Siemens SIMATIC PANEL PC 877 Operating Instructions Manual page 140

Maintenance and service
12.4 Installing and removing hardware components
Preparation
Note
The configuration data of the device are deleted when the battery is replaced.
5. Note down the current settings of the BIOS Setup.
6. Disconnect the device from mains and unplug all cables.
Replacing the battery
Follow the steps outlined below:
Steps for replacing the battery
1
2
3
4
Reconfiguring the BIOS Setup
When a battery is exchanged, the configuration data of the device are lost and must be
reentered in the BIOS setup.
12-26
A list in which you can note down this information is found in the BIOS manual.
Open the device.
Disconnect the plug (1) and take the
battery (2) out of the retainer.
Place a new battery in the holder and
reconnect the battery plug.
Close the device.
Operating instructions, Release 07/2006, A5E00877780-01
SIMATIC Panel PC 877