Siemens SIMOTION P320-4 E Commissioning And Hardware Installation Manual page 114

Commissioning (software)
9.11 Switching off
SIMOTION P320-4
If Windows is shut down properly, SIMOTION P320-4 will also be shut down properly.
If SIMOTION P320-4 is switched off before Windows is shut down properly, the POWER FAIL
functionality causes the following events to occur
● SIMOTION P320-4 is stopped correctly and
● the SIMOTION P retain variables are saved in the non-volatile memory of the
SIMOTION P320‑4.
When SIMOTION P320-4 powers up again, the backed-up user data will be available once
more.
This means that SIMOTION P320-4 is ready to run immediately without loss of data, provided
that the Windows installation was not damaged by the switch-off.
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SIMOTION P320-4 E / P320-4 S
Commissioning and Hardware Installation Manual, 01/2015