Automatic Memory Reset - Siemens Simatic S7-1500/ET 200MP System Manual

Result after memory reset
The following table provides an overview of the contents of the memory objects after
memory reset.
Table 11- 5 Memory objects after memory reset
Memory object
Actual values of the data blocks, instance data blocks
Bit memories, timers and counters
Retentive tags of technology objects
(e.g. adjustment values of absolute encoders)
Diagnostics buffer entries
IP address
Device name
Counter readings of the runtime meters
Time of day
11.6.1

Automatic memory reset

Possible cause of automatic memory reset
The CPU executes an automatic memory reset if an error occurs that prevents normal
further processing.
Causes for such errors can be:
● User program is too large, and can't be completely loaded into work memory.
● The project data on the SIMATIC memory card are damaged, for example because a file
was deleted.
● If you remove or insert the SIMATIC memory card and the backed-up retentive data
differs in structure from that of the configuration on the SIMATIC memory card.
Automation system
System Manual, 12/2017, A5E03461182-AE
Contents
Initialized
Initialized
Retained
Retained
Retained
Retained
Retained
Retained
Commissioning
11.6 CPU memory reset
241