User manual

1 Publication CNET-UM001C-EN-P - November 2005
Chapter 6
Peer-to-Peer Messaging
Use This Chapter
This chapter describes how to use MSG instructions to send data to and
receive data from other modules on a ControlNet network.
There are different methods of communicating with other controllers:
Read this
chapter for:
• 1756-CN2, 1756-CN2R modules
• 1756-CNB, 1756-CNBR modules
• 1769-L32C, 1769-L35CR controllers
• 1784-PCIC, 1784-PCICS,
1784-PKTCS cards
• 1788-CNx cards
For This Information See Page
Set Up the Hardware 6-2
Guidelines for MSG Instructions 6-4
Determine Connections for Messages 6-5
Enter Message Logic 6-6
Configure a Message Instruction 6-7
Access Logix Data from a PLC-5 or SLC Processor 6-14
Stagger the Messages 6-16
Route PLC-5 Messages Between ControlNet Networks 6-16
If the Data Then See Chapter
Needs regular, fast delivery at an interval that you specify Produce and consume a tag Produce and Consume
Tags
(Interlock Controllers)
• is sent when a specific condition occurs in your
application
• is sent at a slower rate than required by produced and
consumed tags
• is sent to devices that only communicate with
unscheduled data
Execute a message (MSG) instruction Peer-to-Peer
Messaging