A24 3072 2_1402_Card_Read Punch 2 1402 Card Read

A24-3072-2_1402_Card_Read-Punch A24-3072-2_1402_Card_Read-Punch

User Manual: A24-3072-2_1402_Card_Read-Punch

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Systems

Reference Library

IBM

1402

Card

Read-Punch

This publication covers the

IBM

1402 Models 1, 2,

3,4,

5,

and 6.

Included are descriptions

of

major mechanical units, their functions

and operating controls, and special features

that

can be installed

to

expand the capabilities

of

the basic machine.

Additional publications concerning 1402 operation with various

IBM

data processing systems are listed in the SRL bibliography for

the specific system. The bibliography lists all technical reference

literature and related materials necessary for planning, program-

nring, installing, and operating the data processing system in any

configuration.

Form Number 1402-03

Form A24-3072-2

This

is

a major revision of, and obsoletes, A24-3072-1. Changes have been made

throughout

to

delete references

to

Model

Nl

and to include information about Model 6.

Specifications contained herein are subject

to

change from time

to

time. Any such change

will be reported in subsequent revisions or Technical Newsletters.

Requests for copies

of

IBM

publications should be made to your

IBM

representative or

to

the

IBM

branch office serving your locality.

Address comments concerning the contents

of

the publication to

IBM

Corporation,

Product Publications, Department 245, Rochester, Minnesota 55901.

C International Business Machines Corporation 1960, 1961, 1962

CONTENTS

IBM

1402 CARD READ-PUNCH. 5

Introduction • 5

Major Units

of

the 1402 5

Read Feed 5

Punch Feed • 5

Stackers • 6

OPERATING CONTROLS

AND

PROCEDURES • 7

Models

1,

3,

4, 5, and

6.

7

Model2 • 7

Restart Procedures • 8

Reader Errors 9

Punch Errors (1402 Modesll,

3,

4,

5,

and 6 Without Punch

Feed Read Special Features) • 10

Punch Errors (1402 Models

1,

3,4,5,

and 6 With Punch

Feed Read Special Features) •

11

Card Jam Removal 12

Transport Area • 12

Punch Feed •

13

SPECIAL

FEATURES.

15

51-Column Interchangeable Read Feed .

15

Early Card Read

15

Punch-Feed Read (Models 1,

3,4,5,

and 6) •

17

Read Punch Release.

17

Column Binary, Read and Punch Column Binary, Binary

Transfer

17

Timing Summary

17

IBM

1402 Card Read-Punch

INTRODUCTION

The

IBM

1402 Card Read-Punch provides punched-card

input and

output

for several

of

the

IBM

data processing

systems.

It

is available in six models. Model 1 is used with

Models

A,

B,

C,

E, and F

of

an

IBM

1401 Data Processing

System; Model 2

is

used with the

IBM

1410, 7010, 7040,

and 7044 Data Processing Systems; Model 3

is

used with

the

IBM

1460 Data Processing System; Models 4 and 5

are used with the

IBM

1401 Model G Data Processing

System; and Model 6

is

used with the

IBM

1401 Model H

Data Processing System.

Each model

of

the 1402 has a read feed, a punch feed,

and

five

card stackers. The stackers are

so

controlled

that

three stackers can serve each feed.

MAJOR UNITS OF THE 1402

Read Feed

The read feed

on

Models 1, 2, and 3 can read 800 cards a

minute; the read feed on Models 4, 5, and 6 can read 450

cards a minute. The actual reading speed during an appli-

cation depends upon the processing time required for each

card.

The read feed

is

at the right end

of

the 1402 (Figure 1).

On Models

1,

2,

3,4,

and 6, a file feed tray permits the

loading

of

approximately 3,000 cards at one time. Small

groups

of

cards (200 or fewer) can be placed directly into

the read hopper

by

lowering the joggler gate, carefully align-

ing the cards and card weight in feeding position, then rais-

ing the joggler gate

to

allow card feeding or runout. Model

5,

which does

not

have the

me

feed tray and joggler gate,

has a read hopper capacity

of

approximately 1,200 cards.

In all other respects. Model 5

is

identical

to

Model 4.

A card

is

read in three machine cycles. On the first cycle,

the card moves from the read hopper

to

the read check

station. During the second cycle, the card passes through

the read check station, where a hole count

is

established,

and stops at the read station. On the third cycle, the card

moves through the read

station~

the hole count

is

proved,

and data read from the card enters the processing unit's

core storage or, in Model 2, the read buffer. In all models

except 2, the card continues past the read station

to

the

normal read (NR) stacker unless program-directed

to

stacker

1 or stacker 2 within 10 milliseconds after the read com-

mand. Model 2 has a separate prestacker station where the

card just read can await stacker selection without a time

limit (Figure 2).

IBM

1402 CARD READ-PUNCH

Joggler

Gate

Figure

1.

Read Hopper, Models 1, 2, 3, 4, and 6

The read feed on Model 3

is

equipped with an idle con-

trol timer

that

turns

off

the read feed drive motor when-

ever 30 seconds elapse without a read command. The motor

restarts automatically when the next read instruction

is

issued.

Punch Feed

All

models

of

the 1402 have a maximum punching speed

of

250 cards a minute. The actual number

of

card pro-

cessed depends on the processing time required between

punch commands. The punch hopper, at the left end

of

the 1402, has a capacity

of

approximately 1,200 cards.

5

Punch

Hopper Punches Punch

Check Select

Stacker

Pres

tacker Station

Model

2

Select

Stacker

Read

Check

Read

Hopper

NormaIUUUUUNO~OI

--~

Punch

Read

~---

Blank

Station

Figure

2.

Card Feed Schematic

NP

4

A punch operation requires four machine cycles. The

card moves from the punch hopper

to

a blank station on

the first cycle. This blank station

is

reserved for the reading

brushes associated with the Punch Feed Read special fea-

ture when

that

feature is installed on the 1402. During

the second punch cycle, the card passes through the blank

station and stops at the punching station. The card

is

punched during the third cycle; a hole count is established,

and the card stops at the punch check station. On the

fourth punch cycle, the card moves through the punch

check station, where the hole count

is

proved, then passes

into the normal punch (NP) stacker, unless program

directed into another stacker (see Figure 2).

Models 3, 4, 5, and 6 are equipped with a punch idle

control timer

that

turns

off

the punch motor whenever 30

seconds elapse without a punch command. The punch

motor restarts automatically when the next punch in-

struction

is

issued.

Stackers

The

IBM

1402 has

five

radial stackers (Figure 3), each with

a capacity

of

approximately 1000 cards. Should a stacker

become full, the 1402 stops and a stacker light signals the

operator. Cards can be removed from a stacker without

interrupting the operation.

6

8/2

NR

Read

Figure 3. Radial Stackers

Cards from the read feed normally

go

into the NR

stacker,

but

can be directed

to

stacker 1 or stacker 2

by

the program. Cards from the punch feed can be rerouted

from the NP stacker into stacker 4 or stacker 8 under

program control.

When programming a 1402, note

that

cards from

both

feeds can be selected

to

the common 8/2 stacker,

but

machine timing considerations make merging operations

impractical on a standard 1402.

Models

1,

3, 4, 5, and 6

The keys, lights, and switches

on

Models

1,3,4,

5, and 6

are alike (Figure 4). Several

of

the controls are common

to

the entire 1402; others are specifically for the reader

or punch portions.

Common Controls

Start Key*

is

used

to

initiate machine operation after a

manual, programmed, or automatic stop.

Stop Key*

is

used

to

stop the system.

If

a program step

is

in process,

it

is completed before operation stops.

Check Reset Key must be pressed

to

reset any punch or

read error indication (punch check, reader check, punch

stop, reader stop, transport error, or validity error),

so

that

the start key will be effective for resuming operation. The

check reset key

is

effective only when the feed unit in

which the error occurred is cleared

of

cards.

Power Light is on when power is supplied

to

the machine.

Fuse Light,indicates

that

something in the 1402 circuitry

caused a signal fuse

to

burn out. A customer engineer

should be notified.

Transport Light indicates a card jam in the transport area.

After the card jam

is

cleared, the light turns off. Any cards

beyond the read brushes in the read feed

(or

the punch

check brushes in the punch feed) have been read (or

punched) and checked.

* Interchangeable with the same key on a system console or on

an

IBM

1403 Printer.

PUNCH

OFF

PUNCH

ON

NON

PRO

RUN

OUT

PUNCH

CHECK

PUNCH

STOP

FUSE

CHIPS

STACKER

Figure 4. Operator Controls, Models

1,

3,4,5,

and 6

CHECK

RESET

OPERATING CONTROLS AND PROCEDURES

Stacker Light signals

that

a stacker is full. When enough

cards are removed

to

allow the stacker slide

to

return

beyond the stacker trip device, the stacker light turns

off. Operations can be resumed

by

pressing the start key.

Reader Controls

Load Key

is

used

to

start the loading

of

program instruction

cards in the read feed. Pressing the load key operates

the

read feed until a card has passed the read station. The

read-in area (positions 1-80

of

storage)

is

automatically

cleared, and a word mark is set in address 001.

After the first card

is

read at the read station, the

program begins

by

executing the instruction punched in

the first columns

of

the card. Continued operation, in-

cluding further feeding and reading

of

program cards,

is

under program control and does

not

require operator

intervention.

When the punch

onloff

switch

is

on, operating the load

key also starts the punch.

Nonprocess Runout Key (NPRO)

is

used

to

clear cards from

the read feed. The key

is

operable only when the read

hopper and

me

feed tray are empty (or manually prevented

from feeding cards), and the joggler gate is closed. In normal

circumstances the last two cards

that

enter the NR stacker

have not been read.

Note: The NPRO key should be operated before loading

cards into the read feed for the first time after power has

been turned on.

Reader Stop Light signals a card-feed failure, a card jam,

or a clutch failure.

It

also comes on

if

the NPRO key has

been pressed. The stop light can be turned

off

by

pressing

the 1402 check reset key after the condition causing

the

stop has been corrected.

POWER

TRANSPORT

VALIDITY

READER

CHECK

READER

STOP

NON

PRO

RUN

OUT

READER

OFF

READER

ON

7

Reader Check Light turns on

if

(1) a hole-count error

is

corrected during card reading or (2) the read release

time

is

exceeded without the issuance

of

a read command. *

This light can be turned

off

by

performing an NPRO opera-

tion, then pressing the 1402 check reset key. When opera-

tion stops and the reader check light

is

on, the last card

in the NR stacker has

not

been processed and must be re-

entered after the error

is

corrected.

Validity Light turns on

if

an invalid character

is

detected

during a read operation. The system stops at the end

of

the read. The validity light can be turned

off

by

pressing

the 1402 check reset key.

If

the invalid punching in the

card also causes a parity error, the process and storage

lights on the system console also turn on.

When the validity light

is

the only 1402 light on when

the stop occurs, the last card in the NR stacker has

not

been processed and must be re-entered after the error has

been corrected.

If

the I/O check stop switch on the system

console

is

off

and a validity error

is

detected during a read

operation, the validity light turns on

but

the operation does

not

stop. A reader error indicator

is

available for program

testing and reset with the I/O check stop switch off.

Note: When the Punch Feed Read special feature

is

in-

stalled, the validity light can also indicate invalid punching.

Reader On/Off Switch controls the read feed

of

the 1402.

When the switch

is

off, the read feed

is

inoperable.

Punch Controls

Nonprocess Runout Key (NPRO)

is

used

to

clear the punch

feed

of

cards when the hopper is empty.

Of

the last three

cards in the

NP

stacker after a normal nonprocess runout,

the first has

not

been checked and the last two have

not

been punched. The NPRO key should be operated before

loading cards into the punch feed for the first time after

power has been turned on.

* This

is

a programming problem. After a program using the

Read Punch Release special feature has been completely

checked, this condition should

not

occur.

Model 2

PUNCH

READY

PUNCH

CHECK

CHIPS

STACKER

POWER

Punch Stop Light signals a card-feed failure, a card jam,

or a clutch failure;

it

also comes on

if

the NPRO key has

been pressed. The light can be turned

off

by pressing the

1402 check reset key after the condition causing the stop

has been corrected.

Punch Check Light turns

of

if

(1) a hole-count error

is

detected in the punch feed, (2) either the A-register or the

B-register detects a parity error during a punch operation,

or (3) punch release time

is

overextended. * The punch

check light can be turned

off

by performing an NPRO

operation, then pressing the 1402 check reset key.

Chips Light turns on and the 1402 stops when the chip

box

is

full or improperly positioned. The light turns

off

after

the condition

is

corrected. Operation can be resumed

by

pressing the start key.

Punch On/Off Switch controls the punch feed. When

the

switch is off, the punch

is

inoperable; when on, and all the

interlock circuits in the punch are satisfied, the machine

operates.

Model 2

Figure 5 shows the operating keys and lights for the 1402

Mode12.

Common Controls

Stacker Light indicates a full stacker.

Tro

reader unit and

the punch unit

both

stop when a stacker becomes full.

Fuse Light indicates a blown fuse in the reader or punch

unit. A customer engineer should be notified

of

the

occurrence.

Power Light indicates

that

power

is

being supplied

to

the

1402.

Transport Light indicates a card jam in the stacker area.

All card feeding in the 1402 stops until the jam

is

removed.

VALIDITY

READER

READY

READER

CHECK

PUNCH

STOP

FUSE

TRANSPOR

T

READER

STOP

Figure 5. Operator Controls, Model 2

8

Reader Controls

Reader Start Key (initial operation) feeds three cards into

the read feed, mls the reader buffer with the contents

of

the first card, and turns on the reader-ready light. During

an operation, pressing the start key after a reader stop

condition turns on the reader-ready light, and allows cards

to

continue feeding under program control. Whenever cards

are removed from the read feed hopper and the end-of-me

key

is

not operated, pressing the start key moves the re-

maining two or three cards

to

the stacker area. This runout

operation requires

that

the joggler gate be closed.

Reader

Sto~

stops the reader and turns

off

the reader-

ready light.

End-of-File Key causes the end-of-file latch in the channel

to

be

turn(~d

on after data transfer from the last card. The

next read instruction

is

interpreted

as

a

NO-OP

and reports

the end-of.·me condition

to

the channel. This key

is

back-

lighted.

Whenever the end

..

of-me key

is

pressed, the card reader

operates in one

of

these ways:

1.

With four or more cards in the read hopper, all cards

are processed and run into a stacker. Operating the

stop key or processing the last card causes the end-of-

me

condition

to

be reset.

2.

With three cards remaining in the feed, a card-read or

card-feed instruction before operation

of

the end-of-

me key causes the program

to

set the not-ready I/O

channel status indicator. Pressing the end-of-me key

and then the start key allows the last three cards

to

be processed and

lun

into a stacker. Operating the

stop key or processing the last card causes the end-

of-me condition

to

be reset.

3. With one, two, or three cards in the read hopper,

pressing the end-of-me key and then the start key

feeds the card or cards, and turns on the reader-

ready light after the first card passes the second

read station. The card or cards are processed and

run into a stacker. Operating the stop key or

processing the last card causes the end-of-me

condition

to

be reset.

Reader Ready Light indicates

that

the reader

is

either

operating or ready

to

operate under program control.

Validity Ligh! shows that an invalid character has been

detected during a feed operation. The light remains on

until the next feed instruction

is

started. During the read

instruction, the invalid character

is

transferred

to

storage

along with valid data.

Reader Stop Light indicates a feed failure or card jam

during a feed operation. When this occurs, the reader

stops and the reader-ready light turns off.

Reader Check Light indicates the detection

of

a hole-count

error, parity error, or buffer timing error during a data

transfer operation. The light remains on until the next

feed instruction

is

started. During the read instruction,

the data

is

transferred from buffer

to

storage, and the

processing unit turns on a channel indicator for the

program

to

test.

Punch Controls

Punch Start Key

is

used

to

feed two cards into the punch

feed and turn on the punch-ready light. After a punch

stop condition, pressing the start key turns on the punch-

ready light, and allows punching

to

resume under program

control. When the cards have been removed from the punch

feed hopper, pressing the start key moves the three cards

remaining in the punch feed

to

the

NP

stacker. The first

card that enters the

NP

stacker

is

unchecked; the other

two are unpunched.

Punch Stop Key

is

used

to

stop the punch.

It

turns

off

the

punch-ready and end-of-me lights.

Punch Ready Light indicates

that

the punch

is

either

operating or ready

to

operate under program control.

Punch Stop Light indicates a feed failure or card jam

during a punch operation. When this occurs, the punch

stops and the punch-ready light turns off.

Punch Check Light indicates the detection

of

a hole-count

error, parity error, or buffer timing error during a punch

operation.

Chips Light shows

that

the chip box

is

full or not in place.

The light goes

off

when the condition

is

corrected. To

resume operation, the reader start key must be pressed.

Restart Procedures

The restart procedures in this publication apply mainly

to

Models

1,

3,4,

5, and 6. These models usually require

operator attention when error conditions arise. Procedures

for restarting Model 2 are explained in the SRL publications

for the appropriate system. This model requires a minimum

of

operator attention, because most error correction rou-

tines can be programmed.

9

Reader Errors

Errors detected in the read feed cause the reader stop,

reader check, or validity lights

to

come on, either singly

or in combination.

Reader Check Light On

1.

Remove cards from the read feed hopper.

2.

While lifting cards in the

me

feed

to

prevent them

from feeding into the lower magazine, run the two

cards

out

of

the read feed

by

use

of

the NPRO key.

3. Press CHECK RESET on the 1402.

4.

Remove the last three cards from the NR stacker.

Check and,

if

necessary, correct the first card.

If

a

hole-count error has occurred, use a storage scan

operation

to

determine the position in error.

S.

Place the three cards removed in step 4, then the

cards removed from step 1 into the read feed

hopper.

6. Press START.

Reader Stop Light On

When operation stops because

of

either a card feed failure

or a card jam, and only the reader stop light is on, cards

in the stackers and beyond the reading brushes in the

read feed have been processed.

If

the reader stop light is

on and neither a feed failure nor jam exists, a clutch failure

has probably occurred.

Th

e last card in the

NR

stacker and

any other cards past the reading brushes in the read feed

may

not

have been processed.

1.

Remove cards from the read hopper.

2. Remove any jammed cards from the read feed (refer

to

"Card Jam Removal" in this publication).

3.

While lifting cards in the

me

feed

to

prevent them from

feeding into the lower magazine, run any undamaged

cards

out

of

the read feed

by

use

of

the NPRO key.

4.

Press CHECK RESET on the 1402.

S.

Duplicate any damaged cards.

6. Place in the read hopper any cards

that

were in the

read feed between the read check and read stations,

and replace the cards removed from the hopper in

step

1.

7. Press START.

Validity Light On

When this light is

on

and a feed cycle has occurred in the

read feed, the last card in the NR stacker contains invalid

character. This card has

not

been processed. To correct and

refeed the error card, follow the same procedure

as

de-

scribed for "Reader Check Light" (except for the storage

scan operation mentioned in step 4).

10

Reader Stop/Reader Check/Validity Lights On

Whenever the reader check or validity light comes on with

the reader stop light, the last card in the NR stacker caused

the error and must be refed. However,

if

the cause

of

these

lights

is

a card jam between the read station and the stacker,

the cards must be examined

to

determine which card was

the last card correctly processed; all cards following

that

card must be refed.

1.

Remove cards from the read hopper.

2.

Remove any jammed cards from the read feed.

3.

While

lifting cards in the file feed

to

prevent them

from feeding into the lower magazine, run any un-

damaged cards

out

of

the read feed

by

use

of

the

NPROkey.

4.

Press CHECK RESET

on

the 1402.

S.

Duplicate any damaged cards.

6. Replace cards in the

read-

hopper in this order.

a.

The last card stacked in the NR pocket.

b. The cards removed or run

out

from the read feed,

in their original order.

c.

The cards removed from the hopper.

7. Press START.

Punch Errors (1402 Models

1,

3,

4,

S,

and 6 Without Punch

Feed Read Special Feature)

Punch Check Light On

1.

Remove cards from the punch feed hopper.

2.

Run

out

the three cards in the punch feed.

3. Press CHECK RESET on the 1402.

4 Remove the last four cards from the

NP

stacker.

S:

Visually check the first

of

these four cards (discard

the other three), and correct,

if

necessary.

If

the B-light

on the system console

is

on (indicating a B-register

parity error), perform a storage scan operation, starting

at position 101,

to

determine and correct the position

(l01-180)

that

contains the parity error. Note the

1-

address for restarting after the scan.

6. Replace the cards removed from the punch feed hopper

in step

1.

.

7.

To resume operation, enter the address

of

punch opera-

tion code, set the mode switch

to

RUN, and press

START. The last punch cycle repeats and information

in the punch storage area

is

repunched.

Punch Stop Light On

1.

Remove cards from the punch feed hopper.

2.

Remove any jammed cards from the punch feed and

run

out

any undamaged cards.

3. Press CHECK RESET on the 1402.

4. Discard the last card punched, because the data will be

repunched.

S.

Duplicate any damaged cards.

6. Replace the cards removed from the punch feed hopper

in step

1.

7.

Press START.

Punch Stop and Punch Check

lights

On

If

any other light

is

on with the punch stop light, visually

check the last card in the

NP

stacker and correct

it

if

necessary. In the case

of

a card jam between the punch

check station and the stacker, check the last card read

by the punch check brushes and correct,

if

necessary.

To resume operation, after clearing any card jams, follow

the same procedure

as

described for "Punch Check

light

On.n

Punch Errors (1402 Models

1.

3, 4,

52

and 6 With Punch

Feed Read Special Feature)

Punch Cheek

light

On

1.

Remove cards from the punch feed hopper.

2. Run out the three cards in the punch feed.

3. Press CHECK RESET on the 1402.

4. Remove the last four cards from the NP stacker.

S.

Duplicate inte new cards, the prepunched data from

the first two cards.

If

the B-light on the system console

is

on (indicating a B-register parity error), perform a

storage

s.can

operation (starting at position 101)

to

determine and correct the position (101-180)

that

contains the parity error. Note the I-address for re-

starting after the scan.

6. Place the two duplicated cards and the third and

fourth cards in the punch feed hopper. Replace the

cards removed from the hopper in step

1.

7. Press START RESET on the system console.

8. Enter a restart address

to

start

proceSSing

at

the program

instruction

that

had previously caused the first card

to

be read by the punch feed read brushes. (Reconstruct

internal data,

if

neeessary.)

9.

Set the mode switch

to

RUN and press START

to

resume operation.

Punch Stop Light On

When

only the punch stop light

is

on and a punch-feed-

read operation has occurred, all cards in the punch feed

between the hopper and the punch check station should

be reprocessed. Cards beyond the punch check station

and in the stackers have been punched and checked. A

card between the punch and the punch check stations

has not been checked; operation should be restarted

so

that

this card

is

repunched.

;Note:

If

neither a feed failure nor a card jam caused the

punch stop light

to

turn on, the stop may have been due

to

a clutch failure. The last card in the

NP

stacker should

be checked.

1.

Remove cards from the punch feed hopper.

2.

Remove any jammed cards from the punch feed, and

run out any undamaged cards.

3. Press CHECK RESET on the 1402.

4. Duplicate, into a new card(s), the prepunched data

in the card (or cards, in the case

of

a card jam)

that

was

between the punch and punch check stations when

operation stopped. This card

was

punched

but

not

checked and must be reprocessed.

S.

Place the duplicated card(s), and all other cards removed

from the punch feed (between the hopper and the punch

station), into the punch feed hopper in their original

sequence.

6. Replace the cards removed from the hopper in step

1.

7.

Press START RESET on the system console.

8. Enter a restart address

to

start processing at the program

instruction that had previously caused the first card

(duplicated in step 4)

to

be read by the punch feed

read brushes. (Reconstruct internal data,

if

necessary.)

9.

Set the mode switch

to

RUN and press START

to

resume operation.

Validity

light

On

When only the validity light

is

on and a punch-feed-read

operation has occurred in the punch feed, the card just

read at the punch feed read station contains an invalid

character.

1.

Remove cards from the punch hopper.

2.

Run out the three cards in the punch feed.

3. Press CHECK RESET on the 1402.

4. Remove the last three cards from the NP stacker.

S.

Visually check the first

of

these three cards. (This card

had been punched

but

not

checked when the error

occurred.) Correct this card,

if

necessary, then replace

it

in the stacker.

6.

Correct the validity error in the second card (the error

card).

7. Place the second and third cards in the punch hopper,

and replace the cards removed from the hopper in

step 1.

8. Press START RESET on the system console.

9. Enter a restart address that will start processing at the

second card

to

be read by the punch feed read brushes.

10.

Set the mode switch

to

RUN and press START

to

resume operation.

Validity and Punch Check Lights On

If

the validity and punch check lights are

both

on, two or

more error conditions have been detected in the punch

feed. Follow the same restart procedure

as

described for

11

"Punch Check Light On." Correct the invalid character in

the card just read by the punch feed read brushes (third

card removed from the

NP

stacker in step 4).

Punch Stop/Punch Check/Validity Lights On

If

any other light

is

on with the punch stop light, and a

punch-feed-read operation has occurred, two or more error

conditions have been detected in the punch feed. To re-

sume operation, after clearing any card jams, follow the

same procedure

as

described for "Punch Check Light On."

Note:

If

cards have jammed between the punch check

station and the stacker, the last card read by the punch

check brushes should be the first card reprocessed. Du-

plicate the prepunched data from this card into a new

card. Also duplicate into new cards the prepunched data

in all other cards

that

have passed the punch station. Place

the duplicated cards and the other cards removed from the

punch feed into the punch feed hopper in their original

sequence.

Punch

Check

Brushes

Figure 6. Access

to

Transport Area

12

CARD

JAM

REMOVAL

Most card jams in the

IBM

1402 are caused

by

rubber bands,

staples, and paper clips run in with the cards; cards with

bent corners or frayed edges; missing card weights; and

improperly-positioned brusheso

By

following certain guides in the removal

of

card jams,

injury

to

the operator and damage

to

the machine can be

avoided. However, because

of

the varying circumstances

involved in removing card jams, step-by-step procedures

cannot be given.

Transport Area

When confronted with a jam in the transport area, first

turn

off

the power

to

the 1402 reader and punch units, then

raise the

me

feed tray and open the

top

covers

of

the 1402

(Figure 6). The jammed cards should be removed

as

nearly

intact

as

possible,

to

facilitate their replacement. A hand

feed wheel, inside the front cover

of

the 1402, allows the

operator

to

slowly advance the read feed and transport

(Figure 7).

Read

Brushes

File Feed

Tray (Raised)

Read

check

Brushes

Punch

Feed

Manual.,A

Trip

Lever

Punch

Feed

Crank

Figure

7.

Front

View (Covers Open)

~rote:

Should

it

be necessary

to

remove the read check,

read, punch check, or punch feed reading brushes, care

should be taken

to

avoid contact between the reading

surface

of

the brushes and any other part

of

the 1402.

Such contact may damage the individual brushes or, with

the main system power still on, blow a fuse. Replacement

of

the brushes requires equal care. The hand feed wheel

should be rotated

as

the read feed brushes are reinserted.

After removing the jam, make sure

that

all latching pins

are snapped into place before running cards out, entering

new cards, and resuming operation. Repetitive reader or

punch check conditions, immediately after a brush block

has been replaced and operation restarted, may indicate

damaged or short-circuited brushes.

Punch Feed

If

a jam should occur in the punch feed, first

turn

off

power

to

the 1402 reader and punch units, then open the

top

Hand

Feed

Wheel

covers

of

the 1402, and

try

to

remove the jam from

the

top.

If

this is

not

possible, trip the manual clutch lever behind

the front cover, crank the feed

to

a setting between 3350

and 3500, and remove the punch die (Figure 8).

Punch Die Removal

The punch die can be either

of

two types: side-locking

or top-locking. The side-locking die is characterized

by

a

pair

of

handles on the underside

of

the die assembly; the

top-locking die has one handle, shaped like an inverted T.

Before the punch die can be removed, the plastic chip

funnel under the die must be taken

out

and, on machines

with a lowering frame, the lowering-frame knob must be

rotated. To remove the side-locking die, grasp the two

handles in one hand and squeeze them together. This

releases the die from its attachment

to

the punch frame.

With the die removed, reach into the space vacated

by

the

die assembly and remove any cards

that

have jammed there.

The top-locking die is removed in the same manner, only

13

Figure

8.

Punch Die (Top-Locking)

14

Top-

Lock

i

ng

Die Handle

Chip Funnel

the handle (inverted T)

is

turned instead

of

squeezed. (The

ejection trigger can be used

to

free the top-locking die

after the handle has been loosened.)

Punch Die Replacement

When all cards and card fragments have been removed from

the punch feed, the die can be replaced. The side-locking

die requires squeezing the handles together, pushing the

die into place, then spreading the handles apart until the

die snaps into place.

If

the die

is

not

properly seated, the

machine will

not

run. The top-locking die is reinstalled

by

pushing

it

into place, then tightening the handle. Caution

should be used when testing the replacement

of

the die.

Carefully pull down on the handle;

if

the die is properly

seated,

it

will not come

out

when the handle

is

pulled.

After replacing the die, raise the lowering frame.

Note: Make sure all covers are closed. Interlock switches

prevent machine operation when any cover

is

open.

51-Column Interchangeable Read Feed

The 51-Column Interchangeable Read Feed (including

me

feed) permits feeding either 51-column cards or 80-column

cards into the read feed

of

the

IBM

1402 Models 1, 2, 3, 4,

and 6. Conversion

of

51-column cards into 80-column

cards prior

to

entry into the data processing system

is

not

necessary.

During 51-column card operations, the 1402 performs

all normal functions except selection

of

cards into the

8/2 stacker.

The

me:

feed and the NR and 1 stackers must be

positioned for 51-column cards

by

the operator.

Reading and Storage Considerations

Information

is

read from the 51-column cards

by

reading

brushes

15

through 65. A factor

of

14 relates the card

column

to

its corresponding position in core storage.

When the NR stacker is adjusted for 51-column operation,

storage

of

information

is

automatically regulated

to

read

into storage addresses 015 through 065. Storage address

014

is

used for cycle timing; all other positions are un-

altered.

In

Mod(~ls

1,

2, 3, 4, and 6, the loading

of

instructions

from 51-column cards

is

also automatically regulated

once the NR stacker has been adjusted. Operation

of

the

load key automatically causes a word mark

to

be entered

into storage position 015, word marks

to

be cleared from

pOSitions 016-065, and the I-register

to

be loaded with

storage address 015. (The factor

of

14 must be added

to

the standard read-in area addresses

as

referenced by the self-

loading program cards.)

Note: The operator should be aware

of

these precautions

concerning 51-column card operations:

1.

Left-scored 51-column cards must

not

contain punches

in columns equivalent

to

columns 28 and 29

of

an 80-

column card. These columns are at the edge

of

a 51-

column card, and misfeeding may result

if

they are

punched. The first punchable position

of

a left-scored

51-column card corresponds

to

column

30

of

an 80-

column card.

2. When changing from 51-column

to

80-column operation,

the operator should run a few 80-column cards through

the read feed

to

ensure

that

the card transport area

is

clear.

SPECIAL FEATURES

Setup Procedures, File Feed and Stackers

The

me

feed and stackers NR

(Rl)

and 1 (R2) are set up

for 51-column card operations

as

follows:

1.

Position the hopper sideplates in the hopper, and fasten

the sideplates

to

the hopper with the knurled thumb-

screws.

Be

careful

not

to

interfere with the bedplate

springs.

2.

Place the

me

feed tray guides

on

the

me

feed tray.

3. Reach into each stacker (Figure 9),

NR

and 1, and using

the finger hole in the stacker guides, .pull each guide

forward and down until

it

latches.

4. Raise the small cover just above the NR and 1 stackers

and partially lower the pivot plate assemblies. Slide each

assembly

to

the rear

of

its stacker until

it

latches,

then

pivot the assembly all the way down.

5.

Place 51-column cards in the

me

feed tray and begin

operations.

Note: When reverting

to

standard 80-column card opera-

tion, follow the setup procedures in reverse sequence.

Handle and store the file feed tray guides and the hopper

sideplates carefully.

Early Card Read

The Early Card Read special feature

is

available only for the

IBM

1402

Modell;

it

is

a standard feature

of

Models 3, 4,

5,

and 6.

Without Early Card Read, a standard

Modell

can attain

its maximum reading rate

of

800 cards per minute only

when successive read cycles occur every 75 milliseconds, and

the application does

not

require more than 10 milliseconds

of

each cycle for process time (the time between reading a

card and issuing the next read instruction).

For

processing

routines

that

require between 10 and 85 milliseconds

of

process time, one complete read cycle is skipped and the

maximum reading rate

is

400 cards per minute.

With Early Card Read, the effect

of

increased processing

time is minimized. Additional clutch points (points at which

a new read cycle can begin) are provided at 25 millisecond

intervals. Consequently, a processing routine

of

11

milli-

seconds would cause only one-third (25 ms)

of

a normal

read cycle

to

be skipped, and a higher reading rate, 600

cards per minute, would be attained (Figures 10 and 11).

15

Figure

9.

Stacker Adjustment, 51-Column Cards

Standard

Machine

I·

Clutch

Point

4~

Read

Start

Time

21

ms

Read

Cycle

75

ms

Card

Reading

Time

44

ms

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

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

Early

Card

Read

Special

Feature

Additional Additional

Clutch

Points

Clutch

Points

, T

~25m'l

I I

Read

Start

Time

Card

Reading

Time

21

ms

I

44

ms

I

I I

I I

Note:

Read

start

time

is

available

as

process time

if

the

Punch

Release

special

feature

is

installed.

Figure 10. Read Cycle Timing

16

·1·

Clutch

Point

.~

Process

Time

10

ms

II

II

/;

II

"

1/

//

II

I

I

II

II

Ii

II

II

II

I,

"

Ii

1/

1/

II

1/

//

II

/1

-

~===~

----

75

ms

Pro cess

time

over

10

ms

an

d

under

85

ms

causes

one

read

cy

cle

to

be

skipped;

speed

drops

to

400

cpm.

·1

Clutch

Point

85

ms

---------------1

---------

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

Process

Time

10

ms

35

ms

Process

time

over

10

ms

and

under

35

ms

causes

1/3

read

cycle

to

be

skipped;

speed

drops

to

600

cpm.

Addit

ional

Additional

Clutc

h Points

Clutch

Points

, ,

L

25

ms

---.-J

I I

I I

I I

I I I

Maximun Milliseconds Cards per Cards per

Processing Between Minute Minute

Time

Card

Read

(1402

without

(1402

with

Required Commands Early

Card

Early Card

(Milliseconds) Read Feature) Read Feature)

10

75

800 800

35

100

400

600

60

125

400

480

85

150

400

400

110

175

266

342

135

200 266

300

160

225

266 266

185

250

200 240

Figure 11. Effect

of

Processing Time on Reading Speed

Punch Feed Read (Models

1,3,4,

5,

and

6)

In some applications,

it

is

desirable

to

read information

into the system, then calculate and punch the results in

the same card from which the input data was read. The

Punch Feed Read special feature permits reading a card at

the punch-feed-read station while the card ahead

of

it is

being punched. For this

operation~

a special set

of

SO

reading brushes

is

added

to

the 1402 punch feed, one

station ahead

of

the punch station (the blank station in

Figure 2). The d-character

"R"

specifies

that

the card

is

to

be read from the punch side

of

the 1402.

The normal read area in Models 1, 3, 4, 5, and 6 (storage

locations 001-0S0) receives the information from the Punch

Feed Read in the same manner

as

from the read feed. Val-

idity and hole-count checks are made on each card column

read from the punch-feed-read brushes. (MLP card codes

Gause

validity errors

if

read by the punch-feed-read brushes

on an otherwise standard 1402.)

Punching operations with Punch Feed Read are the

same

as

for a basic 1402. Storage positions 101-IS0 are

specified

as

the punch area in systems using Models

1,

3,

4, 5, and 6, and a hole-count check is made

at

the punch

check brushes. The hole-count check

of

prepunched data

is begun at the punch read

stati~)ll

and

IS

completed at the

punch check station after punching has occurred.

Punching in prepunched columns

is

acceptable, provided

that

(1) the resultant character is valid, and (2) the punches

read at the punch-feed-read station are

not

repeated. An

X,

for example, could be punched in a card column

that

already contains a 2,

but

punching a K (X and 2),

if

either

an X or a 2 was already in the card, would result in a hole-

count check..

!~ead

Punch Release

The Read Punch Release special feature is available for those

IBM

data processing systems using the 1402 Models 1,

3,4,

5,

and 6. With this feature, card movement in the read feed

can be initiated

by

either the normal read instruction or the

start read feed (SRF) instruction. When the SRF instruction

is used,

21

milliseconds

of

read start time is made available

to

the processing unit.

Card movement in the punch feed can be initiated

by

either the normal punch instruction or the SRF instruc-

tion.

Use

of

the SRF instruction makes 37 milliseconds

of

punch start time available

to

the processing unit.

The programmer should note

that

failure

to

give

the

read instruction within

21

milliseconds after an SRF com-

mand will result in a reader check. Similarly, failure

to

issue the punch instruction within 37 milliseconds after an

SRF command will cause a punch check.

Column Binary, Read and Punch Colunin Binary, Binary

Transfer

Column Binary (IBM 1401 Models

B,

C,

E, and F systems),

Read and Punch Column Binary (IBM 1410 and 7010 sys-

terns), and Binary Transfer (IBM 1460 systems) allow the

1402 Models 1, 2, and 3

to

read and punch any combina-

tion

of

punches in a given card column. Validity checking

by the 1402

is

suspended during binary operations.

Timing Summary

Read cycle timings for Models

1,

2, and 3 are shown in

Figures 10 and 11, under the discussion

of

the Early Card

Read special feature. Figure 12 shows the read cycle timing

and reading speeds in cards a minute for Models 4,

5,

and

6.

The punch timing chart for all models in shown in Figure

13.

Clutch Points

33

ms

78

ms

22

ms

I 44.33

ms

1 44.33

ms

144.33

ms

Read Card

1-4---Clutch

Impulse

Time----_.

Access Reading J

Time Time

f-+--

133

ms

(450

cpm)

1-4---

177

ms

(338

cpm)

----"'"'

...------

222

ms

(270 cpm)

______

~

......

------

266

ms

(225 cpm)

--------~

Figure 12. Read Cycle Timing Chart, Models

4,5,

and 6

17

240

ms

37

ms

181

ms

I 22

ms

Punch Start

Time

Punching (Punch Only Operation) I Processing

Time

37

ms

184

ms

19

ms

Punch Start

Time

Punching

(PFR

Op

eration) Processing

Time

Figure 13. Punch Timing

18

A24-3072-2

International

Business

Machines

Corporation

Data

Processing

Division

112

East

Post

Road,

White

Plains,

N.Y.106Ot

[USA Only]

IBM World

Trade

Corporation

821 United

Nations

Plaza,

New

York,

New

York

10017

[

International]