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User Manual Lrp830

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OPERATOR'S MANUAL
LRP830-Series
Long-Range Passive
Reader/Writers
Manual Revision 3, July, ‘00
Publication #17-1271
Escort Memory Systems Warranty
Escort Memory Systems warrants that all products of its own manufacture conform to Escort Memory Systems specifications and are free from defects in material and workmanship
when used under normal operating conditions and within the service conditions for which
they were furnished. The obligation of Escort Memory Systems hereunder shall expire one
(1) year after delivery, unless otherwise specified, and is limited to repairing, or at its option,
replacing without charge, any such product which in Escort Memory System's sole opinion
proves to be defective within the scope of this Warranty. In the event Escort Memory Systems is not able to repair or replace defective products or components within a reasonable
time after receipt thereof, Buyers shall be credited for their value at the original purchase
price. Escort Memory Systems must be notified in writing of the defect or nonconformity
within the warranty period and the affected product returned to Escort Memory Systems
factory or to an authorized service center within thirty (30) days after discovery of such defect or nonconformity. Shipment shall not be made without prior authorization by Escort
Memory Systems.
This is Escort Memory Systems' sole warranty with respect to the products delivered hereunder. No statement, representation, agreement or understanding oral or written, made by
an agent, distributor, representative, or employee of Escort Memory Systems which is not
contained in this warranty, will be binding upon Escort Memory Systems, unless made in
writing and executed by an authorized Escort Memory Systems employee. Escort Memory
Systems makes no other warranty of any kind whatsoever, expressed or implied, and all implied warranties of merchantability and fitness for a particular use which exceed the
aforestated obligation are hereby disclaimed by Escort Memory Systems and excluded
from this agreement. Under no circumstances shall Escort Memory Systems be liable to
Buyer, in contract or in tort, for any special, indirect, incidental, or consequential damages,
expenses, losses or delay however caused.
Equipment or parts which have been subject to abuse, misuse, accident, alteration, neglect, unauthorized repair or installation are not covered by warranty. Escort Memory Systems shall make the final determination as to the existence and cause of any alleged defect.
No liability is assumed for expendable items such as lamps and fuses. No warranty is made
with respect to custom equipment or products produced to Buyer's specifications except as
specifically stated in writing by Escort Memory Systems in the contract for such custom
equipment.
This warranty is the only warranty made by Escort Memory Systems with respect to the
goods delivered hereunder, and may be modified or amended only by a written instrument
signed by a duly authorized officer of Escort Memory Systems and accepted by the Buyer.
Extended warranties of up to four years are available for purchase for most EMS products.
Contact EMS or your distributor for more information.
This document contains proprietary information which is protected by copyright. All rights are reserved. The information in this manual has been carefully checked and is believed to be accurate; however, no responsibility is assumed for possible inaccuracies or omissions.
Specifications are subject to change without notice.
EMS®, Escort Memory Systems® and the EMS® logo are registered trademarks of Escort
Memory Systems, a Datalogic Group Company. Other brand and product names mentioned are
trademarks or registered trademarks of their respective holders.
Escort Memory Systems
A Datalogic Group Company
170 Technology Circle
Scotts Valley, CA 95066
Telephone (831) 438-7000
FAX (831) 438-5768
www.ems-rfid.com
email: info@ems-rfid.com
ii
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
TABLE OF CONTENTS
GETTING STARTED
1.1
1.2
Dimensions . . . . . . . . . . . . . . . . . . . . . . . . . 4
RF Range and Orientation . . . . . . . . . . . . . . . . . 7
Mounting Guidelines . . . . . . . . . . . . . . . . . . . 12
Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . 13
POWER AND ELECTRICAL INTERFACE
3.1
3.2
3.3
3.4
3.5
3.6
3.7
3.8
3.9
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . 1
Unpacking and Inspection . . . . . . . . . . . . . . . . . 3
MECHANICAL SPECIFICATIONS
2.1
2.2
2.3
14
Connector Panel . . . . . . . . . . . . . . . . . . . . . . 14
Power Connector . . . . . . . . . . . . . . . . . . . . . 15
COM1/COM2 Connector . . . . . . . . . . . . . . . . . 15
Serial Communications Cabling . . . . . . . . . . . . . 16
DeviceNet Connector . . . . . . . . . . . . . . . . . . . 16
Input Connector . . . . . . . . . . . . . . . . . . . . . . 17
Output Connector . . . . . . . . . . . . . . . . . . . . . 17
Digital I/O Wiring . . . . . . . . . . . . . . . . . . . . . 18
Inputs . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Outputs . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Power Requirement . . . . . . . . . . . . . . . . . . . . 23
Power Options. . . . . . . . . . . . . . . . . . . . . . . 23
Power from the DeviceNet Bus . . . . . . . . . . . . . . 24
Power via the external supply connector . . . . . . . . . 24
Power from the DeviceNet bus and from an external power
supply . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
LED Indicators . . . . . . . . . . . . . . . . . . . . . . 27
SERIAL AND BUS COMMUNICATIONS
4.1
4.2
Serial Interfaces . . . . . . . . . . . . .
Digital Board DIP Switch . . . . . . . .
Bus Interfaces . . . . . . . . . . . . . .
DeviceNet Interface Board DIP Switch
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
29
29
30
32
33
iii
5
MENU CONFIGURATION
5.1
5.2
5.3
5.4
5.5
RFID INTERFACE
6.1
6.2
6.3
6.4
iv
How to Enter Menu Configuration
Set-up Operating Parameters . . .
Set COM1 Parameters. . . . . . .
Set COM2 Parameters. . . . . . .
Set Operating Mode . . . . . . . .
Set RF Communication . . . . . .
Restore Factory Defaults . . . . .
Return to Main Menu . . . . . . .
Download New Program . . . . .
Downloading DSP Firmware . . .
Exit to Operating Mode . . . . . .
35
35
36
37
37
37
39
39
40
40
40
41
42
Introduction . . . . . . . . . . . . . . . . . . . . . .
Command Timeout . . . . . . . . . . . . . . . . . .
DeviceNet and Anticollision ABx Limitations . . . .
ABx Error Codes . . . . . . . . . . . . . . . . . . .
Non-Anticollision Error Codes . . . . . . . . . . . .
ABx Standard . . . . . . . . . . . . . . . . . . . . .
ABx Fast . . . . . . . . . . . . . . . . . . . . . . .
Anticollision Status Byte . . . . . . . . . . . . . . .
Anticollision Commands . . . . . . . . . . . . . . .
Family Interrogation . . . . . . . . . . . . . . . . .
Family ID . . . . . . . . . . . . . . . . . . . . . . .
Anticollision Index . . . . . . . . . . . . . . . . . .
ABx Standard Protocol . . . . . . . . . . . . . . . .
ABxS Command 4 (04H): Fill Tag . . . . . . . . . .
ABxS Command 5 (05H): Block Read . . . . . . . .
ABxS Command 6 (06H): Block Write . . . . . . . .
ABxS Command 7 (07H): Read Tag Serial Number .
ABxS Command 8 (08H): Tag Search . . . . . . . .
ABxS Command D (0DH): Continuous Block Read .
ABxS Command 10 (10H): Set Output . . . . . . . .
ABxS Command 11 (11H): Input Status . . . . . . .
ABxS Command 84 (84H): Fill Tag All . . . . . . .
ABxS Command 85 (85H): Block Read All . . . . .
ABxS Command 86 (86H): Block Write All . . . . .
ABxS Command 87 (87H): Read Tag SN All . . . .
42
42
44
45
45
45
46
47
48
48
48
49
51
51
53
55
57
58
59
62
64
66
68
70
72
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
6.5
6.6
ABxS Command 88 (88H): Tag Search All . . . . . . . 74
ABxS Command 89 (89H): EAS Set/Reset All. . . . . . 75
ABxS Command 8A (8AH): EAS Start/Stop . . . . . . . 76
ABxS Command 8D (8DH): Continuous Read All . . . . 78
ABxS Command 8E (8EH): Memory Lock All. . . . . . 80
ABxS Command 94 (94H): SN Fill . . . . . . . . . . . . 82
ABxS Command 95 (95H): SN Block Read . . . . . . 84
ABxS Command 96 (96H): SN Block Write . . . . . . . 86
ABxS Command 97 (97H): SN Block Read All . . . . . 88
ABx Fast Protocol . . . . . . . . . . . . . . . . . . . . . 90
ABx Command Packet Structure: . . . . . . . . . . . . . 90
Command/Response Size . . . . . . . . . . . . . . . . . 91
Checksum . . . . . . . . . . . . . . . . . . . . . . . . . 92
ABxF Command 4 (04H): Fill Tag . . . . . . . . . . . . 93
ABxF Command 5 (05H): Block Read . . . . . . . . . . 95
ABxF Command 6 (06H): Block Write . . . . . . . . . . 97
ABxF Command 7 (07H): Read Tag Serial Number . . . 99
ABxF Command 8 (08H): Tag Search . . . . . . . . . 101
ABxF Command D (0DH): Continuous Block Read . . 102
ABxF Command 10 (10H): Set Output . . . . . . . . . 105
ABxF Command 11 (11H): Input Status . . . . . . . . 107
ABxF Command 84 (84H): Fill All . . . . . . . . . . . 109
ABxF Command 85 (85H): Block Read All. . . . . . . 111
ABxF Command 86 (86H): Block Write All . . . . . . 113
ABxF Command 87 (87H): Read Tag SN All . . . . . . 115
ABxF Command 88 (88H): Tag Search All . . . . . . . 117
ABxF Command 89 (89H): EAS Set/Reset All . . . . . 119
ABxF Command 8A (8AH): EAS Start/Stop . . . . . . 121
ABxF Command 8D (8DH): Continuous Read All . . . 124
ABxF Command 8E (8EH): Memory Lock All . . . . . 127
ABxF Command 94 (94H): SN Fill . . . . . . . . . . . 130
ABxF Command 95 (95H): SN Block Read . . . . . . 132
ABxF Command 96 (96H): SN Block Write . . . . . . 134
ABxF Command 97 (97H): SN Block Read All. . . . . 136
ABx ASCII Protocol . . . . . . . . . . . . . . . . . . . 140
Command Packet Structure: . . . . . . . . . . . . . . . 140
Command/Response Size . . . . . . . . . . . . . . . . 141
Checksum . . . . . . . . . . . . . . . . . . . . . . . . 142
Example ASCII Command . . . . . . . . . . . . . . . 142
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
7
LRP830 DEVICENET INTERFACE
7.1
7.2
7.2.1
7.2.2
7.2.3
7.2.4
7.2.5
7.2.6
7.2.7
7.2.8
7.2.9
vi
Introduction . . . . . . . . . . . . . . . . . . . .
Scan Rates . . . . . . . . . . . . . . . . . . . . .
COM1 LED Indicator . . . . . . . . . . . . . . .
DeviceNet Interface . . . . . . . . . . . . . . . .
Interface Board Monitor Mode . . . . . . . . . .
Enter Interface Board Monitor . . . . . . . . . . .
Downloading Firmware to the Interface Board . .
Downloading with the EC Emulation Program . .
Display Interface Board Configuration Parameters
Interface Board Configuration Editor . . . . . . .
Edit Configuration Command. . . . . . . . . . . .
Configuration Parameter Validation . . . . . . . .
Standard DeviceNet Parameters . . . . . . . . . .
Produce and Consume Sizes . . . . . . . . . . . .
Produce size — ABx Standard, 8 Byte Read . . .
Produce size — ABx Fast, 8 Byte Read . . . . .
Consume size — ABx Standard, 8 Byte Read . .
Consume size — ABx Fast, 8 Byte Read . . . . .
LRP830 Transmit Message Size . . . . . . . . . .
LRP830 Receive Message Size . . . . . . . . . .
Protocol: Poll or Strobe . . . . . . . . . . . . . .
DeviceNet Serial Number . . . . . . . . . . . . .
LRP830 Specific Parameters . . . . . . . . . . .
Device Type . . . . . . . . . . . . . . . . . . . .
ABx separation. . . . . . . . . . . . . . . . . . .
ABx Non-separation . . . . . . . . . . . . . . . .
Polled Commands in ABx Non-separation Mode .
Error Management . . . . . . . . . . . . . . . . .
Trigger Feature . . . . . . . . . . . . . . . . . .
Buf Flush Enable. . . . . . . . . . . . . . . . . .
Buf Flush Delay . . . . . . . . . . . . . . . . . .
Device Type Protocols. . . . . . . . . . . . . . .
Generic Device Type Protocol . . . . . . . . . . .
Header Device Type Protocol . . . . . . . . . . .
144
144
144
145
145
145
145
147
148
148
150
151
153
154
154
154
155
155
156
156
157
157
157
158
158
158
158
159
159
160
161
161
162
162
163
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
A
SPECIFICATIONS
165
MODELS AND ACCESSORIES
166
ASCII CHART
168
LRP830 DEMONSTRATION
170
Before You Begin . . . . . . . . . . . . . . . . . . . . 170
Using DNSW32 or DNSW16 . . . . . . . . . . . . . . 171
DEVICENET PROTOCOL EXAMPLES
Header Device Type Protocol . . . . . .
Header Format . . . . . . . . . . . . . .
Header Device Type Command Protocol
Calculating Message Size . . . . . . . .
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
178
179
179
182
183
vii
NOTICE
This equipment has been tested and found to comply with the limits for a
Class B digital device, pursuant to Part 15 of the FCC Rules. These limits
are designed to provide reasonable protection against harmful interference in
a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications.
However, there is no guarantee that interference will not occur in a particular
installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off
and on, the user is encouraged to try and correct the interference by one or
more of the following measures:
Reorient or relocate the receiving antenna.
Increase the separation between the equipment and the receiver.
Connect the equipment into an outlet on a circuit different
from that to which the receiver is connected.
Consult the dealer or an experienced radio/TV technician for
help.
CAUTION
Changes or modifications not expressly approved by Escort Memory Systems could void the user’s authority to operate the equipment.
viii
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
1 GETTING STARTED
1.1 Introduction
Escort Memory Systems' passive read/write system is a complete family of
field-proven read/write Radio-Frequency Identification products. The system consists of RFID tags, reader/writers, antennas, controllers, bus interfaces, and ancillary equipment. Tags can be attached to a product or its
carrier and act as an electronic identifier, job sheet, portable database, or
manifest. Tags are read and updated via an Escort Memory Systems
Reader/Writer, through any nonconductive material, while moving or standing still.
Escort Memory Systems' LRP-Series long-range passive RFID system is the
latest in our line of high performance, industrial RFID equipment. The passive design of the LRP read/write system uses the RF field from the antenna
to power the tag, eliminating the need for tag batteries. The LRP passive
read/write system is designed to provide cost effective RFID data collection
and control solutions to automation and material handling applications.
The LRP system uses the internationally recognized ISM frequency of 13.56
MHZ to both power the tag, and to establish a radio link to transfer the information.
The LRP830 is specifically designed to work with LRP-Series passive tags,
which provide 48 bytes of reprogrammable memory.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
The LRP830 supports the industrial bus protocol DeviceNet. The LRP830
is encased in a NEMA4 enclosure and features two serial ports, 4 optoisolated inputs, 4 opto-isolated outputs. The LRP830-04 is equipped with
an antenna designed for conveyor mounting and the LRP830-08 features a
rectangular plate antenna.
The COM1 serial port is used to receive commands from the host and to
send the data back. The LRP830 COM1 can be configured either as a
DeviceNet, RS232, or RS422 interface.
COM2 is an RS232 serial port used to download new software releases and
to setup the configuration parameters.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
1.2 Unpacking and Inspection
Unpack the LRP830 and documentation and retain the original shipping
carton and packing material in case any items need to be returned. Inspect
each item carefully for evidence of damage. If any item appears to be damaged, notify your distributor immediately. The LRP830 is delivered with the
following components:
LRP830 (-04, -08) Reader/Writer
LRP830 to Antenna Cable
LRP830 Operator's Manual
The following components are required for configuring a complete system:
LRP-Series Passive Read/Write Tags
User supplied LRP830-to-host cable
DeviceNet host
18 - 30 Vdc, 36 W (1.5 A @ 24 Vdc) power supply
Mating connectors. Please see Appendix B for more
information.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
2 MECHANICAL SPECIFICATIONS
2.1 Dimensions
Figure 1 gives the dimensions for the LRP830. Figures 2-3 show the dimensions of the 04 and 08 remote antennas.
inches
mm
Figure 1 — LRP830 Dimensions
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
inches
mm
Figure 2 — LRP-04 Conveyor-Mount Antenna
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
inches
mm
Figure 3 — LRP-08 Antenna Dimensions
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
2.2 RF Range and Orientation
Figure 4 shows the correct tag orientation as it passes the antenna. Figures
5-7 show the RF fields of the LRP830-04 and LRP830-08 antennas. Tables
1- 3 give the typical and guaranteed ranges of the LRP series tags.
Figure 4 — LRP-08 to Tag Orientation
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Table 1 — Antenna to Tag Ranges, LRP-04 Antenna with Metal*
Tag
Typical Range (Z)
inches/mm
Guaranteed Range
inches/mm
LRP125(HT)
2.50/64
2.00/51
LRP250(HT)
6.75/171
6.00/152
LRP250HT-FLX
6.75/171
6.00/152
LRP-L5555
6.75/171
6.00/152
LRP-L2666
5.75/146
5.00/127
LRP-L4982
8.00/203
7.00/178
LRP-L90140
9.00/229
8.00/203
LRP-P125
2.50/64
2.00/51
LRP-P3858
6.00/152
5.00/127
LRP-P5050
7.00/178
6.00/152
*These ranges are determined with metal near the -04 antenna as it would be in most conveyor
mountings. The actual tuning and testing of the -04 antenna is done with the antenna mounted between two metal rollers on metal rails. The metal rollers are mounted 1/4” from the antenna.
NOTE: Proximity to metal, CRT devices, and other sources of electromagnetic radiation may affect
the range of the antenna.
Figure 5 — Side View of RF Field, LRP-04 Antenna, Metal
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Figure 6 — End View of RF Field, LRP-04 Antenna, Metal
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Table 2 — Antenna to Tag Ranges, LRP-40 Antenna, No Metal*
Tag
Typical Range (Z)
inches/mm
Guaranteed Range
inches/mm
LRP125(HT)
3.00/76
2.25/57
LRP250(HT)
8.50/216
7.50/191
LRP250HT-FLX
8.50/216
7.50/191
LRP-L5555
8.50/216
7.50/191
LRP-L2666
7.00/178
6.00/152
LRP-L4982
10.00/254
9.00/229
LRP-L90140
12.00/305
11.00/279
LRP-P125
3.00/76
2.25/57
LRP-P33858
7.50/190
6.50/165
LRP-P5050
8.50/216
7.50/191
*These ranges calculated with no metal near the antenna.
NOTE: Proximity to metal, CRT devices, and other sources of electromagnetic radiation may affect
the range of the antenna.
Figure 7 — End View of RF Field, LRP-08 Antenna, No Metal
10
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Figure 8 — Side View of RF Field, LRP-08 Antenna, No Metal
Table 3 — Antenna to Tag Ranges, LRP-08 Antenna, No Metal
Tag
Typical Range (Z)
inches/mm
Guaranteed Range
inches/mm
LRP125(HT)
8.00/203
7.00/178
LRP250(HT)
17.00/432
15.00/381
LRP250HT-FLX
17.00/432
15.00/381
LRP-L5555
17.00/432
15.00/381
LRP-L2666
16.00/406
13.00/330
LRP-L4982
20.00/508
18.00/457
LRP-L90140
25.00/635
22.00/559
LRP-P125
8.00/203
7.00/178
LRP-P3858
16.00/406
14.00/355
LRP-5050
17.00/432
15.00/381
*These ranges calculated with no metal near the antenna.
NOTE: Proximity to metal, CRT devices, and other sources of electromagnetic radiation may affect
the range of the antenna.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
11
2.3 Mounting Guidelines
Electromagnetic radiation and metal affect the range of the LRP830. Mount
the LRP830 and antenna to minimize the impact of these factors. The RF
field of the antenna can also cause errors when antennas are spaced too
closely together. Do not position adjacent antennas closer than 2 meters from
each other.
The remote antennas for the LRP830 have a cable length 2 meters. Surrounding the antenna with metal will greatly reduce the reading range of the
antenna. As rule of thumb, keep any metal structure away from the antenna
at least more than the reading range along the axis, and a third of such distance on the side. The mounting holes are accessed through the inside of the
LRP830 Reader/Writer. Refer to Figure 9 for locations and dimensions.
inches
mm
Figure 9 — LRP830 Mounting Holes
12
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Special mounting instructions must be followed to get optimal read/write
performance from the LRP830-08 antenna. Mount the antenna with a minimum 5.90" (150mm) spacing from any metal to the back or sides of the antenna, as shown in Figure 10.
Figure 10 — LRP830-08 Antenna Mounting
Guidelines
Isolate the LRP830 and antenna from electromagnetic
radiation.
Avoid surrounding LRP830 and remote antenna with metal.
Maintain at least 2 meters minimum spacing between adjacent
LRP830s or antennas.
Stay within the guaranteed range for the tag to be used.
Conform with EIA RS232, RS422 and RS485 standards.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
13
3 POWER AND ELECTRICAL INTERFACE
3.1 Connector Panel
Figure 11 shows the LRP connectors, LEDs and connector panel. Unused
connectors can be sealed with optional connector caps. Please see Appendix
B for ordering information.
Figure 11 — Connector Panel
14
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
3.2 Power Connector
Figure 12 shows the power connector pin designations.
Figure 12 — Power Connector
3.3 COM1/COM2 Connector
Figure 13 shows the connector pin designations for the COM port connections.
Figure 13 — COM1/COM2 Connector
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
15
Serial Communications Cabling
Escort Memory Systems recommends that you use Belden cables 3082A
(trunkline) or 3084A (dropline) for RS485/RS422 communications. Use
Belden cable 9941 for RS232 communications. More information on Belden
cables can be found on their web site at www.belden.com.
3.4 DeviceNet Connector
Figure 14 shows the connections for the DeviceNet connector.
Figure 14 — DeviceNet Connector Pinouts
16
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
3.5 Input Connector
Figure 15 shows the Input Connector pin designations.
Figure 15 — Input Connector Pinouts
3.6 Output Connector
Figure 16 shows the Output Connector pin designations.
Figure 16 — Output Connector Pinouts
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
17
3.7 Digital I/O Wiring
Both the Digital Inputs and Digital Outputs are optically isolated circuits
with no common path between any channel terminal and another channel, or
between any channel and the LRP830 power. Because they are independent
and floating, the external wiring controls their use. The inputs can be configured for sensors with a PNP or NPN output. The outputs can be configured
in a Sourcing or Sinking configuration. The examples in Figures 17 through
24 show different connections for common input and output devices.
Inputs
The +IN terminal must be at a higher positive potential than the -IN terminal
for current to be sensed correctly. The voltage range is 4.5 to 30V between
the +IN and the -IN inputs and the maximum current is 25 mA.
Outputs
The output is limited to 30Vdc when off and 500 mA. These are maximum
ratings. A device that operates at 200 mA may destroy the output due to inrush current if that current exceeds 500 mA (e.g. an incandescent light). The
inductive "kick" (back EMF from a collapsing magnetic field) when a relay
is released can impose a voltage higher than 30V and destroy the output
transistor (use a backwards diode to clamp the back EMF).
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Figure 17 — Input from Sourcing Contact
Figure 17 shows the switch on the high side with the low side grounded. As
this is a "Dry" contact (the current is limited to 15 mA) a high quality sealed
switch should be used.
Figure 18 — Input from Sinking Contact
Figure 18 shows a switch connected on the low side with the high side connected to the positive supply. This also requires a high quality sealed contact.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
19
Figure 19 — Input from NPN Sensor
Figure 19 shows an Open Collector NPN output from a photosensor switching to ground. It can be wired as a sinking or low-side contact.
Figure 20 — Input from PNP Sensor
Figure 20 shows an Open Collector PNP output from a photosensor
switches to the positive supply. It can be wired as a sourcing or high-side
contact.
20
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Figure 21 — Sourcing Output "Contact"
Figure 21 shows a relay connected as a current sourcing "Contact." The relay is grounded and the +OUT terminal goes to the positive supply. The diode across the relay coil is essential to protect the output circuit and reduce
noise along the wiring. It should be connected at the relay to minimize the
length of wiring that could radiate noise. A 1N4001 or similar diode may be
used.
Figure 22 — Sinking Output "Contact"
Figure 22 shows a "Contact" sinking current from a relay, the -OUT terminal
is grounded and the relay goes to the positive supply. This configuration
must also have a diode across the relay coil to protect the circuit and reduce
noise.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
21
Figure 23 — Sinking Output LED Driver
In Figure 23, the LED and current limiting resistor are in series between the
positive supply and the +OUT terminal. The -OUT terminal is grounded.
The resistor in series with the LED sets the forward current. 1.2K will provide 20 mA LED current when run from 24 Vdc.
Figure 24 — Output to TTL or CMOS
In Figure 24 the output acts as an Open Collector. This will provide a TTL
or CMOS compatible signal when a 1K to 10K pull-up to +5 Vdc (the logic
supply) is used.
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
3.8 Power Requirement
The LRP830 power supply requirement are:
18 to 30Vdc
31W maximum power consumption.
The maximum current consumption at 24Vdc is 1.3 A.
Power Options
There are three options for powering the LRP830:
Powered from the DeviceNet Bus (default)
This is the default configuration for powering the LRP830. If the
power available over your DeviceNet network is not sufficient to
power the LRP830, use one of the following methods.
Powered via the external power connector
This is how you must power the LRP830 if you are not connecting
the LRP830 to a DeviceNet network.
Powered from an external supply and isolated DeviceNet bus
power (isolated mode)
When the LRP is powered from both sources, the LRP830 will be
opto-isolated from the DeviceNet bus.
The DeviceNet interface board draws 20 mA at 24 Vdc from the
DeviceNet bus when the LRP830 is powered with this method.
Power to the external power connector should conform to the specifications given above.
If you choose to power the LRP830 with an external supply via the power
connector, you must open the LRP830 and changed jumper and cable locations. The following sections describe how to make these changes.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
23
Power from the DeviceNet Bus
By default, the LRP830 is configured to run with power supplied by the network. In this mode, there is no galvanic isolation between the DeviceNet
wires and the LRP830, and there is no need for a separate power supply.
If you choose to power the LRP830 form the DeviceNet bus, you do not
need to make any internal changes to cables and jumpers. Wire power according to the pinouts given for the DeviceNet connector in Figure 14, page
16.
Power via the external supply connector
The LRP830 contains components sensitive to electro-static discharge. Take
proper grounding precautions before opening the LRP830.
To change the LRP830 to run in isolated mode:
1. Open the LPR820 by loosening the four captive screws that secure the cover.
2. Refer to Figure 25 and then move the power cable, labeled assembly 10-3110, from connector J7 to J9.
Figure 25 — Power Cable Connectors J7 andJ9
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
3. The DeviceNet cable, labeled assembly 10-3116, must then exchange places with the power cable, moving from J9 to J7.
4. Referring to Figure 26, locate jumper J1 and move the shunt from
pins 4 and 3 to pins 2 and 1.
5. Close the LRP830 and connect a separate +24V power supply to
the external power connector shown in Figure 12, page 15.
Figure 26 — DeviceNet Board Power Jumper
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
25
Power from the DeviceNet bus and from an external power supply
When the LRP is powered from both sources, the LRP830 will be
opto-isolated from the DeviceNet bus.
The LRP830 contains components sensitive to electro-static discharge. Take
proper grounding precautions before opening the LRP830.
To power the LRP830 from an external supply and the DeviceNet bus:
1. Open the LPR820 by loosening the four captive screws that
secure the cover.
2. Refer to Figure 25 and then move the power cable, labeled assembly 10-3110, from connector J7 to J9.
3. The DeviceNet cable, labeled assembly 10-3111, must then
exchange places with the power cable, moving from J9 to J7.
4. Make sure that the jumper on J1of the DeviceNet Interface Board
connects pins 3 and 4, and then close the LRP830.
5. Connect a separate +24V power supply to the external power
connector shown in Figure 12, page 15.
6. Wire the DeviceNet interface and power according to the pinouts
given for the DeviceNet connector in Figure 14, page 16.
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
3.9 LED Indicators
The LRP830 has 16 LEDs indicating status of the LRP830 Reader/Writer,
interface communications, and I/O status.
Figure 27 — LRP830 Front with LEDs
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
27
Table 4 shows these LEDs and their meaning.
Table 4 — LED Indicators
LED
Color
Indicates
PWR
red
The LRP830 is receiving power
RF
green
RF Data Transfer
ANT
red
Antenna on and tag in field
ERROR
Red
Unsuccessful RF command (.5 sec. flash)
Entering Download Mode via DIP switch 5 (4 flashes)
CONFIG
green
Successful RF command - 1 .5 sec. flash
ERROR + green/red
CONFIG
Entering Operating Mode - 4 alternate flashes
Configuration Mode initiated (CTRL-D) - Both LEDS flash 4 times
Configuration Mode initiated (CTRL-E) - Both LEDS flash 2 times
IN-A
yellow
Input active
IN-B
yellow
Input active
IN-C
yellow
Input active
IN-D
yellow
Input active
COM1
green/red
Incoming data (RX): red
Outgoing data (TX): green
COM2
green/red
Incoming data (RX): red
Outgoing data (TX): green
DeviceNet red
Data transfer (RX/TX): red
OUT-A
Output active
green
OUT-B
green
Output active
OUT-C
green
Output active
OUT-D
green
Output active
Additional LED behavior may be observed during certain commands and
conditions. This behavior will be indicated as appropriate elsewhere in this
manual.
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
4 SERIAL AND BUS COMMUNICATIONS
4.1 Serial Interfaces
The LRP830 has RS232 and RS422 available on the COM1 serial port.
COM2 is configured for RS232 communications and is reserved for downloading programs to the LRP830 and for setting up the configuration
parameters.
Both RS232 and RS422 interfaces are opto-isolated. The RS422 interface
is specially suitable for long cable, noisy environment links.
The specification for the COM1 interface follows:
Baud rate: 1200, 2400, 4800, 9600, 19200, 38400 bps
Data: 7, 8
Parity: Even, Odd, None
Handshake: None, Xon/Xoff
The specification for the COM2 interface follows:
Baud rate: 1200, 2400, 4800, 9600, 19200 bps
Data: 7, 8
Parity: Even, Odd, None
Handshake: None, Xon/Xoff
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
29
Digital Board DIP Switch
The digital board is mounted inside the top of the LRP830 enclosure. The
first 5 switches of the main board sets the COM1 baud rate, electrical interface, and the download options for COM2. Switches 6, 7 and 8 are not used
and should remain OFF. When switch 1 and 2 are both set ON, the baud
rate is set via the Configuration Menu.
Figure 28 — Digital Board with DIP Switch
NOTE:
When you set switch 5 ON to enable download, the default parameters will
first be restored and saved to the non-volatile memory.
The baud rate configuration on the main board only applies to the RS232
and RS422 serial interfaces. When a Bus Interface (DeviceNet) is selected,
the baud rate is set by the Interface Board DIP switches.
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
NOTE:
DIP switch 4 must be in the default ON position for the DeviceNet interface
to function.
Table 5 Main Board DIP Switch Settings
Baud rate
SW 1
Download/
Restore
Defaults
Interface
SW 2
SW 3
SW 4
SW 5
Settings
9600
ON
ON
19200
ON
38400
ON
Set from Configuration Menu
RS232
ON
ON
RS422
ON
DeviceNet
ON
Reserved
Disabled
ON
Enabled Download/ Restore defaults
Switches 6 through 8 are reserved and must be in the OFF position.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
31
4.2 Bus Interfaces
The COM1 serial port, beside the RS232 or RS422 options, can be configured as a DeviceNet interface.
The following bus parameters are set by the DIP switches found on the
Interface Board.
DeviceNet interface
Bus Rate: 125K, 250K, 500Kbps
DeviceNet Node Address (MAC ID)
Figure 29 — DeviceNet Interface Board DIP Switch
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
DeviceNet Interface Board DIP Switch
S1 is an eight position DIP switch. Switches 1 to 6 set the DeviceNet Node
address, switches 6 and 7 are reserved and switch 8 sets the bus rate. Table 6
shows these settings.
Table 6 — DeviceNet DIP Switch Settings
DeviceNet Node Switches
SW1 SW2 SW3 SW4 SW5 SW6
ON
ON
ON ON
ON
ON
ON
ON
ON
ON
ON ON
ON
ON
ON
ON
ON
ON
ON ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON ON
ON
ON
ON
ON
ON
ON
ON ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON ON
Bus Rate
SW7 SW8
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Settings
DeviceNet Node 1
DeviceNet Node 2
DeviceNet Node 3
DeviceNet Node 4
DeviceNet Node 5
DeviceNet Node 6
DeviceNet Node 7
DeviceNet Node 8
DeviceNet Node 9
DeviceNet Node 10
DeviceNet Node 11
DeviceNet Node 12
DeviceNet Node 13
DeviceNet Node 14
DeviceNet Node 15
DeviceNet Node 16
DeviceNet Node 17
DeviceNet Node 18
DeviceNet Node 19
DeviceNet Node 20
DeviceNet Node 21
DeviceNet Node 22
DeviceNet Node 23
DeviceNet Node 24
DeviceNet Node 25
DeviceNet Node 26
DeviceNet Node 27
DeviceNet Node 28
DeviceNet Node 29
DeviceNet Node 30
DeviceNet Node 31
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Table 5 — DeviceNet DIP Switch Settings (cont.)
DeviceNet Node Switches
SW1 SW2 SW3 SW4
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
SW5 SW6
Bus Rate
SW7 SW8
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
ON
34
ON
Settings
DeviceNet Node 32
DeviceNet Node 33
DeviceNet Node 34
DeviceNet Node 35
DeviceNet Node 36
DeviceNet Node 37
DeviceNet Node 38
DeviceNet Node 39
DeviceNet Node 40
DeviceNet Node 41
DeviceNet Node 42
DeviceNet Node 43
DeviceNet Node 44
DeviceNet Node 45
DeviceNet Node 46
DeviceNet Node 47
DeviceNet Node 48
DeviceNet Node 49
DeviceNet Node 50
DeviceNet Node 51
DeviceNet Node 52
DeviceNet Node 53
DeviceNet Node 54
DeviceNet Node 55
DeviceNet Node 56
DeviceNet Node 57
DeviceNet Node 58
DeviceNet Node 59
DeviceNet Node 60
DeviceNet Node 61
DeviceNet Node 62
DeviceNet Node 63
125k
259k
500k
Reserved
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
5 MENU CONFIGURATION
The LRP830 feature a menu-driven program designed to give convenient
access to the serial parameters, restore defaults or change operating modes.
5.1 How to Enter Menu Configuration
Begin by connecting the COM2 port to your PC host (see table below) and
running EC that is available on the diskette or from Escort Memory Systems’ Web site at www.ems-rfid.com.
LRP830
Standard PC Serial Port
COM2 Pin Number
Signal Name
DB9 Pin Number
Signal Name
TX
RX
RX
TX
GND
GND
Set the serial parameters to the LRP830 default settings or the last known
state of COM2.
The default settings for COM2 are as follows:
Baud
9600
Parity
None
Data bits
Stop bits
Flow control
None
If you can not establish communications with COM2, do the following to
restore the default values.
1. Place DIP switch five in the ON position and cycle power to
the LRP830 or press the reset switch. This will load the default
values.
2. Place DIP switch 5 in the OFF position and cycle power once
more.
Please refer to Chapter 4, Serial and Bus Communications for more information on the serial interface.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
35
To enter the Main Board configuration menu, cycle power or press the reset
switch, and then press CTRL-D within the first seven seconds of the initialization. The LRP830 will enter the Configuration Menu. As the LRP830
starts the Configuration program, both the RF and CONFIG LEDs will
flash. The Main Board Configuration menu will display with the current
software version number together with the DSP firmware version.
******************************************************
LRP830 Standard Program
Software V1.7C, June 2000
DSP Firmware V1.7B, August 2000
*******************************************************
[1] Set-up Operating Parameters
[2] Download New Program
[3] Download DSP Firmware
[4] Exit to Operating Mode
Enter Selection:
5.2 Set-up Operating Parameters
To change the operating parameters of the LRP830, enter 1 at the initial
menu. The following menu will be displayed, listing the current settings:
The exact appearance of the menu display will depend on the settings you
have made, and will be updated when you save your changes.
Serial Port COM1: RS232, 9600, N, 8, 1, No handshake (DIP switches)
Serial Port COM2: RS232, 9600, N, 8, 1, No handshake
Operating Mode: ABx Standard
RF Communication: Fast Mode
[1] Set COM1 Parameters
[2] Set COM2 Parameters
[3] Set Operating Mode
[4] Set RF Communications
[5] Restore Factory Defaults
[6] Return to Main Menu
Enter Selection:
Enter the number of the sub-menu you wish to enter. When you have made
your selection you will be prompted to save your changes to the non-volatile
EEPROM. For the new settings to take effect, you must save your changes
to the EEPROM and reset the LRP830. If you do not save changes to the
EEPROM, the new settings will be effective only until the LRP830 is reset.
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
The following sub-menus are presented here in their entirety. Actually the
menus will presented one option at time, advancing as you enter selections.
Some options shown are dependent on earlier selections.
Set COM1 Parameters
Selecting 1 from the above menu will present the following display for the
COM1 parameters. These settings are valid only if you are not using the
DeviceNet Interfaces (e.g. DIP switch 4 is in the OFF position). Enter the
appropriate number at each prompt. The default values are indicated by an
asterisk (*).
*** Set COM1 Parameters ***
Baud Rate? [0] 1200 [1] 2400 [2] 4800 [3] 9600* [4] 19200 [5] 38400
Data size? [0] 7 bit [1] 8 bit*
Parity? [0] None* [1] Even [2] Odd
Handshake? [0] None* [1] Xon/Xoff
Save Changes to EEPROM? [0] No [1] Yes
Set COM2 Parameters
Selecting 2 from the above menu will bring to the following display for the
COM2 parameters. Enter the appropriate number at each prompt. The
default values are indicated by an asterisk.
*** Set COM2 Parameters ***
Baud Rate? [0] 1200 [1] 2400 [2] 4800 [3] 9600* [4] 19200
Data size? [0] 7 bit [1] 8 bit*
Parity? [0] None* [1] Even [2] Odd
Handshake? [0] None* [1] Xon/Xoff
Save Changes to EEPROM? [0] No [1] Yes
Set Operating Mode
The Set Operating Mode menu allows you to choose the command protocol
the LRP830 will use or configure it to automatically enter Continuous Read
Mode upon start-up.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
37
*** Set Operating Mode ***
Command Protocol? [0] ABx Standard* [1] ABx Fast [2] ABx ASCII
Checksum? [0] Disabled* [1] Enabled
Power up in Continuous Read Mode? [0] NO [1] Single Tag [2] Multiple Tag
Start Address (0 to 47)
Length (1 to 48)
Delay Between Duplicate Decodes (0 to 60)
Raw Read Response? [0] NO [1] CR terminate [2] CR/LF terminate
Save Changes to EEPROM? [0] No [1] Yes
Command Protocol?
The LRP830 offers three modes for the transfer of data and commands. ABx
Standard (ABxS) uses only the LSB for tag data while ABx Fast (ABxF)
will use both the MSB and the LSB for the passing of data. ABx ASCII
(ABxA) mode permits RFID operations using seven bit data packets in the
form of printable ASCII characters.
Checksum?
ABx Fast and ABx ASCII also permits you to include a checksum in the
command. To use a checksum value with the ABx commands, you must
enable the checksum option. It is recommended that you enable the
checksum option.
Power up in Continuous Read Mode?
You also have the option of setting the LRP830 to start-up in Continuous
Read Mode. When you have configured the LRP830 to function in this
manner, you do not issue commands to the LRP830. It will, upon start-up,
enter directly into a Continuous Read Mode. Since this bypasses the normal
command parameters, you must specify the Continuous Read Mode
parameters.
The LRP830 will respond to other commands and resume Continuous Read
Mode when completed.
This option will not function over a DeviceNet bus.
If you are using your LRP830 in this mode, you must choose if you want the
LRP830 to read a single tag or read multiple tags within the field.
To exit Continuous Read Mode you must either re-enter the configuration
menu and select NO from the Power up in Continuous Read Mode option,
or issue a Continuous Read command from the host with a read length of 0
as described in Chapter 6, RFID Interface.
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Start Address (0-47)
Enter the tag address where you want the read to begin.
Length (1-48)
Enter the length of the read you wish the LRP830 to perform. Make certain
that the length value does not exceed the number of possible addresses following the starting tag address. Entering a read length of 0 will disable Continuous Read Mode.
Delay Between Identical Decodes (0-60)
The Delay Between Identical Decodes parameters can have a value of 0 to
60 seconds. When the Delay Between Identical Decodes is set to 0, the
LRP830 will continuously read AND transmit tag data to the host. This can
flood the buffers and cause communication errors and data loss.
Raw Read Response?
If you have selected ABx Fast or ABx ASCII, you have the option of stripping the command protocol from the data and adding a terminator to separate the data packets. You can choose a CR (0DH) or CR/LF (0DH, 0AH) to
terminate the data.
Set RF Communication
The LRP830 should be configured with the default (0) Fast Mode.
*** Set RF Communication ***
RF Communication? [0] Fast Mode* [1] Standard Mode 0
Save Changes to EEPROM? [0] No [1] Yes
Restore Factory Defaults
It is often helpful during troubleshooting to restore the LRP830 to known
default values. To do so, select 1from this menu.
*** Restore Factory Defaults ***
Restore Factory Default? [0] No [1] Yes
The restored defaults will be saved to the EEPROM. The communication
defaults can also be restored by placing the main board DIP switch number 5
in the ON position and then restarting the LRP830. After you have saved
any changes, you must re-initialize the LRP830 with switch 5 in the OFF
position.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
39
Return to Main Menu
When you have completed your configuration, entering 5 will return you to
the initial menu. Unsaved changes will be effective until the LRP830 is reset. Saved changes will be loaded automatically the next time the LRP830 is
reset.
5.3 Download New Program
Before attempting to download new firmware to the LRP830 main board,
read the instructions provided in a readme.txt file on the update diskette.
When you select 2 from the Main Menu, the LRP830 will display information on the current program and prompt you to begin the download.
*** Download New Program***
Program Size
:21824 Bytes
Program Checksum
:5AE0H (OK)
Free Program Memory
:39600 Bytes
Flash Write Counter
:2 times
Press a key to start Downloading
After you have pressed a key, the LRP830 will display:
Send the Intel Hex file. Downloading now.
Send the new program file via your terminal emulation program in ASCII
text or Hexadecimal format. Wait 10 seconds after the download is complete
before resetting the LRP830.
IMPORTANT:
It is not necessary to download firmware into the unit unless instructed to do
so by Escort Memory Systems technical support personnel.
5.4 Downloading DSP Firmware
Before attempting to download new firmware to the LRP830 main board,
read the instructions provided in a readme.txt file on the update diskette.
When upgrading software in the controller the number and meaning of the
configuration parameters may not match between the old and new software.
The old settings may not be interpreted properly with the new software. Be-
40
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
fore downloading another version of software, display and record the current
configuration settings. Then download the new software version. Set switch
5 (on the main board) on and apply power to initialize the configuration parameters to their default states. When the LEDs stop flashing, turn Switch 5
to Off and press the reset switch. Enter the Configuration Menu and re-enter
any non-default configuration parameters.
When you select 3 from the Main Menu, the LRP830 will prompt you to
begin the download.
*** Download DSP Firmware***
Press a key to start Downloading
After you have pressed a key, the LRP830 will display:
Send the Intel Hex file. Downloading now.
Send the new firmware via your terminal emulation program in ASCII text
or Hexadecimal format. The firmware will be automatically transferred to
the DSP Flash Memory. Wait 10 seconds after the download is complete
before resetting the LRP830.
Record: 750
Download OK
File Transfer to DSP
Blocco 24/24
DSP Flash Programming...
New Firmware Transferred to DSP
WARNING:
Do not download INTERFACE BOARD firmware to the main board.
IMPORTANT:
It is not necessary to download firmware into the unit unless instructed to do
so by Escort Memory Systems technical support personnel.
5.5 Exit to Operating Mode
This option is available if you wish to use temporary, unsaved, configuration
parameters. The unsaved options you have selected will be used until the
LRP830 is reset and the saved parameters are restored.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
41
6 RFID INTERFACE
6.1 Introduction
The LRP830 offer three possible command protocols: ABx Standard, ABx
Fast and ABx ASCII. The ABx Standard format is word-based and is compatible with most existing RFID systems by Escort Memory Systems. The
ABx Fast protocol is a byte-based packet structure that permits command
execution with fewer total bytes transferred. The ABx ASCII protocol is also
a byte-based format that permits the execution of RFID commands using a
seven-bit ASCII character set.
The ABx Fast protocol is the most efficient and therefore recommended by
Escort Memory Systems. Table 7 lists the ABx commands available for the
LRP830.
The LRP830 command set is made of two subsets: the ‘Non-Anticollision’
commands and the ‘Anticollision’ commands. The Anticollision commands
allow you to manage the multiple-tags-in-field capability of the LRP system.
Command Timeout
Most commands have a timeout value that is used to limit the time the
LRP830 will attempt to complete the specified operation. This value is given
in 1 ms increments with a maximum value of 65,534 ms. A timeout value of
0 will generate a syntax error.
Between 500ms and 1000ms is recommended for a timeout value for single
tag commands. Shorter timeouts may result in diminished range. A 30ms
timeout value is the shortest allowable timeout and should only be used for
short range, single tag command applications. Multiple tag commands will
require longer timeout values. For time critical applications the timeout
value should be tested to obtain the maximum performance value. A longer
timeout value does not mean that the command will take any longer to execute if the tag being addressed is in the field, it only represents the period of
time (in milliseconds) the unit will attempt to execute the command. If the
tag is present, the response time to execute the command will be the same
whether the timeout is 100ms or 10,000ms.
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
NOTE:
The delay between the characters of the command packet the LRP830 cannot be longer than 200 ms.
Table 7 - ABx Command Set Listing
Non-Anticollision Commands
04 Hex
Fill Tag
05 Hex
Block Read
06 Hex
Block Write
07 Hex
Read Tag Serial Number
08 Hex
Tag Search
0D Hex
Continuous Block Read*
10 Hex
Set Output
11 Hex
Input Status
Anticollision Commands
84 Hex
Fill Tag All*
85 Hex
Block Read All*
86 Hex
Block Write All*
87 Hex
Read Tag Serial All*
88 Hex
Tag Search All*
89 Hex
EAS Set/Reset
8A Hex
EAS Start/Stop
8D Hex
Continuous Read All*
8E Hex
Memory Lock
94 Hex
SN Fill
95 Hex
SN Block Read
96 Hex
SN Block Write
97 Hex
SN Block Read All*
*These commands can not be used with DeviceNet.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
43
DeviceNet and Anticollision ABx Limitations
The LRP830 does not support the following “All” commands in multiple
tag-in-field mode (i.e. Anticollision Index is not 0) over a DeviceNet
interface:
Command Number
Command
84H
Fill Tag All
85H
Block Read All
86H
Block Write All
87H
Read Tag SN All
88H
Tag Search All
8DH
Continuous Read All
97H
SN Block Read All
The entire command set is available for point-to-point serial communications.
44
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
6.2 ABx Error Codes
Non-Anticollision Error Codes
The LRP830 will return an error if it encounters a fault during operation.
Table 7 lists the possible error codes in Hexadecimal format.
Table 7 — Non-Anticollision Error Codes
Error Code
04H
05H
06H
08H
21H
Description
Fill Operation has failed
Block Read has failed
Block Write has failed
Search Tag Operation failed
Input Command does not match pre-defined format (syntax error)
Additionally there are internal DSP errors, F1H through F5H, for use by
Escort Memory Systems technical support.
ABx Standard
ABxS error codes are returned in the LSB of the second register passed to
the PLC. The format of the error response is shown below.
MSB
LSB
Remarks
AAH
FFH
Command Error
00H
XXH
Error Code
FFH
FFH
Message Terminator
A Block Write fail error message would appear as: AAFF 0006 FFFFH.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
45
ABx Fast
The format of the error response is shown below.
Field
Bytes Contents
Header

02H
Response Size
00H
02H
02H
Error Flag
FFH
Error Code
XXH
Checksum
XXH
Terminators
03H
A Block Write fail error message would appear as: 0202 0002 FF06 F803H.
ABx ASCII
The format of the error response is shown below.
Field
# of ASCII
characters
Contents
Header

02H
Response Size
Packet length in bytes excluding the header, response size,
checksum and terminator bytes
Error Flag
FFH
02H
Error Code
XXH - see Table 7 for details
Checksum
XXH - optional checksum
Terminators
03H
In ABx ASCII format the response size is the number of hex values and not
the number of ASCII characters used to represent the hex value.
A Block Write fail error message would appear as an ASCII character
string: 0002FF06F8.
In hexadecimal the commands appears as:
02H 02H 30H 30H 30H 32H 46H 46H 30H 36H 46H 38H 03H
46
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Anticollision Status Byte
When the anticollision commands encounter a fault condition they indicate
the set a bit in a STATUS byte returned in the response. The format of the
response is otherwise the same as a successful response.
The STATUS byte is defined as follows:
Antenna
Failure
R/W Error Collisions
Internal
Error
Timeout
Verify
Error
Reserved Reserved
Some of the conditions are the same as found in the non-anticollision commands, other are new and relate only to the anticollision.
If any of the flag bits of the returned Status are set, then that condition
occurred during the command execution. Multiple conditions can occur in
the same command.
Antenna
Failure
R/W error
Collision
There is an error at the antenna
Error during the tag memory access
Collisions detected: more than one tag in the field answered to
the LRP830 at the same time, meaning a higher Anticollision
Index probably needs to be set
Internal Error Internal error in low-level firmware
(contact Escort Memory Systems technical assistance)
Timeout
Timeout expired
Verify Error Set when re-read verification fails
Syntax Errors
Syntax errors (error code 21H) will be returned in the same format as
described for the non-anticollision commands.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
47
6.3 Anticollision Commands
Family Interrogation
The anticollision commands always have a Family ID and an Anticollision
Index as parameters. These parameters manage the read/writes when multiple tags are in the same reading field. The Family ID and Anticollision Index
can be used separately or together. If the Family ID is zero, that feature is
disabled, if the Anticollision Index is zero, this feature (and multiple
tag-in-field) is disabled as well.
If both the features are disabled, the commands operate exactly the same as
the Non-Anticollision commands.
Family ID
The Family ID is a 1 byte field in the LRP tag memory at address 0. When
the Family ID parameter is set to zero, the command is broadcast to all the
tags in the field. On the other hand, if it is not equal to zero, only the tags
with the specified Family ID in byte 1will respond to the LRP830.
This feature can help in implementing a multi-level organization of the tags,
by permitting the selective reading of tags by Family ID. This gives faster
access to the tags than by using Anticollision Index alone. As previously
noted, Family ID and the Anticollision Index can be used together for
increased efficiency.
When using the Family ID feature, the first byte of tag memory is reserved,
and thus only 47 bytes are allowed to be used. When the feature is disabled,
48 bytes are available for user data.
For this reason, in the read and write commands, once the parameter Family
ID is not equal to zero, the addresses can go from 1 to 47, and the size from
0 to 47. However, when the Family Code is zero, the addresses can start
from 0, and the size can be up to 48.
In order to initialize a tag with a chosen Family ID, byte 0 in the tag must be
set to that value by means of a Block Write or a Block Write All command.
48
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Anticollision Index
The Anticollision Index controls the tag reading algorithm to achieve the
fastest reading speed for the number of tags expected in the reading field at
any given moment. It also can disable the multiple tag-in-field feature when
set to 0.
The Anticollision Index should be set in relation to the maximum number of
tags possibly present in the reading field at one time. Setting the
Anticollision Index higher increases the number of tags that will be expected
to be read in the field. Lowering the Index speeds up the tag read operation.
Selecting the Anticollision Index is therefore a tradeoff choice between the
number of tags in the reading field, and the time required to read/write to
them. Regardless of the index setting, ALL tags present will be read. The index simply makes the process more efficient.
None of the Anticollision Index values will absolutely limit the number
of tags that can be read by the LRP830. The following table can assist you
in setting the Index value, but tests should be done to find the best value.
The allowed values are from 0 to 7.
Anticollision Index
(*) anticollision disabled
Max number of tags
1 (*)
2-4
4-8
8-16
16-32
32-64
64-128
>128
Some commands return or have as a parameter, the Serial Number (SN).
The tag serial number is a unique read-only, 64 bit (8 bytes) code in the tag
memory. SN commands can be used to selectively write to a specific tag,
identified by the SN. A target tag can be identified with a previous SN read
command.
Note that the anticollision commands, except SN Block Write, SN Fill and
Tag Search All, will return a response packet only after the timeout is expired. If the command has the Anticollision Index set to 0, then a response
will be returned after the first successful operation.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
49
The Anticollision Commands return a successful response whenever the operation has successfully been completed on at least 1 tag. They will return an
Error Response when no tag, as permitted by the Family ID and
Anticollision Index, can be found in the antenna field.
Note also that all the start addresses, byte lengths and packet sizes are expressed in 2 byte words, in order to be compatible with the HMS commands
and to allow future developments.
50
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
6.4
6.3 ABx Standard Protocol
The ABx standard is a binary protocol, word (2-byte) oriented, so the syntax
table reports the Most Significant Byte (MSB) and the Least Significant
Byte (LSB). In the serial transmission, the MSB is transmitted first.
ABxS Command 4 (04H): Fill Tag
DESCRIPTION
Fill an RFID tag with a one byte value over multiple contiguous addresses.
DISCUSSION
This command is commonly used to clear an RFID tag's memory. It writes a
one byte value repetitively across a specified range of tag addresses.
The fill function requires one data value byte, a starting address, and a fill
length. It will then proceed to fill the tag with the data value byte, starting at
the specified start address for the specified number of consecutive bytes.
When Fill Length is set to 0, the LRP830 will write fill data from the start
address to the end of the tag's memory. The timeout value is given in 1 msec
increments and can have a value of 1EH to FFFEH (65,534 ms). When the
timeout is set to 0, the LRP830 will return a syntax error.
Field
Remarks
Command
Command number in hex preceded by AAH
Start Address
The tag address where the fill will start
Fill Length
The number of tag addresses to be filled in bytes
Timeout
Timeout value given in 1 ms units (1EH - FFFEH)
Data Value Byte
The byte to be used as fill
Message Terminator
FFFFH
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
51
EXAMPLE
Writes 'A' (41H) to the tag starting at address 0005H for the following next
consecutive 10 bytes. A timeout of 2 seconds (07D0H = 2000 x 1 msec
increments) is set for the completion of the configuration.
Command from Host
Response from LRP830
MSB
AAH
00H
00H
LSB
04H
05H
0AH
MSB
AAH
FFH
07H
00H
FFH
D0H
41H
FFH
52
Remarks
Perform Command 4
Start Address = 0005H
Fill Length= 10 bytes
(0064H)
Timeout value
Data Value Byte = 41H
Message Terminator
LSB
04H
FFH
Remarks
Command echo
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxS Command 5 (05H): Block Read
DESCRIPTION
Read a block of data from an RFID tag.
DISCUSSION
This command is used to read segments of data from contiguous areas of tag
memory. It is capable of handling up to 48 bytes of data transferred to the
host with one command. The timeout value is given in 1 msec increments
and can have a value of 1EH to FFFEH (65,534 ms). When the timeout is
set to 0, the LRP830 will return a syntax error.
The Block Read command consists of a start address and length, followed
by the message terminator, FFFFH, as shown below. If the read range exceeds the last tag address, the LRP830 will return error message 21H, invalid format.
The data read from the tag is returned in the LSB of the register, and the
MSB is always 00H.
Field
Remarks
Command
Command number in hex preceded by AAH
Start Address
The tag address where the read will start
Read Length
The number of tag addresses to be read
Timeout
Timeout value given in 1 ms units (1EH - FFFEH)
Message Terminator
FFFFH
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
53
EXAMPLE:
Reads 8 bytes of data from the tag starting at address 0001H. A timeout of 2
seconds (07D0H = 2000 x 1 msec increments) is set for the completion of
the Block Read.
Command from Host
Response from LRP830
MSB
AAH
00H
00H
LSB
05H
01H
08H
MSB
LSB
AAH
05H
Command echo
00H
52H
Read Data 1 = 52H
00H
46H
Read Data 2 = 46H
07H
FFH
D0H
FFH
00H
49H
Read Data 3 = 49H
00H
44H
Read Data 4 = 44H
00H
20H
Read Data 5 = 20H
00H
54H
Read Data 6 = 54H
00H
61H
Read Data 7 = 61H
00H
67H
Read Data 8 = 67H
FFH
FFH
Message Terminator
54
Remarks
Perform command 5
Start Address = 0001H
Read Block Length = 8 bytes
(0008H)
Timeout Value
Message Terminator
Remarks
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxS Command 6 (06H): Block Write
DESCRIPTION
Write a block of data to an RFID tag.
DISCUSSION
This command is used to write segments of data to contiguous areas of tag
memory. It is capable of transferring up to 48 bytes of data transferred from
the Host with one command. The timeout value is given in 1 msec increments and can have a value of 1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will return a syntax error.
The Block Write command consists of a start address followed by the data
stream to be written to the RFID tag. If the write range exceeds the last tag
address, the LRP830 will return error message 21H, invalid format. The
LRP830 will also return an error if the write length is 0.
The data to be written to the tag is contained in the LSB of the register, and
the MSB is always 00H.
Field
Remarks
Command
Command number in hex preceded by AAH
Start Address
The tag address where the write will start
Write Length
The number of tag addresses to be written to in bytes
Timeout
Timeout value given in 1 ms units (1EH - FFFEH)
Write Data
The data to be written
Message Terminator
FFFFH
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
55
EXAMPLE:
Writes 4 bytes of data to the tag starting at address 0020H. A timeout of 2
seconds (07D0H = 2000 x 1 msec increments) is set for the completion of
the Block Write.
Command from Host
Response from LRP830
MSB
Remarks
MSB
LSB
LSB
Remarks
AAH
06H
Perform Command 6
AAH
06H
Command echo
00H
20H
Start Address = 0020H
FFH
FFH
Message Terminator
00H
04H
Write Length = 4 bytes
07H
D0H
Timeout Value
00H
52H
Write Data 1 = 52H
00H
46H
Write Data 2 = 46H
00H
49H
Write Data 3 = 49H
00H
44H
Write Data 4 = 44H
FFH
FFH
Message Terminator
56
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxS Command 7 (07H): Read Tag Serial Number
DESCRIPTION
Retrieve the eight-byte tag serial number.
DISCUSSION
Each LRP tag has an unique (264 possible numbers) serial number. This
number can not be changed and is not part of the 48 available data bytes. Tag
ID will be return in the LSB only, with the MSB as 00H.
Field
Remarks
Command
Command number in hex preceded by AAH
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Message Terminator
FFFFH
EXAMPLE:
This example will wait until a tag is in range and then reads the 8-byte serial
number. In this example the SN is 1E6E3DC200000000H in hexadecimal.
Command from Host
Response from LRP830
MSB
LSB
Remarks
MSB
AAH
07H
Perform Command 7
AAH
07H
Command Echo
07H
D0H
Timeout
00H
1EH
First SN byte
FFH
FFH
Message Terminator
00H
6EH
Second SN byte
00H
3DH
Third SN byte
00H
C2H
Fourth SN byte
00H
00H
Fifth SN byte
00H
00H
Sixth SN byte
00H
00H
Seventh SN byte
00H
00H
Eighth SN byte
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
LSB
Remarks
57
ABxS Command 8 (08H): Tag Search
DESCRIPTION
Check to see if there is an RFID tag in the LRP830 field.
DISCUSSION
This command will activate LRP830 to "look" for a tag in the RF field. If the
LRP830 finds a tag it will return a command echo to the host. The timeout
value is given in 1 msec increments and can have a value of 1EH to FFFEH
(65,534 ms). When the timeout is set to 0, the LRP830 will return a syntax
error. If no tag is present, it will return an error message. See Section 6.2 for
more information on error codes.
Field
Remarks
Command
Command number in hex preceded by AAH
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Message Terminator
FFFFH
EXAMPLE
Checks for an RFID tag in the RF field. A timeout of 2 seconds (07D0H =
2000 x 1 msec increments) is set for the completion of the Tag Search.
Command from Host
Response from LRP830
MSB
Remarks
MSB
LSB
LSB
Remarks
AAH
08H
Perform Command 8
AAH
08H
Command echo
07H
D0H
Timeout Value
FFH
FFH
Message Terminator
FFH
FFH
Message Terminator
58
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxS Command D (0DH): Continuous Block Read
DESCRIPTION
When in Continuous Block Read mode, the LRP830 sends block reads continuously to any tag in range of the antenna. When a tag enters the RF field,
it is read and the data passed to the host computer. The LRP830 continues to
read the tag but will not send the same data to the host until the tag has been
outside the RF field for a specified time period. This Delay Between Identical Decodes feature prevents redundant data transmissions when the
LRP830 is in Continuous Block Read mode.
DISCUSSION
The initiate/cancel Continuous Block Read command contains three parameters: read length, start address, and delay between identical decodes. The
read length parameter switches the mode. Any valid, non-zero length (1-48)
will set the LRP830 into Continuous Block Read mode. A read length value
of 00H will turn Continuous Block Mode off.
The Delay Between Identical Decodes value can have a value of 0 to 60
seconds. When the Delay Between Identical Decodes is set to 0, the LRP830
will continuously read AND transmit tag data to the host. This can flood the
buffers and cause communication errors and data loss.
If the LRP830 receives other commands from the host, it will execute them
and then resume Continuous Block Read mode. To exit Continuous Block
Read mode, issue the command with a read length of 0.
In Continuous Block Read mode, the LEDs will display as follows:
LED
Behavior
ANT LED
ON
Description
Assumes the Antenna is powered and functioning
CONFIG LED BLINK
Tag entered the RF field
RF LED
ON
A tag has been read and is still in the field
RF LED
OFF
A read tag has been out of range for the specified time
NOTE:
This command can not be used over a DeviceNet interface.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
59
The command is formatted as follows.
Field
Remarks
Command
Command number in hex preceded by AAH
Start Address
2 byte value for the start address in the tag
Read Length
2 byte value for the block read length
Delay Between
Identical Decodes
Time the tag must be out of the antenna range before the LRP830 will
transmit data again from that tag. Value is expressed in 1 second units.
Message Terminator
FFFFH
EXAMPLE
This example places the LRP830 in Continuous Block Read mode and reads
8 bytes of data from the tag starting at address 0001H. A delay between
identical reads of 2 seconds (0002H = 2 x 1 second increments) is set.
Command from Host
Response from LRP830
MSB
LSB
Remarks
MSB
LSB
Remarks
AAH
0DH
Perform Command D
AAH
0DH
Command echo
00H
01H
Start address
FFH
FFH
Message Terminator
00H
08H
Read 8 bytes
00H
02H
2 second delay
FFH
FFH
Message Terminator
The LRP830 will first return an acknowledgment of the command followed
by a response containing read data when a tag enters the antenna field.
Response from LRP830
MSB
LSB
AAH
0DH
Command echo
00H
52H
Read data byte 1
00H
46H
Read data byte 2
00H
49H
Read data byte 3
00H
44H
Read data byte 4
00H
41H
Read data byte 5
00H
20H
Read data byte 6
00H
54H
Read data byte 7
00H
61H
Read data byte 8
FFH
FFH
Message Terminator
60
Remarks
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
To exit Continuous Block Read mode, Send the command with the read
length variable set to 0 as shown below. The value of the other variables are
not considered.
Command from Host
Response from LRP830
MSB
Remarks
MSB
LSB
Remarks
LSB
AAH
0DH
Perform Command D
AAH
0DH
Command echo
00H
01H
Start address
FFH
FFH
Message Terminator
00H
00H
Read 0 bytes/end mode
00H
02H
2 second delay
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
61
ABxS Command 10 (10H): Set Output
DESCRIPTION
Set the levels of the output lines and output LEDs "A" through "D."
DISCUSSION
This command uses bit logic to set the levels of the digital output lines. The
four least significant bit toggle the output levels; 1 = ON and 0 = OFF. The
following chart shows the hex values for all output high combinations. To
reset all output, issue the command with 00H in the second word.
MSB
LSB
Remarks
LSB Bit 3 LSB Bit 2 LSB Bit 1 LSB Bit 0
Output D Output C Output B Output A
00H
00H
Reset A, B, C, D
00H
01H
Set Output A - Reset B, C, D
00H
02H
Set Output B - Reset A, C, D
00H
03H
Set Output A, B - Reset C, D
00H
04H
Set Output C - Reset A, B, D
00H
05H
Set Output A, C - Reset B, D
00H
06H
Set Output B, C - Reset A, D
00H
07H
Set Output A, B, C - Reset D
00H
08H
Set Output D - Reset A, B, C
00H
09H
Set Output A, D - Reset B, C
00H
0AH
Set Output B, D - Reset A, C
00H
0BH
Set Output A, B, D - Reset C
00H
0CH
Set Output C, D - Reset A, B
00H
0DH
Set Output A, C, D - Reset B
00H
0EH
Set Output B, C, D - Reset A
00H
0FH
Set Output A, B, C, D
Field
Remarks
Command
Command number in hex preceded by AAH
Output Pattern
Hex value for the bit output settings
Message Terminator
FFFFH
62
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE
The following example sets Output B only and resets A, C, and D.
Command from Host
Response from LRP830
MSB
Remarks
MSB
LSB
Remarks
LSB
AAH
10H
Perform Command 10
AAH
10H
Command echo
00H
02H
Set Output B
FFH
FFH
Message Terminator
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
63
ABxS Command 11 (11H): Input Status
DESCRIPTION
Retrieves the input line levels.
DISCUSSION
This command uses bit logic to monitor the levels of the digital input lines.
The four least significant bit display the output levels; 1 = ON and 0 = OFF.
The following chart shows the hex values for all input conditions that can be
returned in word 2 of the response.
MSB
LSB
Remarks
LSB Bit 3
Input D
LSB Bit 2
Input C
LSB Bit 1
Input B
LSB Bit 0
Input A
00H
00H
Inputs A, B, C, D, OFF
00H
00H
01H
Input A, ON - B, C, D, OFF
02H
Input B, ON - A, C, D, OFF
00H
03H
Input A, B, ON - C, D, OFF
00H
04H
Input C, ON - A, B, D, OFF
00H
05H
Input A, C, ON - B, D, OFF
00H
06H
Input B, C, ON - A, D, OFF
00H
07H
Input A, B, C, ON - D, OFF
00H
08H
Input D, ON - A, B, C, OFF
00H
09H
Input A, D, ON - B, C, OFF
00H
0AH
Input B, D, ON - A, C, OFF
00H
0BH
Input A, B, D, ON - C, OFF
00H
0CH
Input C, D, ON - A, B, OFF
00H
0DH
Input A, C, D, ON - B, OFF
00H
0EH
Input B, C, D, ON - A, OFF
00H
0FH
Input A, B, C, D, ON
Field
Remarks
Command
Command number in hex preceded by AAH
Message Terminator
FFFFH
64
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE
The following example shows only Input B is ON.
Command from Host
Response from LRP830
MSB
Remarks
MSB
LSB
Remarks
11H
Command echo
LSB
AAH
11H
Perform Command 11
AAH
FFH
FFH
Message Terminator
00H
02H
Input B ON
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
65
ABxS Command 84 (84H): Fill Tag All
DESCRIPTION
Fill all RFID tags-in-field or all tags in the same family with a one byte
value over multiple contiguous addresses.
DISCUSSION
This command is commonly used to clear an RFID tag's memory. It writes a
one byte value repetitively across a specified range of tag addresses. All tags
present in the antenna field with the specified Family ID will be affected by
this command.
The fill function requires one data value byte, a starting address, and a fill
length. It will then proceed to fill the tag with the data value byte, starting at
the specified start address for the specified number of consecutive bytes.
The Fill Length must be set to a non-zero value (1-48). The timeout value is
given in 1 msec increments and can have a value of 1EH to FFFEH (65,534
ms). When the Anticollision Index is not zero (multiple tag-in-field enabled), the LRP830 will return a response after the timeout expires. If the
Anticollision Index is 0, a response is returned when a successful operation
is performed on 1 tag or when the timeout has expired. When the timeout is
set to 0, the LRP830 will return a syntax error.
Field
Remarks
Command
Command number in hex preceded by AAH
Family Code
Tag Family ID - 00H = all tags
Anticollision index
Number of tags expected
Start Address
The tag address where the fill will start
Fill Length
The number of tag addresses to be filled (1-48)
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Data Value Byte
The byte to be used as fill
Message Terminator
FFFFH
NOTE:
This command can not be used over a DeviceNet interface.
66
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
A response to a successful command will follow this form.
Field
Remarks
Command Echo
Command number in hex preceded by AAH
Number of Tags filled
Number of tags found in the field and filled
Command Status
One byte Error status
Message Terminator
FFFFH
EXAMPLE
Writes 'A' (41H) to all tags of family 01H, starting at tag address 0005H for
the following next consecutive 40 bytes, with four to eight tags expected in
the field. A timeout of 2 seconds (07D0H = 2000 x 1 msec increments) is
set for the completion of the Fill All Tag. The Anticollision Index is set to 2
so 4 to 8 tags will be expected. Four tags are successfully filled within the
timeout.
Command from Host
Response from LRP830
MSB
LSB
Remarks
MSB
LSB
Remarks
AAH
84H
Perform Command 84
AAH
84H
Command Echo
01H
02H
Tag Family 01/ Index 2
04H
08H
Ntag/Status
00H
05H
Start Address
FFH
FFH
Message Terminator
00H
28H
Fill Length
07H
D0H
Timeout
00H
41H
Fill byte
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
67
ABxS Command 85 (85H): Block Read All
DESCRIPTION
Read a block of data from all RFID tags-in-field or those with the specified
Family ID.
DISCUSSION
This command is used to read segments of data from contiguous areas of tag
memory. It is capable of handling up to 48 bytes of data transferred to the
host with one command. The timeout value is given in 1 msec increments
and can have a value of 1EH to FFFEH (65,534 ms). When the timeout is
set to 0, the LRP830 will return a syntax error 21H.
The Block Read All consists of Tag Family ID and an Anticollision Index,
a start address and length, followed by a timeout value and the message
terminator. If the read length exceeds the last tag address, the LRP830 will
return a syntax error message 21H.
The data read from the tag is returned in the LSB of the register, and the
MSB is always 00H.
A special termination packet (AAH FFH) is sent after the timeout expires.
When the Anticollision Index is not zero (multiple tag-in-field enabled), the
LRP830 will return a response after the timeout expires. If the Anticollision
Index is 0, the command returns after the successful operation on one tag or
when the timeout expires. No termination packet is sent after a successful
operation when the Anticollision Index set to 0.
Field
Remarks
Command
Command number in hex preceded by AAH
Tag Family
Tag Family ID - 00H = all tags
Anticollision index
Number of tags-in-field expected
Start Address
The tag address where the read will start
Read Length
The number of tag addresses to be read
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Message Terminator
FFFFH
NOTE:
This command can not be used over a DeviceNet interface.
68
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE:
Reads 4 bytes of data from the tag starting at address 0001H. A timeout of 2
seconds (07D0H = 2000 x 1 msec increments) is set for the completion of
the Block Read All. The Family ID byte is set to zero so all tags will be read.
The Anticollision Index is set to 2 so 4 to 8 tags will be expected. Three tags
respond with read data.
Command from Host
Response from LRP830
MSB
LSB
Remarks
MSB
LSB
AAH
85H
Perform Command 85
AAH
85H
Command Echo/Tag 1
00H
02H
Tag Family 00/ Index 2
00H
30H
Data byte 1/Tag 1
00H
01H
Start Address
00H
31H
Data byte 2/Tag 1
00H
04H
Read Length
00H
32H
Data byte 3/Tag 1
07H
D0H
Timeout
00H
33H
Data byte 4/Tag 1
FFH
FFH
Message Terminator
FFH
FFH
Terminator/ Tag 1
AAH
85H
Command Echo/Tag 2
00H
40H
Data byte 1/Tag 2
00H
41H
Data byte 2/Tag 2
00H
42H
Data byte 3/Tag 2
00H
43H
Data byte 4/Tag 2
FFH
FFH
Terminator/ Tag 2
AAH
85H
Command Echo/Tag 3
00H
34H
Data byte 1/Tag 3
00H
35H
Data byte 2/Tag 3
00H
36H
Data byte 3/Tag 3
00H
37H
Data byte 4/Tag 3
FFH
FFH
Terminator/ Tag 3
AAH
FFH
Termination Packet
03H
08H
Ntag/Status
FFH
FFH
Terminator Message
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Remarks
69
ABxS Command 86 (86H): Block Write All
DESCRIPTION
Write a block of data to all RFID tags or all tags with the same Family ID.
DISCUSSION
This command is used to write segments of data to contiguous areas of tag
memory. It is capable of transferring up to 48 bytes of data transferred from
the Host with one command. The timeout value is given in 1 msec increments and can have a value of 1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will return a syntax error.
The Block Write consists of a Tag Family ID and an Anticollision Index,
start address followed by the data stream to be written to the RFID tag. If the
write range exceeds the last tag address, the LRP830 will return error message 21H, invalid format.
The data to be written to the tag is contained in the LSB of the register, and
the MSB is always 00H.
The LRP830 returns a response when the timeout expires. If the
Anticollision Index is 0 the command returns a response after the successful
operation on 1 tag, or when the timeout expires.
Field
Remarks
Command
Command number in hex preceded by AAH
Family ID
Tag Family ID - 0 = all tags
Anticollision Index
Number of tags-in-field expected
Start Address
The tag address where the write will start
Write Length
The number of tag addresses to be written to in bytes
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Write Data
The data to be written (1-48 bytes)
Message Terminator
FFFFH
NOTE:
This command can not be used over a DeviceNet interface.
70
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE:
Writes 4 bytes of data, starting at address 0001H. A timeout of 2 seconds
(07D0H = 2000 x 1 msec increments) is set for the completion of the Block
Write. The Family ID byte is set to 2, so all tags with Family ID of 2 will be
written to (four tags in this example). The Anticollision Index is set to 2 so 4
to 8 tags are expected in the field.
Command from Host
Response from LRP830
MSB
Remarks
MSB
LSB
LSB
Remarks
AAH
86H
Perform Command 86
AAH
86H
Command Echo
02H
02H
Tag Family 02/ Index 2
04H
08H
Ntags/Status
00H
01H
Start Address
FFH
FFH
Message Terminator
00H
04H
Write Length
07H
D0H
Timeout
00H
40H
Data byte 1
00H
41H
Data byte 2
00H
42H
Data byte 3
00H
43H
Data byte 4
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
71
ABxS Command 87 (87H): Read Tag SN All
DESCRIPTION
This command retrieves the 8-byte tag serial number from all tags or those
with the specified Family ID number.
DISCUSSION
Each LRP tag has an unique (264 possible numbers) serial number. This
number cannot be changed and is not part of the 48 available data bytes. The
Tag SN is returned in the LSB only, with the MSB as 00H.
The timeout value is given in 1 msec increments and can have a value of
1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will
return a syntax error. A special termination packet (starting with AAH FFH)
is sent when the timeout expires. If the Anticollision Index is 0, a response
is returned after successful operation to 1 tag or after the timeout has expired. No termination packet is sent after a successful operation when the
Anticollision Index set to 0.
Field
Remarks
Command
Command number in hex preceded by AAH
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags-in-field expected
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Message Terminator
FFFFH
NOTE:
This command can not be used over a DeviceNet interface.
72
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE:
This example will read the 8-byte serial number from Tag Family 2. The
Anticollision Index of 2 sets the number of expected tags at 4-8. In this example the SN for the found tag is 1E6E3CD200000000H in hexadecimal.
Multiple tags will return a complete response packet for each tag.
Command from Host
Response from LRP830
MSB
LSB
Remarks
MSB
LSB
AAH
87H
Perform Command 87
AAH
87H
Command Echo
02H
02H
Tag Family 02 / Index 2
00H
1EH
First SN byte
07H
D0H
Timeout
00H
6EH
Second SN byte
FFH
FFH
Message Terminator
00H
3CH
Third SN byte
00H
D2H
Fourth SN byte
00H
00H
Fifth SN byte
00H
00H
Sixth SN byte
00H
00H
Seventh SN byte
00H
00H
Eighth SN byte
FFH
FFH
Message Terminator
AAH
FFH
Termination Packet
01H
08H
Ntags/Status
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Remarks
73
ABxS Command 88 (88H): Tag Search All
DESCRIPTION
Check to see if there is an RFID tag in the LRP830 field.
DISCUSSION
This command will activate LRP830 to "look" for a tag in the RF field. As
soon as the LRP830 finds a tag it will return a command echo to the host.
The timeout value is given in 1 msec increments and can have a value of
1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will
return a syntax error. If no tag is present, it will return an error message. See
Section 6.2 for more information on error codes.
The number of tags returned can be either 1 (tag found) or 0 (timeout expired without having found a tag).
Field
Remarks
Command
Command number in hex preceded by AAH
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags-in-field expected
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Message Terminator
FFFFH
NOTE:
This command can not be used over a DeviceNet interface.
EXAMPLE
Checks for an RFID tag in the RF field. A timeout of 1 seconds (07D0H =
2000 x 1 msec increments) is set for the completion of the Tag Search All.
The Family ID is set for any tag, and the Anticollision Index is set to expect
4-8 tags. One tag is found and the command is successful.
Command from Host
Response from LRP830
MSB
LSB
Remarks
MSB
AAH
88H
Perform Command 88
AAH
88H
Command Echo
01H
01H
Family ID / Index 2
01H
00H
Ntags/Status
07H
D0H
Timeout
FFH
FFH
Message Terminator
FFH
FFH
Message Terminator
74
LSB
Remarks
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxS Command 89 (89H): EAS Set/Reset All
DESCRIPTION
Sets or resets the EAS feature in tag memory for all tags in range, and of the
specified Family, when the command is issued.
DESCRIPTION
The commands contains a 1 byte parameter that enables or disables the EAS
feature in tags that receive the command. When the EAS Set/Reset All command is issued, the LRP830 responds with the number of tags affected
(Ntag). If the LRP830 returns a 0 for Ntag it means that no tags were set or
reset by the command.
When multiple tag-in-field is enabled (Anticollision Index is not 0), the
LRP830 will return a response when the timeout period expires. When multiple tag-in-field is disabled, the LRP830 will return a response when it reads
a tag or the timeout expires.
Field
Remarks
Command
Command number in hex preceded by AAH
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Set/Reset
1 = Set, 0 = Reset EAS
Message Terminator
FFFFH
EXAMPLE
This example assumes that the tags-in-field are not enabled for the EAS
feature. It will enabled the EAS feature for tags with Family ID 09H. The
Anticollision Index is 2, so 4-8 tags are expected in the field. When the command is issued, 5 tags with Family ID 09H are found and enabled for EAS.
Command from Host
Response from LRP830
MSB
LSB
Remarks
MSB
LSB
Remarks
AAH
89H
Perform Command 89
AAH
89H
Command Echo
09H
02H
Family ID/Anticollision Index 2
05H
08H
Ntags/Status
07H
D0H
Timeout
FFH
FFH
Message Terminator
00H
01H
Set EAS
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
75
ABxS Command 8A (8AH): EAS Start/Stop
DESCRIPTION
If are using the EAS feature in your application, the EAS Start/Stop command enters and exits the LRP830 from EAS mode.
DISCUSSION
When EAS mode has been started, the LRP830 will return a response when
one or more EAS-enabled tags have entered the antenna field. It will send a
second response when all EAS-enabled tags have exited the field. The command contains a control byte that toggles EAS: 1 = start, 0 = stop. A Family
ID can be set so that only EAS-enabled tags from the specified Family trigger EAS responses. The Anticollision Index is ignored and should be set to
00H for this command.
The EAS mode also controls the CONFIG, ERROR and RF LEDs. The
following table:
LED(s)
Behavior
Description
CONFIG,
ERROR,
RF LEDs
OFF
No EAS-enabled tag in field
RF LED
ON
EAS-enabled tag entered field. LED will remain ON until all EAS tags
have left the field.
ERROR LED
BLINKS
Last EAS tag left the field.
IMPORTANT:
EAS mode prevents any other commands from being acknowledged or executed until EAS has been stopped.
Field
Remarks
Command
Command number in hex preceded by AAH
Family ID
Tag Family ID - 00H = all tags
Start/Stop
1 = start, 0 = stop
Message Terminator
FFFFH
76
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE
This example starts EAS mode. Three responses follow. The first is a command acknowledgment. The LRP830 sends the second when the first
EAS-enabled tag enters the field, A third response is sent when field is clear
of EAS-enabled tags. Family ID is set to 0 so that any EAS-enabled tag will
trigger responses.
Command from Host
ACT Response from LRP830
MSB
LSB
Remarks
MSB
LSB
Remarks
AAH
89H
Perform Command 89
AAH
89H
Command Echo
00H
00H
Family ID/null byte
FFH
00H
Ntag/Status
00H
01H
Start/Stop
FFH
FFH
Message Terminator
FFH
FFH
Message Terminator
When an EAS-enabled tag enters the antennas’ field, the LRP830 responds
with an EAS tag-in-field response.
Tags-in-Field Response from LRP830
MSB
LSB
Remarks
AAH
89H
Command Echo
01H
00H
Ntag/Status
FFH
FFH
Message Terminator
When all EAS-enabled tags have left the field, the LRP830 will send the following response.
EAS Tags Left Field
Response from LRP830
MSB
LSB
AAH
89H
Remarks
Command Echo
00H
00H
Ntag/Status
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
77
ABxS Command 8D (8DH): Continuous Read All
DESCRIPTION
Starts and stops Continuous Read All mode for multiple tags.
DISCUSSION
Continuous Read All mode is set by the length byte. To start Continuous
Read All mode, send the command with valid, non-zero value for the length
of the read (1-48). Stop the mode by sending the command with a read
length of 0.
While in this mode, any other command can be issued and it will be handled
properly. After processing the new command, the LRP will resume the Continuous Read All mode.
The command has a parameter, tag delay, that can prevent multiple reads of
the same tag. A tag is not read a second time until a specified number of
tags have been read since it was last read. Allowed value are from 0 to 255
(FFH), where 0 means the tag can be re-read anytime. When Continuous
Read All mode is interrupted with other commands, the tag delay count is
stopped during execution of the other commands and then resumed.
The LRP830 will respond with an acknowledge packet followed by data
packets for each tag read.
CONFIG LED blinks after each packet transmission.
Field
Remarks
Command
Command number in hex preceded by AAH
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Start Address
Tag address for the start of the read
Read Length
1-48 = start, 0 = stop
Tag Delay
Number of tags that must be read before the same tag will be read again
(0-225)
Message Terminator
FFFFH
NOTE:
This command can not be used over a DeviceNet interface.
78
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE
Reads 4 bytes of data from the tag starting at address 0001H. The Family ID
byte is set to zero so all tags will be read. The Anticollision Index is set to 2
so 4 to 8 tags will be expected. The Tag Delay is set to 20 (14H). Three tags
respond with read data.
Command from Host
ACK Response from LRP830
MSB
LSB
Remarks
MSB
LSB
AAH
8DH
Perform Command 8D
AAH
8DH
Command Echo
00H
02H
Tag Family 00/ Index 2
FFH
FFH
Message Terminator
00H
01H
Start Address
00H
04H
Read Length
00H
14H
Tag Delay
FFH
FFH
Message Terminator
Remarks
After the LRP830 sends the acknowledgment, it will send the read data from
the 3 tags.
Data response from LRP830
MSB
LSB
AAH
8DH
Remarks
Command Echo/Tag 1
00H
30H
Data byte 1/Tag 1
00H
31H
Data byte 2/Tag 1
00H
32H
Data byte 3/Tag 1
00H
33H
Data byte 4/Tag 1
FFH
FFH
Terminator/ Tag 1
AAH
8DH
Command Echo/Tag 2
00H
40H
Data byte 1/Tag 2
00H
41H
Data byte 2/Tag 2
00H
42H
Data byte 3/Tag 2
00H
43H
Data byte 4/Tag 2
FFH
FFH
Terminator/ Tag 2
AAH
8DH
Command Echo/Tag 3
00H
34H
Data byte 1/Tag 3
00H
35H
Data byte 2/Tag 3
00H
36H
Data byte 3/Tag 3
00H
37H
Data byte 4/Tag 3
FFH
FFH
Terminator/ Tag 3
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
79
ABxS Command 8E (8EH): Memory Lock All
DESCRIPTION
This command “locks” tag addresses in four byte blocks. Once bytes are
locked, they can not be unlocked.
DISCUSSION
The memory can be locked only in 4-byte blocks. The command passes a
two byte word with bits assigned to 4-byte blocks that can be locked. Remaining bits can lock the EAS feature and the lock configuration itself.
When multiple tag-in-field is enabled (Anticollision Index is not 0), the
LRP830 will return a response when the timeout period expires. When multiple tag-in-field is disabled, the LRP830 will return a response when it locks
bytes or the timeout expires.
Attempting to write to locked bytes will return a write error timeout in the
status byte. If you write to addresses that\ contain both locked and
non-locked bytes, the LRP830 will return a write error in the status byte.
The configuration word formatted as shown below.
Byte
Lock LSB
Lock MSB
80
Bit
Description
Tag bytes 0-3
Tag bytes 4-7
Tag bytes 8-11
Tag bytes 12-15
Tag bytes 16-19
Tag bytes 20-23
Tag bytes 24-27
Tag bytes 28-31
Tag bytes 32-35
Tag bytes 36-39
10
Tag bytes 40-43
11
Tag bytes 44-47
12
Lock Configuration
13
Lock EAS feature
14
Reserved
15
Reserved
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
If a bit in the configuration word is set, then the corresponding block in the
tag is locked when the command is issued. If a bit in the configuration word
is cleared (0), then the corresponding block will not change. Once locked, a
block can not be unlocked.
The command is formatted as shown below.
Field
Remarks
Command
Command number in hex preceded by AAH
Family Code
Tag Family ID - 00H = all tags
Anticollision index
Number of tags-in-field expected
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Lock MSB
Bits 8-15 of the configuration word
Lock LSB
Bits 0-7 of the configuration word
Message Terminator
FFFFH
EXAMPLE
This example will lock bytes 0-3 on all tags-in-field with the Family ID of
02H. Two tags are found and locked.
Command from Host
Response from LRP830
MSB
LSB
Remarks
MSB
LSB
Remarks
AAH
8EH
Perform Command 8E
AAH
8EH
Command Echo
02H
01H
Family ID/anticollision Index
02H
08H
Ntag/Status
07H
D0H
2 second timeout
FFH
FFH
Message Terminator
00H
01H
Lock Configuration
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
81
ABxS Command 94 (94H): SN Fill
DESCRIPTION
Fills only the RFID tag specified by serial number with a one byte value
over multiple contiguous addresses.
DISCUSSION
This command is commonly used to clear an RFID tag's memory. It writes a
one byte value repetitively across a specified range of tag addresses. Only
the tag with the specified serial number will be affected by this command.
The LRP830 will return a response after the successful fill operation or
when the timeout expires.
The fill function requires a Family ID and an Anticollision Index, one data
value byte, a starting address, and a fill length. Then the command lists the
serial numbers of the tag to be filled. It fills the specified tag with the data
value byte, starting at the specified start address for the specified number of
consecutive bytes. When Fill Length is set to 0, the LRP830 will write fill
data from the start address to the end of the tags memory.
The timeout value is given in 1 msec increments and can have a value of
1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will
return a syntax error. It returns a response when done or when the timeout
expires.
Field
Remarks
Command
Command number in hex preceded by AAH
Family Code
Tag Family ID - 00H = all tags
Anticollision index
Number of tags-in-field expected
Start Address
The tag address where the fill will start
Fill Length
The number of tag addresses to be filled
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Tag Serial Number
The 8-byte serial number
Data Value Byte
The byte used to fill
Message Terminator
FFFFH
82
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
A response to a successful command will follow this form.
Field
Remarks
Command Echo
Command number in hex preceded by AAH
Number of Tags filled
0 = tag not found, 1 = tag filled
Command Status
One byte Error status
Message Terminator
FFFFH
EXAMPLE
Writes 'A' (41H) to a single tag, starting at tag address 0005H for the following next consecutive 40 bytes. The Family ID is turned off and the
Anticollision Index is set to expect 2-4 tags. A timeout of 2 seconds (07D0H
= 2000 x 1 msec increments) is set for the completion of the configuration.
Command from Host
Response from Host
MSB
LSB
Remarks
MSB
LSB
Remarks
AAH
94H
Perform Command 94
AAH
94H
Command Echo
00H
01H
Family ID/ Index 1
01H
00H
Ntag/Status
00H
05H
Start Address
FFH
FFH
Message Terminator
00H
28H
Fill Length
07H
D0H
Timeout
00H
01H
SN byte 1
00H
ACH
SN byte 2
00H
42H
SN byte 3
00H
D0H
SN byte 4
00H
27H
SN byte 5
00H
1CH
SN byte 6
00H
65H
SN byte 7
00H
33H
SN byte 8
00H
41H
Fill byte
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
83
ABxS Command 95 (95H): SN Block Read
DESCRIPTION
Read a block of data from a specified RFID tag.
DISCUSSION
This command is used to read segments of data from contiguous areas of tag
memory. It is capable of handling up to 48 bytes of data transferred to the
host with one command if there is no tag Family ID. The timeout value is
given in 1 msec increments and can have a value of 1EH to FFFEH (65,534
ms). When the timeout is set to 0, the LRP830 will return a syntax error.
The SN Block Read consists of Family ID and an Anticollision Index, a start
address and length, followed by a timeout value. The 8-byte serial number of
the target tag is specified. If the read length exceeds the last tag address, the
LRP830 will return error message in the status byte. It returns a response
when done or when the timeout expires.
The data read from the tag is returned in the LSB of the register, and the
MSB is always 00H. A special error packet (AAH FFH) is sent if the timeout expires.
Field
Remarks
Command
Command number in hex preceded by AAH
Tag Family
Tag Family ID - 00H = all tags
Anticollision index
Number of tags expected
Start Address
The tag address where the read will start
Read Length
The numbers of tag addresses to be read
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Tag Serial Number
8-byte tag serial number
Message Terminator
FFFFH
84
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE:
Reads 4 bytes of data from the tag specified by serial number starting at
address 0001H. A timeout of 2 seconds (07D0H = 2000 x 1 msec increments) is set for the completion of the SN Block Read. The Family ID byte
is set to zero. The Anticollision Index is set to 2, expecting 4-8 tags in the
field.
Command from Host
Response from LRP830
MSB
LSB
Remarks
MSB
LSB
Remarks
AAH
95H
Perform Command 95
AAH
95H
Command Echo
00H
02H
Tag Family 00/ Index 2
00H
30H
Data byte 1
00H
01H
Start Address
00H
31H
Data byte 2
00H
04H
Read Length
00H
32H
Data byte 3
07H
D0H
Timeout
00H
33H
Data byte 4
00H
ABH
SN byte 1
01H
00H
Ntag/Status
00H
02H
SN byte 2
FFH
FFH
Message Terminator
00H
F3H
SN byte 3
00H
55H
SN byte 4
00H
C5H
SN byte 5
00H
2DH
SN byte 6
00H
41H
SN byte 7
00H
A0H
SN byte 8
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
85
ABxS Command 96 (96H): SN Block Write
DESCRIPTION
Write a block of data to a single RFID tag specified by its serial number.
DISCUSSION
This command is used to write segments of data to contiguous areas of tag
memory. It is capable of transferring up to 48 bytes of data transferred from
the Host with one command. The timeout value is given in 1 msec increments and can have a value of 1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will return a syntax error.
The SN Block Write consists of a Family ID, Anticollision Index, and start
address followed by the data stream to be written to the RFID tag. If the
write range exceeds the last tag address, the LRP830 will return an error
message 21H, invalid format. It returns a response when done or when the
timeout expires.
The data to be written to the tag is contained in the LSB of the register, and
the MSB is always 00H.
Field
Remarks
Command
Command number in hex preceded by AAH
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags-in-field expected
Start Address
The tag address where the write will start
Write Length
The number of tag addresses to be written to
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Tag Serial Number
8-byte tag serial number
Write Data
The data to be written (1-48 bytes)
Message Terminator
FFFFH
86
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE:
Writes 4 bytes of data, starting at address 0001H. A timeout of 2 seconds
(07D0H = 2000 x 1 msec increments) is set for the completion of the Block
Write. The Family ID byte is set to 0 and the Anticollision Index is set to 2
for this example.
Command from Host
Response from LRP830
MSB
LSB
Remarks
MSB
LSB
AAH
96H
Perform Command 96
AAH
96H
Command Echo
02H
02H
Tag Family 02/ Index 2
01H
00H
Ntags/Status
00H
01H
Start Address
FFH
FFH
Message Terminator
00H
04H
Write Length
07H
D0H
Timeout
00H
A4H
SN byte 1
00H
6CH
SN byte 2
00H
18H
SN byte 3
00H
92H
SN byte 4
00H
2DH
SN byte 5
00H
34H
SN byte 6
00H
DEH
SN byte 7
00H
20H
SN byte 8
00H
40H
Data byte 1
00H
41H
Data byte 2
00H
42H
Data byte 3
00H
43H
Data byte 4
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Remarks
87
ABxS Command 97 (97H): SN Block Read All
DESCRIPTION
Read a block of data from all RFID tags-in-field or those with the specified
Family ID. Return the serial number of the tags read, along with tag data.
DISCUSSION
This command is used to read segments of data from contiguous areas of tag
memory. It is capable of handling up to 48 bytes of data transferred to the
host with one command if there is no tag family ID. The timeout value is
given in 1 msec increments and can have a value of 1EH to FFFEH (65,534
ms). When the timeout is set to 0, the LRP830 will return a syntax error.
The response to this command will contain the serial number of the responding tags preceding the data from those tags. The termination packet is transmitted when the timeout expires. Each packet will be sent to the host as soon
as it is available. The returned serial numbers can be used to read/write to
tags-in-field via the SN Block Read/Write command.
The SN Block Read All consists of Family ID, Anticollision Index, a start
address and length, followed by a timeout value and the message terminator
FFFFH. A special termination packet is sent when the timeout expires. If the
Anticollision Index is 0, a response is returned when the operation is successfully completed on 1 tag, or when the timeout expires. A termination
packet is not sent for successful completion if the Anticollision Index is 0.
If the read length exceeds the last tag address, the LRP830 will return an
invalid format error message (error code 21H).
Field
Remarks
Command
Command number in hex preceded by AAH
Tag Family
Tag Family ID - 00H = all tags
Anticollision index
Number of tags expected
Start Address
The tag address where the read will start
Read Length
The number of tag addresses to be read
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Message Terminator
FFFFH
NOTE:
This command can not be used over a DeviceNet interface.
88
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE:
Reads 2 bytes of data from the tag starting at address 0001H. A timeout of 2
seconds (07D0H = 2000 x 1 msec increments) is set for the completion of
the SN Block Read All. The Family ID byte is set to zero so all tags will be
read. The Anticollision Index is set to 2 so 4-8 tags are expected. Two tags
respond with read data.
Command from Host
Response from LRP830
MSB
LSB
Remarks
MSB
AAH
97H
Perform Command 97
AAH
97H
Command Echo/Tag 1
00H
02H
Tag Family 00/ Index 2
00H
10H
SN byte 1/Tag 1
00H
01H
Start Address
00H
43H
SN byte 2/Tag 1
00H
02H
Read Length
00H
6CH
SN byte 3/Tag 1
07H
D0H
Timeout
00H
73H
SN byte 4/Tag 1
FFH
FFH
Message Terminator
00H
92H
SN byte 5/Tag 1
00H
C0H
SN byte 6/Tag 1
00H
D6H
SN byte 7/Tag 1
00H
54H
SN byte 8/Tag 1
00H
30H
Data byte 1/Tag 1
00H
31H
Data byte 2/Tag 1
FFH
FFH
Terminator/ Tag 1
LSB
Remarks
AAH
97H
Command Echo/Tag 2
00H
08H
SN byte 1/Tag 2
00H
0AH
SN byte 2/Tag 2
00H
81H
SN byte 3/Tag 2
00H
18H
SN byte 4/Tag 2
00H
23H
SN byte 5/Tag 2
00H
CCH
SN byte 6/Tag 2
00H
D0H
SN byte 7/Tag 2
00H
EFH
SN byte 8/Tag 2
00H
40H
Data byte 1/Tag 2
00H
41H
Data byte 2/Tag 2
FFH
FFH
Terminator/ Tag 2
AAH
FFH
Command Echo/end
02H
08H
Ntags/Status
FFH
FFH
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
89
6.5
ABx Fast
Fast Protocol
Protocol
6.4 ABx
The difference from the standard ABx are:
The command/response packet contains the packet size
You can include a checksum in the command
The headers and terminator are ASCII characters
Since ABx Fast is a binary protocol, the Xon/Xoff handshake
cannot be used.
ABx Command Packet Structure:
The command protocol is based on the following minimal packet structure.
The data field and the checksum may not be present depending on the command type and your checksum setting.
Field
Number of Bytes Content
Header
(02H, 02H)
Command Size
Packet length in bytes excluding the header, command
size, checksum and terminator bytes.
Command Code
Command
(Data)
variable
command data/parameters
(Checksum)
Optional Checksum
Terminator
(03H)
Following a successful operation, the LRP830 will respond with the following. The data field and the checksum may not be present depending on your
checksum setting.
Field
Number of Bytes Content
Header
(02H, 02H)
Response Size
Packet length in bytes excluding the header, response
size, checksum and terminator bytes.
Command Echo
Command
(Data)
variable
response data
(Checksum)
Optional Checksum
Terminator
(03H)
90
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
If the LRP830 Reader/Writer encounters a fault it will respond with the following:
Field
Number of Bytes Content
Header
(02H, 02H)
Response Size
Packet length in bytes excluding the header, packet
size, checksum and terminator bytes. (02H in this case)
Error Flag
FFH
Error Code
Hex error code, see Table 7 for details
(Checksum)
Optional Checksum
Terminator
(03H)
The Header and Terminator are always STX-STX and ETX
respectively.
All other bytes are interpreted as binary data (0 - 255 dec).
Fields with two bytes are sent most significant byte (MSB)
first.
The sequence for each command is given with the response format in the
following section.
Command/Response Size
The ABx Fast requires that the length of the packet be included in the command. All parameters and data between the Command/Response Size and
the Checksum or Terminator bytes must be accounted for in the command/response size word. This includes all command codes and parameters
such as field definitions for Block Read/Writes. The command/response size
will be the same with, or without, a checksum.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
91
Checksum
Since the DeviceNet protocol has its own data validation, it is not necessary
to use the checksum option when sending ABxF commands over the
DeviceNet bus.
The optional checksum must be enabled from the operating mode menu to
be available. The checksum is calculated by adding all the byte values in the
packet (less the values in the header, checksum if present, and terminator),
discarding byte overflow and subtracting the byte sum from FFH. Thus,
when the packet length through the checksum are added as byte values, the
sum will be FFH.
EXAMPLE
The following is a typical command using a checksum.
Command from Host
Field
Contents
Header

02H
Command Size
00H
Command Code
01H
02H
03H
Timeout
Sum these values to calculate
the checksum
07H
D0H
Checksum
24H
Terminators
03H
The summed values begin with the Command Size and end with the timeout
value. That sum, less overflow, is subtracted from FFH for the checksum
value.
Thus: 00 + 03 + 01 +07 + D0 = DB
FF - DB = 24H
The optional Checksum is included in the following command explanations.
92
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 4 (04H): Fill Tag
DESCRIPTION
Fill an RFID tag with a one byte value over multiple contiguous addresses.
DISCUSSION
This command is commonly used to clear an RFID tag's memory. It writes a
one byte value repetitively across a specified range of tag addresses.
The fill function requires one data value byte, a starting address, and a fill
length. It will fill the tag with the data value byte, starting at the specified
start address for the specified number of consecutive bytes. When Fill
Length is set to 0, the LRP830 will write fill data from the start address to
the end of the tag’s memory. The timeout value is given in 1 msec increments and can have a value of 1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will return a syntax error.
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes. 0008H for this command
Command
04H
Start Address
2-byte value for the starting tag address
Fill Length
2-byte value for the length of the fill in number of bytes
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH).
Data value byte
1 byte of fill
Checksum
Optional Checksum
Terminator

A response to a successful command will follow this form.
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes. 0001H for this command
Command
04H
Checksum
Optional Checksum
Terminator

Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
93
EXAMPLE
Writes 'A' (41H) to the tag starting at address 0005H for the following next
consecutive 40 bytes. A timeout of 2 seconds (07D0H = 2000 x 1 msec increments) is set for the completion of the configuration.
Response from LRP830
Command from Host
Field
Bytes Contents
Field
Bytes Contents
Header

02H
Header

02H
Command Size
00H
Response Size
00H
04H
03H
02H
02H
01H
08H
Command Code
04H
Command Echo
Start address
00H
Terminators
05H
Block Size
00H
28H
Timeout,
2 seconds
07H
Data Value Byte
41H
Terminators
03H
94
D0H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 5 (05H): Block Read
DESCRIPTION
Read a block of data from an RFID tag.
DISCUSSION
This command is used to read segments of data from contiguous areas of tag
memory. It is capable of handling up to 48 bytes of data transferred to the
host. The timeout value is given in 1 msec increments and can have a value
of 1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830
will return a syntax error.
The Block Read consists of a start address and length, followed by a timeout
value and a message terminator as shown below.
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes. 0007H for this command
Command
05H
Start Address
2-byte value for the starting tag address
Block Size
2-byte value for the length of the read in number of bytes
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH).
Checksum
Optional Checksum
Terminator

Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
95
EXAMPLE:
Reads 4 bytes of data from the tag starting at address 0001H. A timeout of 2
seconds (07D0H = 2000 x 1 msec increments) is set for the completion of
the Block Read.
Response from LRP830
Command from Host
Field
Contents
Field
Contents
Header

02H
Header

02H
Command Size
00H
Response Size
00H
02H
02H
05H
07H
Command Code
05H
Command Echo
05H
Start address
00H
Data from
address 0001H
05H
Data from
address 0002H
AAH
Data from
address 0003H
E7H
Data from
address 0004H
0AH
Terminator
03H
01H
Block size
00H
04H
Timeout,
2 seconds
07H
Terminator
03H
96
D0H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 6 (06H): Block Write
DESCRIPTION
Write a block of data to an RFID tag.
DISCUSSION
The Block Write command is used to write segments of data to contiguous
areas of tag memory. It is capable of handling up to 48 bytes of data transferred to the host. The timeout value is given in 1 msec increments and can
have a value of 1EH to FFFEH (65,534 ms). When the timeout is set to 0,
the LRP830 will return a syntax error.
The Block Write command consists of a start address followed by the data to
be written to the RFID tag. If the write range exceeds the last tag address,
the LRP830 will return an invalid format error message (error code 21H).
Field
Content
Header

Packet Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes. 0007H plus the number of data bytes
Command
06H
Start Address
2-byte value for the starting tag address
Block Size
2-byte value for the length of the write in number of bytes
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH).
Data
Data bytes to be written
Checksum
Optional Checksum
Terminator

Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
97
EXAMPLE:
Writes 4 bytes of data to the tag starting at address 0000H. A timeout of 2
seconds (07D0H = 2000 x 1 msec increments) is set for the completion of
the Block Write.
Response from LRP830
Command from Host
Field
Contents
Field
Contents
Header

02H
Header

02H
Command Size
00H
Response Size
00H
02H
02H
01H
0BH
Command Code
06H
Command Echo
06H
Start address
00H
Terminators
03H
00H
Block Size
00H
04H
Timeout,
2 seconds
07H
Data to write to
address 0000H
52H
Data to write to
address 0001H
46H
Data to write to
address 0002H
49H
Data to write to
address 0003H
44H
Terminators
03H
98
D0H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 7 (07H): Read Tag Serial Number
DESCRIPTION
This command retrieves the 8-byte tag serial number.
DISCUSSION
Each LRP tag has an unique (264 possible numbers) serial number. This
number can not be changed and is not part of the 48 available data bytes.
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes. 0003H for this command
Command
07H
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Checksum
Optional Checksum
Terminator

Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
99
EXAMPLE:
This example will wait until a tag is in range and then reads the 8-byte identification number. In this example the SN is 1E6E3DC200000000 in hexadecimal.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
02H
02H
Header

Command Size
00H
Response Size
00H
Command Code
07H
Command Echo
Timeout
07H
First SN byte
1EH
D0H
Second SN byte
6EH
03H
Third SN byte
3DH
Fourth SN byte
C2H
Fifth SN byte
00H
03H
Terminators
100
02H
09H
07H
Sixth SN byte
00H
Seventh SN byte
00H
Eighth SN byte
00H
Terminators
03H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 8 (08H): Tag Search
DESCRIPTION
Check to see if there is an RFID tag in the LRP830 field.
DISCUSSION
This command will activate the reader/write to "look" for a tag in the RF
field. If the LRP830 finds a tag it will return a command echo to the host.
The timeout value is given in 1 msec increments and can have a value of
1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will
return a syntax error. If no tag is present it will return an error message. See
Section 6.2 for information on the error messages.
Field
Content
Header

Command Size
Command length in bytes excluding the header, command size, checksum
and terminator bytes. 0003H for this command
Command
08H
Timeout
2-byte value for the timeout in 1 ms units (1EH - FFFEH)
Checksum
Optional Checksum
Terminator

EXAMPLE
Checks for an RFID tag in the RF field. A timeout of 2 seconds (07D0H =
2000 x 1 msec increments) is set for the completion of the Tag Search.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
02H
02H
Header

Command Size
00H
Response Size
00H
Command Code
08H
Command Echo
08H
Timeout
07H
Terminators
03H
03H
02H
01H
D0H
Terminators
03H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
101
ABxF Command D (0DH): Continuous Block Read
DESCRIPTION
Send block reads continuously to any tag in range of the antenna. When a
tag enters the RF field, it is read and the data passed to the host computer.
The LRP830 continues to read the tag but will not send the same data to the
host until the tag has been outside the RF field for a specified time period.
This Delay Between Identical Decodes feature prevents redundant data
transmissions when the LRP830 is in Continuous Block Read mode.
DISCUSSION
The initiate/cancel Continuous Block Read command contains three parameters: read length, start address, and delay between identical decodes. The
read length parameter switches the mode. Any valid, non-zero length will set
the LRP830 into Continuous Block Read mode. A read length value of 00H
will turn Continuous Block Mode off.
The Delay Between Identical Decodes value can have a value of 0 to 60
seconds. When the Delay Between Identical Decodes is set to 0, the LRP830
will continuously read AND transmit tag data to the host. This can flood the
buffers and cause communication errors and data loss.
If the LRP830 receives other commands from the host, it will execute them
and then resume Continuous Block Read mode. To exit Continuous Block
Read mode, issue the command with a read length of 0.
In Continuous Block Read mode, the LEDs will display as follows:
LED
Behavior
Description
ANT LED
ON
Assumes the Antenna is powered and functioning
CONFIG LED BLINK
Tag entered the RF field
RF LED
ON
A tag has been read and is still in the field
RF LED
OFF
A read tag has been out of range for the specified time
NOTE:
This command can not be used over a DeviceNet interface.
102
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
The command is formatted as follows.
Field
Content
Header

Command Size
Command length in bytes excluding the header, command size, checksum
and terminator bytes.
Command
0DH
Start Address
2 byte value for the start address in the tag
Read Length
2 byte value for the block read length
Delay Between Identical Delay value given in 1 second units
Reads
Checksum
Optional Checksum
Terminator

EXAMPLE
This example places the LRP830 in Continuous Block Read mode and reads
8 bytes of data from the tag starting at address 0001H. A delay between
identical reads of 2 seconds (0002H = 2 x 1 second increments) is set.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
02H
02H
Header

Command Size
00H
Response Size
00H
Command Code
0DH
Command Echo
0DH
Start Address
00H
Terminator
03H
06H
02H
01H
01H
Read Length
00H
08H
Delay Between Identical 02H
Decodes
Terminator
03H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
103
The LRP830 will first return an acknowledgment of the command followed
by a response containing read data when a tag enters the antenna field.
Response from LRP830
Field
Contents
Header

02H
Command Size
00H
Command Echo
0DH
Data Byte 1
05H
Data Byte 2
AAH
Data Byte 3
E7H
Data Byte 4
0AH
Data Byte 5
05H
Data Byte 6
AAH
Data Byte 7
E7H
Data byte 8
0AH
02H
09H
Terminator 03H
104
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 10 (10H): Set Output
DESCRIPTION
Set the levels of the output lines and output LEDs "A" through "D."
DISCUSSION
This command is used to set the levels of the digital output lines using bit
logic. The four least significant bit toggle the output levels; 1 = ON and
0 = OFF. The following chart shows the hex values for all output high combinations. To reset all output, issue the command with 0000H for the Output
Pattern byte.
MSB
LSB
Remarks
00H
00H
Reset A, B, C, D
00H
01H
Set Output A - Reset B, C, D
00H
02H
Set Output B - Reset A, C, D
00H
03H
Set Output A, B - Reset C, D
00H
04H
Set Output C - Reset A, B, D
00H
05H
Set Output A, C - Reset B, D
00H
06H
Set Output B, C - Reset A, D
00H
07H
Set Output A, B, C - Reset D
00H
08H
Set Output D - Reset A, B, C
00H
09H
Set Output A, D - Reset B, C
00H
0AH
Set Output B, D - Reset A, C
00H
0BH
Set Output A, B, D - Reset C
00H
0CH
Set Output C, D - Reset A, B
00H
0DH
Set Output A, C, D - Reset B
00H
0EH
Set Output B, C, D - Reset A
00H
0FH
Set Output A, B, C, D
Field
LSB Bit 3 LSB Bit 2 LSB Bit 1 LSB Bit 0
Output D Output C Output B Output A
Content
Header

Command Size
Command length in bytes excluding the header, command size, checksum
and terminator bytes. 0002H for this command
Command
10H
Output Pattern
1 byte representing the desired output settings in bits 0-3
Checksum
Optional Checksum
Terminator

Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
105
EXAMPLE
The following example sets Output B only and resets A, C, and D.
Response from LRP830
Command from Host
Field
Contents
Field
Contents
Header

02H
Header

02H
Command Size
00H
Response Size
00H
02H
02H
01H
02H
Command Code
10H
Command Echo
10H
Output Value Byte
02H
Terminator
03H
Terminator
03H
106
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 11 (11H): Input Status
DESCRIPTION
Retrieves the input line levels.
DISCUSSION
This command is used to monitor the levels of the digital input lines using
bit logic. The four least significant bit display the input levels; 1 = ON and
0 = OFF. The following chart shows all possible conditions that can be
returned in the response.
MSB
LSB
Remarks
LSB Bit 3
Input D
LSB Bit 2
Input C
LSB Bit 1
Input B
LSB Bit 0
Input A
00H
00H
00H
01H
Inputs A, B, C, D, OFF
Input A, ON - B, C, D, OFF
00H
00H
02H
Input B, ON - A, C, D, OFF
03H
Input A, B, ON - C, D, OFF
00H
04H
Input C, ON - A, B, D, OFF
00H
05H
Input A, C, ON - B, D, OFF
00H
06H
Input B, C, ON - A, D, OFF
00H
07H
Input A, B, C, ON - D, OFF
00H
08H
Input D, ON - A, B, C, OFF
00H
09H
Input A, D, ON - B, C, OFF
00H
0AH
Input B, D, ON - A, C, OFF
00H
0BH
Input A, B, D, ON - C, OFF
00H
0CH
Input C, D, ON - A, B, OFF
00H
0DH
Input A, C, D, ON - B, OFF
00H
0EH
Input B, C, D, ON - A, OFF
00H
0FH
Input A, B, C, D, ON
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes.
Command
11H
Checksum
Optional Checksum
Terminator

Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
107
EXAMPLE
The following example shows only Input B is ON and A, C, and D are OFF.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
Header

02H
Command Size
00H
Response Size
00H
Command Code
11H
Command Echo
11H
Terminators
03H
Input Value Byte
02H
Terminators
03H
02H
01H
108
02H
02H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 84 (84H): Fill All
DESCRIPTION
Fill all RFID tags-in-field or all tags in the same family, with a one byte
value over multiple contiguous addresses.
DISCUSSION
This command is commonly used to clear an RFID tag's memory. It writes a
one byte value repetitively across a specified range of tag addresses. All tags
present in the antenna field with the specified Family ID will be affected by
this command. The LRP830 will return a response after the timeout expires.
The Fill All function requires one data value byte, a starting address, and a
fill length. It will fill the tag with the data value byte, starting at the specified
start address for the specified number of consecutive bytes. The Fill Length
must be set to a non-zero value (1-48).
The timeout value is given in 1 msec increments and can have a value of
1EH to FFFEH (65,534 ms). When the Anticollision Index is not zero (multiple tag-in-field enabled), the LRP830 returns a response after the timeout
expires. If the Anticollision Index is 0, a response is returned when a successful operation is performed on 1 tag, or when the timeout has expired.
When the timeout is set to 0, the LRP830 will return a syntax error.
Field
Content
Header

Command Size
Command length in bytes excluding the header, packet size, checksum and
terminator bytes. 0008H for this command
Command
84H
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Start Address
2-byte value for the starting tag address
Fill Length
2-byte value for the length of the fill in number of bytes (1-48)
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH).
Data value byte
1 byte of fill
Checksum
Optional Checksum
Terminator

NOTE:
This command can not be used over a DeviceNet interface.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
109
EXAMPLE
Writes 'A' (41H) to all tags with Family ID 03H, starting at address 0005H
for the following next consecutive 40 bytes. A timeout of 2 seconds (07D0H
= 2000 x 1 msec increments) is set for the completion of the configuration.
Four tags are found and filled successfully.
Command from Host
Response from LRP830
Field
Bytes Contents
Field
Bytes Contents
Header

02H
02H
02H
Header

Command Size
00H
Response Size
00H
0AH
02H
03H
Command Code
84H
Command Echo
84H
Family ID
03H
Numbers of tags
04H
Anticollision Index
02H
Status byte
08H
Start address
00H
Terminators
03H
Fill Length
00H
05H
28H
Timeout,
2 seconds
07H
Data Value Byte
41H
Terminators
03H
110
D0H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 85 (85H): Block Read All
DESCRIPTION
Read a block of data from all RFID tags-in-field or all those with the specified Family ID.
DISCUSSION
This command is used to read segments of data from contiguous areas of tag
memory. The timeout value is given in 1 msec increments and can have a
value of 1EH to FFFEH (65,534 ms). When the timeout is set to 0, the
LRP830 will return a syntax error.
The Block Read All consists of a Family ID, an Anticollision Index, a start
address and length, followed by a timeout value and a message terminator as
shown below.
If the read length exceeds the last tag address, the LRP830 will return an invalid format error message (error code 21H). A special termination packet
is sent when the timeout expires. If the Anticollision Index is set to 0, a
response is returned after successful completion of the operation to 1 tag, or
when the timeout expires. When the Anticollision Index is 0, no special termination packet is sent after timeout.
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes.
Command
85H
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Start Address
2-byte value for the starting tag address
Block Size
2-byte value for the length of the read in number of bytes
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Checksum
Optional Checksum
Terminator

NOTE:
This command can not be used over a DeviceNet interface.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
111
EXAMPLE:
Reads 4 bytes of data from tags with Family ID AAH, starting at address
0001H. A timeout of 2 seconds (07D0H = 2000 x 1 msec increments) is set
for the completion of the Block Read All. The Tag Family byte is set to zero
so all tags will be read. The Anticollision Index is set to 2, expecting 4-8
tags. Two tags respond with data.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
02H
02H
Header

Command Size
00H
Response Size
00H
09H
02H
03H
Command Code
85H
Command Echo/Tag 1
85H
Family ID
AAH
02H
Data from
address 0001H
05H
Anticollision Index
Start address
00H
Data from
address 0002H
AAH
Block size
00H
Terminator
03H
Header

02H
Response Size
00H
01H
02H
Timeout,
2 seconds
07H
Terminator
03H
D0H
02H
03H
Command Echo/Tag 2
85H
Data from
address 0001H
05H
Data from
address 0002H
AAH
Terminator
03H
Header

02H
Response Size
00H
Command Status
FFH
Number of tags
02H
Status Byte
08H
Terminator
03H
02H
03H
112
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 86 (86H): Block Write All
DESCRIPTION
Write a block of data to an RFID tag.
DISCUSSION
The Block Write All command is used to write segments of data to contiguous areas of tag memory. The timeout value is given in 1 msec increments
and can have a value of 1EH to FFFEH (65,534 ms). When the timeout is
set to 0, the LRP830 will return a syntax error.
The Block Write All consists of a Family ID, Anticollision Index, a start address followed by the data stream to be written to the RFID tag. If the write
range exceeds the last tag address, the LRP830 will return an invalid format
error message (error code 21H). The LRP830 will return a response when
the timeout expires. If the Anticollision Index is 0, a response is returned
when the operation is successfully completed on 1 tag, or when the timeout
expires.
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes. 0009H plus the number of data bytes
Command
86H
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Start Address
2-byte value for the starting tag address
Block Size
2-byte value for the length of the write in number of bytes
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH).
Data
Data bytes to be written
Checksum
Optional Checksum
Terminator

NOTE:
This command can not be used over a DeviceNet interface.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
113
EXAMPLE:
Writes 4 bytes of data to the tag starting at address 0000H. A timeout of 2
seconds (07D0H = 2000 x 1 msec increments) is set for the completion of
the Block Write All. Family ID is set to 00H so all tags-in-field will be written to. The Anticollision Index is 5, expecting 32-64 tags. Five tags are
written to.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
Header

02H
02H
Command Size
00H
Response Size
00H
0DH
02H
03H
Command Code
86H
Command Echo
86H
Family ID
00H
Ntag
05H
Anticollision Index
04H
Status
08H
Start address
00H
Terminators
03H
00H
Block Size
00H
04H
Timeout,
2 seconds
07H
Data to write to
address 0000H
52H
Data to write to
address 0001H
46H
Data to write to
address 0002H
49H
Data to write to
address 0003H
44H
Terminators
03H
114
D0H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 87 (87H): Read Tag SN All
DESCRIPTION
This command retrieves the 8-byte tag serial number from all tags-in-field or
those with the specified Family ID.
DISCUSSION
Each LRP tag has an unique (264 possible numbers) serial number. This
number can not be changed and is not part of the 48 available data bytes.
The timeout value is given in 1 msec increments and can have a value of
1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will
return a syntax error. A special termination packet (starting with AAH FFH)
is sent when the timeout expires. If the Anticollision Index is set to 0, a response is returned when the operation is successfully completed to 1 tag, or
when the timeout expires. No special termination packet is sent upon successful completion if Anticollision Index is set to 0.
Field
Content
Header

Command Size
Packet length in bytes excluding the head er, command size, checksum and
terminator bytes. 0005H for this command
Command
87H
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Checksum
Optional Checksum
Terminator

NOTE:
This command can not be used over a DeviceNet interface.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
115
EXAMPLE:
This example will read the 8-byte serial number from all tags permitted by
the Family ID and Anticollision Index. In this example, one tag responds
and the serial number is 1E6E3DC200000000 in hexadecimal.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
Header

02H
02H
Command Size
00H
Response Size
00H
Command Code
87H
Command Echo
87H
Family ID
00H
SN byte 1
1EH
Anticollision Index
01H
SN byte 2
6EH
Timeout
07H
SN byte 3
3DH
D0H
SN byte 4
C2H
03H
SN byte 5
00H
SN byte 6
00H
SN byte 7
00H
SN byte 8
00H
Checksum
E4H
Header

02H
Response Size
00H
Command Status
FFH
Number of Tags
01H
Status Byte
08H
Terminator
03H
05H
Terminator
02H
09H
02H
03H
116
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 88 (88H): Tag Search All
DESCRIPTION
Check to see if there is any RFID tags in the LRP830 antenna field.
DISCUSSION
This command will activate the LRP830 to "look" for a tag in the RF field.
As soon as the LRP830 finds a tag it will return a command echo to the host.
The timeout value is given in 1 msec increments and can have a value of
1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will
return a syntax error. If no tag is present it will return an error message. See
Section 6.2 for information on the error messages.
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes. 0005H for this command
Command
88H
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Timeout
2-byte value for the time in 1 ms units
Checksum
Optional Checksum
Terminator

NOTE:
This command can not be used over a DeviceNet interface.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
117
EXAMPLE
Checks for an RFID tag in the RF field. A timeout of 2 seconds (07D0H =
2000 x 1 msec increments) is set for the completion of the Tag Search All.
A tag is found.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
Header

02H
Command Size
00H
Response Size
00H
Command Code
88H
Command Echo
88H
Family ID
00H
Number of Tags
01H
Anticollision Index
02H
Status byte
00H
Timeout
07H
Terminators
03H
02H
05H
02H
03H
D0H
Terminators
118
03H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 89 (89H): EAS Set/Reset All
DESCRIPTION
Sets or resets the EAS feature in tag memory for all tags in range when the
command is issued.
DESCRIPTION
The commands contains a 1 byte parameter that enables or disables the EAS
feature in tags that receive the command. When the EAS Set/Reset All command is issued, the LRP830 will respond with the number of tags affected. If
the LRP830 return a 0 for Ntag it means that no tags were set or reset by the
command.
The timeout value is given in 1 msec increments and can have a value of
1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will
return a syntax error. When multiple tag-in-field is enabled (Anticollision index is not 0), the LRP830 will return a response when the timeout period expires. When multiple tag-in-field is disabled, the LRP830 will return a
response when it reads a tag or the timeout expires.
Field
Content
Header

Command Size
Command length in bytes excluding the header, command size, checksum
and terminator bytes.
Command
89H
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Set/Reset
1 = enable, 0 = disable EAS
Checksum
Optional Checksum
Message Terminator

Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
119
EXAMPLE
This example assumes that the tags-in-field are not enabled for the EAS
feature. It will enabled the EAS feature for tags with Family ID 09H. The
Anticollision Index is 2, so 4-8 tags are expected in the field. When the command is issued, 5 tags with Family ID 09H are found and enabled for EAS.
Response from LRP830
Command from Host
Field
Contents
Field
Contents
Header

02H
Header

02H
Command Size
00H
Response Size
00H
Command Code
89H
Command Echo
89H
Family ID
09H
Number of Tags
05H
Anticollision Index
02H
Status byte
08H
Timeout
07H
Terminator
03H
02H
02H
03H
05H
D0H
Set/Reset
01H
Terminator
03H
120
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 8A (8AH): EAS Start/Stop
DESCRIPTION
If are using the EAS feature in your application, the EAS Start/Stop command enters and exits the LRP830 from EAS mode.
DISCUSSION
When EAS mode has been started, the LRP830 will return a response when
one or more EAS-enabled tags have entered the antenna field. It will send a
second response when all EAS-enabled tags have exited the field. The command contains a control byte that toggles EAS: 1 = start, 0 = stop. A Family
ID can be set so that only EAS-enabled tags from the specified Family trigger EAS responses. The Anticollision Index is ignored and should be set to
00H for this command.
The EAS mode also controls the CONFIG, ERROR and RF LEDs. The following table explains LED behavior.
LED(s)
Behavior
Description
CONFIG,
ERROR,
RF LED
OFF
No EAS-enabled tag in field
CONFIG LED BLINK
EAS-enabled tag entered field.
RF LED
ON
EAS tag has been read. LED will remain ON until all EAS tags have left
the field.
ERROR LED
BLINKS
Last EAS tag left the field.
IMPORTANT:
EAS mode prevents any other commands from being acknowledged or executed until EAS has been stopped.
Field
Content
Header

Command Size
Command length in bytes excluding the header, command size, checksum and
terminator bytes.
Command
8AH
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Anticollision not considered for this command, 00H
Start/Stop
1 = Start and 0 = Stop EAS
Checksum
Optional Checksum
Message Terminator
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
121
EXAMPLE
This example starts EAS mode. Three responses follow. The first is a command acknowledgment. The LRP830 sends the second when the first
EAS-enabled tag enters the field, A third response is sent when field is clear
of EAS-enabled tags. Family ID is set to 0 so that any EAS-enabled tag will
trigger responses.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
02H
02H
Header

Command Size
00H
Response Size
00H
03H
02H
03H
Command Code
8AH
Command Echo
8AH
Family ID
00H
Number of Tags
FFH
Anticollision Index
00H
Status byte
00H
Start/Stop
01H
Terminator
03H
Terminator
03H
When an EAS-enabled tag enters the antennas’ field, the LRP830 responds
with an EAS tag-in-field response.
Response from LRP830
Field
Contents
Header

02H
Response Size
00H
Command Echo
8AH
Number of Tags
01H
02H
03H
Status byte
00H
Terminator
03H
122
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
When all EAS-enabled tags have left the field, the LRP830 will send the following response.
Response from LRP830
Field
Contents
Header

02H
Response Size
00H
02H
03H
Command Echo
8AH
Number of Tags
00H
Status byte
00H
Terminator
03H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
123
ABxF Command 8D (8DH): Continuous Read All
DESCRIPTION
Starts and stops Continuous Read All mode for multiple tags.
DISCUSSION
Continuous Read All mode is set by the length byte. To start Continuous
Read All mode send the command with valid, non-zero value for the length
of the read (1-48). Stop the mode by sending the command with a read
length of 0. While in this mode, any other command can be issued and it
will be handled properly. After processing the new command, the LRP will
resume the Continuous Read All mode.
The command has a parameter, tag delay, that can prevent multiple reads of
the same tag. A tag is not read a second time until a specified number of
tags have been read since it was last read. Allowed value are from 0 up to
255 (FFH), where 0 means the tag can be re-read anytime. When Continuous Read All mode is interrupted with other commands, the tag delay count
is stopped during execution of the other commands and then resumed.
The LRP830 will respond with an acknowledge packet followed by data
packets for each tag read.
CONFIG LED blinks after each packet transmission.
Field
Content
Header

Command Size
Command length in bytes excluding the header, command size, checksum and
terminator bytes.
Command
8DH
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Anticollision not considered for this command, 00H
Start Address
Tag address for the start of the read
Read Length
1-48 = start, 0 = stop
Tag Delay
Number of tags that must be read before the same tag will be read again (0-255)
Checksum
Optional Checksum
Message Terminator
NOTE:
This command can not be used over a DeviceNet interface.
124
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE
Reads 4 bytes of data from the tag starting at address 0001H. The Family ID
byte is set to zero so all tags will be read. The Anticollision Index is set to 1
so 2 to 4 tags will be expected. The Tag Delay is set to 20 (14H). Two tags
respond with read data.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
Header

02H
Command Size
00H
Response Size
00H
02H
08H
02H
01H
Command Code
8DH
Command Echo
8DH
Family ID
00H
Terminator
03H
Anticollision Index
01H
Start Address
00H
Read Length
00H
01H
04H
Tag Delay
14H
Terminator
03H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
125
After the LRP830 sends the acknowledgment, it will send the read data from
the 2 tags.
Response from LRP830
Field
Contents
Header

02H
Response Size
00H
02H
05H
Command Echo/Tag 1
8DH
Data from
address 0001H
05H
Data from
address 0002H
AAH
Data from
address 0003H
21H
Data from
address 0004H
44H
Terminator
03H
Header

02H
Response Size
00H
Command Echo/Tag 2
85H
Data from
address 0001H
05H
Data from
address 0002H
AAH
Data from
address 0003H
21H
Data from
address 0004H
44H
Terminator
03H
02H
05H
126
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
ABxF Command 8E (8EH): Memory Lock All
DESCRIPTION
This command “locks” tag addresses in four byte blocks. Once bytes are
locked, they can not be unlocked.
DISCUSSION
The memory can be locked only in 4-byte blocks. The command passes
a two byte word with bits assigned to 4-byte blocks that can be locked.
Remaining bits can lock the EAS feature and the lock configuration itself.
When multiple tag-in-field is enabled (Anticollision Index is not 0), the
LRP830 will return a response when the timeout period expires. When multiple tag-in-field is disabled, the LRP830 will return a response when it locks
bytes or the timeout expires.
Attempting to write to locked bytes will return a write error timeout in the
status byte. If you write to addresses that contain both locked and
non-locked bytes, the LRP830 will return a write error in the status byte.
The configuration word formatted as shown below.
Byte
Lock LSB
Lock MSB
Bit
Description
Tag bytes 0-3
Tag bytes 4-7
Tag bytes 8-11
Tag bytes 12-15
Tag bytes 16-19
Tag bytes 20-23
Tag bytes 24-27
Tag bytes 28-31
Tag bytes 32-35
Tag bytes 36-39
10
Tag bytes 40-43
11
Tag bytes 44-47
12
Lock Configuration
13
Lock EAS feature
14
Reserved
15
Reserved
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
127
If a bit in the configuration word is set, then the corresponding block in the
tag is locked when the command is issued. If a bit in the configuration word
is cleared (0), then the corresponding block will not change. Once locked, a
block can not be unlocked.
The timeout value is given in 1 msec increments and can have a value of
1EH to FFFEH (65,534 ms). When the timeout is set to 0, the LRP830 will
return a syntax error.
The command is formatted as shown below.
Field
Remarks
Header

Command Size
Command length in bytes excluding the header, command size, checksum
and terminator bytes.
Command
8EH
Family Code
Tag Family ID - 00H = all tags
Anticollision index
Number of tags-in-field expected
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH)
Lock MSB
Bits 8-15 of the configuration word
Lock LSB
Bits 0-7 of the configuration word
Checksum
Optional Checksum
Message Terminator

128
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE
This example will lock bytes 0-3 on all tags-in-field with the Family ID of
02H. Two tags are found and locked.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
Header

02H
02H
Command Size
00H
Response Size
00H
Command Code
8EH
Command Echo
8EH
Family ID
02H
Number of Tags
02H
Anticollision Index
01H
Status byte
08H
07H
Terminator
03H
07H
Timeout
02H
03H
D0H
Lock MSB
00H
Lock LSB
01H
Terminator
03H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
129
ABxF Command 94 (94H): SN Fill
DESCRIPTION
Fill an RFID tag, identified by serial number, with a one byte value over
multiple contiguous addresses.
DISCUSSION
This command is commonly used to clear an RFID tag's memory. It writes a
one byte value repetitively across a specified range of tag addresses.
The SN Fill command requires a specific serial number of the tag to be
filled. It will fill the tag with the data value byte, starting at the specified start
address for the specified number of consecutive bytes. When Fill Length is
set to 0, the LRP830 will write fill data from the start address to the end of
the tags memory. The timeout value is given in 1 msec increments and can
have a value of 1EH to FFFEH (65,534 ms). When the timeout is set to 0,
the LRP830 will return a syntax error.
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes.
Command
94H
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Start Address
2-byte value for the starting tag address
Fill Length
2-byte value for the length of the fill in number of bytes
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH).
Tag Serial Number
8-byte tag serial number
Data value byte
1 byte of fill
Checksum
Optional Checksum
Terminator

130
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE
Writes 'A' (41H) to the tag specified by serial number starting at address
0005H for the following next consecutive 4 bytes. A timeout of 2 seconds
(07D0H = 2000 x 1 msec increments) is set for the completion of the configuration.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
02H
02H
Header

Command Size
00H
Response Size
00H
0EH
02H
03H
Command Code
94H
Command Echo
94H
Family ID
00H
Number of Tags
01H
Anticollision Index
02H
Status byte
00H
Timeout
07H
Terminators
03H
D0H
SN byte 1
ADH
SN byte 2
23H
SN byte 3
81H
SN byte 4
1DH
SN byte 5
C3H
SN byte 6
66H
SN byte 7
78H
SN byte 8
21H
Fill byte
41H
Terminators
03H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
131
ABxF Command 95 (95H): SN Block Read
DESCRIPTION
Read a block of data from an RFID tag.
DISCUSSION
This command is used to read segments of data from contiguous areas of tag
memory. The timeout value is given in 1 msec increments and can have a
value of 1EH to FFFEH (65,534 ms). When the timeout is set to 0, the
LRP830 will return a syntax error. A special error packet is sent if the timeout expires.
If the read range exceeds the last tag address, the LRP830 will return an
invalid format error message (error code 21H).
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes.
Command
95H
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Start Address
2-byte value for the starting tag address
Block Size
2-byte value for the length of the read in number of bytes
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH).
Tag Serial Number
8-byte tag serial number
Checksum
Optional Checksum
Terminator

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LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE:
Reads 2 bytes of data from the tag starting at address 0001H. A timeout of 2
seconds (07D0H = 2000 x 1 msec increments) is set for the completion of
the SN Block Read. If the timeout expires before reading a tag the response
packet is: 02H 02H 00 03 FF 00 Status 03H.
Response from LRP830, tag found
Command from Host
Contents
Field
Contents
Header

02H
Header

02H
Command Size
00H
Response Size
00H
Command Code
95H
Command Echo
95H
Family ID
AAH
Data from
address 0001H
05H
Data from
address 0002H
AAH
Terminator
03H
Field
02H
03H
11H
Anticollision Index
02H
Start address
00H
01H
Block size
00H
02H
02H
Timeout,
2 seconds
07H
SN byte 1
ADH
Field
Contents
SN byte 2
23H
81H
Header

02H
SN byte 3
SN byte 4
1DH
Response Size
00H
SN byte 5
C3H
SN byte 6
66H
Command Status
FFH
SN byte 7
78H
Ntag
00H
SN byte 8
21H
Status byte
08H
Terminator
03H
Terminator
03H
D0H
Response from LRP830, tag not found
02H
03H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
133
ABxF Command 96 (96H): SN Block Write
DESCRIPTION
Write a block of data to an RFID tag identified by its serial number.
DISCUSSION
The SN Block Write command is used to write segments of data to contiguous areas of tag memory. The timeout value is given in 1 msec increments
and can have a value of 1EH to FFFEH (65,534 ms). When the timeout is
set to 0, the LRP830 will return a syntax error.
The SN Block Write consists of a start address followed by the data stream
to be written to the RFID tag specified by the serial number given in the
command. If the block size exceeds the last tag address, the LRP830 will
return an invalid format error message (error code 21H).
Field
Content
Header

Command Size
Command length in bytes excluding the header, packet size, checksum and
terminator bytes.
Command
96H
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Start Address
2-byte value for the starting tag address
Block Size
2-byte value for the length of the write in number of bytes
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH).
Tag Serial Number
8-byte tag serial number
Data
Data bytes to be written
Checksum
Optional Checksum
Terminator

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LRP830-Series Long-Range Passive Reader/Writer
EXAMPLE:
Writes 4 bytes of data to the tag starting at address 0000H. A timeout of 2
seconds (07D0H = 2000 x 1 msec increments) is set for the completion of
the SN Block Write.
Command from Host
Response from LRP830
Field
Contents
Field
Contents
Header

02H
Header

02H
Command Size
00H
Response Size
00H
02H
15H
02H
03H
Command Code
96H
Command Echo
96H
Family ID
03H
Number of tags
01H
Anticollision Index
03H
Status byte
00H
Start address
00H
Terminators
03H
00H
Block Size
00H
04H
Timeout,
2 seconds
07H
SN byte 1
ADH
SN byte 2
23H
SN byte 3
81H
SN byte 4
1DH
SN byte 5
C3H
SN byte 6
66H
SN byte 7
78H
SN byte 8
21H
Data to write to
address 0000H
52H
Data to write to
address 0001H
46H
Data to write to
address 0002H
49H
Data to write to
address 0003H
44H
Terminators
03H
D0H
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
135
ABxF Command 97 (97H): SN Block Read All
DESCRIPTION
Read a block of data from all RFID tags-in-field or all those with the specified Family ID. Data will be returned with the serial number of the corresponding tag.
DISCUSSION
This command is used to read segments of data from contiguous areas of tag
memory. It is capable of handling up to 48 bytes of data transferred to the
host with one command if there is no tag family ID. The timeout value is
given in 1 msec increments and can have a value of 1EH to FFFEH (65,534
ms). When the timeout is set to 0, the LRP830 will return a syntax error.
The response to this command will contain the serial number of the responding tags preceding the data from those tags. The termination packet is transmitted when the timeout expires. Each packet will be sent to the host as soon
as it is available. The returned serial numbers can be used to read/write to
tags-in-field via the SN Block Read/Write command.
The SN Block Read All consists of a Family ID, an Anticollision Index, a
start address and length, followed by a timeout value and a message terminator as shown below. A special termination packet is sent when the
timeout expires. If the Anticollision Index is 0, a response is returned when
the operation is successfully completed on 1 tag, or when the timeout expires. A termination packet is not sent for successful completion if the
Anticollision Index is 0.
If the read length exceeds the last tag address, the LRP830 will return an
invalid format error message (error code 21H).
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LRP830-Series Long-Range Passive Reader/Writer
The command is formatted as follows.
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes.
Command
97H
Family ID
Tag Family ID - 00H = all tags
Anticollision Index
Number of tags expected
Start Address
2-byte value for the starting tag address
Block Size
2-byte value for the length of the read in number of bytes
Timeout
2-byte timeout value in 1 ms increments (1EH - FFFEH).
Checksum
Optional Checksum
Terminator

NOTE:
This command can not be used over a DeviceNet interface.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
137
EXAMPLE:
Reads 4 bytes of data from the tag starting at address 0001H. A timeout of 2
seconds (07D0H = 2000 x 1 msec increments) is set for the completion of
the SN Block Read All. The Tag Family byte is set to zero so all tags will be
read. Three tags respond with data.
Response from LRP830
Command from Host
Field
Contents
Field
Contents
Header

02H
Header/tag 1

02H
Command Size
00H
Response Size
00H
02H
02H
0DH
09H
Command Echo
97H
Command Code
97H
Family ID
03H
SN byte 1/tag 1
ADH
Anticollision Index
00H
SN byte 2/tag 1
23H
Start address
00H
SN byte 3/tag 1
81H
00H
SN byte 4/tag 1
1DH
00H
SN byte 5/tag 1
C3H
04H
SN byte 6/tag 1
66H
Timeout,
2 seconds
07H
SN byte 7/tag 1
78H
D0H
SN byte 8/tag 1
21H
Terminators
03H
Data byte 1/tag 1
52H
Data byte 2/tag 1
46H
Data byte 3/tag 1
49H
Data byte 4/tag 1
44H
Terminators
03H
Block Size
138
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Header/tag 2

02H
Response Size
02H
02H
Header/End Packet

00H
Response Size
00H
0DH
02H
03H
Command Code
97H
Command Echo
FFH
SN byte 1/tag 2
ADH
Number of tags
03H
SN byte 2/tag 2
23H
Status byte
08H
SN byte 3/tag 2
81H
Terminators
03H
SN byte 4/tag 2
1DH
SN byte 5/tag 2
C3H
SN byte 6/tag 2
66H
SN byte 7/tag 2
78H
SN byte 8/tag 2
21H
Data byte 1/ tag 2
52H
Data byte 2/tag 2
46H
Data byte 3/tag 2
49H
Data byte 4/tag 2
44H
Terminators
03H
Header/tag 3

02H
Response Size
00H
Command Code
97H
SN byte 1/tag 3
ADH
SN byte 2/ tag 3
23H
SN byte 3/tag 3
81H
SN byte 4/tag 3
1DH
SN byte 5/tag 3
C3H
SN byte 6/tag 3
66H
SN byte 7/tag 3
78H
SN byte 8/tag 3
21H
Data byte 1/ tag 3
52H
Data byte 2/tag 3
46H
Data byte 3/tag 3
49H
Data byte 4/tag 3
44H
Terminators
03H
02H
0BH
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
139
6.6
ABx ASCII
ASCII Protocol
Protocol
6.5 ABx
The ABx ASCII Protocol is based on the ABx Fast protocol. It uses the
same headers and terminator (already ASCII characters) and converts the
hex value of command and data bytes to printable ASCII (2 digit Hexadecimal notation). In another words, the hex values given in an ABx Fast command are transmitted as separate ASCII characters.
Since it is an ASCII protocol, the Xon/Xoff handshake can be used.
Command Packet Structure:
The command protocol is based on the following minimal packet structure.
The data field and the checksum may not be present depending on the command type and your checksum setting.
Field
Number of ASCII
Characters
Content
Header
(02H, 02H)
Command Size
Packet length in bytes excluding the header, Command
size, checksum and terminator bytes.
Command Code
Command
(Data)
variable
command data/parameters
Checksum
Optional Checksum
Terminator
(03H)
Following a successful operation, the LRP830 will respond with the following. The data field and the checksum may not be present depending on the
command and your checksum setting. If a checksum is enabled in the Configuration Menu, then it is always present for every command.
Field
Number of ASCII
Characters
Content
Header
(02H, 02H)
Response Size
Packet length in bytes excluding the header, response size,
checksum and terminator bytes.
Command Echo
Command
(Data)
variable
response data
Checksum
Optional Checksum
Terminator
(03H)
140
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
If the LRP830 encounters a fault it will respond with the following:
Field
Number of ASCII
Characters
Content
Header
(02H, 02H)
Response Size
Packet length in bytes excluding the header, response size,
checksum and terminator bytes.
Error Flag
FFH
Error Code
Hex error code, see Table 11 for details
Checksum
Optional checksum
Terminator
(03H)
Most RF operations will also require additional parameters and data that will
be included in the command stream between the command code or echo and
the terminator.
The Header and Terminator are always STX and ETX respectively. Any
other field value is in ASCII hex notation. Allowed values: '0'-'9', 'A'-'F'. Example: the value ABH (decimal 171) in ASCII protocol is transmitted as a
2-character string «AB», i.e. the 2 bytes: 41H 42H (ASCII values for 'A' and
'B'). The hex value of the hex digits given in ASCII are: '0'-'9' = 30H - 39H,
'A'-'F' = 41H-46H.
The sequence for each command is given with the response format in the
preceding section. Referring to the ABx Fast command you can structure the
ABx ASCII commands by using ASCII values for each digit of the hex values, excluding the header and terminator that are already ASCII characters.
Command/Response Size
The ABx ASCII requires the length of the packet be included in the command. All parameters and data between the Command Size and the terminator or checksum byte must be accounted for in the packet size word. This
includes all command codes and parameters such as field definition for
Block Read/Writes. The packet size remains the same with, or without the
checksum.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
141
Checksum
The optional checksum must be enabled from the operating mode menu to
be available. The checksum is calculated by adding all the byte values (not
the ASCII translation values) in the packet (less the values in the header,
checksum if present, and terminator), discarding byte overflow and subtracting the byte sum from FFH.
Example ASCII Command
Fill Tag
This command fills the specified number of cells from the specified start address with the specified value. Block size = 0 means filling to the end of the
memory. The command will take the same form as the ABx Fast command.
Field
Content
Header

Command Size
Packet length in bytes excluding the header, command size, checksum and
terminator bytes. Given as four ASCII character value. 0008H for this command
Command
<30H><34H> (04)
Start Address
4 ASCII character value for the starting tag address
Fill Length
4 ASCII character value for the length of the fill in number of bytes
Timeout
4 ASCII character value for timeout in 1 ms units.
Data value byte
2 ASCII character value for 1 byte of fill
Checksum
2 ASCII character value for Optional Checksum
Terminator

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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
The ASCII character string for a fill of 32 bytes, from address 0 with 55H
value, timeout 5 sec., follows.
Response from LRP830
Command from Host
Field
ASCII
Hex
Value
ASCII
String
Field
ASCII
Hex
Value
ASCII
String
Header

02H
STX
STX
STX
Header

02H
02H
02H
STX
Response Size
30H
Command Size
Command
Start Address
Fill Length
Timeout Value
Data Byte Value
Checksum
Terminators
30H
30H
30H
30H
31H
38H
30H
34H
30H
30H
30H
30H
30H
30H
32H
30H
31H
33H
38H
38H
35H
35H
45H
33H
03H
ETX
Command Echo
Checksum
Terminators
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
30H
30H
34H
46H
41H
03H
ETX
143
7 LRP830 DEVICENET INTERFACE
7.1 Introduction
The LRP830 is compatible with any DeviceNet scanner host that conforms
to DeviceNet standards and can process standard DeviceNet fragmentation
protocol as defined by the Open DeviceNet Vendor Association (ODVA) in
the ODVA DeviceNet specification (see www.odva.org for details.) You
may address DeviceNet protocol and scanner questions to "Dr. DeviceNet"
at the ODVA Web site.
An EDS (Electronic Data Sheet) configuration file is provided with the
LRP830 software for use with the Allen-Bradley DeviceNet Manager PLC
scanner configuration software or any other conforming DeviceNet scanner
host. The is EDS text file contains standard vendor specific information for
the Escort Memory Systems' LRP830 product. Please refer to the
"readme.txt" text files on the release diskette for more information.
Any command packet sent from the host and any response packet sent by
the controller back to the host is structured as an 8 byte fixed length packet.
The LRP830 supports larger message sizes using the standard DeviceNet
message fragmentation technique. When the interface board I/O produce
size and/or I/O consume size is greater than 8 bytes, fragmentation is automatically performed by the controller software.
Scan Rates
The user determines the DeviceNet poll frequency via the DeviceNet scanner host configuration program, such as A-B DeviceNet Manager software.
For example, the DeviceNet Manager program uses a default poll (scan) rate
of 10 milliseconds (version 3.004). LRP830 DeviceNet communications
may be lost if the poll rate is set above 500 milliseconds. The interscan
delay rate of the DeviceNet scanner host should not be set less than 150 ms
for the LRP830(s). If other DeviceNet nodes require a faster poll rate, use
the standard background polling option for LRP830 nodes so that the background poll rate does not exceed 150 ms.
144
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LRP830-Series Long-Range Passive Reader/Writer
COM1 LED Indicator
The COM1 LED indicates DeviceNet traffic activity. The LED does not indicate network status as defined by ODVA.
DeviceNet Interface
To use the DeviceNet interface:
1. Set DIP switch 4 on the main board to "1" (ON) to enable
DeviceNet communications.
2. Verified default settings of serial port COM2: 9600, N, 8, 1, no
flow control for configuration purposes.
7.2 Interface Board Monitor Mode
The following Section describes steps required to enter the DeviceNet Interface Board Monitor mode. From the Monitor Menu you can download updated LRP830 DeviceNet interface software, see the current configuration,
and change the DeviceNet protocol parameters.
Enter Interface Board Monitor
To enter the Interface Board Monitor follow these steps:
1. Connect LRP830 COM2 (see below) to one of your PC serial
communication ports.
LRP830
Standard PC Serial Port
COM2 Pin Number
Signal Name
DB9 Pin Number
Signal Name
TX
RX
RX
TX
GND
GND
2. Install and run EC (at 9600, N, 8, 1), to establish communication
with the LRP830. EC is a serial communications program and is
available on diskette or can be downloaded from Escort Memory
Systems’ web site, www.ems-rfid.com.
3. Power the LRP830 via the DeviceNet connector. Refer to Section
3.8 for more information on powering the LRP830.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
145
4. You must press CTRL-E within 7 seconds to enter the Interface
Board Monitor mode from a terminal emulator (EC) connected to
COM port 2 (9600, N, 8, 1). If the LRP830 does not receive
CTRL-E in the seven second period, it will automatically enter
"RUN MODE".
5. Upon entering CTRL-E, wait for the following menu to appear.
————————————————————————————
| HMS/LRP Rd/Wrt Controller with DeviceNet & Serial I/O.
| (c) 2000 Escort Memory Systems, a Datalogic Co.
————————————————————————————Commands:
I ———— Display Configuration Info
E ———— Edit Configuration Sub-menu
Z ———— Download Firmware Hex File (config defaults)
X ———— Download Firmware Hex File (retain config)
RESET ———— To enter Run Mode (exit monitor)
>x
Note: "X" is the recommended option for new firmware download by the user. No download option will
overwrite the DeviceNet serial number set at the factory (V2.0F and above). Commands are not case sensitive.
*:-D Initiate download now (do not restart prior to RESET msg.)*
CTRL-E places the main board in a special mode, that allows the Main
Board to pass communications to the interface board during Monitor Mode.
NOTE:
After Monitor Mode has been entered via CTRL-E within 7 seconds, you
must reset the device to enter Run Mode. Run Mode is entered automatically
if no control key actions are performed.
146
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
7.2.1 Downloading Firmware to the Interface Board
To download new software to the interface board, select "X" from the Monitor Menu shown above to retain existing configuration settings or "Z" if you
wish to overwrite configuration settings with factory defaults. In most cases
you will want to retain existing configuration settings and should use the X
command to download new firmware.
IMPORTANT:
It is not necessary to download firmware into the unit unless instructed to do
so by Escort Memory Systems technical support personnel.
————————————————————————————| HMS/LRP Rd/Wrt Controller with DeviceNet & Serial I/O.
(c) 2000 Escort Memory Systems, a Datalogic Co.
————————————————————————————Commands:
I ———— Display Configuration Info
E ———— Edit Configuration Sub-menu
Z ———— Download Firmware Hex File (config defaults)
X ———— Download Firmware Hex File (retain config)
RESET ———— To enter Run Mode (exit monitor)
>x
Note: "X" is the recommended option for new firmware download by the user. No download option will
overwrite the DeviceNet serial number set at the factory.
*:-D Initiate download now (do not restart prior to RESET msg.)*
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
147
7.2.2 Downloading with the EC Emulation Program
If you are using the terminal emulator "EC" provided by Escort Memory
Systems (EMS), do the following from EC to download the new software:
1. Perform ALT-F to enter the file menu.
2. Select "download" from the menu.
3. Select "ASCII" from the pop-up window.
4. Specify the path/name of the hex file provided by Escort Memory
Systems.
When the download is complete, you will be prompted to reset
the LRP830 with the following message:
<:-> RESET NOW...
5. Repower the LRP830.
7.2.3 Display Interface Board Configuration
Parameters
The following display reflects the current configuration parameters that are
stored in the unit's non-volatile flash ROM. Some of the parameters can be
modified via the Configuration Edit option "E" (see next Section).
SW1 positions 7 and 8 can be used to set the DeviceNet baud rate as follows:
00 = 125k (default)
01 = 250k
10 = 500k
Please refer to the ODVA DeviceNet Specification for additional information.
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LRP830-Series Long-Range Passive Reader/Writer
Display Configuration Info
To review the current settings enter "I" from the Monitor Menu and you will
see a display similar to the following:
—————————————————————————————————
HMS/LRP Rd/Wrt Controller with DeviceNet & Serial I/O.
(c) 2000 Escort Memory Systems, a Datalogic Co.
———————————————————————————————-——
Commands:
I ———— Display Configuration Info
E ———— Edit Configuration Sub-menu
Z ———— Download Firmware Hex File (config defaults)
X ———— Download Firmware Hex File (retain config)
RESET ——— To enter Run Mode (exit monitor)
> I (case insensitive)
The following display contains the default (factory) recommended configuration:
LRP830 Firmware Version V2.0F DeviceNet Serial # 04 99 00 0A (hex).
<============= LRP830 INTERFACE-BOARD CONFIGURATION DATA =============>
I/O produce size: 34
I/O consume size: 34
Device Type: HDR
DevNet Protocol: POLL
ABx separation: Y
Buf Flush Enable: N
Buf Flush Delay: 200
DNet Rev: 002.000
MAC_ID: 10
Vendor ID: 78
Product Code: 830
Product Type: 12
========================================================================
Edit Configuration Menu (y/n)?> y
If your requirements necessitate changing the configuration, enter "Y" at the
above prompt. The configuration editor will appear as described in the following section.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
149
7.2.4 Interface Board Configuration Editor
Note: the following menu can be attained via "Y" (above) or selecting "E"
from the Monitor Menu (above). These are the recommended parameters,
however, it is likely that A and/or B (below) may require modification according to customer requirements.
<= LRP830 INTERFACE-BOARD CONFIGURATION MENU =>
Enter Parameter # to Change:
===== Std DeviceNet =====
90 A. 830 Tx Msg Size (0-254)
90 B. 830 Rx Msg Size (0-254)
0 C. DevNet Protocol (Poll=0,Strobe=1)
D. DeviceNet Serial# 04 99 12 34 (hex)
===== LRP830 Specific =====
2 1. Device Type (GENeric: 0=norm, 1=rev; HDR: 2=n, 3=r)
Y 2. ABx separation (Y/N)
N 3. Buf Flush Enable (Y/N)
200 4. Buf Flush Delay (0-9999)
SELECTION 1-C? (Ctrl-C Exits)
When you wish to exit the interface board configuration menu, enter
"CTRL-C." The following prompt will appear which is responded with "n"
in this example.
Update Flash ROM (y/n)?> n [:-( Flash ROM *Not* Updated )-:]
{-:) Please Reset LRP830 to enter RUN mode (:-}
{HALTED}

The LRP830 must now be reset or power cycled to enable the unit to enter
"RUN" mode.
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LRP830-Series Long-Range Passive Reader/Writer
7.2.5 Edit Configuration Command.
To change the LRP830 configuration parameters, enter the "E" command
from the Monitor Menu. The Interface Board will display the current values
for user-configureable variables. In the following configuration menu, range
checking and validation is performed on every input provided by the user.
The current value of the item is displayed with each prompt for change.
ESC exits to a previous level. The backspace key is supported. CTRL-C exits the Configuration Menu and prompts you to store the changes into flash
(non-volatile) memory.
————————————-—————————————————————
HMS/LRP Rd/Wrt Controller with DeviceNet & Serial I/O.
(c) 2000 Escort Memory Systems, a Datalogic Co.
————————————-—————————————————————
Commands:
I ———— Display Configuration Info
E ———— Edit Configuration Sub-menu
Z ———— Download Firmware Hex File (config defaults)
X ———— Download Firmware Hex File (retain config)
RESET ———— To enter Run Mode (exit monitor)
>e
Note: the following display reflects the current status of user configureable
parameters. The display will refresh automatically after you enter a new
value.
Enter the number or letter corresponding to the variable you wish to change
followed by the new value. After you have entered and visually verified all
of your modifications, enter and select "Y" to save your
changes to the LRP830's flash memory.
LRP830 Firmware Version V2.0F DeviceNet Serial # 04 99 00 0A (hex).
<= LRP830 INTERFACE-BOARD CONFIGURATION MENU =>
Enter Parameter # to Change:
===== Std DeviceNet =====
90 A. 830 Tx Msg Size (0-254)
90 B. 830 Rx Msg Size (0-254)
0 C. DevNet Protocol (Poll=0,Strobe=1)
D. DeviceNet Serial# 04 99 12 34 (hex)
===== LRP830 Specific =====
2 1. Device Type (GENeric: 0=norm, 1=rev; HDR: 2=n, 3=r)
Y 2. ABx separation (Y/N)
N 3. Buf Flush Enable (Y/N)
200 4. Buf Flush Delay (0-9999)
SELECTION 1-C? (Ctrl-C Exits)
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151
Example
The following example shows how the Tx and Rx message sizes are modified from 90 to 48 bytes in length.
SELECTION 1-C? (Ctrl-C Exits) a
90 A. 830 Tx Msg Size (0-254). ?>48
Enter Parameter # to Change:
===== Std DeviceNet =====
48 A. 830 Tx Msg Size (0-254)
90 B. 830 Rx Msg Size (0-254)
0 C. DevNet Protocol (Poll=0,Strobe=1)
D. DeviceNet Serial# 04 99 12 34 (hex)
===== LRP830 Specific =====
2 1. Device Type (GENeric: 0=norm, 1=rev; HDR: 2=n, 3=r)
Y 2. ABx separation (Y/N)
N 3. Buf Flush Enable (Y/N)
200 4. Buf Flush Delay (0-9999)
SELECTION 1-C? (Ctrl-C Exits) b
90 B. 830 Rx Msg Size (0-254). ?>48
Enter Parameter # to Change:
===== Std DeviceNet =====
48 A. 830 Tx Msg Size (0-254)
48 B. 830 Rx Msg Size (0-254)
0 C. DevNet Protocol (Poll=0,Strobe=1)
D. DeviceNet Serial# 04 99 12 34 (hex)
===== LRP830 Specific =====
2 1. Device Type (GENeric: 0=norm, 1=rev; HDR: 2=n, 3=r)
Y 2. ABx separation (Y/N)
N 3. Buf Flush Enable (Y/N)
200 4. Buf Flush Delay (0-9999)
SELECTION 1-C? (Ctrl-C Exits) "CTRL-C" entered by user
Update Flash ROM (y/n)?> y
{:->! Flash ROM Updated !<-:}
{-:) Please Reset LRP830 to enter RUN mode (:-}
{HALTED}

When reset is requested via a monitor mode function, you must reset the
LRP830 and let the seven second period elapse without entering anything
from the keyboard to enter Run Mode.
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7.2.6 Configuration Parameter Validation
<= LRP830 INTERFACE-BOARD CONFIGURATION MENU =>
Enter Parameter # to Change:
===== Std DeviceNet =====
90 A. 830 Tx Msg Size (0-254)
90 B. 830 Rx Msg Size (0-254)
0 C. DevNet Protocol (Poll=0,Strobe=1)
D. DeviceNet Serial# 04 99 12 34 (hex)
===== LRP830 Specific =====
2 1. Device Type (GENeric: 0=norm, 1=rev; HDR: 2=n, 3=r)
Y 2. ABx separation (Y/N)
N 3. Buf Flush Enable (Y/N)
200 4. Buf Flush Delay (0-9999)
SELECTION 1-C? (Ctrl-C Exits)
Begin by selecting the letter or number associated with the parameter to be
changed. After entry of the desired option, a prompt will appear with an
allowable limits range. Enter the desired value after the modification prompt
appears.
For example:
Selection (CTRL-C to exit) ...a
If an invalid value is entered, the monitor displays an error message and
re-prompts for a valid entry.
For example; if an invalid value is entered for LRP830 Transmit Message
Size (i.e., I/O produce size), the monitor responds with a limits prompt.
34 A. 830 Tx Msg Size (0-254). ?>487
34 **Must be 0-253 A. 830 Tx Msg Size (0-254). ?>48
The leftmost column contains the current parameter setting. Upon entering a
valid parameter the monitor will return to the Configuration Menu where the
value will be updated in the list of options.
Parameters are separated into two categories: Standard DeviceNet and
LRP830 Specific. Following is an explanation of each parameter setting.
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153
7.2.7 Standard DeviceNet Parameters
Produce and Consume Sizes
Before setting the first two parameters (TxMsgSize and RxMsgSize) you
should calculate the optimum consume and produce sizes. The default size is
90 for both TxMsg and RxMsg.
The default setting will create a byte offset for the command code byte when
using ABx Fast and a word oriented PLC.
ABx Standard has a different header then the ABx Fast protocol and if a
HDR (header protocol) has been selected, then you must add 2 handshake
bytes into the calculation.
NOTE:
For the sake of clarity, the DeviceNet Header in HDR mode is referred to as
the handshake word in the following documentation.
Commands in the ABx Non-separated mode permit more data in the responses because of the packed nature of the return data in this mode. Please
refer to Section 7.2.8 for more information on the ABx Non-Separated
Mode.
Following are examples of how to calculate sizes for the various command
protocols. Refer to Section 7.2.9 for more information on protocols and Section 7.2.8 for information on the non-separated mode.
Produce size — ABx Standard, 8 Byte Read
Generic
Description
HDR
# of bytes Description
ABX Non-separated
# of bytes Description
# of bytes
Protocol Header,
AA 05
Handshake word
Handshake word
Terminator, FF FF
Protocol Header,
AA 05
Command Echo
Number of read bytes
(2x)
16
Terminator FF FF
Number of read bytes
Number of read
bytes (2x)
16
Total bytes
22
Total bytes
11
Total bytes
154
20
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Produce size — ABx Fast, 8 Byte Read
Generic
Description
HDR
# of bytes Description
ABX Non-separated
# of bytes Description
# of bytes
Protocol Header,
STX STX
Handshake word
Handshake word
Terminator, 03
Protocol Header,
STX STX
Command Echo
Response Size
Terminator 03
Number of read bytes
Command Echo
Response Size
Optional Checksum
Number of read bytes
Command Echo
Optional Checksum
Number of read
bytes
Optional Checksum
Total bytes
15
Total bytes
17
Total bytes
12
Without Checksum
14
Without Checksum
16
Without Checksum
11
Consume size — ABx Standard, 8 Byte Read
Generic
Description
HDR
# of bytes Description
ABX Non-separated
# of bytes Description
# of bytes
Protocol Header,
AA 05
Protocol Header,
AA 05
Protocol Header,
AA 05
Terminator, FF FF
Terminator FF FF
Terminator FF FF
Start Address
Start Address
Start Address
Length
Length
Length
Timeout
Timeout
Timeout
Handshake word
Handshake word
Total bytes
12
Total bytes
12
Total bytes
10
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155
Consume size — ABx Fast, 8 Byte Read
Generic
Description
HDR
# of bytes Description
ABX Non-separated
# of bytes Description
# of bytes
Protocol Header,
STX STX
Handshake word
Handshake word
Terminator, 03
Protocol Header,
STX STX
Command Echo
Command Size
Terminator 03
Terminator 03
Command
Command Size
Command Size
Start Address
Command
Command
Length
Start Address
Start Address
Timeout
Length
Length
Optional Checksum
Timeout
Timeout
Optional Checksum
Total bytes
13
Total bytes
15
Total bytes
15
Without Checksum
12
Without Checksum
14
Without Checksum
14
Optional Checksum
Write Commands
For write commands you must add the write data to the consume size. Add 2
bytes for each byte of data to write if you are using ABx Standard and 1 byte
each if you are using ABx Fast commands.
Also note that there is no length field for Non-contiguous write commands.
LRP830 Transmit Message Size
90
A. 830 Tx Msg Size (0-254)
Size of the DeviceNet poll message response from the LRP830 to the
DeviceNet Scanner Host. The default is 90.
When "A" is entered from the Configuration Edit menu, the monitor
prompts for the LRP830 Transmit Message Size (i.e., DeviceNet I/O produce size, 0-254)
Selection (CTRL-C to exit) ...a
90 A. 830 Tx Msg Size (0-254). ?>30
Important
Determine the field size in commands and responses before programming
this value. Field sizes are protocol dependent.
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LRP830-Series Long-Range Passive Reader/Writer
LRP830 Receive Message Size
90
B. 830 Rx Msg Size (0-254)
Size of the DeviceNet poll message command to the LRP830 from the
DeviceNet Scanner Host.
When "B" is entered from the Configuration Edit menu, the monitor
prompts for the LRP830 Transmit Message Size (i.e., DeviceNet I/O consume size).
Selection (CTRL-C to exit) ...b
48 B. 830 Rx Msg Size (0-254) ). ?>30
Important
Determine the field size in commands and responses before programming
this value. Field sizes are protocol dependent.
Protocol: Poll or Strobe
C. DevNet Protocol (Poll=0,Strobe=1)
When "C" is entered from the Configuration Edit menu, the monitor
prompts for DeviceNet Poll or Strobe protocol. Poll is the default selections.
Please refer to the current ODVA DeviceNet Specification for more information.
Selection (CTRL-C to exit) ...C
0 C. DevNet Protocol (Poll=0,Strobe=1): ?>>0
DeviceNet Serial Number
D. DeviceNet Serial# 04 99 12 34 (hex)
Each slave node on a DeviceNet bus must have a unique serial number.
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157
7.2.8 LRP830 Specific Parameters
Device Type
2 1. Device Type (GENeric: 0=norm, 1=rev; HDR: 2=n, 3=r)
Device Type specifies whether a handshaking protocol should be used
between the DeviceNet Scanner Host and the LRP830.
Generic indicates no handshaking protocol (due to asynchronous communication). Messages and responses are repeated in each poll, until the
DeviceNet Scanner Host or LRP830 clears its output buffer.
HDR (header) indicates a handshaking protocol is used for communication
between the DeviceNet Scanner Host and the LRP830. This protocol is further described in Section 7.2.9. HDR type requires a one-word (two-byte)
header at the beginning of every poll and response message.
ABx separation
3. ABx separation:
If "Y" is specified, each ABx command response from the LRP830 is separated into it's own DeviceNet message. This assures timely response processing.
ABx Non-separation
When "N" is selected, data compression will occur as packed data inside the
response.
Selection (CTRL-C to exit) ...2
2. ABx separation. ?>n
The ABx non-separated mode reduces the size of the response fields by
removing command/response header bytes (AA and STX STX) and terminator (FFFF and 0x03) bytes as well as the null MSB byte found in the data
sections of ABx Standard commands. This reduces DeviceNet traffic and
increases data throughput.
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Because ABx Non-separation removes the termination bytes that indicate
the end of the message, the programmer must remember how many bytes
the command asked for. In the ABx Fast response there is always a
checksum byte included in the data array (00H if checksum option is disabled).
The ABx Non-separated selection works across all device types (generic &
polled) types.
A handshake word (2 bytes) is required in the beginning of the command
and response of every single device type (generic and polled). The polled
mode uses this word as a handshake field regardless of the ABx separation
mode chosen and must be considered when calculating the size of the messages. In essence ABx non-separated always adds 2 bytes (1 word) to the
start of both command (produced) and response (consume) fields.
The HMS830 ABx Non-separated command OK responses are protocol
independent of protocol in fact they are the same with the exception of the
optional checksum byte within ABx Fast.
Polled Commands in ABx Non-separation Mode
In Polled mode, the PLC first Word lower byte raises a single REQ bit to
send the message.
For example, this would cause AA050000000607D0FFFF (a read command
ABx standard style) to be executed. Generic now has the first Word (word
zero) in the command as a header. This means that both types, polled and
generic, have the same response format.
ABx Fast protocol commands will also have a handshake word as the
header. If no header is desired then do not use the ABx Non-separated mode.
Error Management
ABx Non-separated polled response is the same as the standard response
with regards to the first Word. The single exception here is the handshake
byte has the most significant bit being set to 1 indicating that the command
had an error response. This ERROR bit in the response saves the program
from parsing the message to see if the retry is necessary to read a tag. When
a response is not an error response this bit is left to 0.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
159
To clear the error bit simply execute a new command. This same bit is used
inside the generic mode. All error response codes are the same exact error
responses that are given from ABx separated mode. No change in the protocol header or terminator has been made with error responses. Calculations
must accommodate the fact that an error could occur, especially if only one
byte is being read.
All error responses will have a single word still as part of the header. The response high byte turns into a counter that wraps at 256. The counter counts
one count on every new response whether or not it is an error. Power up resets the counter to zero. The counter helps to distinguish between identical
reads and reduces the need for having a unique pallet ID located inside the
message response. The counter used in generic mode helps reduce identical
multiple reads and or writes due to the many repeats of commands that
DeviceNet scanner sends.
A good message response now has a packed array of data meaning that both
high and low bytes of each PLC Word has valid data bytes as part of the
response. The response begins with the header word followed by the command echo byte and then every succeeding byte following will be a byte of
data that has been requested from the tag.
Trigger Feature
Generic reversed ABx Non-separated can set up a trigger that allows user to
have better control of messages that reach the antenna. The use of the trigger
limits command requests from being sent unnecessarily to the antenna before it is time. With the trigger feature, it is not possible to flood the antenna
with commands. Typically, a read command is triggered with this feature.
After correct configuration settings have been made, the user must provide a
byte that counts up whenever a new command sent to the antenna. Every
time a response count comes in, it is copied into the trigger byte to trigger
that command thus eliminating the need for a PLC count variable. The counter byte must be incremented by 1 to trigger the next command. The counter
can also be set to alternate between 0 and 1, however a rolling counter can
track the number of commands. When the counter byte is 0, no command
will be triggered.
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When the PLC sends the header word with a new number in PLC Word 0
(low byte) will a command be performed. The actual command given in an
array must be valid regardless of the protocol (ABx S/ABx F).
Generic repeats a command many times faster than the reader can keep up
with responses due to the fact that a read request requires more time than the
DeviceNet scan rate. See Section 7.2.9 for more information on Generic protocol.
Command acceptance has a higher order of precedence than the trigger
meaning that an invalid command cannot be triggered.
Buf Flush Enable
4. Buf Flush Enable (Y/N)
This option applies to Generic Device Type protocol only, as defined in
Section 7.2.9.
When you have entered 4 from the Configuration Menu, you will be
prompted whether you wish to enable Buffer Flush.
If yes, the LRP830's produce buffer (output to DeviceNet Scanner Host) is
cleared at the interval defined in "Buffer Flush Delay."
If no, then the produce buffer is not cleared by the LRP830.
Selection (CTRL-C to exit) ...4
4. Buf Flush Enable (Y/N): N. ?>
Buf Flush Delay
200 5. Buf Flush Delay (0-9999)
Delay value between buffer flushes. The POLL or STROBE output buffer is
cleared at the specified interval when the Buffer Flush Enable parameter is
set to Y. Valid values are 8 - 9999 milliseconds.
Selection (CTRL-C to exit) ...5
5. Buf Flush Delay (8-9999) .2000 ?>4500
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LRP830-Series Long-Range Passive Reader/Writer
161
7.2.9 Device Type Protocols.
There are two protocols that can be used to transport the ABx RF-ID
antenna commands: Generic Device Type and Header Device Type. The
Generic Device Type does not contain an extra header for handshaking, and
is strictly asynchronous. The DeviceNet Scanner Host repeats a command
at each poll until a response is received. The LRP830 repeats each poll
response until the LRP830 provides a new command response (or buffer
flush occurs, when enabled).
The Header Device Type includes a one-word header at the beginning of
each DeviceNet message. Therefore, if the Tx or Rx message size was 30, 2
bytes are used for header overhead. This leaves 28 bytes available for user
commands and data.
Generic Device Type Protocol
Generic protocol is asynchronous, so the control program running in the
DeviceNet Scanner Host (e.g., Allen Bradley SLC500 PLC with DeviceNet
scanner module ladder logic) is not aware of exactly when a new message
has been received from the LRP830 (e.g., using POLL protocol). Therefore,
the DeviceNet Scanner Host must monitor every poll response message to
detect changes in the received data and to ignore duplicate responses. For
this reason, Generic is recommended as an option only for ease of initial
installation and check-out testing.
In summary, for Generic protocol, each ABx command response is sent
repeatedly by the LRP830 until:
1. A new command response is received from the antenna controller.
OR
2. A buffer flush occurs (sets buffer to zero) - parameter configureable.
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Header Device Type Protocol
When "HDR" device type is selected in the LRP830 configuration, the following features are available. A special message header is required, which
precedes each ABx command and response. The HDR device type should
always be the choice for operational (i.e., non-test) use.
The DeviceNet Scanner Host must process every message header word
coming from the LRP830. It must also correctly setup a handshake header
for every message going out to the LRP830. An entire word (2 bytes) is required for the header because some ABx command protocols require antenna data to begin and end on an even word boundary (e.g. ABx Standard).
Both the REQ and the ACK bits can be set when the LRP830 is both
acknowledging a command from the DeviceNet scanner host and indicating
it has a new ABx command response in the same poll message.
Note:
Appendix E details how to use the handshaking bits where REQ represents
the REQuest (new data present) flag and ACK represents the ACKnowledge
(REQ acknowledged) flag. The length of the header is one word and should
appear at the beginning of each incoming and outgoing message. When you
initially configure your message sizes you will have 2 bytes overhead. In essence, for a 30 byte message, you will have 2 bytes of non-data overhead in
each DeviceNet message.
A configuration option called ABx separation, instructs the LRP830 to place
only one ABx command message response in each DeviceNet message.
The default is set to ABx_sep = Y.
Protocol Processing Specifics
An additional ABx command response will only be placed in the same
DeviceNet poll response message as another response, if it fits completely in
the message. Otherwise it will be placed in a subsequent poll response message.
The HDR protocol streamlines antenna command processing by requiring
that the DeviceNet scanner host repeat each ABx poll command (intended
for processing at that moment) only until the acknowledgment bit is set by
the LRP830. This is typically accomplished by the next poll response message. The LRP830 in HDR mode will only process commands which have
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
163
the REQ bit set on in the header. In this manner, the LRP830 DeviceNet
board only forwards intended commands to the antenna for processing.
Generic protocol repeats the same command over and over again until the
scanner clears the poll message buffer or places a new command in the
buffer. As a result the antenna receives many unintended commands and not
every command can be processed. This is because typical DeviceNet scan
rates are much faster than the time it takes for the antenna to process a read
or write command. Section 6.2 specifies a timeout value of 2 seconds for the
Block Read 0x05 command example. When using a command timeout
value of 2 seconds, the antenna could only process 1 out of 20 block read
commands with a scan rate of 100ms (with REQ on).
The antenna only processes one command at a time, but it is the nature of
the DeviceNet poll protocol to repeat messages at regular intervals. So with
the GENERIC protocol, the antenna cannot process every command contained in every poll message, therefore most commands are ignored. If the
scanner were to only send each command out once, there is a good possibility of lost commands. This is especially true with A-B PLC's where the interface between the SLC/5 CPU module and 1747-SDN module, for
example, is asynchronous. Generic protocol, due to ease of setup, is intended mainly for initial interface setup and test purposes.
164
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LRP830-Series Long-Range Passive Reader/Writer
A SPECIFICATIONS
Table 8 — LRP830 Specifications
Electrical
Supply Voltage
Power Consumption
18-30 Vdc
31W (1.3 A @ 24Vdc)
Communication
RFID Interface
Bus Interface
COM1
COM2
Inputs
Output
LRP-Series Passive RFID System
DeviceNet
RS232/RS422/DeviceNet
RS232
Four industrial-level inputs, 4.5-30 Vdc (25mA max)
Four industrial-level outputs, 30 Vdc (500 mA max)
Mechanical Specifications
Dimensions (L x W x H)
Weight
Enclosure
Environmental
Operating Temperature
Storage Temperature
Humidity
Shock Resistance
Vibration Resistance
Protection Class
8.66 x 4.72 x 3.83 inches
(220 x 120 x 97 cm)
3.5 lb. (1.59 kg)
Cast Aluminum Alloy
-4 to 120 degrees F
(-20 to 49 degrees C)
-40 to 185 degrees F
(-40 to 85 degrees C)
95% non-condensing
IEC 68-2-27 test EA 30g;
11 msec; 3 shocks each axis
IEC 68-2-6 test FC 1.5 mm;
10 to 55 Hz; 2 hours each axis
NEMA 4 (IP66)
NOTE: Specifications are subject to change without notice.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
165
B MODELS AND ACCESSORIES
Table 9 — Models and Accessories
Available Models
Part Number
Description
LRP830-10
Long range, passive controller, RS232, RS422 and DeviceNet/RS485 communications, 4 digital inputs and 4 digital outputs, tunnel antenna
LRP830-04
Long range, passive controller, RS232, RS422 and DeviceNet/RS485 communications, 4 digital inputs and 4 digital outputs, conveyor-mount antenna
LRP830-08
Long range, passive controller, RS232, RS422 and DeviceNet/RS485 communications, 4 digital inputs and 4 digital outputs, plate antenna, 12 x 14"
Accessories
Part Number
Description
00-1122
Connector Kit, all five mating connectors for wiring the LRP830
46-1268
Mating Connector, DeviceNet connector, 8 pin metal circular
46-1270
Mating Connector, Power connector, 3 socket metal circular
46-1456
Mating Connector, COM1/COM2 connector, 14 pin metal circular
46-1458
Mating Connector, Input connector, 12 socket metal circular
46-1460
Mating Connector, Output connector, 12 pin metal circular
46-5119
Connector covers, shell size 12, fits DeviceNet and COM1/COM2 connectors
46-5120
Connector covers, shell size 14, fits Input and Output connectors
LRP125
Long range passive read/write tag, 25 mm round, 48 bytes memory
LRP125HT
Long range passive read/write tag, 25 mm round, survives 200° temperatures,
48 bytes memory
LRP250
Passive read/write tag, 50 mm square, 48 bytes memory
LRP250HT
Passive read/write tag, 50 mm square, survives 200° temperatures, 48 bytes
memory
LRP250HT-FLX
Passive read/write tag, 50 mm square, survives 200° temperatures, flexible
with high temperature adhesive backing, 48 bytes memory
LRP-L5555
Passive read/write tag, 55 mm square, thermal transfer with adhesive backing,
48 bytes memory
LRP-L2666
Passive read/write tag, 26 x 66 mm, thermal transfer with adhesive backing, 48
bytes memory
LRP-L4982
Passive read/write tag, 49 x 82 mm, thermal transfer with adhesive backing, 48
bytes memory
LRP-L90140
Passive read/write tag, 90 x 140 mm, thermal transfer with adhesive backing,
48 bytes memory
166
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Table 9 — Models and Accessories (cont)
Accessories
Part Number
Description
LRP-P125
Passive read/write tag, 25 mm round, PCB, 48 bytes memory
LRP-P3858
Passive read/write tag, 38 mm x 58 mm, PCB, 48 bytes memory
LRP-P5050
Passive read/write tag, 50 mm x 50 mm, PCB, 48 bytes memory
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
167
C ASCII CHART
Decimal
Hex
Character
Decimal
Hex
Character
000
00
NUL
032
20
(space)
001
01
SOH
033
21
002
02
STX
034
22
''
003
03
ETX
035
23
004
04
EOT
036
24
005
05
ENQ
037
25
006
06
ACK
038
26
007
07
BEL
039
27
008
08
BS
040
28
009
09
HT
041
29
010
0A
LF
042
2A
011
0B
VT
043
2B
++
012
0C
FF
044
2C
013
0D
CR
045
2D
014
0E
SO
046
2E
015
0F
SI
047
2F
016
10
DLE
048
30
017
11
DC1
049
31
018
12
DC2
050
32
019
13
DC3
051
33
020
14
DC4
052
34
021
15
NAK
053
35
022
16
SYN
054
36
023
17
ETB
055
37
024
18
CAN
056
38
025
19
EM
057
39
026
1A
SUB
058
3A
027
1B
ESC
059
3B
028
1C
FS
060
3C
029
1D
GS
061
3D
030
1E
RS
062
3E
031
1F
US
063
3F
168
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Decimal
Hex
Character
Decimal
Hex
Character
064
40
096
60
065
41
097
61
066
42
098
62
067
43
099
63
068
44
100
64
069
45
101
65
070
46
102
66
071
47
103
67
072
48
104
68
073
49
105
69
074
4A
106
6A
075
4B
107
6B
076
4C
108
6C
077
4D
109
6D
078
4E
110
6E
079
4F
111
6F
080
50
112
70
081
51
113
71
082
52
114
72
083
53
115
73
084
54
116
74
085
55
117
75
086
56
118
76
087
57
119
77
088
58
120
78
089
59
121
79
090
5A
122
7A
091
5B
123
7B
092
5C
124
7C
093
5D
125
7D
094
5E
^^
126
7E
095
5F
—
127
7F
DEL
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
169
D LRP830 DEMONSTRATION
This appendix describes how to setup an LRP830 demonstration using an
SS Technologies® DeviceNet scanner card connected to an LRP830 via a
DeviceNet CAN bus. The following link describes available SST
DeviceNet scanner products (e.g. PCMIA scanner card):
http://www.sstech.on.ca/sales/cards/dn/dnpcm.htm
Note: Cutler/Hammer® DeviceNet scanners use SST similar hard-ware,
however, Netsolver® DNS software is typically used with Cutler Hammer
scanners. It may be possible to run this SST software demo with the Cutler
Hammer hardware.
The recommended demo utility (due to ease of setup) is called the SST
DeviceNet scanner demo (DNSW16.exe or DNSW32.exe) and can be
downloaded from the following web page:
http://www.sstech.on.ca/tech/produp/cards/dn/content.htm
SST Scanner demo software is included on the SST installation CD.
Before You Begin
Power up the LRP830 and allow it to go into RUN mode. Execute the
DNSWnn.exe application program.
For this demo we will use a DeviceNet node address of 8 for the LRP830.
Set your LRP830 DeviceNet interface board (top board) S1 DIP switches as
follows (where 0=off and 1=on):
00100000
12345678
This demo assumes a DeviceNet bus baud rate of 125K.
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LRP830-Series Long-Range Passive Reader/Writer
Using DNSW32 or DNSW16
The name of the recommended program is DNSW16.exe or DNSW32.exe
depending upon whether you have installed the 16-bit or 32-bit version. The
typical SST installation placed the program in the following PC path (for example):
"C:\Program Files\SST\DeviceNet\dnscan\Dnsw32.exe"
You may execute the program by entering the path given above in Window's
"Run" dialog box.
After installation, you can also find it from Windows 95/98/NT as shown in
the following illustration.
Figure 30 — Initial Window of DNSW32
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
171
At the Interface Setup window (not shown) just use the defaults by pressing
OK.
Figure 31 — Opening the LRP830 Configuration File
Next, load the configuration file ( 830net.SCL), using the FILE>OPEN pull
down menu as depicted in Figure 31 and 32. This file can be found on the
LRP830 installation disk.
Figure 32 — File Open Menu
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Select Scanner from the Setup menu. Setup the node 8 scan list for the scanner interface as shown in Figure 33.
Figure 33 — Node 8 LRP830 Configuration Setup
Note: To insure dynamic update capability in the Device I/O Data window, it
is recommended that you configure the SST scanner and LRP830 for 16
byte messages instead of the 32 shown in the examples.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
173
Prepare to go online as depicted in Figure 34.
Figure 34 — Going Online
Select the "Advanced" button from the pop-up window which takes you to
Figure 35.
Figure 35 — Advance Setup Dialog Box
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Figure 36 shows how to display the Device I/O data window.
Figure 36 — Entering the Device I/O Data Window
Start scanning now by clicking the PLAY icon, which looks like a black
right triangle on the button bar.
Figure 37 — Device I/O Data Window
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
175
Now you are ready to issue commands from the scanner demo program as
shown in the Figure 32. Message offsets are shown as 00-15 as the demo
only allows 16 characters to be entered. If you need to enter more than 16,
DNSWxx.exe is a MS Visual Basic program (source included by SST)
which you can modify any way you wish.
Figure 37 shows how to enter an ABx Fast block read command (no
checksum) which is output from the scanner to the antenna. The command
format is defined in Section 6.4.
Responses from the antenna dynamically appear in the IN row as shown in
Figure 37.
You may modify the command parameters from the OUT row window. Try
changing the tag read offset and watch the tag read command response data
change as the antenna provides the updated tag data.
The Interface Status Window can be displayed as shown in Figure 38 and
39. This dynamic display is valuable in providing CAN bus status information for troubleshooting purposes.
Figure 38 — Entering the Interface Status Window
176
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Figure 39 — Interface Status/LRP830 Responses
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
177
E DEVICENET PROTOCOL EXAMPLES
For the HDR Device Type, when the DeviceNet Scanner Host has data
available to send to the LRP830, it must set the "REQ" bit in the DeviceNet
message header. If the message length is 30 bytes, then the message is fragmented and structured as follows from the master scanner. The header byte
is underlined and italicized. DeviceNet Polled protocol is used.
Examples
The following are actual DeviceNet bus message captures by
SS-Technologies DeviceNet Analyzer® software. The first four examples are
based on a 30-byte message length and the last on a 28-byte message length.
Generic: GEN (config display notation)
Command to LRP830: Standard ABx Block Write
This example is from the explanation of ABxS Command 5 found in Section 6.3. It will write 4 bytes of
data to the a starting at address 0064H. A timeout of 2 seconds (07D0H = 2000 x 1 ms) is set for the completion of the Block Write.
MCID/MSGID
Lgth
Frg
User Data
<63>2:05 [5FD]
08
00
AA
<63>2:05 [5FD]
08
41
D0
<63>2:05 [5FD]
08
42
00
<63>2:05 [5FD]
08
43
00
00
<63>2:05 [5FD]
03
84
00
00
06
00
64
00
04
07
00
52
00
46
00
49
44
FF
FF
00
00
00
00
00
00
00
00
Command Response: Standard ABx Block Write
The LRP830 will respond with a command acknowledgment as shown below, or an error message.
MCID/MSGID
Lgth
Frg
User Data
<63>1:15 [3FF]
08
00
AA
06
FF
FF
00
00
00
<63>1:15 [3FF]
08
41
00
00
00
00
00
00
00
<63>1:15 [3FF]
08
42
00
00
00
00
00
00
00
<63>1:15 [3FF]
08
43
00
00
00
00
00
00
00
<63>1:15 [3FF]
00
84
00
00
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Header Device Type Protocol
When selecting the “Header” device type in the LRP830 configuration, the
following features are available. A special message header is required,
which precedes each ABx command and response.
The Allen Bradley® SLC500 PLC with DeviceNet scanner module
(1747-SDN) must process every message header word coming from the
LRP830. It must also correctly setup a handshake header for every message
going out to the LRP830. An entire word (2 bytes) is required for the header
because some ABx Device Type messages must begin and end on an even
word boundary (e.g. ABx Standard).
Header Format
First word of message from PLC (e.g. in file N10:1) is in the following format.
Upper Header Byte
NOT USED
Lower Header Byte
ACK REQ SEN
Reserved
Bit 2 is the acknowledge flag, Bit 1 the request flag, and bit 0 is for a sensor
and is not used by the LRP830.
The possible hex values for the upper header byte are shown below:
Header Word - Binary
Header Word - Hex
Description
00000001
01 00
Sensor - Not Used
00000010
02 00
REQ - Request
00000100
04 00
ACK - Acknowledge
00000110
06 00
REQ and ACK
Both the REQ and the ACK bits can be set simultaneously when the
LRP830 is both acknowledging a command from the DeviceNet Scanner
Host and indicating it has a response to a previous command.
Note:
When "unmodified" byte ordering is opted, the PLC (for example) reverses
the bytes in each word, so an LRP830 ACK response will appear as 00 06.
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
179
The length of the header is one word and should appear at the beginning of
each incoming and outgoing message. When you setup your message sizes
you will have 2 bytes overhead. In essence, for a 28 byte message, you will
have 2 bytes of non-data overhead in each DeviceNet message. The
DeviceNet message will be fragmented into four, 8 byte fragments. The first
byte of every fragment is reserved for the fragment header byte. The fragment header byte count is not included in the total message size.
A configuration option called ABx separation, instructs the LRP830 to
place only one ABx command message response in each DeviceNet message. The default is set to ABx_sep = on.
Examples
When the PLC has data available to send to the LRP830, it sets the “REQ”
bit in the DeviceNet message header. If the message length is 30 bytes, then
the message is fragmented and structured as follows from the PLC. The
header byte is underlined and italicized.
Note:
The fragmentation byte appears in every fragment, but the header word
appears only in the first fragment. The SENSOR bit (0) may be consistently
on but should be ignored.
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LRP830-Series Long-Range Passive Reader/Writer
Header: HDR (config display notation)
Command to LRP830: Standard ABx Block Read
This is from the explanation of ABxS Command 5 found in Section 6.3, pages 39 and 40. It reads 8
bytes of data from the tag starting at address 0101H. A timeout of 2 seconds (07D0H = 2000 x 1 ms) is
set for the completion of the Block Read. The REQ bit is set in the header word as shown in the first row
below.
MCID/MSGID
Lgth
Frg
.Hdr.
<63>2:05 [5FD]
08
00
02
User Data
<63>2:05 [5FD]
08
41
08
07
D0
<63>2:05 [5FD]
08
42
00
00
00
<63>2:05 [5FD]
08
43
00
00
00
00
<63>2:05 [5FD]
03
84
00
00
00
AA
05
01
01
00
FF
FF
00
00
00
00
00
00
00
00
00
Command Response: Standard ABx Block Read
The LRP830 will send a response containing the bytes read as requested by the above command. In this
example, both the ACK and the REQ bit are set in the header word as shown in the first row below.
MCID/MSGID
Lgth
Frg
.Hdr.
User Data
<63>1:15 [3FF]
08
00
06
00
AA
05
00
52
00
<63>1:15 [3FF]
08
41
46
00
49
00
44
00
20
<63>1:15 [3FF]
08
42
00
54
00
61
00
67
FF
<63>1:15 [3FF]
08
43
FF
00
00
00
00
00
00
<63>1:15 [3FF]
03
84
00
00
Poll to LRP830
This is the form of a null command from the PLC to the LRP830. No command is issued with this poll and
only the ACK bit is set in the header word.
MCID/MSGID
Lgth
Frg
.Hdr.
<63>2:05 [5FD]
08
00
04
00
User Data
00
00
00
00
00
<63>2:05 [5FD]
08
41
00
00
00
00
00
00
00
<63>2:05 [5FD]
08
42
00
00
00
00
00
00
00
<63>2:05 [5FD]
08
43
00
00
00
00
00
00
00
<63>2:05 [5FD]
03
84
00
00
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
181
Header Device Type Command Protocol
The following sequence shows the handshaking that will occur between a
PLC DeviceNet scanner host and the LRP830. The ladder logic in the PLC
must respond with an acknowledgment for each message uploaded from the
LRP830.
Figure 40 — LRP830 Handshaking Flow
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Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
Polls and responses occur at the poll rate of the scanner. The recommended
interscan poll delay setting is 200 milliseconds for initial testing. This setting is made in the DeviceNet Scanner Host. Other polls and responses may
be occurring in between the process blocks shown in Figure 30. This example shows only polls and responses that affect the ACK and REQ bits in the
header word. Multiple handshaking bits may be on in a poll or response
message header.
Calculating Message Size
The DeviceNet message will be fragmented into four, 8 byte fragments
when traversing the CAN bus. The first byte of every fragment is reserved
for the fragment header byte. The fragment header byte count is not included
in the total message size.
The LRP830 supports message sizes between 0 and 254 bytes. When specifying the DeviceNet Transmit (Tx) and Receive (Rx) poll message sizes, the
number specified represents the total DeviceNet message size. If the Tx or
Rx message is greater than 8 bytes, the DeviceNet protocol automatically
performs message fragmentation. This means a message is sent as a collection of 8-byte fragments. The first byte of every fragment is reserved as a
fragment header but is not considered in the message size calculation.
Message fragmentation is typically transparent to the designer, but to maximize performance and minimize overhead, efficient DeviceNet message
sizes should be considered, as follows.
Generic Device Type
When approximately 29 bytes of user data are required:
29 / 7 = 4.14 ~ 5 fragments (always round to next highest whole number).
Thus 35 is the optimal message size in this case (5 x 7 = 35).
Copyright © 2000 Escort Memory Systems
LRP830-Series Long-Range Passive Reader/Writer
183
Header Device Type
For Header Device Type the fragment calculation is the same but you must
include the 2 bytes of the header word before you calculate the number of
fragments.
For 29 bytes of I/O message (user) data then:
29 + 2 = 31
(add the two byte header)
31 / 7 = 4.43 ~ 5 fragments.
For the above two examples, the user should consider using 35 byte messages to optimize fragmentation overhead.
35 / 7 = 5 fragments
When between 29 and 35 bytes are specified for I/O Tx size and I/O Rx size
(in both the DeviceNet Scanner Host and LRP830 DeviceNet configurations), five fragments are generated each time a message is sent or received
over the DeviceNet bus. Each fragment provides space for 7 bytes of user
data and uses 1 byte overhead (which is transparent to the user).
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