Rockwell-automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM Manual de usuario Pagina 156

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Publication AG-UM008C-EN-P - February 2005
4-18 Configuring SLC 5/03, 5/04, and 5/05 Processors
Configuring a
Message-based Mode DF1
Half-Duplex
Master Station
Choose message-based communication mode if you want to use MSG
instructions in user programming to communicate with one station at
a time. If your application uses satellite transmission or public
switched telephone network transmission, consider choosing
message-based. Communication to a slave station can be initiated on
an as-needed basis.
Message-based communication should also be used in redundant SLC
master station systems implemented with the 1746-BSN backup
communication module.
With message-based mode, you do not have an active node file that
you can use to monitor station status. Also, you cannot implement
slave station-to-slave station messaging or slave programming.
To configure the processor for a master station using message-based
communication, place the processor in program mode and follow the
steps below using your programming software:
1. To bring up the Channel
Configuration interface,
double-click on the Channel
Configuration icon.
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