Allen-Bradley ControlLogix - Chapter 3: Logix5550 to Logix5550 Unscheduled Messaging

1756-6.5.3 - December 1999
Chapter 3
Logix5550 to Logix5550 Controller:
Unscheduled Messaging
About the Example Application
This example application sends an unscheduled message from one
Logix5550 controller to another Logix5550 controller. Both controllers are
on the same ControlNet but in different chassis. In both chassis the
controller is in slot 0 and the 1756-CNB module is in slot 1. The 1756-CNB
modules are configured at node addresses 1 and 6, respectively. A Timer
provides the test data for the message.
Set Up the Example Application
Change your system configuration to that shown below:
What you will do See page
Set Up the Example Application 3-1
Create the Example Application 3-2
Create the Controller Tags for the Write Message Program 3-3
Create the Write Message Ladder Program 3-4
Download and Run the Program 3-6
Test the Example Application 3-6
Create the Controller Tags for the Test Program 3-7
Download the Test Program 3-9
Test the Communications 3-10
ControlNet Network
Logix5550
1756-CNB
(Node 1)
1756-CNB
(Node 6)
Logix5550
Left
Chassis
Right
Chassis
PC with
1784-KTCX15
Interface
Message
Slot 0 1
Slot 0 1