Allen-Bradley ControlLogix User Manual

1756-6.5.3 - December 1999
Chapter 9
PLC-5C to PLC-5C Unscheduled Messaging
Over Two ControlNet Networks
About the Example Application
In this example you establish communications between two PLC-5C
processors on different ControlNet networks. Two 1756-CNB modules in
the same ControlLogix chassis are used to bridge the networks. The
1756-CNB modules are in slots 1 and 3 and are configured as nodes 1 and 6,
respectively. The application sends an unscheduled PLC-5C Typed Write
message from the PLC-5C processor on ControlNet network #1 (node 11)
to the PLC-5C processor on ControlNet network #2 (node 16).
Set Up the Example
Application
Change your system configuration to that shown below:
• Verify that the node addresses for the 1756-CNB modules are 1 and 6 as
shown.
• Verify that the ControlNet node addresses for the PLC-5C processors are
11 and 16 as shown.
What you will do See page
Set Up the Example Application 9-1
Create the Example Application 9-2
Create the Ladder Program 9-3
Download the Program 9-5
Test the Example Application 9-6
ControlNet Network #1
1756-CNB
(Node 1)
PLC-5C
ControlLogix Chassis
PC with
1784-KTCX15
Interface
Message
Slot 1 3
(Node 11)
1756-CNB
(Node 6)
PLC-5C
(Node 16)
Message
ControlNet Network #2
1771 I/O Chassis
1771 I/O Chassis

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)