Allen-Bradley 1203-GD2 User manual

User Manual
Bulletin 1203
Serial Communications Module
RS232/422/485 (Using DF1 Protocol)
Catalog Number 1203-GD2, -GK2, -GM2

Important User Information Because of the variety of uses for this equipment and because of the
differences between this solid-state equipment and electromechanical
equipment, the user of and those responsible for applying this equipment
must satisfy themselves as to the acceptability of each application and use
of the equipment. In no event will Allen-Bradley Company be responsible
or liable for indirect or consequential damages resulting from the use or
application of this equipment.
The illustrations shown in this manual are intended solely to illustrate the
text of this manual. Because of the many variables and requirements
associated with any particular installation, the Allen-Bradley Company
cannot assume responsibility or liability for actual use based upon the
illustrative uses and applications.
No patent liability is assumed by Allen-Bradley Company with respect to
use of information, circuits or equipment described in this text.
Reproduction of the content of this manual, in whole or in part, without
written permission of the Allen-Bradley Company is prohibited.
This information in this manual is organized in numbered chapters. Read
each chapter in sequence and perform procedures when you are instructed
to do so. Do not proceed to the next chapter until you have completed all
procedures.
!ATTENTION: Identifies information about practices or
circumstances that can lead to personal injury or death, property
damage or economic loss.
Attentions help you:
•identify a hazard
•avoid the hazard
•recognize the consequences
IMPORTANT: Identifies information that is especially important for
successful application and understanding of the product.

Summary of Changes
Summary Information These changes have been made since any preliminary photocopy
documents were issued:
Chapter 1 A trademark symbol has been added to 1336 PLUS on page 1-1.
Chapter 2 •The word “board” has been changed to “module” in the last sentence of
paragraph four on page 2-1.
•The word “Default” has been added to the description of SW3.7, SW3.8
in, and DH-485 has been removed from, Figure 2.1 on page 2-2.
•The SLC 5/03 illustration in Figure 2.3 on page 2-4 has been reduced 50
percent.
Chapter 3 •The note on page 3-9 has been replaced with a new note.
•The Figure 3.2 heading on page 3-11 has been changed to include 1336
PLUS.
•The 9-pin D-shell in Figure 3.6 on page 3-14 has been changed to match
the same in Figure 3.5.
•The range (7.5 – 500HP) has been removed from the first heading on
page 3-17.
Chapter 5 •Three new tables have replaced Table 5.B on page 5-3.
•The first paragraph on page 5-4 has been changed to accommodate the
three new tables preceding this text.
•A sentence has been added to the end of Item 3, Parameter Read Full, on
page 5-4.
•The Item 8 heading, System File, on page 5–5, has been changed to
System Area.
Chapter 6 •The Figure 5.1 heading on page 6-1 has been changed to Figure 6-1, and
the figure reference in the first paragraph has changed likewise.
•The Table 5.C heading on page 6-2 has changed to Table 6.A.
Notes A Notes section has been added to the end of this document.

Summary of Changes
This Page Intentionally Left Blank

Table of Contents
i
Introduction Chapter 1
Manual Objectives 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Who Should Use This Manual 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Vocabulary 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Firmware Support 1-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Manual Organization 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Safety Precautions 1-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Serial Device Compatibility 1-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Description Chapter 2
Chapter Objectives 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Description 2-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCANport Device Compatibility 2-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Switches 2-5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Installation Chapter 3
Chapter Objectives 3-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Setting Module Configuration Switches 3-1. . . . . . . . . . . . . . . . . . . . . . .
Factory Switch Settings 3-2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switch SW1 3-3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switch SW2 3-6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Switch SW3 3-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Mounting the Communications Module 3-10. . . . . . . . . . . . . . . . . . . . . . .
Enclosed Style Communications Module Dimensions 3-12. . . . . . . . . . . .
Cable Connections 3-13. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RS485/RS422/RS232 Connection Examples 3-13. . . . . . . . . . . . . . .
SCANport Link Connection 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Cable Requirements 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1305 Drive 3-16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1336 PLUS and 1336 FORCE 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . .
SMP 3 3-17. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Supply Connections 3-18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCANport Datalink Operation Chapter 4
Chapter Objectives 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SCANport Datalinks. 4-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Table of Contents
ii
Configuration and Interfacing Chapter 5
Chapter Objectives 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Basic Operation 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Communications Module Data Table Structure and Supported
PCCC Command List 5-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Examples 5-8. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
DF1 Messaging with a PLC-5/80 Example
(Read Parameters 1 through 50) 5-8. . . . . . . . . . . . . . . . . . . . . . . . .
DF1 Messaging with a 1746-BAS Module Example
(Write 10 Parameters then read 10 parameters) 5-10. . . . . . . . . . . . . .
Troubleshooting Chapter 6
Chapter Objectives 6-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Specifications Chapter 7
Chapter Objectives 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Product Specifications 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Module Compatibility 7-1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PLC, PLC-2, PLC-3, and PLC-5 are registered trademarks of
Allen-Bradley Company, Inc.
SMC, PLC-2/30, PLC-5/10, PLC-5/15, PLC-5/25, PLC-5/30, PLC-5/40,
PLC-5/40L, PLC-5/60L, PLC-5/80, and PLC-5/250 are trademarks of
Allen-Bradley Company, Inc.
SCANport is a registered trademark of Allen-Bradley Company, Inc.
SLC 500, SLC-5/02, and SLC-5/03 are registered trademarks of
Allen-Bradley Company, Inc.

1
Chapter
1-1
Introduction
Manual Objectives The purpose of this manual is to provide you with the necessary
information to apply the Serial Communications Module which is available
for products that include the SCANporttcommunications port. Described
in this manual are methods for installing, configuring, and troubleshooting
the Serial Communications Module.
For information on specific features of Allen-Bradley products mentioned
herein, refer to the product user manual.
IMPORTANT: This manual should be read in its entirety before installing,
operating, servicing, or initializing the Serial Communications Module.
Who Should Use This Manual This manual is intended for qualified service personnel responsible for
setting up and servicing of these devices. You must have previous
experience with and a basic understanding of communications terminology,
configuration procedures, required equipment, and safety precautions.
To make efficient use of this Communications Module, you must be able to
program and operate serial communications devices, as well as have a
basic understanding of the parameter settings and functions of the device to
which you are communicating.
Vocabulary In this manual we refer to the:
SSerial Communications Module as “Communications Module.”
SVariable Frequency AC Drive (Bulletin 1305, 1336 FORCE, or
1336 PLUS) as the “Drive” or “SCANport device”.
SProgrammable Logic Controller as the “Programmable Controller” or
“PLC”.
SEarth Ground as “GND”.
Firmware Support This manual supports communications module firmware versions 1.xx (the
“xx” designator may vary). Features that work with specific firmware
versions will be denoted as such.

Chapter 1
Introduction
1-2
Manual Organization This manual is divided into chapters as detailed in Table 1.A.
Table 1.A
Manual Organization and Topics
Chapter Title Topics Covered Related Tasks
1 Introduction Manual objectives, audience, vocabulary,
firmware support information, manual
organization, safety precautions, and serial
device compatibility
2Product Description Communications Module features,
configuration, and diagnostics
3 Installation Mounting, power connections, switch
configuration, cabling, and hardware
4SCANport Datalink Operation Configuring SCANport device Datalinks,
Datalink operation
5Configuration and Interfacing Addressing, information transfer, and sample
programs
6 Troubleshooting LED indications and fault descriptions
7 Specifications Environmental, electrical, and communications
specifications
Safety Precautions
ATTENTION: Only personnel familiar with SCANport devices
and associated machinery should plan or implement the
installation, start-up, configuration, and subsequent maintenance of
the serial communications module. Failure to comply may result in
personal injury and/or equipment damage.
ATTENTION: This Module contains ESD (Electrostatic
Discharge) sensitive parts and assemblies. Static control
precautions are required when installing, testing, servicing, or
repairing this assembly. Component damage may result if ESD
control procedures are not followed. If you are not familiar with
static control procedures, reference Allen-Bradley Publication
8000–4.5.2, Guarding Against Electrostatic Damage or any other
applicable ESD protection handbook.

Chapter 1
Component Test Procedures
1-3
Serial Device Compatibility This Communications Module is intended for use with devices that
communicate via the following protocols:
Hardware Standard Communications Protocol
RS232 DF1
RS422 DF1
RS485 DF1
IMPORTANT: “DF1” protocol is typically used with Allen-Bradley
PLCprogrammable controllers.

Chapter 1
Introduction
1-4
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