Diagnostic Address

STEP? specifies a default address for diagnostics here. You can change this address.
The failure or return of a DP slave is reported to the master via this diagnostic address. The CPU then starts the OB86 "Rack/DP Slave Failure."
You can also use this address with SFC 13 DPNRM_DG to obtain the complete diagnostic information from the DP slave and include it in the CPU program.