Automatic Memory Reset; Manual Memory Reset - Siemens SIMATIC S7-1500 Automation System System Manual

8.5.1

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
● If the SIMATIC memory card is removed during POWER OFF, and reinserted with a new
● When a SIMATIC memory card is removed or inserted while the CPU is switched on.
8.5.2

Manual memory reset

Reason for manual memory reset
Memory reset is required to reset the CPU to its "original state".
Options for performing memory reset on a CPU
There are three options for performing a memory reset on the CPU:
● Using the operating mode switch
● Using the display
● Using STEP 7
S7-1500 Automation System
System Manual, 01/2013, A5E03461182-01
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user program.
Commissioning
8.5 Memory reset
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