Rockwell Automation Allen-Bradley 1769-ASCII User manual

Compact I/O ASCII Module
Catalog Numbers 1769-ASCII
User Manual

Important User Information
Read this document and the documents listed in the additional resources section about installation, configuration, and
operation of this equipment before you install, configure, operate, or maintain this product. Users are required to
familiarize themselves with installation and wiring instructions in addition to requirements of all applicable codes, laws,
and standards.
Activities including installation, adjustments, putting into service, use, assembly, disassembly, and maintenance are required
to be carried out by suitably trained personnel in accordance with applicable code of practice.
If this equipment is used in a manner not specified by the manufacturer, the protection provided by the equipment may be
impaired.
In no event will Rockwell Automation, Inc. be responsible or liable for indirect or consequential damages resulting from the
use or application of this equipment.
The examples and diagrams in this manual are included solely for illustrative purposes. Because of the many variables and
requirements associated with any particular installation, Rockwell Automation, Inc. cannot assume responsibility or
liability for actual use based on the examples and diagrams.
No patent liability is assumed by Rockwell Automation, Inc. with respect to use of information, circuits, equipment, or
software described in this manual.
Reproduction of the contents of this manual, in whole or in part, without written permission of Rockwell Automation,
Inc., is prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
Labels may also be on or inside the equipment to provide specific precautions.
Allen-Bradley, Rockwell Software, Rockwell Automation, Compact I/O, CompactLogix, Logix5000, MicroLogix, RSLogix, Studio 5000 Logix Designer, and Studio 5000 are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment,
which may lead to personal injury or death, property damage, or economic loss.
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 a hazard, and recognize the consequence.
IMPORTANT
Identifies information that is critical for successful application and understanding of the product.
SHOCK HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that dangerous
voltage may be present.
BURN HAZARD: Labels may be on or inside the equipment, for example, a drive or motor, to alert people that surfaces may
reach dangerous temperatures.
ARC FLASH HAZARD: Labels may be on or inside the equipment, for example, a motor control center, to alert people to
potential Arc Flash. Arc Flash will cause severe injury or death. Wear proper Personal Protective Equipment (PPE). Follow ALL
Regulatory requirements for safe work practices and for Personal Protective Equipment (PPE).

Rockwell Automation Publication 1769-UM012B-EN-P - January 2014 3
Summary of Changes
This manual contains new and updated information. Changes throughout this
revision are marked by change bars, as shown to the right of this paragraph.
New and Updated
Information
This table contains the changes made to this revision.
Topic Page
Rearranged content and updated warnings and attentions. Throughout
Updated configuration to include the CompactLogix™ 5370 L3 controller,
provided link to the Knowledgebase Technote # 64203. 7
Added information about the Studio 5000™ environment. 7
Updated Additional Resources. 8
Updated configuration examples. 21
Updated I/O Memory Mapping to include the new tag structures. 71
Added the Generic Module appendix. 87
Added Electronic Keying appendix. 105
Updated Technical Support links, website addresses, and phone numbers. BackCover

4Rockwell Automation Publication 1769-UM012B-EN-P - January 2014
Summary of Changes
Notes:

Rockwell Automation Publication 1769-UM012B-EN-P - January 2014 5
Table of Contents
Preface Studio 5000 Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Additional Resources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Example Programs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Chapter 1
Compact I/O ASCII Module
About the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Environment and Enclosure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
North American Hazardous Location Approval . . . . . . . . . . . . . . . . . . . . 11
European Hazardous Location Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Install the Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Assemble the System . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Minimum Space. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Panel Mount. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
DIN Rail Mount . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
Replace a Module. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Ground the Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Connect the D-sub Connector Pins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Chapter 2
Configure the 1769-ASCII Module
Configure the 1769-ASCII Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Module Definition Dialog Box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Controller-scoped Tags . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Data Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Connect to Channel 0 of the Module in Alternating Mode . . . . . . . . . . 34
Ladder Logic Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Configure the Module Properties . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Connect to Both Channels of the Module in Alternating Mode. . . . . . 41
Ladder Logic Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Connect to Both Channels of the 1769-ASCII Module in Simultaneous
Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Ladder Logic Example . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
Configure the Module for Use with a MicroLogix Controller . . . . . . . . 59
Programming Example: MicroLogix 1500 Controller . . . . . . . . . . . . . . . 62
Chapter 3
I/O Memory Mapping
ASCII Module Behavior when not in Run Mode . . . . . . . . . . . . . . . . . . . 71
Alternate Mode (one channel at a time) Output File . . . . . . . . . . . . . . . . 72
Alternate Mode (one channel at a time) Input File . . . . . . . . . . . . . . . . . . 73
Simultaneous Mode
(two channels) Input File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 74
Simultaneous Mode (two channels) Output File . . . . . . . . . . . . . . . . . . . . 75
Status Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 76
Configuration File . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 77
Configuration File Parameter Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . 79

6Rockwell Automation Publication 1769-UM012B-EN-P - January 2014
Table of Contents
Data Buffer Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Set Up the Data Frame Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Receive Delimiter Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 79
Set Up the Receive Delimiters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Set Up the Transmit Delimiter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 81
Set Up the Receive Character Buffer Length . . . . . . . . . . . . . . . . . . . . 81
Set Up the Transmit Character Buffer Length . . . . . . . . . . . . . . . . . . 82
Receive Data Padding . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Byte Swap Mode. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Transmit Serial ASCII Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Receive ASCII Serial Data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83
Receive Timeout. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
How to Send Data from the 1769-ASCII Module. . . . . . . . . . . . . . . . . . . 84
How to Receive Serial Data from the 1769-ASCII Module. . . . . . . . . . . 85
Master/Slave Handshake. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 85
Appendix A
Configure the 1769-ASCII Module as a Generic Module . . . . . . . . . . . . .87
Appendix B
Status Indicators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .95
Appendix C
Error Codes. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Configuration Errors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Logix Designer Example Report . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 100
RSLogix 500 Error Report Example. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Appendix D
ASCII Conversion Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 103
Appendix E
Using Electronic Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Electronic Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
Exact Match . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
Compatible Keying . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 107
Disabled Keying. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109
Appendix F
History of Changes
1769-UM012B-EN-P September 2013. . . . . . . . . . . . . . . . . . . . . . . . . . . . 113
Index

Rockwell Automation Publication 1769-UM012B-EN-P - January 2014 7
Preface
This manual describes how to install, configure, and troubleshoot your
Compact I/O™ 1769-ASCII module. You must be able to use RSLogix™ software
and the Studio 5000 Logix Designer™ application to configure this module.
The 1769-ASCII module, a general-purpose two-channel ASCII interface,
provides a flexible network interface to a wide variety of RS-232, RS-485, and
RS-422 ASCII devices.
The 1769-ASCII module provides two independent channels of the ASCII
device interface to the 1769 Compact I/O system. Each serial channel is fully
isolated from the backplane and from each other.
Each channel provides three different media to interface with a serial device and
are automatically selected by making the correct connections to that channel’s
9-pin D-sub connector. The actual media selected is transparent to the
1769-ASCII module.
Studio 5000 Environment The Studio 5000 Engineering and Design Environment combines engineering
and design elements into a common environment. The first element in the Studio
5000 environment is the Logix Designer application. The Logix Designer
application is the rebranding of RSLogix 5000 software and will continue to be
the product to program Logix5000™ controllers for discrete, process, batch,
motion, safety, and drive-based solutions.
The Studio 5000 environment is the foundation for the future of Rockwell
Automation® engineering design tools and capabilities. It is the one place for
design engineers to develop all of the elements of their control system.
IMPORTANT
You can use the 1769-ASCII module with the following controllers:
•CompactLogix 5370 L3 and L2
•1769-L2x and 1769-L3x
•1768-L4x
•MicroLogix™ 1500
TIP
You use RSLogix500™ software to configure the 1769-ASCII module with a
MicroLogix1500 controller.

8Rockwell Automation Publication 1769-UM012B-EN-P - January 2014
Preface
Additional Resources These documents contain additional information concerning related products
from Rockwell Automation.
You can view or download publications at
http://www.rockwellautomation.com/literature/. To order paper copies of
technical documentation, contact your local Allen-Bradley distributor or
Rockwell Automation sales representative.
Example Programs To access these Logix Designer programs, see the Knowledgebase Technote #
64203 at https://rockwellautomation.custhelp.com/app/answers/detail/a_id/
64203.
Resource Description
CompactLogix 5370 L3 Controllers, Revision 20
Release Notes 1769-RN020 Describes enhancements, known anomalies, and restrictions for CompactLogix 5370 L3 controllers,
firmware revisions 20.011…20.013
Compact I/O DeviceNet Adapter User Manual,
publication 1769-UM001 Provides details regarding the installation, configuration, and operation of DeviceNet adapters.
Logix5000 Controllers ASCII Strings Programming
Manual, publication 1756-PM013 Provides details on how to manipulate ASCII strings in Logix5000 controllers.
Compact I/O DeviceNet Scanner Module User Manual,
publication 1769-UM009 Provides details regarding the installation, configuration,
and operation of DeviceNet scanners.
1768 CompactLogix L4xControllers User Manual,
publication 1768-UM001 Provides details regarding the installation, configuration, and operation of the 1768 CompactLogix Controllers,
catalog numbers: 1768-L43, 1768-L45, 1768-L45,
1768-L45S.
CompactLogix L2xUser Manual,
publication 1769-UM007 Provides details regarding the installation, configuration, and operation of the 1768 CompactLogix Controllers,
catalog numbers: 1769-L20, 1769-L30.
CompactLogix L3xUser Manual, publication
1769-UM011 Provides details regarding the installation, configuration,
and operation of the 1768 CompactLogix Controllers,
catalog numbers: 1769-L31, 1769-L32C, 1769-L32E,
1769-L35CR, 1769-L35E.
Industrial Automation Wiring and Grounding
Guidelines, publication 1770-4.1 Provides general guidelines for installing a Rockwell Automation industrial system.
Product Certifications website,
http://www.ab.com Provides declarations of conformity, certificates, and other certification details.

Rockwell Automation Publication 1769-UM012B-EN-P - January 2014 9
Chapter 1
Compact I/O ASCII Module
The 1769-ASCII module provides a flexible network interface to a wide variety
of RS-232, RS-485, and RS-422 ASCII devices.
About the Module The module provides the communication connections to the ASCII device.
Topic Page
About the Module 9
Environment and Enclosure 10
North American Hazardous Location Approval 11
European Hazardous Location Approval 12
Install the Module 13
Assemble the System 14
Ground the Module 17
Connect the D-sub Connector Pins 18
Item Description
1a Upper DIN rail latch
1b Lower DIN rail latch
2a Upper tongue-and-groove slots
2b Lower tongue-and-groove slots
3a Channel 0 isolated ASCII connector
3b Channel 1 isolated ASCII connector
4 Stationary bus connector with male pins
1a
2a
3a
3b
1b
2b
2a
2b
4

10 Rockwell Automation Publication 1769-UM012B-EN-P - January 2014
Chapter 1 Compact I/O ASCII Module
Environment and Enclosure
WARNING: This equipment is intended for use in a Pollution Degree 2
industrial environment, in overvoltage Category II applications (as defined in
IEC publication 60664-1), at altitudes up to 2000 meters (6562 ft) without
derating.
This equipment is considered Group 1, Class A industrial equipment according to
IEC/CISPR Publication 11. Without appropriate precautions, there may be
potential difficulties ensuring electromagnetic compatibility in other
environments due to conducted as well as radiated disturbance.
This equipment is supplied as open-type equipment. It must be mounted within
an enclosure that is suitably designed for those specific environmental
conditions that will be present and appropriately designed to prevent personal
injury resulting from accessibility to live parts. The enclosure must have suitable
flame-retardant properties to prevent or minimize the spread of flame,
complying with a flame spread rating of 5VA, V2, V1, V0 (or equivalent) if non-
metallic. The interior of the enclosure must be accessible only by the use of a
tool. Subsequent sections of this publication may contain additional information
regarding specific enclosure type ratings that are required to comply with certain
product safety certifications. In addition to this publication, see the following:
•Industrial Automation Wiring and Grounding Guidelines, Allen-Bradley
publication 1770-4.1, for additional installation requirements
•NEMA Standards publication 250 and IEC publication 60529, as applicable,
for explanations of the degrees of protection provided by different types of
enclosure