Allen-Bradley ControlNet ControlLogix 1756 User manual

User Manual
ControlNet Network Configuration
1756 ControlLogix, 1756 GuardLogix, 1769 CompactLogix, 1769 Compact GuardLogix, 1789
SoftLogix, Studio 5000 Logix Emulate

Important User Information
Solid-state equipment has operational characteristics differing from those of electromechanical equipment. Safety
Guidelines for the Application, Installation and Maintenance of Solid State Controls (publication SGI-1.1 available from
your local Rockwell Automation sales office or online at http://www.rockwellautomation.com/literature/) describes some
important differences between solid-state equipment and hard-wired electromechanical devices. Because of this difference,
and also because of the wide variety of uses for solid-state equipment, all persons responsible for applying this equipment
must satisfy themselves that each intended application of this equipment is acceptable.
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
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.
BURNHAZARD: Labelsmay beonorinsidetheequipment,for example,a driveormotor,toalertpeoplethat
surfaces may reach dangerous temperatures.
IMPORTANT Identifies information that is critical for successful application and understanding of the product.
Allen-Bradley, ArmorPOINT, CompactLogix, ControlLogix, Data Highway Plus, DriveLogix, FlexLogix, FLEX Ex, FLEX I/O, Logix 5000, PanelView, PanelView Plus, POINT I/O, PowerFlex 700S, Rockwell Software,
Rockwell Automation, RSLinx, RSLinx Classic, RSLogix, RSLogix 5000, RSNetWorx, RSNetWorx for ControlNet, RSView, SoftLogix, and TechConnect are trademarks of Rockwell Automation, Inc.
Trademarks not belonging to Rockwell Automation are property of their respective companies.

SummaryofChanges
This document contains new and updated information. Changes are designated
by change bars in the outside margins.
Updated Information
This document contains these changes.
Topic Chapter
Updated supported controller models. Cover
Rockwell Automation Publication CNET-UM001E-EN-P - June 2016 3

Summary of Changes
Notes:
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Table of Contents
Preface Additional Resources...........................................................................................7
Chapter 1
ControlNet Overview Use ControlNet Communication Modules in a Control System...............9
Bridge Across Networks................................................................................... 11
Exchange Information on a ControlNet Network ..................................... 14
Network Update Time (NUT)............................................................... 16
Requested Packet Interval (RPI) ............................................................. 17
Actual Packet Interval (API).................................................................... 17
Schedule the Network............................................................................... 18
Understand the Network Keeper ........................................................... 19
Default Parameters..................................................................................... 21
ControlNet Network Capacity and Topology ............................................ 21
Topology ..................................................................................................... 21
Number of Nodes ...................................................................................... 24
Lengths......................................................................................................... 24
ConnectaComputertothe
ControlNet Network
Chapter 2
Configure the ControlNet Communication Driver
in RSLinx Classic Software.............................................................................. 26
Chapter 3
Configurea ControlNet Module Use RSLogix 5000 Software............................................................................ 29
Configure the I/O Configuration Tree in Your Project..................... 29
Add and Configure a Local ControlNet Module................................. 30
Add and Configure a Remote ControlNet Module ............................ 33
Download the Project to the Logix5000 Controller............................ 36
Electronic Keying....................................................................................... 37
Use RSNetWorx for ControlNet Software.................................................. 44
Schedule a ControlNet Network for the First Time ........................... 44
Schedule the Network Offline................................................................. 45
Schedule the Network Online ................................................................. 49
Reschedule a ControlNet Network
that has Previously been Scheduled......................................................... 53

Table of Contents
Chapter 4
ControlI/O Set Up the Hardware.........................................................................................56
Requested Packet Interval (RPI).....................................................................56
Communication Format ..................................................................................57
Direct or Rack-optimized Connections..................................................58
Ownership ...................................................................................................61
Add a Remote Adapter .....................................................................................63
Add Distributed I/O.........................................................................................63
Distributed I/O Communication Formats............................................65
Access Distributed I/O.....................................................................................65
Validate Connections........................................................................................68
Produce and Consume Tags
(interlock controllers)
Chapter 5
Terminology .......................................................................................................71
Set Up the Hardware.........................................................................................72
Determine Connections for Produced and Consumed Tags.....................73
Organize Tags for Produced or Consumed Data .........................................75
Adjust for Bandwidth Limitations..................................................................76
Produce a Tag .....................................................................................................77
Consume a Tag ..................................................................................................79
Chapter 6
Messaging Set Up the Hardware.........................................................................................84
Guidelines for MSG Instructions ...................................................................85
Determine Connections for Messages............................................................86
Guidelines for Caching Message Connections......................................86
Enter Message Logic..........................................................................................86
Add the ControlNet Modules and Remote Devices
to the Local Controller’s I/O Configuration.........................................87
Enter a Message...........................................................................................88
Configure a Message Instruction....................................................................88
Stagger the Messages..........................................................................................90
Communicate with PanelView
Terminals
Chapter 7
Set Up the Hardware.........................................................................................92
Determine Connections to PanelView Terminals.......................................93
Add a PanelView Terminal..............................................................................94
Organize Controller Data for a PanelView Terminal .................................96
Index ...............................................................................................................................................................................................97
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Preface
This manual describes how you can use ControlNet communication modules
with your Logix5000 controller.
Use this manual if you program applications that use a ControlNet network with
one of these Logix5000 controllers:
•
•CompactLogixcontroller
•ControlLogixcontroller
•PowerFlex 700S with DriveLogix controller
SoftLogix5800controller
Also be familiar with the following:
•
•Networkingconcepts
•
•
RSLogix 5000 software
RSLinx Classic software
RSNetWorx for
ControlNet software
Additional Resources
These documents contain additional information concerning related products
from Rockwell Automation.
Resource Description
ControlNet Modules Installation Instructions,
publication CNET-IN005
Describes how to install 1756-CN2, 1756-CN2R,
1756-CN2RXT, 1756-CNB, 1756-CNBR, 1768-CNB,
and 1768-CNBR ControlNet modules.
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.
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.
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Preface
Notes:
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Chapter 1
ControlNet Overview
The ControlNet network provides high-speed transmission of time-critical I/O
and interlocking data and messaging data. This data transfer capability enhances
I/O performance and peer-to-peer communication in any system or application.
The ControlNet network is highly deterministic and repeatable and remains
unaffected as devices are connected or disconnected from it. This ensures
dependable, synchronized, and coordinated real-time performance.
The ControlNet network is most often used in these ways:
•
•
As the default network for the ControlLogix platform
•
As a backbone to multiple distributed DeviceNet networks
As a peer interlocking network
This chapter describes how you can use ControlNet modules in a network
control system.
Topic Page
Use ControlNet Communication Modules in a Control System
9
Bridge Across Networks 11
Exchange Information on a ControlNet Network 14
ControlNet Network Capacity and Topology 21
Use ControlNet
Communication Modules in
a Control System
You can fit various ControlNet modules into your control system.
Figure 1 on page 10 shows the following:
•
•The controllers produce and consume tags among themselves.
The controllers initiate MSG instructions that send/receive data or
•configure devices.
•The computer uploads and downloads projects to the controllers.
The computer configures devices on the ControlNet network and
configures the network itself.
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Chapter 1 ControlNet Overview
Figure1 -ControlNetModulesand the ControlSystemOverview
Item Description
1 Personal computer running SoftLogix5800 controller with 1784-PCICS card
2 1756-CNB module (as an adapter) with 1756 I/O modules
3 PowerFlex 700S drive
4 1794-ACN15 adapter with 1794 I/O modules
5 1734-ACNR adapter with 1734 I/O modules
6
PanelView terminal
7 CompactLogix 1769-L35CR controller with local 1769 I/O modules
8
ControlLogix controller with 1756-CN2, 1756-CN2R, 1756-CNB, or 1756-CNBR module
as the scanner
IMPORTANT
For an enhanced redundancy system, you must use a 1756-CNB,
1756-CNBR, 1756-CN2 series B, or 1756-CN2R series B communication
module. The 1756-CN2 or 1756-CN2R series A module does not support
enhancedredundancy. Formoreinformation,refertothe ControlLogix
Enhanced Redundancy System User Manual, publication 1756-UM535.
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