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Configuration Options with the ET 200M
3-9
Distributed I/O Device ET 200M
EWA-4NEB780600602-06
3.5 Redundancy with the IM 153-2
You can operate the IM 153-2 with redundancy
on S7 DP masters (e.g. S7-400H)
on S5 DP masters (e.g. S5-115H)
with software redundancy
in accordance with the relevant standard (Specification System Redundancy
(SR) V1.0, Dec. 2001 of the PROFIBUS user organization)
Prerequisites for the ET 200M
Installation on active bus modules
The bus module 6ES7 195-7HD10-0XA0 ensures a high level of availability for
the ET 200M and shorter switchover times in the case of redundancy.
2 IM 153-2 on bus module BM IM/IM
The rules given in Section 4.1.4 apply for the used active bus modules and
interface modules.
Possible with the IM 153-2/-2 FO as of 6ES7 153-2AA02/-2AB01
In redundant mode, the SYNC/FREEZE function should not be activated.
Note
If the SYNC/FREEZE function is activated in a redundant system, the user must
assume responsibility for the resulting behavior of the H system (e.g. at
switchovers).
In a redundant system you can only use the IM 153-2 on DP masters that
support the fail-safe parameter. The IM 153-2 will not start up on DP masters
that dont support this parameter, and the BF LED flashes.
Tip: You can tell from the DDB file of the DP master whether it supports the
fail-safe parameter or not.
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