage set aside for a
job.
PIN (Program Information Network)
An entry on RETAIN that describes a problem and/or resolution to a
System/ 3 programming problem.

IBM INTERNAL USE ONLY
13-28

GLOSSARY

Pinpoint
The detailed diagnosis and instruction by instruction analysis of a failing
program that leads to the isolation of a new defect, determination of user
error, or the recognition of a known defect.
PLM
Program Logic Manual - The flowcharts and narrative explaining the logic
of a program, usually broken down to a description of the entire component,
a description of the modules that make up the component, and then the
details of the modules. The PLM is part of the System Reference Library
but is usually not given to the customer, being primarily a reference for
support and troubleshooting activities as performed by PS Reps.
PSHRPQ
See RPQ.
PSRR
Products and Support Requirements Request (Form #120-1702) .
PTF (Program Temporary Fix)
A temporary correction, provided by the Central Support Group, for a
program defect. A PTF is normally provided in response to a Severity
One or Two APAR.
Publications Release Letters (PRL)
This letter distributed weekly to Branch Offices announces any new
publications available at the stationery stores. This includes PLMs,
SRLs and TN Ls.
Reconfiguration
The abi Iity to alter the hardware or software configuration of a system.
This term could apply to either dynamic or static alteration.
Remote Debug
The ability to diagnose a problem and effect a fix or bypass without being
physically on-site. Primarily in dynamic state.

IBM INTERNAL USE ONLY
13-29

GLOSSARY

Remote Terminal
A terminal which is connected to the computing system via communication
lines.
RETAIN (Remote Technical and Information Network)
IBMs communication network for disseminating information, including
System/3 PINs containing APAR information, PTF cross reference lists
and basic records. Also, RETAIN/370, R/370.
RPG
Report Program Generator - Originally conceived and developed by IBM as a
means of providing easy transition for the Unit Record Equipment user to
perform his work on small IBM Data Processing Systems, using techniques
and terminology that were familiar. The RPG as we know it today, has
grown far beyond the early "Unit Record Compatibility" concept and is an
easy-to-learn and use compiler. It is effective for jobs that must be
programmed and executed almost as soon as the need for the resulting output
data is realized.

A customer request for price quotation on alterations or additions to the
functional capabilities of a machine. The RPQ may be used in conjunction
with a Programming RPQ (PRPQ) or a Programming Support for Hardware
RPQ (PSHRPQ) to solve unique data processing problems.
Severity Code
A number 1 through 4 recorded on SCP or Service Classification "A" APARs.
The number is the PS Rep's assessment of the impact the program defect has
on the customer. Severity Code 1 represents the highest amount of impact
and 4 the lowest.

IBM INTERNAL USE ONLY
13-30

GLOSSARY

SRL
System Reference Library - The user manuals and guides, published by DP,
kept as system reference by customers, are collectively known as SRLs.
The library covers Installation Planning Manuals, Programmer's Guides, 1/0
Component Description, Program Specifications, Operator's Guides, etc.
Standalone System
A system that is not interconnected (through TP, channel, etc.} to another
system.
SYSGEN
System Generation - The term used to describe the activity required of the
customer to convert a total Programming System, as received from IBM, into
a tailored system that consists only of the components that are to be used by
the customer on his particular hardware configuration. The basic steps
involve copying the original system for backup, assembling a supervisor that
supports the hardware configuration and contains various user options, the
selective copying of components to be used into the proper libraries and the
inclusion of user programs in the libraries.
Tailored
When speaking of 'SYSGEN', 'Configuration' and 'Reconfiguration', we refer
to a control program 'Tailored' to the hardware system. A 'Tailored' control
program (supervisor} is one that has been 'configured' (generated, assembled,
etc.} to provide the faci Ii ties to support the 1/0 attached and system usage
mode required by the customer, no more or less. This is usually done at
'SYSGEN ', assuming that the proper Programming ~ystem was selected to
satisfy all of the user requirements. The 'Tailoring' of a software system
may also include the addition of user programs and alterations to meet
unusual conditions.
Terminal
Any device or collection of components that is capable of sending and/or
receiving information over a communication channel.

IBM INTERNAL USE ONLY
13-31

GLOSSARY

TNL
Technical News Letters - The update information provided for SRLs,
consisting of replacement pages. TN Ls usually provide minor revisions
or corrections that do not justify a reprinting of the entire SRL.
User
Broad term referring to the person/persons charged with the practical
application of the capabilities of a Data Processing System. It usually
refers to the system programmer and is often substituted for "customer".
The term is only useful when used in context referring to a situation
that leaves no doubt as to who is being called the "User".
User Error
When properly used, this term covers errors made above the operations
level. The programmer is generally the "User" in the context of "User
Error" since he has the responsibility for implementation and is the user,
literally, of the capabilities of the system. "User Error" tends to be
improperly applied to situations where the term "Operator Error" would
be more appropriate.

IBM INTERNAL USE ONLY
13-32

HALT/SUBHALT

LOG

OPTIONS

REASON AND RECOVERY
System generation errors.

GG'4EX

Reason: End-of-extent was reached while building output file on F1.
Recovery 3: Immediate cancel.
1.

2.
3.
4.
5.
6.
7.
8.
9.
10.

GG'4GT

Examine the last logged Fl LE statement and prepare a new Fl LE
statement increasing the space requirements. You will use this statement in step 7.
Press MFCU STOP.
Remove cards in the primary hopper.
Press NPRO. One card is fed into stacker 1.
Remove cards from stacker 1.
Remove all cards preceding the// CALL $SGEN, R1 card.
Place the Fl LE statement prepared in step 1 immediately after the
II CALL $SGEN,R1 card.
Place the II CALL $SGEN,R1 card and cards that follow it in front
of the cards removed from the primary hopper.
Place these cards back into the primary hopper.
Press MFCU START and continue with system generation from this
point.

Reason: A permanent disk 1/0 error has occurred while reading from F1.
Recovery 3: Immediate cancel.
1.
2.
3.
4.

GG'4PT

Press MFCU STOP.
Raise cards in primary hopper and press NPRO. One card is fed into
stacker 1.
Remove cards from stacker 1 and place them in front of the cards in
the primary hopper of the MFCU.
Press MFCU ST ART. This restarts system generation.

Reason: A permanent disk 1/0 error occurred while writing on F1.
Recovery 3: Immediate cancel.
1.
2.
3.

Press MFCU STOP.
Raise cards in primary hopper and press NPRO. One card is fed into
stacker 1.
Remove cards from stacker 1. Remove cards preceding the// CALL
$SGEN,R1 statement and set them aside. Place the// CALL $SGEN,
R 1 statement and the cards that follow it in the primary hopper of
the MFCU.
Press MFCU ST ART. Continue with system generation.

IBM INTERNAL USE ONLY

13-33

HALT/SUBHAL T

LOG

OPTIONS
03

REASON AND RECOVERY
Reason: Inquiry program is ready to be executed.
Recovery 0: Continue. The inquiry program is executed.
3: Immediate cancel. The inquiry program is not executed.

Reason: A problem has been encountered that invalidates the system generation cartridge that contains the program products. Contact I BM for programming support.
Recovery 3: Immediate cancel.

GP'6NE

Field Engineering Maintenance program errors.
GF'7AD

Reason: First three characters of PTF ID are not the same as the first three
characters on the PTF statement.
Recovery 3: Immediate cancel.

GF'7B1

Reason: An invalid unit was specified in the UNIT 1 field of the HEADER
statement or the unit specified is not online.
Recovery 3: Immediate cancel.
Reason: An invalid unit was specified in the UNIT 2 field of the HEADER
statement or the unit specified is not online.

GF'7B2

Recovery 3: Immediate cancel.
GF'7BD

Reason: Displacement for patch is greater than the total module length.
Recovery 3: Immediate cancel.

GF'7CS

Reason: Invalid program temporary fix deck. The cumulative check sum in
the CKSUM field of the control statement does not match the calculated
check sum.
Recovery 3: Immediate cancel.
(continued on next page)

IBM INTERNAL USE ONLY
13-34

REASON AND RECOVERY
GF'7DC

Reason: Invalid patch characters on the DAT A statement for the Program
Temporary Fix program. Valid characters are 0-9 and A-F.
Recovery 3: Immediate cancel.

GF'7DS

(continued)

Reaso.D: Format or punctuation error in the DATA statement for the Program
Temporary Fix program.
Recovery 3: Immediate cancel.

GF'7ES

Reason: The last control statement was not an END statement.
Recovery 3: Immediate cancel.

GF'7HS

Reason: Format or punctuation error in the HEADER statement for the
Program Temporary Fix program.
Recovery 3: Immediate cancel.

GF'7HN

Reason: HEADER statement not first statement of Program Temporaty Fix
statements.
Recovery 3: Immediate cancel.

GF'71D

Reason: The module referred to by the PTF ID field on the HEADER statement can not be found on the unit specified by the UNIT 2 field.
Recovery 3: Immediate cancel.

GF'7LD

Reason: An invalid RLD byte was found in the module being patched.
Recovery 3: Immediate cancel.

GF'7LV

Reason: The level of the module to which the program temporary fix is to be
applied is not the same level as specified in the level field of the PTF statement.
Recovery 0: Continue. The program temporary fix is applied.
3: Immediate cancel.
Reason: Insufficient room in the module being patched for the ~dditional
R LD's required by the addition of the patch.

GF'7ME

Recovery 3: Immediate cancel.
GF'7ND

Reason: No DATA statements followed the P.TF statements.
Recovery 3: Immediate cancel.

GF'7NE

Reason: No END statement foiund at end of PTF.
Recovery 3: Immediate cancel.

(continued on next page)

IBM INTERNAL USE ONLY
13-35

REASON AND RECOVERY
GF'7NM

Reason: Module name on PTF statement was not found.
Recovery 3: Immediate cancel.

GF'7NP

(continued)

Reason: No PTF statement was found following the HEADER statement.
Recovery 3: Immediate cancel.

GF'7NS

Reason: Insufficient space on the unit specified by the UNIT 1 field of the
HEADER statement. Six tracks are needed for temporary work space.
Recovery 3: Immediate cancel.

GF'7PS

Reason: Format or punctuation error in the PTF statement.
Recovery 3: Immediate cancel.

GF'7TM

Reason: Too many PTF statements after one HEADER statement. The
maximum is 11.
Recovery 3: Immediate cancel.

GF'7WP

Reason: Pack applying PTF to is not an active program pack or an active
system pack.
Recovery 3: Immediate cancel.

GF'7WS

Reason: The check byte of the module to which the program temporary fix
is to be applied is not the same as the check byte field of the DATA statement.
Recovery 3: Immediate cancel.

Reason: Auto Report. Terminal errors have been found in the Auto Report
source program.
Note: This halt will be bypassed if NOHAL Twas specified for program level 1.
Recovery 3: Immediate cancel.
Reason: An error has been detected by the MULTl-LEAVING Remote Job Entry
Work Station (MRJE/WS) program. The subhalt or logged error code indicates
the reason for the ha It.
Note: If recovery option 2 indicates that a failing task is deactivated, the
other tasks of the MRJE/WS remain active when option 2 is selected.

IBM INTERNAL USE ONLY
13-36

HALT/SUBHALT

bQ§

OPTIONS

REASON AND RECOVERY
Reason: Library does not exist on specified pack.
Probable user error.

EL67NL

Reason: Error detected by system control program.
Recovery 0: The request is ignored and the module is punched.
3: Immediate cancel.

E067NL

Reason: Error detected by Overlay Linkage Editor.
Recovery 0: The request is ignored and the module is punched.
3: Immediate cancel.

LM67NL

Reason: Error detected by Library Maintenance Program.
Recovery 0: Continue. The request is ignored and the next control statement
is read.
3: Immediate cancel.

Reason: No room in library or directory.
Probable user error.

EL68DF

Reason: System control program detected that no more directory space is
available for the entry.
Recovery 0: The request is ignored and the module is punched.
3: Immediate cancel.

EL68LF

Reason: System control program detected that not enough space exists in the
library to contain the new entry.
Recovery 0: The request is ignored and the module is punched.
3: Immediate cancel.

E068DF

Reason: Overlay Linkage Editor detected that no more directory space is
available for the entry.
Recovery 0: The request is ignored and the modµle is punched.
3: Immediate cancel.
(continued on next page)

IBM INTERNAL USE ONLY
13-37

HALT/SUBHALT

LOG
E068LF

OPTIONS
03

REASON AND RECOVERY
Reason: Overlay Linkage Editor detected that no more library space is
available for the entry.
Recovery 0: The request is ignored and the module is punched.
3: Immediate cancel.

(continued)

LM68DF

Reason: Library Maintenance Program detected that no more directory
space is available for the entries being copied.
Recovery 0: Continue. Request is ignored. Next control statement is read.

3: Immediate cancel.
Note: If a module was being replaced, it might have been deleted, but the
new module will not have been copied into the library.
LM68LF

Reason: No room exists in the library to copy the specified entry or entries,
or there is not enough room to write the modified entry back into the library.
Recovery 0: Continue. Request is ignored. Next control statement is read.

3: Immediate cancel.
Note: If a module was being replaced, it might have been deleted, but the
new module will not have been copied into the library.

Reason: Unrecoverable disk error while using a disk library.
Note: For the LM69HE log, when the logging device is on, the unit in error is
displayed by the OX halt. The pack is referenced on the last library statement
used. The pack is defective and the library used by the executing program
must be recreated.

XX69HE

•

If the error is on the TO pack, the TO pack is defective and the library must
be recreated from the master. Run the alternate track assignment program
to check for a defective track.

•

If the error is on the FROM pack, run the alternate track assignment program
to check for a defective track. If no alternate is assigned, rerun the program.
If the alternate track assignment program indicates errors during transfer of
data, recreate the library.

•

If the error is on the WORK pack, consider that the WORK and TO packs
are defective. Assign an alternate track to the WORK pack, if necessary,
and rerun the program.

Recovery 3: Immediate cancel.
Note: XX can be EL, EO, or LM.

IBM INTERNAL USE ONLY

13-38

HANDBOOKS

IBM System/3 Models 4, 6, 8, 10 and 12
System Data Areas and Diagnostic Aids

IBM System/3 Model 15
System Data Areas and Diagnostic Aids
(For Model 15D - SY21-0052)

SY21-0045

SY21-0032

IBM Field Engineering Programming System General
Information
ZZ25-0511
(Contains information for preparing APARs, APAR mailing addresses,
component IDs and service numbers for System/3)

IBM INTERNAL USE ONLY
13-39

THIS PAGE INTENTIONALLY LEFT BLANK

IBM INTERNAL USE ONLY
13-40

RETAIN/370

RETAIN/370 provides remote support to a variety of functions. The principal
means of support is a data bank which contains information about software and
hardware problems relating to I BM products, and associated activity concerning their resolution. Information is added to this data bank, from your
feedback, continually so that it reflects the current status of problems and
fixes.
As a Branch Office user of RETAIN/370, you will have available to you the
following data bank facilities:
BOIF =

Branch Office Info - This file contains information concerning
Branch Office addresses, phone numbers, region and time zone.

CALC =

Calculator - This file, as its name implies, enables the user to
use RETAIN/370 as a desk calculator in either decimal or hexadecimal mode.

DATE =

Data/Time Facility - This file will take a month, day, and year
entry and give the day of the week it falls on, a display of that
entire month, and the time of the request. It is based on a perpetua I ca Ienda r .

TUTOR = Teaching Facility - This file will instruct the user in the basic
functions of the terminal itself.
DEFAULT=Default Update - This is a facility designed to allow you to create
a chain of selections for use with the Search and/or PASS facility
which will then be automatic w~en you use either of those facilities.
Where you commonly use a particular selection, using default wi II
save time and effort. (However, it is of little importance to the
average user and can create inaccessabi lity of information if used
incorrectly. It really should not be utilized.)
SRCH =

Search Facility - This facility's primary function is to provide
access to maintenance information stored in the Data Bank through
the use of a sequence of words cal led parameters (search argument) . These words can be almost any common maintenance
terms, includi,ng numbers (5408, 1403, etc.). The facility will
scan records for the parameters that you entered and display all
records found on the screen, along with the number of records
found. These records may then be individually selected for
display.

IBM INTERNAL-USE ONLY
14-1

For search purposes, data bank structure is as follows:
-

Information stored by: Library, File and Record
Maximum of 10 Libraries
Each Library supports up to 32 files
Each File may contain up to 8000 records
Each record may contain up to 256 pages of text

The Library lis_ting is:
VfJ = Hardware files, including Symptom Fix, Tech Hardware,
and search assist (help) .
Vl = Software File - APARs, PIN, General Program Info

V2 = Inaccessible
V3 - V8 = Software files
INCD =

Incident Facility - This file contains incidents pertaining to hardware, OS, DOS, Small System Software and Diagnostic Programs.
(Some of these are available to the field. All are available to
the affected support center.)

PASS=

Program Assisted Symptom Search - This facility provides field
access for software problems. By using PASS, that portion of
the Data Bank is searched which contains APARs at various stages
of resolution. The Search allows you to select the type of software
product you are interested in, which part of the APARs in the
Data Bank you wish to search and to display those APARs which
contain the symptom words you entered in that part.
APAR review makes available to you the following types of information:
Abstract:

Component Identity, APAR numbers, reported release,
symptoms of failure and fix release.

Text:

Detailed problem description, PIN items.

Status:

PTF information, severity codes, closing codes and
dates, duplicate APAR information, local fixes or
bypasses, and release information.

IBM INTERNAL USE ONLY
14-2

Resolution Mailing List & Customer Information: Submitter of the
APAR, customer, and PSRs requesting a copy of the
resolution.
COMP ID= Component ID - This facility, if you enter a seven or nine character
specific component ID, will display for that component:
Which PIN file in Search Library Vl the component should
reside in; which PASS Library the component should reside in;
which Tech Ops Attention list the component should reside in.
A four character component ID, followed by a space and ALL, wi II
display the same information for all components with that four
character base.
DLL =

Data Link Library - This library contains fixes, additional to
those in the PASS libraries, including pre-released PTFs. There
are other options al so, but they are not relevant so are not discussed here.

WHO =

Get Signed on ID - This function will display the name of the user
who is signed on the terminal.

TEST =

Terminal Test - This function will test the terminals ability to
function as a display. The tests are as follows:
Ful I screen - All characters
Ful I screen - H
Ful I screen - 0
Ful I screen - I
Alternate blank and
Ripple pattern
Erase screen
Filf ~with echo message
Full screen of---A,--tRen B, etc
Start Line Test

TRANSFER = Transfer User - This function will allow the user to transfer
sign on of the terminal to another user without a sign-off and sign-,
on.
PEND =

Pending Log - This is the function that allows messages to be sent,
via the RETAIN/370 system, from one location to another. A pend
ID selection (and only those assigned to your location, and available, will display a list of memo titles. They may then be selected
by number to display the memo.
IBM INTERNAL USE ONLY
14-3

5404 RETAINS

TIP 5404 001 -Al-LOGIC YB101
LOGIC PAGE YB101 IN 5404 ALO VOL 11 MISSING
END OF ABSTRACT
LOGIC PAGE YB101, P/N1639807, EC571784 IS MISSING FROM THE
5404 VOLUME 11 ALO BINDER. THIS PROBLEM IS BEING CORRECTED
BY BOCA RATON. IF REFERENCE IS NEEDED TO THIS PAGE TO MAKE
208/230 AC VOLTAGE CHANGE, AND YOU HAVE A 5408 IN YOUR AREA,
THE YB101 PAGES ARE THE SAME.
76/ 07I13, BOCA RATON
TIP 5404 002 -CK-5213 SYNC CHECK
AAA 5213 PRINTERS EXPERIENCING SYNC CHECKS ON INSTALLATION
END OF ABSTRACT
SOME 5213 PRINTERS BEING SHIPPED TO THE FIELD WITH SYSTEM/3
PRODUCTS MAY HAVE INCORRECT PRINTHEAD TO PLATEN CLEARANCE,
CAUSING SYNC CHECKS WHEN THE FORMS THICKNESS KNOB IS SET TO 3.
CHECK THIS ADJUSTMENT PRIOR TO ADJUSTING THE PRINT EMITTERS.
REFERENCE 5213 THEORY-MAINTENANCE MANUAL, PRINTHEAD TO PLATEN
CLEARANCE SECTION, FOR CORRECT ADJUSTMENT PROCEDURE.
76/07 /14, BOCA RATON

TIP 5404 003 -Al-LOGIC ERROR
AAA LOGIC PAGE JR610 NOTE 1 IS INCORRECT.
IS REFERENCED ON TIE DOWN PAGE A6001.
76/07/14, BOCA RATON

CORRECT JUMPER

TIP 5404 004 -Al-UPENDING KIT
AAA ZZZ THE UPENDING KIT BILL NO. IS B/M7374676. THIS NO. IS
IN THE UNPACKING/PACKING INSTRUCTIONS. ALSO THE SPECIFY CODE
FROM THE SALES MANUAL PAGE IS NO. 9840 LOCATED IN 5447 SECTION
UNDER SPECIFY.
76/07 /20, BOCA RATON

TIP 5404 005 -Al-INSTALL ASSIST
AAA ZZZ TO ASSIST YOU IN ADDING THE DISPLAY ADAPTER MICROPROGRAM TO THE CUSTOMERS PACK (S) REFER TO CHAPTER 10 STEP
10.3 OF THE INSTALLATION INSTRUCTIONS FOR THE PROCEDURE.
76/07 /21, BOCA RATON

IBM INTERNAL USE ONLY
14-4

TIP 5404 006 -Al-5213 PRINT SLOW
AAA 5406 BEING REPLACED BY 5404 AND CUSTOMER RETAINS THE 5213
FROM 5406. 5213 BUILT PRIOR TO JULY 1972 MAY NOT HAVE FACTORY
EC 138845.
END OF ABSTRACT
AFTER INSTALLATION, THE 5213 MAY RUN AT SLOW SPEED WITH NO
CHECK INDICATIONS. CHECK THE 5213 FOR EC138845 BEING INSTALLED
WITH THE MACHINE POWER ON, PROBE 01A-A2B5-D03. IF THIS POINT
IS APPROX. -4V THE EC IS NOT PRESENT ON THE 5213.
TO INSTALL, LOCATE WHERE THE PRINTER CABLE GOES INTO SOCKET
POSITION ON MODESTY IN 5447 LOCATION W2A 1. LOCATE THE B03 PIN
ON THE PADDLE CARD. INSERT JUMPER P/N347120 AND SOLDER BETWEEN
PIN B03 AND THE COMMON BUSS. THIS MAKES THE LINE GOING TO THE
CPU CALLED FEATURE INTERLOCK ACTIVE. REPLUG CABLE W2A 1.
THIS CHECK WILL BE INCLUDED IN THE NEXT EC UPDATE TO THE
INSTALLATION INSTRUCTIONS.
UPDATE HISTORY TO SHOW EC138845 AND ORDER LOGIC PAGES FOR
THE 5213.
PAGE ZZ106 P/N2632649
ZZ103 P/N2632646
WP020 P/N2640762

TIP 5404 009 -DD-ERROR ON YB 100
NOTE 3 ON YB 100 P/N 1636079 EC57l869 IS INCORRECT
END OF ABSTRACT
NOTE 3 ON LOGIC PAGE YB100 HAS CE ADD JUMPER P/N208989 FROM
CB1-R1 TO CB1-C1. IT SHOULD READ CB1-L1 TO CB1-C1. THIS PAGE
WILL BE CORRECTED IN EC571962.
76/10/21, BOCA RATON

TIP 5404 010 -Al-S/3 TP NETWORK
AAA ON SYSTEMS THAT HAVE MULTIPOINT CONTROL STATIONS USING
3875 MODEMS, CHECK THAT TRIBUTARY MODEMS HAVE AUTO-RESYNC
TIMER PLUGGED CORRECTLY.
END OF ABSTRACT
IF NOT PLUGGED CORRECTLY, RETRIES ON VARIOUS ERROR CONDITIONS
WILL BE UNSUCCESSFUL AND CCP PLACES THE TERMINAL IN ERROR
RECOVER (DROPS IT LINE). REFER TO TIP 3875 FOR STRAPPING
OPTIONS.
76/10/28, BOCA RATON

IBM INTERNAL USE ONLY
14-5

TD22926 TIP 5404 012 -CK-DA PROC CHECKS
AAA KEYBOARD PARITY ERRORS AND 1/0 LSR PROCESS CHECKS MAY
BE CORRECTED BY PERFORMING THE FOLLOWING.
END OF ABSTRACT
1.
REMOVE SLIP ON CONNECTOR FROM 01A-B3H2 D06 AND PLACE
ON ANY DOS PIN.
2.
INSTALL TWO (2) FERRITE CORES (P/N853288) AROUND THE
DISPLAY ADAPTER COAX CABLES JUST BEFORE THE CABLES
ENTER THE TAILGATE PORT PLATE.
A CHECK OF ALL ESD HARDWARE, FINGERSTOCK, STRIKER PLATES,
KNIFE BLADES, COVER STRAPS, ETC. SHOULD BE MADE. THIS
SHOULD ELIMINATE ESD CAUSED PROBLEMS.
AN EC WILL BE RELEASED TO DOCUMENT THESE CHANGES.
76/ 12/ 22, BOCA RATON

IBM INTERNAL USE ONLY
14-6

5408 RETAINS

TIP 5408 001 -Al-SYS/3 FILE SWAP
AAA 5408 SYSTEMS BEING ORDERED WITHOUT 5444 FILES.
SEE TEXT.
END OF ABSTRACT
SOME 5408 SYSTEMS, THAT ARE DISPLACING OTHER SYSTEM/3 DISK
SYSTEMS, ARE BEING ORDERED WITHOUT A 5444 FILE. CUSTOMER
ENGINEERING WILL BE REQUIRED TO RELOCATE THE 5444 FILE FROM
THE EXISTING SYSTEM INTO THE 5408 FILE ENCLOSURE. INSTALLATION
INSTRUCTIONS WILL BE UPDATED, IN THE INTERIM USE CHAPTER 3
AND APPENDIX Ill FOR ASSISTANCE. THE FOLLOWING SHOULD HELP
TO ELIMINATE RELOCATION PROBLEMS 1. CAUTION, THE FILE WEIGHS IN EXCESS OF 60 POUNDS. TWO
CUSTOMER ENGINEERS SHOULD BE USED TO PHYSICALLY CHANGE
A FILE FROM ONE ENCLOSURE TO ANOTHER. IF NECESSARY A
5444 SHIPPING CONTA~NER P/N7360660 CAN BE ORDERED FROM THE
ROCHESTER MLC DEPARTMENT 624 TO ASSIST WITH 5444 RELOCATION.
2. THE 5444 MUST BE A MODEL A (HIGH SPEED ACCESS) TO BE RELOCATED INTO THE 5408.
3. ALL RELOCATION TIME, INCLUDING TESTING, MUST BE WRITTEN
AGAINST SERVICE CODE 21 NOT BILLABLE. FOR REPAIRS USE SERVICE
CODE 01 OR 02. SEE YOUR SERVICE CODE FOLDER, DO NOT USE
SERVICE CODE 22 AND/OR 20.
75/04/29, BOCA RATON

TIP 5408 003 -Al-PTR METER POWER
AAA 5203 PRINTER MUST HAVE METER POWER PACK TO FUNCTION
CORRECTLY ON 5408
END OF ABSTRACT
SOME 5408 SYSTEMS WILL BE DISPLACING 5410 SYSTEMS AND OCCASIONALLY
A 5203 PRINTER WILL BE RELOCATED ON TO THE 5408 SYSTEM. THERE
ARE 5203 PRINTERS, WITH EC360335, THAT HAVE A USE METER TERMINAL
BLOCK AND NOT A USE METER POWER PACK. ALL METERS ON 5408
SYSTEMS REQUIRE POWER PACK. ENDICOTT B/M4254963 MUST BE
ORDERED TO INSTALL A POWER PACK IN THE 5203. SEE 5203 SERVICE
AID NUMBER 8.
75/07 /09, BOCA RATON

IBM INTERNAL USE ONLY
14-7

TIP 5408 005 -Al-SYSTEM LOOPS
5408 HANGS IN 1-R BACKUP AFTER CUSTOMER RUNS OUT OF PAPER
OR CHANGES PAPER ON THE 5203.
END OF ABSTRACT
IF YOU HAVE A LOOPING PROBLEM CHECK TO MAKE SURE THAT YOU
HAVE A 500MFD CAPACITOR BETWEEN TB2-4 AND TB2-6 ON THE
PEB IN THE 5203. CHECK THE POLARITY OF THE INSTALLED CAPACITOR
TB2-6 (PLUS) TB2-4 (MINUS) ALSO MAKE SURE A CAPACITOR 39MFD IS
INSTALLED ON THE TB2-1 (PLUS) AND TB2-3 (NEG). THE 500MFD
IS P/N4035628 AND THE 39MFD IS P/N4254517. IF YOU STILL HAVE A
PROBLEM REPLACE 500MFD CAPACITOR WITH A 1000MFD.
75/07 /18, BOCA RATON

TIP 5408 008 -Al-ORDER PROBLEM
FEATURE CODE 9221 MUST BE ORDERED FOR 5203 PRINTER INSTALLED
ON 5408
END OF ABSTRACT
WHENEVER A 5408 IS ORDERED, 5203 PRINTER PREREQUISITE FEATURE
CODE 9221 MUST ALWAYS BE ORDERED. THIS WILL INSURE THE 5203,
SHIPPED FOR INSTALLATION, WILL HAVE THE METER POWER BACK AND
DC DISTRIBUTION POWER CABLE FACOTRY INSTALLED. IF THE MODEL
8 IS DISPLACING A SYSTEM/3 MODEL 10 AND THE EXISTING 5203 IS TO
BE RELOCATED ONTO THE 5408, THIS FEATURE CODE CAUSES B/M4254915
TO BE SHIPPED. ENDICOTT B/M4254915 SHIPS THE DC POWER CABLE
P/N1639656 AND WILL ALSO SHIP METER POWER PACKS IF REQUIRED.
PLEASE INSURE THIS FEATURE CODE HAS BEEN ORDERED TO PREVENT
INSTALLATION DIFFICULTY AND DELAY.
75/08/19, BOCA RATON

TIP 5408 023 -Al-CABLE DRAWINGS
AAA INSTALL 5421 ON 5408 (RPQ)
END OF ABSTRACT
B/M2444326, INSTALL 1403 ON 5408 REFERS TO CABLE DRAWINGS P/N2444303.
B/M2445950 REFERS TO CABLE DRAWINGS P/N2444304. THESE DRAWINGS
ARF'. SHIPPED IN RPQ ALO VOLUME 4, NOT WITH THE B/M INSTRUCTIONS.
DRAWINGS P/N2444309, P/N2444308, P/N2444328 AND P/N2454751 ARE ALSO
IN THIS VOLUME. EC894060 WILL CORRECT THE REFERENCE TO THESE
DRAWINGS.

IBM INTERNAL USE ONLY
14-8

TIP 5408 036 -Al-NON-IBM PRINTERS
AAA SYSTEMS WITH AN NON-IBM PRINTER ATTACHED MAY SHOW A
SHORT BETWEEN FRAME GRD AND LOGIC GRD DURING CPU GROUND
CHECKS AS PER SYSTEM/3 INSTALL INSTRUCTIONS OR MAP CHARTS.
END OF ABSTRACT
SOME NON-IBM PRINTER MANUFACTURES TIE LOGIC GROUND TO FRAME
GROUND. WHEN INSTALLING OR TROUBLE SHOOTING A SYSTEM WITH AN
NON-IBM PRINTER, IF A SHORT IS EXPECTED TO BE CAUSING A PROBLEM
THE NON-IBM ATTACHMENT OR PRINTER MAY HAVE TO BE ISOLATED FROM
THE CPU.
THE CE SHOULD ADVISE THE CUSTOMER THAT THE NON-IBM SUPPLIER
SHOULD BE NOTIFIED AND ASKED TO UNHOOK THE ATTACHMENT TO
ALLOW TROUBLE SHOOTING TO CONTINUE.
76/10/26, BOCA RATON

TIP 5408 038 -Al-CABLE ASM 5471
AAA ZZZ WHEN DISCONTINUING A 5408 WITH A 5471, CABLE ASSEMBLY
P/N2590388 SHOULD BE REMOVED FROM THE CPU END AND RETURNED
ATTACHED TO THE BEZEL ASSEMBLY. DO NOT LEAVE IT INTACT IN
THE CPU.
END OF ABSTRACT
76/11/17, BOCA RATON

TIP 5408 039-DD-MAP ERROR
AAA ZZZ CPU MAP CHART PAGE 204, BLOCK Fl, STEP 2, STATES
'METER E10 TO E13 AND E10 TO E12 ON THE MEMORY P/S. LOOK
FOR 10-13 VAC'. THIS INPUT RANGE SHOULD BE 13-18 VAC.
END OF ABSTRACT
76/11/30, BOCA RATON

IBM INTERNAL USE ONLY
14-9

5404 SERVICE AID
5213 Intermittent Sync Check
The following procedure should be used to eliminate intermittent SYNC checks
on 5213 Model 3 printers.
1.

Turn power off.

Loosen the coupling which joins the leadscrew and stepper motor.
Remove the stepper motor from the casting and lay in base.

Check for binds in the leadscrew by pushing the printhead from
one margin switch to the other. The printhead should be very
free and move with little or no resistance. The following steps
should be used to eliminate any binding conditions.
a.

Check for contamination on the carrier support shaft and
leadscrew.

If binds still exist, rotate the carrier support shaft in
one quarter turn increments. This shaft can be rotated
by loosening the set screw on the left support frame.

Mount the stepper motor on the frame.

Loosen the transducer clampscrews and adjust each transducer
eccentric to the center of its travel.

Perform the print carrier and print emitter adjustment per step
2. 20 of the 5213 TMD.

Adjust the emitter air gaps to . 001 to the highest point on the
emitter wheel.

Turn power on and run diagnostic E8A and loop on Routine 2.
Scope the following points in the 5213 attachment and check for
a minimum output of 3 volts.
Print Right Emitter
Print Left Emitter
Stepper Forward Emitter
Stepper Reverse Emitter

01A-A2-C2D07
01A-A2-C3D07
01A-A2-B2808
01A-A2-B2B 12

If 3 volts is not obtained, readjust appropriate emitter.
9.

Adjust stepper motor speed using diag E87. Adjust forward and
reverse emitters so they fa 11 into the 11 . 50 to 11 . 70 MS Range.
IBM INTERNAL USE ONLY
14-10

10.

Adjust print emitters using Diag E89. Adjustment on the
5213/3 Printer is correct when the X is lined up under the
left hand X and adjusted via the eccentric to fal I in the
middle of the 3X tolerance.

11.

Recheck the output of the emitters using the procedure in
Step 8.

IBM INTERNAL USE ONLY

14-11

255 ENVIRONMENTAL NOISE ANALYSIS
PURPOSE:

GENERAL

To provide quidance in defining and solving
random system failures caused by adverse
environments, such as static discharge,
improper grounding, input power and radiation.
Suggested Problem Analysis

A suspected noise-sensitive system must be thoroughly
checked to insure the absence of hardware oriented
failures, particularly where critical circuit timings
are concerned. Insure that the timings in the critical path under ronsideration are within specified
tolerance. Lack of optimum adjustments may be a
contributory failure factor in a marginal environment. Check all noise ~nalysis service aids or ECA's
and upgrade system accordingly.
The environment should be considered when the trouble
shows up as random unexplainable machine failures
which do not respond to hardware efforts, primarily
in one or more of the following:
1.

Read Only Storage Checks

Main Memory Checks

Storage Protect Checks

Local Storage Checks

Power Checks

Failure symptoms not logical.
(Indicators
set which should not be on under normal
operation)

Random failures on several devices.
checks, ROS hits, select locks etc.)

(Sync

Contact your Branch Office Installation Planning
Representative to assist you in analyzing your
customer's computer room environment. He is a
specialist in this type of analysis. The following
should be considered:
Cause of Random System Errors
1.

Static Discharge
Major factors that contribute to static charge
build up are:

Static generation and dissipation characteristics of the furniture within a computer
room.

Static characteristics of the raised floor
in the computer room.
(Type of tile, resiliency pads, proper grounding)

Relative humidity below recommended criteria
of 50% + 5%.

Static Discharge

("~re")

may occur from:

Furniture to CPU and/or I/O units

Personnel to CPU and/or I/O units

Furniture to any grounded metal

Personnel to any

IBM INTERNAL USE ONLY
14-12

groun~ed

metal

rrrn~

General

255 continued

Improper Grounding

llS volt neutral current on green wire ground.

High re•i5tance ground.
Earth Te•ter)

Excess RF noise.
Probe)

Ground loops

(Requires use of

Radiation

Radar

RF heaters

Electrostatic devices

(Requires use of Stoddart

Input Power (Not meeting IBM apeci. fications)

Power line transients. (High frequency)
Requires use of Line Interrogation Device
(LIO)

The following flow chart details a recommended environmental analysis procedure:

Power line diaturbancea. (Low frequency)
Requires use of Esterline Angus recording
voltmeter.

H.ARDWARE
SHAKEDOWN
ACCOMPLISHED

1-----~

OPTIMIZE
TIMINGS AND
VOLTAGE LEVELS
CHECK SERVICE
AIDS, UPGRADE
EC LEVEL

YES

UNDEFINED
PROl!LEHS
-STATIC

ASK ALL COMPUTER
PERSONNEL IF THEY
Y EVER FELT A SHOCK
E..__ _~--..-----~

NOT
SURE

PEOPLE
COMPLAIN
OF SHOCKS

KNOWN
STATIC
ENVIRONMENT

LIKELY LOW
RELATIVE
HUMIDITY &
OUT OF SPEC
FLOOR

SOMEONE SLIDE ACROSS
THE FLOUR HOLDING
POINTED METAL OBJECT,
TOUCH IT TO GROUND,
CHECK FOR SPARK

OTHER I/O
UNIT PROl!LEHS
YES
1403 SYNC CHKS'---M
2311 SELECT
LOCKS

N
0

ATTACH SHORT INSULATED WIRE TO CHAIR,
RUB BRISKLY /W OIFF.
CLOTHS.* TOUCH OTHER
END OF WIRE TO GROUN[
CHECK FOR SPAR~

LIKELY
A STATIC
ENVIRONMENT

CH ECK IF
RELATIVE
HUMIDITY
IS

LESS

THAN 404
N**

0
N
0

CO TO POWER
&. GROUNDING

REQUIRES
INSTKUMENTATION
TO HAKE A POSITIVE DECISION ON
STATIC
SOURCES

*Wool
o~

Nylon•

FLOW CHART

Silk. 1 Pl•stics

all type.a

ll!CORD DATA
AND CONTACT
INSTALLATION
PLANNING REP.
ENVIRONMENT
HUST BE EVALUATED

Probably OK: flovever. on very rare occasions, static prot>lea• have been known
to occur where room relative humidity was in exceee of 50%.
Ask IP~ for
assistance if you feel static is a factor.
NOTE:
To properly judge static charge build-up a static-locator tool auet be
used.

A'~ t~e

in't~llatiQn

fl•nning Repre1entative tor assi1tance.

IBM INTERNAL USE ONLY
14-13

255 continued
UNDEFINED PROBLEMS
POWER AND GROUNDING
DESIIAILE TO - CONTACT I 0
INSTALLATION PLANNING REPRESENTATIVE
AS
POWER DISTRIBUTION BACKGROUND
AND
SPECIAL INSTRUMENTATION IS REQUIRED
GROUND SHOULD
IS PROBLEM
YES
BE CHECKED AT - - - - TIME ORIENTED
POWEil PANEL

POWER
SHOULD .

••

n cne'-.iD

CHECK IF CUST.
USES REGULATING
TRANSFORHIRS
W/I BLDG.
IS ESTERLIHE
ANGUS tlETEI

BURST OF NOISE
NOTICE ON SCOPE
ON OCCASIONS
NO

IS CLAMP-ON
AMMETER AND

STODDART
PROBE
AVAi LABLE

RECENT CHANGE
IN CONFIGURATION
NEW POWEil DIST.
ADDITIONAL POWER
PANEL

YES

AND LID
AVAi LAiLI:
y
E

HONITOl
LIN!

GENERAL GEOGRAPHIC AREA
y
KNOWN AS HAVING
PAST POWER PROBS. E

y
E

By definition, • "neutral" conductor (white in1ulation) neraelly carria1
115V AC return current• to traneformer center top. ly definition, a
"green wire" (green or 1reen with yellow tracer in1ulation) •u•t not
normelly carry current, but muet be capable of 1upportln1 ph11e fault
detection and interrupting current•.

••

Power dietribution load chanae• or capacitor awitchin& ••Y be occurring.

IBM INTERNAL USE ONLY
14-14

General
255 continued
UNDEFINED
PROBLEMS
RADIATION

RADAR IN
VICINITY

RADAR NOT
IN LINE OF
~;I

TURN DEVICE
ON bi OFF
CHECK FOR
SYSTEM ERROR

YES

RF RADIATION
DEVICES JN
VICINI'!'\'
NOTE

YES

CONTACT IPR
HONfTOR POWER
AND GROU~D
WITH LID AND

STODDART PROBE

RADIO & TV
TRANSMISSION
UNLESS IN
ADJ AC ENT ROOM
NUT L I I\ E I. Y .\
l'ROBl.U\

DETECT
DISTURBANCE

GllT,

N ll

l'ROlll.l':H

CHECK F·OR
PICK ur USE
453 SCOPE
U~ING THE LEA[
AS A!1 ANTEN!'IA
**

NOT LIKELY
/>.

NOT

PROBLr:M

SURE

POSSIBLE
PROBLEM
CONTACT
IPR

IPR WILL
ADVISE

ACTION ON
POWER DIST.

....J

r F rN

UOlJBT

*KOTE:

RF DEVICES - ARC ANU RESISTANCE WELDERS
R F 11 F. AT F. RS - [ LE CT Rfl ST AT ! C P ,\ I NT :'i P RAY ERS
CUNTACTORS - COMMUTATOR f\'P~ MOTORS ETC.

Repetition rate nor•ally every 6 to 10 seconds
(function ot antenna rotation)

The electrostatic simulator should be used to chc~k a system'~ general
noise suy~eptibility.
Contact your B/O Intitallation Planning Representative
for assiYtance.
the IPR has the responsibility to interfa~e to the customer
the environment with l1>ca1 management approval on post
installation pr·\Jblem8.

Remember,

t~·-~o-Jify

Environmental Instrumentation
The following instruments are available through your
B/O IPR. Some of the instrumentation is under Area
Control.
S'fATIC
Sling Psychrometer

Checks .humidity

Thermo Humidigraph

Grapns temperature and
humidity.
Checks all ground including floor under
structure
High resistanc~ measurement of floor surface and
furnitures

Earth Tester
Meqohmmeter

Static Locator

•

•spark Gap"
Electrostatic Discharge
Simulator

GROUNDING
Earth Tester

TestB continuity
Poor contact resistance

Clamp-on

Checks for low frequency
ground current

Anvn~ter

INPU'f POWER

Esterline-Angus Recording
Voltmeter

Graphs low frequency
power line disturbances

Line Interrogation Device

Detects hi-frequency
power line transients

Clamp-on Ammeter

Checks phase balance

RADIATION

Measures static voltage
charged up on cbjects

Radar Crystal Detector

Demonstrates static discharge

Measures radar field intensities

LID and Stoddart Probe

Measures ftF noise coupled
from radiation on to
ground or power lines

Checks unit static
sensitivity

I 71/06-01-70

IBM INTERNAL USE ONLY
14-15

· Baeral
STATIC ENVIRONMENT EVALUATION

256

SERVICE AID

Purpose: Static generation is a primary concern
within a computer room. Removal of the major static
source could well prove to be the simplest •olution
to an intermittent problem.
This service aid suggests a measurement procedure
for the Branch Off ice Installation Planning Representative to effectively define static sources within the room. Tneretore, by the utilization ot this
Service Aid, logical decisions can be made to determine the most appropriate action to improve the
environment.
Remember, static pt·oblems have been known to occur
even when the humidity is over 50\. Hurni di ty is
only one parameter. The flow charts in this service
aid will describe how to measure some of the other
factors.

Temperature
and
Relative
H.uatdity

Install Thermo
Humidigraph
at Represent.at !.on Loe. in
Comp. Room &
Cal tbra te

Use Sling
Psychrometer
Calibrate the
Cust.'s T/R.H at
Sensor•

Why
Long Term Hard
Copy of T/RH
Relate Trouble
Incident to
Change in Temp.
and R.H.

Take Various
Sling Readings
Around System
.__ _ _ _ _ _ _......,. an-d Other Part•
of Comp. Room

Record Data
By Location
Check Adj
Areas in
Similar Manner

"Before wetting the sling's wet bulb, check both
thermometers for identical recordings. Record
any difference and apply this for conversion.
NOTE:

How much effect relative humidity has on
static generation can be judged if the
humidity varies 10\ to 20\ within the
computer room. Make resistive measurements
and conduct static demonstration at both
RH conditions and compare results.

IBM INTERNAL USE ONLY
14-16

Note Aaount
•f

Difference
Diacuaa with
Customer

General
256 continued

Null-Balance
Eartfi.. Tester
Lov

Resistance

Metal sue~ aa: Conduit.
Air Duct. Water Pipe
Building Steel 0 Circuit
Breaker Panel. Partitions etc.

Measure from
green wire to
metal anywhere
ln Comp. Room

Try to Improve
Resistance of
Green Wire should
b~ Lesa than 3 ohaa*

Lesa

Normal
Record
Data

Readin1a Flutter
Heaaure Green
Wire to Pedestal
at Point Where
Cust. has Grounded
Floor

Normal
Record
Data

Over

Lesa

Loose
Connection
or
A/C Current
Flow
Have
Customer
Positively
Ground Floor

Measure Floor
Underatructurf'!
Hay be as High as
9990 ohms the maximum reading of meter
and still be capable
of draininR off static
change - See Note

NOTE:

Static charqe will drain off an object as
fast as it is generated if its path to
ground is less than 109 ohms.
Reference in IP Manual relative to RF filters
and for safety to trip circuit breaker on fault
condition.
Apply ohms law R • E

For 60 amp service 230 Volta • J.8 ohms to
~ Amp
trip breaker
Por 100 amp service 230 volts• 2.3 ohma to
IOO
trip breaker

IBM INTERNAL USE ONLY
14-17

General
256 continuMe1oflaaeter
lltah. l.eatatanc•
Kea ..n:~ent

Measure Between
Metal of Cart or
Chair tu Ground ...~~~~~c
Plane Under the
Caete.r

Meaaure l•tween
Electrode on Top
- - - -... of floor Surface
to Underetructure
NO
Floor not
Part of the
Problea at
thla tlae
Record Date*

Measure All Carts
• Furniture ln
toap. Rooa; Also
Carts of Maintenance Peraonnel
Used in Cleaning
Safety
Prob lea

Wax or

Not Part
the
Prob lea
Record

tayter Resistance
Beyond lBH'a
Specificatlone
Thi~ ls a problea

Surface
Build-up _ _ _..
la a
Prob lea

Resiliency
Pads Actin1
aa Insulator
la .a Problea

Data

Tile Surface
Beyond IBM's
Spec l f lea t ioua
Thia la a problea

Record all Data
See Static Teat
Flow Chart to
Develop Action
Plan

• Floor resistance is relate~ to other parameters
which can materially affect our measurement, such
as:
1. The relative humidity within the computer room
2.
Recent maintenance action on the tile surface

(wax, mopped)

IBM INTERNAL USE ONLY
14-18

General
256 continued
Static Test

Tu;-t;;TIOW1 n I
Data should
be Recorded

Charge
FurnitureIf charge does
not Drain off
lleaiatance 1111
High(Not aa

Megohmmeter
Not Available

Check
Hegohm11eter
Flow Chart
-Rec~

Data

Accurate

Check

Temperature
anJ Relative---~<
Humidity
Flow Chart
Record Data

Check

Null..-Balance
Earth Teoter
Flow Chart
Record Data

~----<

L. _ _ _~
Purpoae of
Obtain Stl'tic
Chrcking for
w------iLoc.itor for
Charge Bu ilJ'feats - Record
up on PrinteraA 1 l Ila ta
People any Material
Separation

Co To
Cart
Tea to

NOTE:

Go To
Furniture
Teat a

If error occurs while on site, try to reproduce failure situation using static
locator to determine the amount of charge
that may have built-up during the time of
system failure.

IBM INTERNAL USE ONLY
14-19

Bmanl
256 continued
Furniture
Test

Rub With
Different
Clo the* and
Kea sure
Charge
Build-Up

Not An
Excessive
Build-Up

Charge Level High

May Be
Excessive
4 to S K
volte will
cause "arc"
across spark
gap

Chair Puahed
Against System
may cause error ~ if "arc" occurs
Deaonatration
See NOTE l

Spark

.
1

Gap

Connect one
Electrode to
the Chair and
the other to
system metal "arc" will cause
error

When iesistance to Ground
is Less than 109 ohms charge
will drain off as fast as it
is generated,
If charge reaain•
use Alum, Foil to short around
caster or insulated insert or
floor tile.
Define the high
resistance path .

No
Charge Level
Drains down to
Below 500 volts
Within one second
Not considered a
Problem

,.
I

Radiation

Spa1·k Gap
Connected to
Remote Ground
Instead of
Sys Lea

*Wool, Nylon, Silk
Plastics of all types

NOTE l:

System may not fail because of a coincidence factor - amount of voltage charge,
time of discharge, and timing relationship
of the critical cir6uit.
A marginal value
charge may not cause a failure in 10 trys,
but static still could be a problem.

IBM INTERNAL USE ONLY

14-20

General
256 continued
Cart

T·~·t

loll Cart with
Non-Conduct iv•
Caat•r•* Meaaure
Charge Build-Up

loll Cart Yhli

Conducttva Caatara*
Measure Chara•
Build-Up

Note
Difference
Record Data

Hot Excaeaiva Perhapa
Becauae: Floor til~
meet• apecificationa.
floor treatment.
caster and floor
compatibility.or hiah

Conductive caster• «re
normally marked with an
oran~e or red dot.
Heaaure
with M megohmmater to be aure,

Since Floor
Surface i•
the aame,
difference
denote•
caater
effect

Hay be
!xcaaaiva
4 to 5K volt•
will cauae "arc"
aero•& ap11rk. a•P

Yea
When reaiatance to ground
i• l••• than 109 ohm• charge
will drain off a• feat •• it
i• 1enerated.
If chars• remain•
u•• Alum. Foil to ahort around
caater or inaulated inaert ot
floor tile, Define the hiah
r••iatanc• path

w---~~~-

Go To Floor
--~~----~--~--~----------~--~-..Treatment

Demonatration

IBM INTERNAL USE ONLY
14-21

Chara• Level
Drain• Down to
le low 500 Vol U
Within One Second
Not Conaiderad
A Problem

256 continued
Floor Treatment Demonstration

Treat several panels with an anti-stat concentrate.
Take the same cart, roll on the Wltreated floor until the charge is built up, continue to roll the
cart onto the treated floor. Does the charge dissipate? Now reverse the procedure. Roll cart on
treated floor. Does the charge build up? Then
continue to roll onto the Wltreated floor to determine if charge again builds up. This domonstrates
the effectiveness of the treated floo.r. When the
floor is an adverse factor, correctivd action should
be considered.
Review Hints
1.

What is the major static source?

The environmental type of prolllem may be maskin9
a hardware problem. Once the environment is
controlled, the hardware problem can be more
effectively analyzed.
Static Environment Conclusions:
l.

Review all data to determine which parameters
are combining to cause static generation and
lack of dissipation.

Determine what customer action would be least
expensive and still effective. As an example:
Remove the console chair for a test period of
two weeks.

Demonstrate to the customer the static relationship of the things you wish to change.

Are casters part of the problem?

Consult with OP and FE management before interfacing
with the customer with your recommendations.. Normally, all relative data and facts should be presented to the customer in a straight forward manner.

What factors will change or did change with
variation of the relative hwnidity?

When assistance is required, contact your Aroa
Installation Planning ~ngineer.

What can you demonstrate?

Is this a three shift operation?
related to a particular shift?

Is the problem temperature related?

a.
b.

Can you prevent static generation?
Can you prevent static •arc"?

Is the problem

How Susceptible is the System to Static Discharge
The Electrostatic Discharge Simulator, sometimes
called a "Zapper" simulates the average discharge
characteristics of furniture. 1'his tool can determine the static susceptibility of the system and
evaluate noise abatement changes.
CAUTION:

Proper training is absolutely required
on the use of this tool. Check with
your Area Installation Planning Engineer
who controls this tool.

"ZAP" Considerations
l.

Establish system ESD level.

"ZAP" other units of a aystem such as 2821, 1403
and 2540 •o that a reference judgement can be
obtained.

By observation of operation and traffic flow,
ZAP part• of the system that have a possibility
of experiencing a static "arc". Attempt to
duplicate the problem.

Uae "ZAP" technique to check the adjustment of
retry on 360/50 system.

NOTE:

Excesaive RF noise on the green wire, as
measured by the Stoddart Probe, can be a
cause of increased aeneitivity of a system to
static discharge.

Problem Analyais Conaidorationa
l.

Were the ESD Zap levela considered average? If
they wure well below average, can the system be
upgraded? How much RF noise is on the ground?
Are noise abatement EC• available? Check ECA in
CEM.

Was the problem or part of the problem duplicated by either the ESD •i~ulator or by static
demonstration? If thi• is true, atatic ia
likely to be a factor.

IBM INTERNAL USE ONLY
14-22

171/06-0l-7C

268

PROCEDURE FOR EVALUATING ELECTROMAGNETIC INTERFERENCE IN A COMPUTER
ROOM

Electromagnetic interference is known by many names:
EMI - Transients - noise - zaps and electrostatic
discharge.
Regardless of what it is called, when it
occurs it can cause random errors in CPUs, control
units or I/O equipment.
The most common source of
this interfere~ce is electrostatic discharge.
This
phenomenon occurs in our customer's computer room
when the electrostatic charge that has been built
up on his chairs or carts is dissipated to ground
via a spark.
For example, when the console operator
stands up he causes a static charge to build up on
his chair, (this charge could be of the magnitude of
10,000 to 15,000 volts) if he accidentally causes
the chair to contact the console table leg (zap!)
electrostatic discharge.
Another example co•1ld be
when a machine operator pushes a cart into some
ground such as the ramp guard rail, once again
(zap!) an electrostatic discharge and possible
computer failure.
Remember that static electricity
is produced by the action (motion required) of contact or separation of dissimilar materials.
If an electrostatic charge is discharged via a~ arc,
its rapid discharge can cause peak currents, of
several tens of amperes for greater than ten nanoseconds, to flow.
These currents and their associated electromagnetic fields can trigger computer
circuitry, causing malfunctions, if the discharge
occurs at or near a CPU, control unit, or I/O
frame.
This transient normally causes malfunctions in the
high speed low voltage circuits first, such as ROS,
TROS, delay lines, etc.
This article describes a method to observe the
simultaneous occurence of a machine malfunction
and a noise transient.
The procedure is:
I.

Tools Required
a.
b.

453 scope with a 10 to 1 scope probe
static loop-the following describes how to
construct a static loop
1.

NOTE:
2.

II.

use a 5 ft. piece of insulated No. 12
wire (stranded preferred vs. solid}
l\WG 14 can h~ used •:.•here ,''.WC. 12 is not
available.
remove l" of insulation from each end
of wire - form the wire into a coil
of 3 concentric loops with the bared
ends brought together - twist bare
ends of wire together - this results
in a closed 3 coil loop of wire, the
diameter of the coil will be approximately 6 11 •

Placement of the Scope and the Static Loop
The best results can be obtained by placing the
scope on top of the CPU so the screen can be
viewed from some remote spot in the computer
room.
This allows you to watch the traffic
pattern of per~onnel and carts that could
create an electrostatic discharge, while
at the same time observing the single sweep
light a.r scope trace that would indicate a
transient is being produced in the computer
room.
Attach the bared end of the static
loop to the scope probe.
Place the probe
so that the static loop hangs over the front

IBM INTERNAL USE ONLY
14-23

General
268 continued

III.

of the CPU. Do not let the loop touch any
metal. Try to keep the loop at least 2• in
front of the console. Masking tape can be
used to secure the probe to the top cover of
the CPU.

If you can definitely pinpoint the cause to the
rnove11ent of a cart or chair, then the •cause• •hould
be repeatable and you should be able to duplicate
the failure of the computer.

Scope set-up procedure

289

2.
3.
4.

Attach scope probe (with static loop) to
Ch No. 1
Set "A ' B time/Div. and Delay Time"
(grey knob) to .5 millisec scale. Turn
(red knob) CW and detent.
Set "Mode/Trigger" knob (grey knob) to
CHl", (red knob) to "Channel l only".
Set "A Triggering" as fol lows:
a.
b.
c.
d.

Source - "Internal"
"Coupling" - "AC"
"Slope" - "Plus"
Set "Level Control" (grey knob) "O"
position - Turn "HF Stabilizer" (red
knob) all the way cw.
Set "A Sweep Mode" to auto trig.
Set Horizontal Display/Magnifier (grey
knob) to "A".
(Red knob) "Magnifier" to
"Off".
Set the "Volts/Div. CHl" (grey knob) to "SO
MV". (with a 10 to l probe this iB an
actual setting of 500 millivolts). Turn
(red knob), fully CW;set the three way
switch below it to the "AC" position.
Adjust the CHl vertical "Position" (grey
knob) eo as to vertically center the
sweep.
In order to be able to view the trace from
a distance, you will want a •low but
disce.rnible trace. To obtain this, ra•et
the "A sweep Mode" switch from "Auto Trig"
to ''Single Sweep".
a.
b.
c.

189/02-19-71

Reference:

General CEM 34 Three Phase Power Configuration

Purpose:

To avoid confusion when checking power
with an AC voltmeter and with an oscilloscope.

The following table can be used to calculate the relationship between the two measu~•~entsr
Convertin~

To Convert From
RMS

A-C

Volta~es

Use the Equations

To
Peak
Peak to Peak

RMS

Peak
Peak to Peak

tpk "' 1. 414 RMS
Epk-pk • 2.828 RMS

RMS '"' , 707 Epk
.3535 Epk-pk

ftMS

RMS

ftMS

AC meters noonally represent RMS or effective voltage.
The scope is ground reference, 10 when the probe is
checking one phase, it displays a peak to peak voltage
with the center line at ground level,
SarnEle Calculation
Grounded Y cust. power
RMS x l. 414
120 x 1.414

Turn the "Scale Illumination" knob
all the way ccw.
Turn the "Focus" knob all the way ccw.
Keep "Intensity" setting as low as
possible.

Your scope is now adjusted to indicate the ambient
room noise. As a matter of fact, when the single
sweep "fired" the ambient room noise level caused it
to sweep. The ambient noise in the room is composed
of noise from the lights, air-conditioner, the computer system, etc. When these noises occur simultaneously, they algebraically add together (calibrate
the scope slightly above the room ambient noise
level, it will require a transient to trigger the
scope).

VOLTAGE MEASUREMENT WITll METER AND SCOPE

RMS

peak to ground
170V

x 1.414 x 2 •peak to peak

120 x

2.~28

33,V

PEAK VA.WE

RMS

-~------rf...-i

N
)(

GROUND

The Volte/Div. CHl and the "A Triggering Level"
contra~ knob (now at "O") were purposely set low
so as to force you t.o go through this ambient noise
evaluation procedure.
You are now ready to evaluate the ambient room noise.
At the present settings, the single sweep circuit
will be very active and require practically continuous resetting of the "Reset" green button-light.
Gradually turn the "A Triggering Level" knob clockwise (+ slope) until the reset light stays on. If
the knob turns all the way clockwise and the scope
continues to frequently sweep, turn the "Level"
control knob back to "O" and move the Volts/Div.
CHl switch up to the next level (in this case it
would be to ,l volts). Then proceed as previously,
i.e., each time the "Levol" control knob reaches
full CW position, reset it to "O" and raise the
Volts/Div. CHl knob one increment. Soon a level
will be reached where the scope might only sweep
once an hour. It is now at its critical point.
It is at this time that the next sweep might be the
one coincident with a machine error. When this
coincidence of action happens, then an evaluation
can be made as to the cause of the transient noise.

IBM INTERNAL USE ONLY
14-24

269 continued

System fails from an ESD effect of 500 .MV rather than
900 MV if the noise bursts occur in coincidence •

Customer Power

.Measurement Meter Scope.
Po in ts
_&:\S..
..l:f_

Excessive internal RF noise can be generated by a
component malfunction or from missing or loose ground
straps. External generated RF noise enters the system from the outside environment by radiation
through the air or conduction on signal, power or
ground nets.

OB
0-0
0-N

208
120

The following flowchart will provide guidance to the
Installation Planning Representative in evaluatir,g
the RF parameters of the ground network.

OB
0-0

230

OA-N

115

OB-N

199

OC-N

115

iL
3

NOTE: Scope display between OA
& oc will be 180° out of p~ase
with each other and 90° out of
phase with Phase B, rather than
the normal 120° phase relation-

ship.
OB

o-o

230

650

FLOW CHART IS ON PAGE -49

OA-G
OB-G
OC-G

212/01-21-72
191/03-19-71

27Q POST-INSTALLATION GREEN WIRE GROUND ANALYSIS

The noise susceptibility of a system can vary with
the amount of internal RF noise that is present within our uni.ts.
An RF noise pulse, such as an electrostatic discharge

(ESD) may be added algebraically to this existing RF
leve 1.
As an example, an ESD ground shift RF effect of 900
MV will cause a system failure.
RF noise in system
ESD effect

TOTAL

500 .MV
500 MV
1000 MV

IBM INTERNAL USE ONLY
14-25

General
'00 continued

Procedure to Measure Common Green Wire at the Customer's Panel
NOTE 1 - The green wire
ground of any particular
failing unit within a system
should be evaluated after
checking the conunon green wire
of the panel. Recommend that
the measurement be made on
the green wire at the unit.

Turn off main
line circuit
breaker
in cust.
panel. Note l

115 volt
neutral on 1 - - - - - - M
green wire
Remove

IPR should consult
with the customer
on any ground
modification
High resistance
ground
Locate and
Correct

Retest

flutter indicates neutral current.
256 Gen.

Not
Higher burst of RF
Possible
noise generated from--~--~~-..
external environment
Remove RF source

114-~-----t

Turn on all circuit breakers in
cust. 's panel
Sys. power off

Absorb in
transient
plate at
panel

Increase due to
noise being
by-passed by the
units filters from
the phase lines
RF

Yes

RF free ground
not available

Excessive noise suggest
following actions:
1. Locate & remove RF
source
2. Install RF filter at
panel
3. Apply transient plate
gr6und at units filter

Check unit for RF
generation, loose
frame bonding or ground
wire. Check branch
circuit ground

Higher
ObHrve the RP
t-----+<
current while
is normal
See comment section
running CPU in a
•Halt Type• loop
• This figure is based on data obtained for the 2050 CPU,
note increase
Other CPU's should be equivalent, but no data base is
available.
Comment Section

Turn on CPU only

Loose Bonds and Ground Wires

'~~~~

....~,\ ,~~

7:1') \>-.._

Even though not detectable through a DC resistance test, RF current, when involved with a loose
connection as shown above, causes a sparking type
action and can be considered as a "little RF
generator". Proper unit bonding and tight green
wire ground connections thus become important to
eliminate RF noise within the system.
RF Coupling
RF can have many diverse coupling paths internally
to the unit frame or externally to the ground.

IBM INTERNAL USE ONLY
14-26

Ganaral
~70

continued

Only RF

Discontinuities of frame members can cause standing waves to develop which may couple noise into
cables. External inter-unit cables provide capacitive coupling paths of RF to the ground plane of
the base floor. When zapping a system one must
recognize that many variable RF coupling paths ara
involved. System noise susceptibility can sometimes be upgraded by controlling the coupling pat~
and directing the RF in a particular direction.

(from a unit or a •zapper•)

Stoddart Probe
Low Readi.ng

As an example, ECA 297 on the 2040 unit provides
a 1052 table pedestal plate to dissipate electrostatic discharge into the raised floor, rather
than to have coupling into the system circuits.
3.

Source~----~

Check for Lowest Impedance Path
If experimentally controlled, you can judge the
lowest impedance path provided you have parallel
paths to ground, as indicated in the followin~
example:

Stoddart Probe

,.-~---1----t-~-11,._---+~~---~-

Higher
Impedance
Ground

High Reading

Lower Impedance
Ground

If Zl = 4z 2 then 4 times as much RF will flow through
Z2 ground leg.
4.

Transient Plate Ground
Stoddart Probe measurements indicate that the
transient plate ground is 4 to 8 times more effective in conducting or "draining off• RF current
than a 100 foot or over isolated green wire ground
from a single point, as indicated in the previous
illustration. This ratio is a function of the
frequency of RF and quality of the transient plate
installation.
Depending on the circumstance, a transient plate
ground can be effectively used to drain off a
local electrostatic discharge effect, and raise
the ESD level of susceptibility of a system.
212/01-21-72 191/03-19-71

271

STODDART PROBE

The operating circuit of the Stoddart Probe is equivalent to a radio frequency transformer.
50 ohm coax cable;;;;'

.e:!?....__rY7-

....___~t.----

Rejection of any
external pickup from
other conductors not
passing throuqh the
probe window better than
60 db.

..-

~---Be-1-·n_g__me~-a-s_u_r_e_d--~----------------'~onsidered

as a

wire ground

Electrostatic

Sh~d

(Case)____,.;t'

~Green

'-. Assume RF current pulses flow
thru to ground or earth

111 1

one turn primary

This is a current measuring instrument, but when connected through a 50 ohm impedance terminator of a receiver (453 scope), this current is displayed as a
voltage.
To convert back to a current ohms law (I •
applied.

Z is variable dependent on the frequency of the current. This transfer impedance (Z) has a relatively
constant 5 ohms value in the MHZ frequency range. At
100 KHZ frequency, the transfer impedance is one ohm,
and at 60 cycle it is .0012 ohms. This is another
way of indicating that this probe is primarily a high
frequency instrument. See the following example:

IBM INTERNAL USE ONLY
14-27

General
271 continued
Sufficient current is passed throu9h a wire being
measured to cause a 100 MV deflection on a 453 scope.
Current then is calculated.

274

P/S MAIMTE~ANCE ANALYSIS PROCEDURE
(MAP)

Purpose:

Frequency

4 MHZ

60 HZ

I • E • loo· MV • 20 milliamp
"!
--rI • E • 100 MV • 83.3 amperes

:mm-

60 HZ current should be measured with a clamp-on
anuneter1 not the Stoddart Probe.

Indicator light - consists of a clear 6W l20V
bulb and socket such as the GE 6S6. Alligator
clips should be soldered to the socket leads.
If blown fuses are available, the socket leads
may be soldered to the end caps of the fuses
instead of the clips. When using these indicators, any amount of brilliance, even a dull
filament glow, indicates trouble. Check bulbs
for open filaments before each use to prevent
erroneous branching within the MAP.

Resistor indicator - a SOK ohm 2W resistor is
soldered as above. These indicators are used
in conjunction with the CE VOM and will indicate
higher than normal leakage currents or partial
shorts that may not be detected using the indic~tor lights.
Use of the resistors will require
a reading across both at most decision blocks
referencing the indicators. Normal component
leakage current will develop approximately l.SV
across these resistors.
Although a maximum
allowable reading has not been established, it
is felt that an additional SV drop should be
suspect.

Mea•ure RF current in:

a.
b.
c.
d.

A single wire (green wire 9round)Multi conductor cable
Grounding anq bonding straps
External surface of conduit or shielded cable

Check wave form of inverter converter cables

Detect standing waves of frame members

To provide a procedure that will enable isolation and replacement of a defective component within the Converter/Inverter (C/I)
units, P/N 5703200 and P/N 5712000.

Certain sections of this MAP will require the use of
a pair of indicators in place of the inverter fuses.
It is recommended that these indicators be assembled
immediately so that they will be available when
needed. Two types can be used and are as follows:

Use the Stoddart Probe to:
1.

General

For other specific uses, see Service Aids under General CEM Index, Environmental Analysis and Instrumentation, EMC/Noise ~ower Evaluation.

191/03-19-71

;.~.:·EQUATE INSULATION OF
SOCKETS AND LEADS TO PREVEN'I SHOCK HAZARDS AND
ELECTRICAL SHORTING.

CARE MUST BE TAKEN TO INSUR!:.

SAFETY PRECAUTIONS
l.

VOLTAGES IN EXCESS OF 300V ARE PRESENT IN THE
C/I UNIT.
Observe all IBM safety practices
while working on this unit.
Remove all jewelry
and wear IBM approved safety glasses.

DO NOT FLOAT THE SCOPE. All scoping procedures
will be·done with the scope grounded to the C/I
chassis.

ALL POWER MUST BE REMOVED WHEN INSTALLING OR
REMOVING ANY WIRING.
If extension jumpers are
required due to short system cabling, tape all
connections with electrical tape before powering
up.

WAIT A MINIMUM 01'' 30 SECONDS FOLLOWING A POWER
OFF BEFORE STARTING ANY ACTION REQUIRING CONTACT
WITH ANY COMPONENT IN THE C/I UNIT.
This will
provide adequate time for the filter capacitors
to discharge.

The C/I requires two voltage inputs, 28V and
208-230V (WTC requirements may differ).
While
using this MAP, some sections require the removal or application of one or both inputs. The
following definitions will apply.
a)

NOru.JAL POWER ON or OFF - 208-230V three
phase is applied or removed by any means
available to the using system.
The 28V
input is still present on the C/I.

COMPLETE POWER ON or OFF - Both inputs are
applied or remov~d.
Use i;•· •• .. •m CB for a
complete power off.

CAUTION - ALWAYS initiate <) normal power off
before tripping system CB.

IBM INTERNAL USE ONLY
14-28

276
L lNE INTERROGA'flON OF.'/ ICE ON'. RAT I NG L HtIT"

Establish the triggering limitations of the Line
Interrogation Device (LID) Part #453599 and the
inherent delay within the circuitry of LIO to capture
a picture of a disturbance using the 451 scope camera
Part #453650.

Be sure the battery is fully charged by following
the charging procedures outlined in the operational manual.
Removal of the indicating lamps will
provide an added precaution that charge is maintained.
4.

The sensitivity knobs are adjusted to trigger on
a particular voltage level or amplitude of disturbance.

An external 12 volt battery can be used to provide
an isolated power source for LID.
With four
indicating lamps on, the current drain will be
approximately 112 milli-amperes. Current drain
from circuitry alone is approximately 34 milliamperes.

212/01-21-72 194/04-30-71

A disturbance, to be sensed by LID, must be at
least two usec in duration, and beyond the amplitude setting oi the sensitivity knobs.
Six
additional usec delay is required before the 4c;3
oscilloscope c /\ny11~; Hecording Voltmet~er, Part#
4'.d'i7l woulJ indicate, in this situation, that
a disturbance t•xistcd.
The I.IDs internal battery must be charged (indicate white) for proper operation.
The power
drain of the four indicating lamps exceed!l the
trickle-charge to the battery and will discharge
t~e battery within three hours.
If operated only
on battery (without A/C power input) and with the
four indicating lamps on, the battery will discharge within one hour.

278

ELECTROMAGNETIC COMPATil3ILITY (EMC) DESIGN /\NO
ELECTRICAL NOISE ABATEMEN'r ECs LISTING

The Cu:.tome1 Enqincer must bPcome aware and appreciate t.he imporL1nce of EHC dt•siryn.
lie must not
rcmovP. the covers, grounostraps, shields, etc., and
leave them off.
He must be able to recognize if
existing products have noise abatement B/H's
installed.
W~ere an environmental problem is suspected, check
with the Area Technical Specialist for the latest
servicing techniques.

For a guide :eference, the following listing, by
prcduct, indicates the EMC design and/or EC's
available for· ESD noise abatement.
However, this

IBM INTERNAL USE ONLY
14-29

THIS PAGE INTENTIONALLY LEFT BLANK

IBM INTERNAL USE ONLY
14,...30

Incident Reporting
The IR (Incident Report) is the primary service document that a Customer
Engineer is responsible for originating. It is used to identify and report
all maintenance activity performed on a machine or system. Its importance
cannot be stressed too highly in today's service environment. Every effort
should be made to fi II out the IR promptly, accurately and legibly. Accuracy
includes the use of the correct service code, unit and cause code and
descriptive narrative.
The IR provides input data for most of the reports used by GSD at the branch
office level. These reports provide information for workload and manpower
planning, product performance analysis, territory maintenance analysis and
for bi II i ng purposes.
Many IBM groups, department and divisions beyond the branch office need IR
data to perform their functions effectively. The major users are:
Product Pricing Groups
GSD Plant Service Planning Representatives
GSD Regional and Headquarters management
Advanced Maintenance Development
Development and Product Engineering
Reliability and Serviceability Engineering
Product Test Laboratory
Manufacturing and Quality Control
Marketing and Financial Analysis
Field and General Accounting
IR Data - GSD Field Support Uses:
1.

Weekly/Monthly Serial IR Data Listing
This is a prime tool used by Field Support for getting early indications
of potential problems. This listing is a complete list of all IR's for the
week/month in serial number order. It contains complete IR data
including the comments. This report is also available sorted by major/
minor/cause codes, or sorted by CEH time in descending order.

HSIR File (Hardware Selected IR File)
This file is updated weekly. It takes approximately 8 working days
from the time the CE sends in an IR unti I it is available at our
terminals. Data can be pulled by machine type and serial number,
by major /minor unit, or by part number. When there is a hint of
a problem, this file is used to provide the very latest data available
to define the magnitude of the problem (last 8 weeks data is available) .
The HSIR File is also very helpful to the SPR for determining the
value of suggestions.

IBM INTERNAL USE ONLY
15-1

NOTES

IBM INTERNAL USE ONLY

NOTES

IBM INTERNAL USE ONLY

NOTES

IBM INTERNAL USE ONLY

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