Rockwell Automation DAG6.5.8 APPLICATION GUIDE SCADA SYSTEM - Manual (Page 87)

Publication AG-UM008C-EN-P - February 2005
Configuring MicroLogix 1100/1200/1500 Controllers 3-19
If you are using RSLogix 500 version 6.10.10 or higher, you can view
the active node table by clicking on Processor Status and then
selecting the tab for the DF1 Master channel.
Figure 3.4 Example Active Node Table
At powerup or after reconfiguration, the master station assumes that
all slave stations are inactive. A station is shown active only after it
responds to a poll packet.
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.
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.