Power Failure / Power Fail - Siemens SIMOTION P320-4 E Commissioning And Hardware Installation Manual

11.4

Power failure / POWER FAIL

In the event of a power failure, the consequences described below must be considered
separately.
SIMOTION P Runtime
If a power loss occurs, the POWER FAIL functionality of SIMOTION P Runtime:
● Will correctly finish SIMOTION P Runtime and
● The user data marked as retain is saved in the non-volatile memory of the
SIMOTION P320‑4
The next time SIMOTION P Runtime is ramped up, the backed-up user data is available again.
This means that SIMOTION P Runtime is ready to run immediately without loss of data.
Note
Saving of the user data in the SRAM of the SIMOTION P320‑4 in case of power failure is only
guaranteed if the SIMOTION P320‑4 is operated within its defined specifications.
The message POWER FAIL is displayed if the supply voltage for SIMOTION P320‑4 falls below
20.4 V. In this case, check the voltages in the external power supply:
1. Check if the input voltage (mains voltage) for the external power supply has the rated value.
2. If so, check the output voltage of the external power supply. If the voltage is not within the
limits for the supply voltage of the SIMOTION P320‑4 (19.2 ... 28.8 V DC), then change
the external power supply.
Windows
If the SIMOTION P320-4 is shut down during operation, the Windows installation may be
affected.
The consistency of Windows applications cannot be guaranteed during a power failure.
In these cases, we strongly recommend use of an EWF or a UPS system.
Note
Applies only for SIMOTION P320-4 E
SIMOTION P320-E is delivered with deactivated EWF (Enhanced Write Filter).
After the device is commissioned, activate the EWF for drive C: because this ensures:
● An extended service life for the CFast card
● No data loss when switching the device off via the line side switch or through disconnection
from the power supply
SIMOTION P320-4 E / P320-4 S
Commissioning and Hardware Installation Manual, 01/2015
Alarm, error and system messages
11.4 Power failure / POWER FAIL
131