Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 105)

Publication AG-UM008C-EN-P - February 2005
Configuring MicroLogix 1100/1200/1500 Controllers 3-37
Processor-to-Processor
A processor-to-processor message can be the following types:
•
In a general point-to-multipoint configuration, the messaging
would be between slave stations; the master station
automatically routes the message.
•
In a radio modem point-to-multipoint or a point-to-point
configuration, the messaging would be between the two
connected peer devices.
The configuration of the network (point-to-multipoint vs.
point-to-point) and the configuration of the station (master, slave, or
peer) does not affect how you configure an MSG instruction. That is,
an MSG instruction being sent between two MicroLogix slave stations
is configured the same as an MSG instruction between two MicroLogix
processors connected point-to-point, which is configured the same as
an MSG instruction between a MicroLogix master station and a
MicroLogix slave station. See Example MSG Control Blocks starting on
page 3-42.
Considerations When Configuring MSG Control Blocks
Keep the following considerations in mind when configuring
messages between a MicroLogix 1100/1200/1500 controller and other
processors.
Master Station routes MSG to
Slave Station 2
Modem Modem
MSG from Slave Station 1 to
Slave Station 2
Slave
Station 1 Slave
Station 2
Master
Station
Modem
Station 1
Station 2
MSG
Modem Modem