
4.POWER SUPPLY CONNECTION B-63943EN/02
- 64 -
4.4.2 Batteries for PANEL i (3VDC)
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 PANEL i.
This battery has sufficient capacity to retain BIOS data for one year.
If the voltage of a battery drops, the following message is displayed
on the screen for a self-test performed immediately after power-on,
and the self-test pauses.
CMOS Battery Failure
**System Stopped by Temperature / Fan / Battery Alarm. Turn off the
Power. **
If this condition occurs, 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 Obtain a new lithium battery (A02B-0200-K102).
2 After power has been supplied for at least five seconds, turn off
the power to PANEL i. Remove the intelligent terminal from
the panel so that replacement work can be done from the rear of
the intelligent terminal.
3 Detach the connector of the lithium battery, and remove the
battery from the battery holder.
4 Attach the connector, and place the battery in the battery holder.
5 Install PANEL i again.
6 Turn on the power, and check that the BIOS data are maintained
(no error message is output at start-up).
NOTE
Between removing an old battery and inserting new
battery, no more than five minutes must be allowed
to elapse.
The BIOS data is usually preserved as long as the battery is replaced
according to the above procedure. If the data is lost, the following
error message is displayed when the power is turned on:
251 : System CMOS checksum bad – Default configuration used.
At this time, check whether the current BIOS settings of the PANEL i
have been changed from the default BIOS settings, and resume your
settings as required.