Siemens SIMATIC ET 200pro - 7.4 Disconnecting module 400 V (ASM-400 V)

Commissioning
8.5 CPU memory reset
CPU 1516pro-2 PN (6ES7516-2PN00-0AB0)
Operating Instructions, 11/2019, A5E35873416-AC
85
Result after memory reset
The following table provides an overview of the contents of the memory objects after
memory reset.
Table 8- 4 Memory objects after memory reset
Memory object
Contents
Actual values of the data blocks, instance data blocks
Initialized
Bit memories, timers and counters
Initialized
Retentive tags of technology objects
(e.g. adjustment values of absolute encoders)
Retained
Entries in the diagnostics buffer Retained
IP address
Retained
Device name
Retained
Counter readings of the runtime meters
Retained
Time of day
Retained
8.5.2 Automatic memory reset
Possible causes of automatic memory reset
The CPU executes an automatic memory reset if an error occurs that prevents normal
further processing.
Causes of such errors are:
● 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.
● You remove or insert the SIMATIC memory card. The backed-up retentive data differs in
structure from the data in the configuration on the SIMATIC memory card.
8.5.3 Manual memory reset
Reason for manual memory reset
Memory reset is required to reset the CPU to the "original state".
CPU memory reset
Two options are available for performing a CPU memory reset:
● Using the mode selector
● Using STEP 7