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

Programming Manual
Logix 5000 Controllers Function Block
Diagram
1756 ControlLogix, 1756 GuardLogix, 1769 CompactLogix,
1769 Compact GuardLogix, 1789 SoftLogix, 5069 CompactLogix,
5069 Compact GuardLogix, Studio 5000 Logix Emulate

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.
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.
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
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).
Allen-Bradley, Rockwell Software, Rockwell Automation, and TechConnect are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.

Rockwell Automation Publication 1756-PM009G-EN-P - February 2018 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.
Subject Reason
Updated Logix Designer
application screen shots. The Studio 5000 Logix Designer® interface has been modified in versions 31 and later.
Updated supported controller
models. Added 5069 CompactGuardLogix to the list of supported controllers.
New or enhanced features
None in this release.

Rockwell Automation Publication 1756-PM009G-EN-P - February 2018 5
Table of contents
Studio 5000 environment................................................................................ 7
Additional resources....................................................................................... 8
Legal notices................................................................................................... 8
Chapter 1
Introduction................................................................................................... 11
Choose the function block elements............................................................. 12
Choose a tag name for an element................................................................ 12
Define the order of execution....................................................................... 13
Data latching .......................................................................................... 13
Order of execution.................................................................................. 15
Resolve a loop........................................................................................ 16
Resolve data flow between two blocks .................................................. 17
Create a one scan delay.......................................................................... 18
Summary ................................................................................................ 18
Identify any connectors................................................................................. 18
Define program/operator control.................................................................. 19
Add a sheet ................................................................................................... 21
Add a function block element....................................................................... 22
Create a text box........................................................................................... 23
Language switching................................................................................ 23
Connect elements.......................................................................................... 24
Show or hide a pin.................................................................................. 24
Wire elements together........................................................................... 25
Mark a wire with the Assume Data Available indicator ........................ 25
Assign a tag................................................................................................... 26
Create and assign a new tag ................................................................... 26
Assign an existing tag ............................................................................ 27
Assign an immediate value (constant).......................................................... 28
Use an IREF........................................................................................... 28
Enter a value in the tag of a block.......................................................... 28
Connect blocks with an OCON and ICON................................................... 29
Add an OCON........................................................................................ 29
Add an ICON ......................................................................................... 29
Rename a wire connector....................................................................... 29
Rename a connector group..................................................................... 30
Verify the routine.......................................................................................... 30
Preface
Program a Function
Block Diagram
Index

Rockwell Automation Publication 1756-PM009G-EN-P - February 2018 7
Preface
This manual shows how to program Logix 5000 controllers with the function
block diagram (FBD) programming language. 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 that is 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.
Studio 5000
environment

Preface
8Rockwell Automation Publication 1756-PM009G-EN-P - February 2018
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.
You can view or download publications at
http://www.rockwellautomation.com/literature. To order paper copies of
technical documentation, contact your local Rockwell Automation distributor
or sales representative.
Copyright notice
Copyright © 2018 Rockwell Automation Technologies, Inc. All Rights
Reserved. Printed in USA.
This document and any accompanying Rockwell Software products are
copyrighted by Rockwell Automation Technologies, Inc. Any reproduction
and/or distribution without prior written consent from Rockwell Automation
Technologies, Inc. is strictly prohibited. Please refer to the license agreement
for details.
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.
Other 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 can be located at their respective web
site(s).
You may alternately obtain complete Corresponding Source code by
contacting Rockwell Automation via our 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.
Additional
resources
Legal notices

Preface
Rockwell Automation Publication 1756-PM009G-EN-P - February 2018 9
The following open source software is used in this product:
Software Copyright License Name License Text
AngularJS Copyright 2010-2017 Google, Inc. MIT License AngularJS 1.5.9 License
Bootstrap Copyright 2011-2017 Twitter, Inc.
Copyright 2011-2017 The Bootstrap Authors MIT License Bootstrap 3.3.7 License
jQuery Copyright 2005, 2014 JS Foundation and
other contributors MIT License jQuery 2.1.1 License
OpenSans Copyright 2017 Google, Inc. Apache License,
Version 2.0 OpenSans License
Trademark Notices
Allen-Bradley, ControlBus, ControlFLASH, Compact GuardLogix, Compact
I/O, ControlLogix, CompactLogix, DCM, DH+, Data Highway Plus,
DriveLogix, DPI, DriveTools, Explorer, FactoryTalk, FactoryTalk
Administration Console, FactoryTalk Alarms and Events, FactoryTalk Batch,
FactoryTalk Directory, FactoryTalk Security, FactoryTalk Services Platform,
FactoryTalk View, FactoryTalk View SE, FLEX Ex, FlexLogix, FLEX I/O,
Guard I/O, High Performance Drive, Integrated Architecture, Kinetix,
Logix5000, Logix 5000, Logix5550, MicroLogix, DeviceNet, EtherNet/IP,
PLC-2, PLC-3, PLC-5, PanelBuilder, PowerFlex, PhaseManager, POINT
I/O, PowerFlex, Rockwell Automation, RSBizWare, Rockwell Software,
RSEmulate, Historian, RSFieldbus, RSLinx, RSLogix, RSNetWorx for
DeviceNet, RSNetWorx for EtherNet/IP, RSMACC, RSView, RSView32,
Rockwell Software Studio 5000 Automation Engineering & Design
Environment, Studio 5000 View Designer, SCANport, SLC, SoftLogix,
SMC Flex, Studio 5000, Ultra 100, Ultra 200, VersaView, WINtelligent,
XM, SequenceManager are trademarks of Rockwell Automation, Inc.
Any Rockwell Automation logo, software or hardware product not
mentioned herein is also a trademark, registered or otherwise, of Rockwell
Automation, Inc.
Other Trademarks
CmFAS Assistant, CmDongle, CodeMeter, CodeMeter Control Center, and
WIBU are trademarks of WIBU-SYSTEMS AG in the United States and/or
other countries. Microsoft is a registered trademark of Microsoft Corporation
in the United States and/or other countries. ControlNet is a trademark of
ControlNet International. DeviceNet is a trademark of the Open DeviceNet
Vendors Association (ODVA). Ethernet/IP is a trademark of ControlNet
International under license by ODVA.
All other trademarks are the property of their respective holders and are
hereby acknowledged.

Preface
10 Rockwell Automation Publication 1756-PM009G-EN-P - February 2018
Warranty
This product is warranted in accordance with the product license. The
product’s performance may be affected by system configuration, the
application being performed, operator control, maintenance, and other related
factors. Rockwell Automation is not responsible for these intervening factors.
The instructions in this document do not cover all the details or variations in
the equipment, procedure, or process described, nor do they provide
directions for meeting every possible contingency during installation,
operation, or maintenance. This product’s implementation may vary among
users.
This document is current as of the time of release of the product; however,
the accompanying software may have changed since the release. Rockwell
Automation, Inc. reserves the right to change any information contained in
this document or the software at any time without prior notice. It is your
responsibility to obtain the most current information available from Rockwell
when installing or using this product.
Environmental compliance
Rockwell Automation maintains current product environmental information
on its website at
http://www.rockwellautomation.com/rockwellautomation/about-
us/sustainability-ethics/product-environmental-compliance.page
Contact Rockwell Automation
Customer Support Telephone — 1.440.646.3434
Online Support — http://www.rockwellautomation.com/support/