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Publication 20D-UM002C-EN-P - November 2003
12-12 DriveLogix Back-Up on DeviceNet
Reading Back-up Status
You can read the back-up status of the DeviceNet scanner with a single rung
of ladder logic. The back-up state is useful for debugging or more
sophisticated back-up schemes. The message in this rung uses the SINT data
type.
Figure 11.7 shows the rung you can use to read the back-up state.
Figure 11.7
Table 11.1 describes the possible values this message may return when reading
the back-up status of the DeviceNet scanner.
Rung 6 message configuration and communication tabs
Table 11.2
If the message reads
this value:
the back-up state of the DeviceNet scanner is:
0 No back-up scanner detected
1 Primary scanner forcing IDLE (back-up in RUN but primary in
IDLE)