Rockwell Automation Allen-Bradley Logix 5000 Series Owner's manual

Rockwell Automation Publication 1756-PM013H-EN-P - March 2022
Supersedes Publication 1756-PM013G-EN-P - September 2020
Programming Manual
Original Instructions
Logix 5000 Controllers
ASCII Strings
1756 ControlLogix, 1756 GuardLogix, 1769 CompactLogix,
1769 Compact GuardLogix, 1789 SoftLogix, 5069
CompactLogix, 5069 Compact GuardLogix, Studio 5000
Logix Emulate

Logix 5000 Controllers ASCII Strings
2 Rockwell Automation Publication 1756-PM013H-EN-P - March 2022
Important User Information
Read this document and thedocuments 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 inaccordance 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 orliable 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, withoutwritten permission of Rockwell Automation, Inc., is
prohibited.
Throughout this manual, when necessary, we use notes to make you aware of safety considerations.
WARNING: Identifies information about practices or circumstances that can cause an explosion in a hazardous environment, whichmay 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.
Labels may also be on or inside the equipment to provide specific precautions.
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 peoplethat 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 recognizes that some of the terms that are currently used in our industry and in this publication are not in
alignment with the movement toward inclusive language intechnology. We are proactively collaborating with industry peers to
find alternatives to such terms and making changes to our products and content. Please excuse the use of such terms in our
content while we implement these changes.

Rockwell Automation Publication 1756-PM013H-EN-P - March 2022 3
Summary of Changes
This manual includes new and updated information. Use these reference
tables to locate changed information.
Grammatical and editorial style changes are not included in this summary.
Global changes
This table identifies changes that apply to all information about a subject in
the manual and the reason for the change. For example, the addition of new
supported hardware, a software design change, or additional reference
material would result in changes to all of the topics that deal with that subject.
Change
Topic
Updated Legal notices.
Legal notices
New or enhanced features
None in this release.

Rockwell Automation Publication 1756-PM013H-EN-P - March 2022 5
Table of Contents
Studio 5000 environment ...........................................................................7
Additional resources....................................................................................7
Legal Notices ................................................................................................8
Chapter 1
Introduction.................................................................................................9
Connect the ASCII device............................................................................9
Configure the Serial Port...........................................................................10
Configure the User Protocol......................................................................12
Create string data types.............................................................................13
Read characters from the device ...............................................................14
Send characters to the device ....................................................................15
Enter ASCII characters ..............................................................................16
Chapter 2
Introduction............................................................................................... 19
Extract a part of a Bar Code ...................................................................... 19
Look up a Bar Code....................................................................................20
Create the PRODUCT_INFO Data Type ............................................20
Search for the characters.....................................................................21
Identify the Lane Number...................................................................21
Reject bad characters .......................................................................... 22
Enter the Product IDs and Lane Numbers........................................ 22
Check the Bar Code characters................................................................. 22
Convert a value ...........................................................................................23
Decode an ASCII message ........................................................................ 24
Build a string ............................................................................................. 25
Appendix A
ASCII character codes ...............................................................................27
Summary of Changes
Preface
Communicating with an ASCII
device
Processing ASCII characters
ASCII character codes
Index

Rockwell Automation Publication 1756-PM013H-EN-P - March 2022 7
Preface
This manual shows how to manipulate ASCII strings in Logix 5000
controllers. This manual is one of a set of related manuals that show common
procedures for programming and operating Logix 5000 controllers.
For a complete list of common procedures manuals, refer to the Logix 5000
Controllers Common Procedures Programming Manual, publication
1756-PM001.
The term Logix 5000 controller refers to any controller based on the Logix
5000 operating system.
The Studio 5000 Automation Engineering & Design Environment® combines
engineering and design elements into a common environment. The first
element is the Studio 5000 Logix Designer® application. The Logix Designer
application is the rebranding of RSLogix 5000® software and will continue to
be the product to program Logix 5000™ 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. The Studio
5000 environment is the one place for design engineers to develop all
elements of their control system.
These documents contain additional information concerning related
Rockwell Automation products.
Resource
Description
Industrial Automation Wiring and Grounding Guidelines,
publication 1770-4.1 Provides general guidelines for installing a Rockwell
Automation industrial system.
Product Certifications webpage, available at
http://ab.rockwellautomation.com
Provides declarations of conformity, certificates, and
other certification details.
Studio 5000 environment
Additional resources

Preface
8 Rockwell Automation Publication 1756-PM013H-EN-P - March 2022
View or download publications at
http://www.rockwellautomation.com/literature. To order paper copies of
technical documentation, contact the local Rockwell Automation distributor
or sales representative.
Rockwell Automation publishes legal notices, such as privacy policies, license
agreements, trademark disclosures, and other terms and conditions on the
Legal Notices page of the Rockwell Automation website.
End User License Agreement (EULA)
You can view the Rockwell Automation End-User License Agreement ("EULA")
by opening the License.rtf file located in your product's install folder on your
hard drive.
Open Source Licenses
The software included in this product contains copyrighted software that is
licensed under one or more open source licenses. Copies of those licenses are
included with the software. Corresponding Source code for open source
packages included in this product are located at their respective web site(s).
Alternately, obtain complete Corresponding Source code by contacting
Rockwell Automation via the Contact form on the Rockwell Automation
website:
http://www.rockwellautomation.com/global/about-us/contact/contact.page
Please include "Open Source" as part of the request text.
A full list of all open source software used in this product and their
corresponding licenses can be found in the OPENSOURCE folder. The default
installed location of these licenses is C:\Program Files (x86)\Common
Files\Rockwell\Help\<Product Name>\Release
Notes\OPENSOURCE\index.htm.
Legal Notices

Rockwell Automation Publication 1756-PM013H-EN-P - March 2022 9
Chapter 1
Communicating with an ASCII device
You can exchange ASCII data with a device through the serial port of the
controller. For example, you can use the serial port to:
•Read ASCII characters from a weigh scale module or bar code reader.
•Send and receive messages from an ASCII triggered device, such as a
MessageView terminal.
Firmware revision 3.1 and later of the 1756-EWEB EtherNet/IP Web Server
module supports the controller serial port and a socket interface that lets
Logix 5000 controllers exchange ASCII data using TCP or UDP socket
services.
To connect to the ASCII device, use these steps.
1. On the serial port of the ASCII device, determine which pins send
signals and which pins receive signals.
2. Connect sending pins to corresponding receiving pins and attach
jumpers.
Introduction
Connect the ASCII device

Chapter 1 Communicating with an ASCII device
10 Rockwell Automation Publication 1756-PM013H-EN-P - March 2022
If the communications
Then wire the connectors
Handshake
Do not handshake
3. Attach the cable shield to the connectors.
4. Connect the cable to the controller and the ASCII device.
To configure the serial port, use these steps.
1. On the Online toolbar, click the Controller Properties button.
2. On the Controller Properties dialog box, click the Serial Port tab.
Configure the Serial Port