Siemens SIMATIC ET 200M Operating Instructions Manual page 94

Commissioning
6.1 PROFIBUS DP
6.1.3 IM 153-2 / 153-2 FO start-up
Declaration
The term IM 153-2 applies in this chapter to: IM 153-2 and IM 153-2 FO
Declaration in the case of redundancy:
In the case of redundancy the 2 plugged IM 153-2 start up independently from each other.
The following flow chart takes into consideration the start-up of the IM 153-2 (a). When you
consider the IM 153-2 (b), then the following flow chart applies accordingly with the reverse
terms.
If, the IM 153-2AA02 / -2AB01 has inadvertently be plugged to the bus module BM IM/IM
6ES7195-7HD10-0XA0 or 6ES7195-7HD80-0XA0, then this IM cannot access the I/O
modules. Hence it is not possible to operate the IM in this redundant system (results in
station failure).
92
CAUTION
Operating Instructions, 12/2008, EWA-4NEB780600602-08
ET 200M