
B-63944EN/02 MAINTENANCE 1.ROUTINE MAINTENANCE
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1.3.3 Battery in the CNC Display Unit with PC Functions (3 VDC)
A lithium battery is used to back up BIOS data in the CNC display
unit with PC functions. This battery is factory-set in the CNC
display unit with PC functions. This battery has sufficient capacity
to retain BIOS data for one year.
When the battery voltage becomes low, the following message
appears on the self test screen displayed at turn-on, and the self test
pauses.
CMOS Battery Failure
If this message appears, replace the battery as soon as possible (within
one week). FANUC recommends that the battery be replaced once
per year regardless of whether a battery alarm is issued.
- Replacing the battery
(1) To guard against the possible loss or destruction of BIOS
parameters, write down the BIOS parameter values.
(2) Obtain a new lithium battery (A02B-0200-K102).
(3) After power has been supplied for at least five seconds, turn off
the power to CNC display unit with PC functions. Remove the
intelligent terminal from the panel so that replacement work can
be done from the rear of the intelligent terminal.
(4) Detach the connector of the lithium battery, and remove the
battery from the battery holder.
(5) Attach the connector, and place the battery in the battery holder.
(6) Install CNC display unit with PC functions again.
(7) Turn on the power, and check that the BIOS parameters are
maintained (BIOS setup is not activated forcibly).
Between removing an old battery and inserting new battery, no more
than five minutes must be allowed to elapse.
When replacing the battery of the PANEL i, follow the steps above.