Siemens SIMOTION P320-4 E Commissioning And Hardware Installation Manual page 120

Service and maintenance
10.3 Installing/removing SIMOTION P320-4 components
Preparation
Note
The configuration data and contents of the SRAM in the device are buffered for at least 30
seconds when the battery is replaced.
Preparation – Making a note of the BIOS settings
1. Note specific BIOS setup settings if changes have been made.
2. Isolate the device from power supply and disconnect all connecting cables.
Preparation – save SRAM data
As a result of replacing the battery (SRAM not backed up during this time), data loss may occur
in the SRAM of the SIMOTION P320‑4.
1. To avoid a lengthy repeat of the commissioning procedure, ensure that a backup of the
non-volatile data is available before changing the battery. This is performed, for example,
automatically when Windows is shutdown correctly.
2. Correctly close the SIMOTION P320‑4 or Windows via:
Windows taskbar: Start > Shut down.
Note
If Windows was not shut down properly before backup battery replacement, loss of bit
values in SRAM memory cells during battery replacement cannot be detected reliably.
SIMOTION P320-4 must then undergo a memory reset.
Tools
You will need a T10 screwdriver to open the battery compartment.
Replacing the battery
NOTICE
Switch off the device before replacing the battery
The battery can also be exchanged when the device is operating. However, we recommend
switching off the device beforehand.
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SIMOTION P320-4 E / P320-4 S
Commissioning and Hardware Installation Manual, 01/2015