Allen-Bradley ControlLogix User Manual

1756-6.5.3 - December 1999
Chapter 11
Adding an I/O Chassis to an Existing
ControlNet Network
About the Example Application
Each 1756-CNB interface module can support up to 64 bidirectional
connections. This example application expands the ControlNet network
from the previous chapter by adding another remote I/O chassis. The new
remote chassis contains another “child” 1756-CNB module (configured as
node 3) in slot 0 and an analog output module in slot 1. The ladder program
of the previous chapter is modified to produce a varying signal at one of the
analog output channels. Note that these changes do not affect the operation
of the digital I/O modules in the first remote chassis.
What you will do See page
Set Up the Example Application 11-2
Create the Example Application 11-2
Add the Second Remote 1756-CNB Module to the I/O
Configuration
11-3
Add the Remote Analog I/O Module to the I/O
Configuration
11-5
Edit the Controller Tags 11-9
Modify the Ladder Program 11-10
Download the Program 11-10
Schedule the Network Using RSNetWorx for ControlNet 11-11
Test the Example Application 11-16

Allen-Bradley ControlLogix Specifications

General

Communication	EtherNet/IP, ControlNet, DeviceNet, DH+
I/O Capacity	Up to 128, 000 I/O points (varies by configuration)
Redundancy	Supported (with specific modules)
Programming Software	Rockwell Automation Studio 5000 Logix Designer
Operating Temperature	0°C to 60°C (32°F to 140°F)
Programming Languages	Ladder Logic, Function Block Diagram, Structured Text, Sequential Function Chart
Modularity	Yes
Certifications	UL, CE
Processor Type	Multiple options available, including standard, safety, and extreme environment processors
Power Supply	Multiple options available, including standard and redundant power supplies with various voltage ranges (e.g., 24V DC, 120/240V AC)