Doesn't this mean that I do not need to define the retentative areas in the Hardware config?
"Retentive Memory" Tab
Meaning of the tab for S7-300:
In the "Retentive Memory" tab, you can specify which memory areas are to be retained following power failure and after a transition from STOP to RUN, even without a battery backup (in the backup memory of
the CPU). If a backup battery is inserted, data blocks are always retentive.
Meaning of the tab for S7-400:
Requirement for retentivity is a backup battery being inserted. In the "Retentive Memory" tab you can set which addresses (bit memory, S7 timers, S7 counters) are to be retained following a warm restart; data blocks are always retentive. With a hot restart all address areas and data blocks are retentive.
The following items can be retentive:
Number of memory bytes from MB0
Number of S7 timers from T0 (not relevant for M7)
Number of S7 counters from C0 (not relevant for M7)
Only relevant for S7-300 (without battery backup):
Data areas of data blocks, so-called retentive areas.
Note
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