Siemens Simatic ET200pro

Commissioning
7.5 CPU memory reset
CPU 1516pro-2 PN (6ES7516-2PN00-0AB0)
82 Operating Instructions, 09/2016, A5E35873416-AA
7.5.2
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.
7.5.3
Manual memory reset
Reason for manual memory reset
Memory reset is required to reset the CPU to its "original state".
CPU memory reset
There are the following options for performing a memory reset of the CPU:
● Using the mode selector
● Using STEP 7
Procedure using the mode selector
Note
Memory reset ↔ Reset to factory settings
The procedure described below also corresponds to the procedure for resetting to factory
settings:
•
Selector operation with inserted SIMATIC memory card: CPU executes a memory reset
•
Selector operation without inserted SIMATIC mem
ory card: CPU executes reset to factory
settings