Hello,

how do you recommend troubleshooting this fault (log attached).

it's a redundant S7 400 setup, connected via profibus to about 6 ET200M.

before going into RUN mode: the below are the errors:

1. Parameter assignment error in address parameters for submodule
   Parameter: slot
   Input address:   8187 of the module with parameter assignment errors
   Error type: configurable slot empty
   Operating mode: STOP (internal)
   Event occurred in the master CPU in rack 0
   External error, Incoming event
2. New startup in STOP mode
3. SYNC submodule missing
4. Power on backed up
5. Power Failure

appreciate some guidance