Reconfiguring the BIOS Setup
The battery change does not take longer than 30 seconds with the device switched off, the
BIOS settings are retained.
The SRAM and CMOS data of the SIMOTION P320‑4 is certainly deleted only when the battery
is disconnected for a longer period of time (more than 15 minutes) and in the switched-off state.
The BIOS Setup must be performed again if the data has been cleared. The CMOS data must
be restored to the default values; the date, time, and any special settings must be set again.
Note
Exception:
If the CMOS data has been saved previously with a USER profile, only the date and the time
may be set again. All other settings will be made automatically. This means that the default
values may not be loaded in this special case.
11.5
Special power-up situations
11.5.1
Special startup situations overview
The special power-up situations are described in the following:
● Non-volatile data and SRAM handling (Page 189)
● After new installation / update of the SIMOTION P Kernel (Page 191)
● After importing a backup copy (Page 191)
● After a power failure/POWER FAIL (Page 192)
Requirements
You are familiar with the user storage concept of the non-volatile data on the
SIMOTION P320‑4.
11.5.2
Non-volatile data and SRAM handling
Non-volatile data, also called retain data, is retained when SIMOTION P320‑4 suffers a power
failure. The data is buffered with the battery in the static memory area (SRAM) on the
SIMOTION P320‑4.
SRAM handling
If the serial number of the SIMOTION P320‑4 is known:
The serial number of the SIMOTION P320‑4 corresponds to the one that was last saved on
the SIMOTION P320‑4.
Service and maintenance
11.5 Special power-up situations
SIMOTION P320-4 E / P320-4 S
Commissioning and Hardware Installation Manual, 11/2016
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