Rockwell Automation Allen-Bradley ControlLogix 1756-L Series User manual

ControlLogix
™
System
1756-Lx
User Manual

Important User Information
Because of the variety of uses for the products described in this
publication, those responsible for the application and use of this
control equipment must satisfy themselves that all necessary steps
have been taken to assure that each application and use meets all
performance and safety requirements, including any applicable laws,
regulations, codes and standards.
The illustrations, charts, sample programs and layout examples shown
in this guide are intended solely for purposes of example. Since there
are many variables and requirements associated with any particular
installation, Allen-Bradley does not assume responsibility or liability
(to include intellectual property liability) for actual use based upon
the examples shown in this publication.
Allen-Bradley publication SGI-1.1, Safety Guidelines for the
Application, Installation and Maintenance of Solid-State Control
(available from your local Allen-Bradley office), describes some
important differences between solid-state equipment and
electromechanical devices that should be taken into consideration
when applying products such as those described in this publication.
Reproduction of the contents of this copyrighted publication, in whole
or part, without written permission of Rockwell Automation, is
prohibited.
Throughout this manual we use notes to make you aware of safety
considerations:
Attention statements help you to:
•identify a hazard
•avoid a hazard
•recognize the consequences
Allen-Bradley, ControlLogix, DH+, FlexLogix, PanelView, PLC-5, RSLinx, RSLogix, RSNetWorx, RSView32, and SLC are trademarks
of Rockwell Automation.
ControlNet is a trademark of ControlNet International, Ltd.
Ethernet is a trademark of Digital Equipment Corporation, Intel, and Xerox Corporation.
ATTENTION
!
Identifies information about practices or
circumstances that can lead to personal injury or
death, property damage or economic loss
IMPORTANT Identifies information that is critical for successful
application and understanding of the product.

1Publication 1756-UM001A-EN-P - September 2000
Preface
Purpose of this Manual
This manual guides the development of projects for ControlLogix
controllers. It provides step-by-step procedures on how to establish
communications:
•over the following networks
–Ethernet™
–ControlNet™
–remote I/O
–DH+™
–serial
•with the following devices
–controllers
–I/O
–workstations
–PanelView™terminals
This manual works together with the Logix5000 Controllers Common
Procedures Programming Manual, publication 1756-PM001, which
covers the following tasks:
•Manage project files
•Organize your logic
•Organize tags
•Program routines
•Test a project
•Handle faults
Who Should Use this
Manual
This manual is intended for those individuals who program
applications that use ControlLogix controllers, such as:
•software engineers
•control engineers
•application engineers
•instrumentation technicians

Publication 1756-UM001A-EN-P - September 2000
Preface 2
When to Use this Manual
Use this manual:
•when you are ready to integrate your application with the I/0
devices, controllers, and networks in your system.
•after you perform these actions:
–develop the basic code for your application
–perform isolated tests of your application
How to Use this Manual
This manual is divided into the basic tasks that you perform while
programming a ControlLogix controller.
•Each chapter covers a task.
•The tasks are organized in the sequence that you will typically
perform them.
As you use this manual, you will see some terms that are formatted
differently from the rest of the text:
Text that is: Identifies: For example: Means:
Italic the actual name of an item that you
see on your screen or in an example
Right-click User-Defined … Right-click on the item that is named
User-Defined.
courier information that you must supply
based on your application (a
variable)
Right-click
name_of_program …
You must identify the specific program in
your application. Typically, it is a name or
variable that you have defined.

iPublication 1756-UM001A-EN-P - September 2000
Table of Contents
Chapter 1
Download and Go Online over an
Ethernet
™
Network
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 1-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 1-1
Step 1: Connect a Serial Cable to the Controller . . . . . . . . . 1-2
Step 2: Configure a Serial Driver . . . . . . . . . . . . . . . . . . . . 1-3
Step 3: Assign an IP Address . . . . . . . . . . . . . . . . . . . . . . . 1-4
Step 4: Configure an Ethernet Driver . . . . . . . . . . . . . . . . . 1-5
Step 5: Select a Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
Chapter 2
Communicate with Another
Controller over an Ethernet
™
Network
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 2-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 2-2
Step 1: Add the 1756-ENET Module . . . . . . . . . . . . . . . . . . 2-2
Step 2: Configure the Port . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Step 3: Enter a Message. . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Step 4: Configure the Message . . . . . . . . . . . . . . . . . . . . . . 2-8
Step 5: Stagger the Messages . . . . . . . . . . . . . . . . . . . . . . . 2-11
Step 6: Access ControlLogix Data. . . . . . . . . . . . . . . . . . . . 2-12
Chapter 3
Communicate with an RSView32
™
Project over an Ethernet
™
Network
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 3-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 3-1
Step 1: Add the 1756-ENET Module . . . . . . . . . . . . . . . . . . 3-2
Step 2: Configure the Port . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Step 3: Configure an Ethernet Driver . . . . . . . . . . . . . . . . . 3-5
Step 4: Select a Communication Method. . . . . . . . . . . . . . . 3-6
Step 5: Create a Polled Topic. . . . . . . . . . . . . . . . . . . . . . . 3-6
Step 6: Create a Polled Node . . . . . . . . . . . . . . . . . . . . . . . 3-7
Step 7: Create a Polled Tag . . . . . . . . . . . . . . . . . . . . . . . . 3-8
Step 8: Create a Unsolicited Topic . . . . . . . . . . . . . . . . . . . 3-10
Step 9: Enter a Message. . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12
Step 10: Configure the Message . . . . . . . . . . . . . . . . . . . . . 3-14
Step 11: Create an Unsolicited Node . . . . . . . . . . . . . . . . . 3-16
Step 12: Create an Unsolicited Tag. . . . . . . . . . . . . . . . . . . 3-17
Step 13: Validate the Tag. . . . . . . . . . . . . . . . . . . . . . . . . . 3-18
Chapter 4
Communicate with 1756 I/O
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 4-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 4-1
Step 1: Add the Local 1756-CNB Module . . . . . . . . . . . . . . 4-2
Step 2: Add the Remote 1756-CNB Module. . . . . . . . . . . . . 4-4
Step 3: Add I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . 4-6
Step 4: Create Aliases . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4-10
Step 5: Schedule the ControlNet Network. . . . . . . . . . . . . . 4-13

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Table of Contents ii
Step 6: Validate Connections . . . . . . . . . . . . . . . . . . . . . . . 4-14
Chapter 5
Communicate with 1771 I/O Over a
ControlNet
™
Network
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 5-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 5-1
Step 1: Add the Local 1756-CNB Module . . . . . . . . . . . . . . 5-2
Step 2: Add the 1771-ACN Module. . . . . . . . . . . . . . . . . . . 5-4
Step 3: Create Aliases . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5-6
Step 4: Schedule the ControlNet Network. . . . . . . . . . . . . . 5-8
Step 5: Validate Connections . . . . . . . . . . . . . . . . . . . . . . . 5-9
Chapter 6
Communicate with 1794 I/O Over a
ControlNet
™
Network
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 6-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 6-1
Step 1: Add the local 1756-CNB module. . . . . . . . . . . . . . . 6-2
Step 2: Add the Remote 1794-ACN Module. . . . . . . . . . . . . 6-4
Step 3: Add I/O Modules. . . . . . . . . . . . . . . . . . . . . . . . . . 6-6
Step 4: Create Aliases . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-10
Step 5: Schedule the ControlNet Network. . . . . . . . . . . . . . 6-13
Step 6: Validate Connections . . . . . . . . . . . . . . . . . . . . . . . 6-14
Chapter 7
Communicate with Another
Controller over a ControlNet
™
Network
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 7-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 7-2
Step 1: Add the 1756-CNB Module. . . . . . . . . . . . . . . . . . . 7-3
Step 2: Add the Remote 1756-CNB Module. . . . . . . . . . . . . 7-5
Step 3: Add the 1788-CNC Module. . . . . . . . . . . . . . . . . . . 7-8
Step 4: Add the Other Controller . . . . . . . . . . . . . . . . . . . . 7-10
Step 5: Enter a Message. . . . . . . . . . . . . . . . . . . . . . . . . . . 7-12
Step 6: Configure the Message . . . . . . . . . . . . . . . . . . . . . . 7-14
Step 7: Stagger the Messages . . . . . . . . . . . . . . . . . . . . . . . 7-16
Step 8: Access ControlLogix Data. . . . . . . . . . . . . . . . . . . . 7-16
Chapter 8
Route PLC-5
®
Messages Between
ControlNet
™
Networks
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 8-1
Route a ControlNet Message . . . . . . . . . . . . . . . . . . . . . . . 8-2
Chapter 9
Communicate with a PanelView
™
Terminal Over a ControlNet
™
Network
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 9-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 9-2
Step 1: Add the Local 1756-CNB Module . . . . . . . . . . . . . . 9-2
Step 2: Add the PanelView Terminal . . . . . . . . . . . . . . . . . 9-5
Step 3: Organize Your Scheduled Data. . . . . . . . . . . . . . . . 9-8
Step 4: Organize Your Unscheduled Data. . . . . . . . . . . . . . 9-10

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Table of Contents iii
Step 5: Configure the PanelView Terminal . . . . . . . . . . . . . 9-12
Step 6: Create PanelView Tags. . . . . . . . . . . . . . . . . . . . . . 9-14
Step 7: Schedule the ControlNet Network. . . . . . . . . . . . . . 9-16
Step 8: Validate Connections . . . . . . . . . . . . . . . . . . . . . . . 9-17
Chapter 10
Communicate with an RSView32
™
Project over a ControlNet
™
Network
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 10-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 10-1
Step 1: Add the 1756-CNB Module. . . . . . . . . . . . . . . . . . . 10-2
Step 2: Configure a ControlNet Driver . . . . . . . . . . . . . . . . 10-4
Step 3: Select a Communication Method. . . . . . . . . . . . . . . 10-5
Step 4: Create a Polled Topic. . . . . . . . . . . . . . . . . . . . . . . 10-5
Step 5: Create a Polled Node . . . . . . . . . . . . . . . . . . . . . . . 10-7
Step 6: Create a Polled Tag . . . . . . . . . . . . . . . . . . . . . . . . 10-8
Step 7: Create a Unsolicited Topic . . . . . . . . . . . . . . . . . . 10-10
Step 8: Enter a Message. . . . . . . . . . . . . . . . . . . . . . . . . . 10-12
Step 9: Configure the Message . . . . . . . . . . . . . . . . . . . . . 10-14
Step 10: Create an Unsolicited Node . . . . . . . . . . . . . . . . 10-16
Step 11: Create an Unsolicited Tag. . . . . . . . . . . . . . . . . . 10-17
Step 12: Validate the Tag. . . . . . . . . . . . . . . . . . . . . . . . . 10-18
Chapter 11
Monitor Connections
When To Use This Procedure . . . . . . . . . . . . . . . . . . . . . . 11-1
Monitor a Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11-2
Chapter 12
Communicate with a DeviceNet
Device
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 12-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 12-1
Step 1: Add the 1756-DNB Module . . . . . . . . . . . . . . . . . . 12-1
Step 2: Create Aliases . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12-4
Step 3: Set the Scanner to Run Mode . . . . . . . . . . . . . . . . . 12-6
Chapter 13
Communicate with Another
Controller Over a DH+
™
Network
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 13-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 13-1
Step 1: Configure Routing Tables . . . . . . . . . . . . . . . . . . . . 13-2
Step 2: Configure a 1756-DHRIO Channel . . . . . . . . . . . . . 13-7
Step 3: Add a 1756-DHRIO Module . . . . . . . . . . . . . . . . . . 13-9
Step 4: Enter a Message. . . . . . . . . . . . . . . . . . . . . . . . . . 13-12
Step 4: Configure the Message . . . . . . . . . . . . . . . . . . . . . 13-14
Step 6: Stagger the Messages . . . . . . . . . . . . . . . . . . . . . . 13-18
Step 7: Access ControlLogix Data. . . . . . . . . . . . . . . . . . . 13-18

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Table of Contents iv
Chapter 14
Route PLC-5
®
or SLC 500
™
Messages From a DH+
™
Network
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 14-1
Step 1: Configure Routing Tables . . . . . . . . . . . . . . . . . . . . 14-2
Step 2: Configure a PLC-5 or SLC 500 Message . . . . . . . . . . 14-6
Chapter 15
Communicate Over a Remote I/O
Network
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 15-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 15-1
Step 1: Add a 1756-DHRIO Module . . . . . . . . . . . . . . . . . . 15-2
Step 2: Add a Remote I/O Adapter. . . . . . . . . . . . . . . . . . . 15-5
Step 3: Add a Remote I/O Module . . . . . . . . . . . . . . . . . . . 15-8
Step 4: Enter Messages . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-9
Step 5: Configure Messages . . . . . . . . . . . . . . . . . . . . . . . 15-11
Step 6: Create Aliases . . . . . . . . . . . . . . . . . . . . . . . . . . . 15-12
Step 7: Validate Connections . . . . . . . . . . . . . . . . . . . . . . 15-14
Step 8: Stagger the Messages . . . . . . . . . . . . . . . . . . . . . . 15-15
Chapter 16
Download and Go Online over a
Serial Cable
When to Use this Procedure . . . . . . . . . . . . . . . . . . . . . . . 16-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 16-1
Step 1: Connect a Serial Cable . . . . . . . . . . . . . . . . . . . . . . 16-2
Step 2: Configure a Serial Driver . . . . . . . . . . . . . . . . . . . . 16-3
Step 3: Select a Path . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16-4
Chapter 17
Communicate with an ASCII
Device
When to Use this Procedure . . . . . . . . . . . . . . . . . . . . . . . 17-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 17-1
Step 1: Connect the ASCII Device . . . . . . . . . . . . . . . . . . . 17-2
Step 2: Configure the Serial Port . . . . . . . . . . . . . . . . . . . . 17-3
Step 3: Configure the User Protocol . . . . . . . . . . . . . . . . . . 17-5
Chapter 18
Configure DF1 Master and Slave
Communications
When to Use this Procedure . . . . . . . . . . . . . . . . . . . . . . . 18-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 18-2
Step 1: Connect and Configure the Modems. . . . . . . . . . . . 18-2
Step 2: Select a Polling Mode. . . . . . . . . . . . . . . . . . . . . . . 18-3
Step 3: Configure the Master Controller for Standard
Polling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-3
Step 4: Configure the Master Controller for Message-Based
Polling . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18-8
Step 5: Configure a Slave Controller. . . . . . . . . . . . . . . . . 18-10
Step 6: Enter a Message. . . . . . . . . . . . . . . . . . . . . . . . . . 18-12
Step 7: Configure the Message . . . . . . . . . . . . . . . . . . . . . 18-14
Step 8: Stagger the Messages . . . . . . . . . . . . . . . . . . . . . . 18-17

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Table of Contents v
Chapter 19
Configure Dial-Up
Communications
When to Use this Procedure . . . . . . . . . . . . . . . . . . . . . . . 19-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 19-1
Step 1: Connect and Configure the Modems. . . . . . . . . . . . 19-2
Step 2: Configure the Serial Port of the Controller. . . . . . . . 19-3
Step 3: Dial the Other Controller . . . . . . . . . . . . . . . . . . . . 19-5
Step 4: Send the Message . . . . . . . . . . . . . . . . . . . . . . . . . 19-6
Step 5: Configure the Message . . . . . . . . . . . . . . . . . . . . . . 19-8
Step 6: Hang-Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19-11
Step 7: Stagger the Messages . . . . . . . . . . . . . . . . . . . . . . 19-12
Chapter 20
Program Motion Control
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 20-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 20-1
Step 1: Select a Master Controller. . . . . . . . . . . . . . . . . . . . 20-2
Step 2: Configure a 1756-M02AE Module . . . . . . . . . . . . . . 20-2
Step 3: Run Hookup Diagnostics and Auto Tuning . . . . . . . 20-8
Step 4: Develop Logic for Motion Control . . . . . . . . . . . . . 20-9
Chapter 21
Maintain the Battery
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . 21-1
How to Use This Procedure. . . . . . . . . . . . . . . . . . . . . . . . 21-1
Step 1: Estimate Battery Life. . . . . . . . . . . . . . . . . . . . . . . . 21-1
Step 2: Store Replacement Batteries . . . . . . . . . . . . . . . . . . 21-8
Step 3: Replace a Battery. . . . . . . . . . . . . . . . . . . . . . . . . . 21-8
Appendix A
Map a PLC/SLC Address
When To Use This Procedure . . . . . . . . . . . . . . . . . . . . . . A-1
Map an Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Appendix B
Estimate Execution Time
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . B-1
Estimate Execution Time . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Reference Tables. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-3
Appendix C
Estimate Memory Use
When to Use This Procedure . . . . . . . . . . . . . . . . . . . . . . . C-1
Data Conversions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-2
Ladder Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-3
Function Block Instructions . . . . . . . . . . . . . . . . . . . . . . . . C-7
Array Indexes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-8

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