
2. 15i SERIES HARDWARE
B–63785EN/01
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Part programs, offset data, and system parameters are stored in the CMOS
memory of the control unit. The power to the CMOS memory is backed
up by the lithium battery installed on the front panel of the control unit.
Therefore, data is not lost if the main power is turned off. The battery is
factory–installed in the control unit.
If the battery voltage drops, “BAT” blinks on the LCD screen, and the
battery alarm signal is output to the PMC. When this occurs, the battery
should be replaced as soon as possible. Replace the battery within one
week. Otherwise, the contents of memory will be lost. However, the
actual remaining battery life depends on the system configuration. Note
that the memory backup function is disabled when the battery voltage
drops. Turning on the power to the control unit causes the output of a
system alarm [screen display: RAM parity error (low battery)], because
memory data has been lost. In this case, replace the battery, clear the
memory, then reenter the data.
Before replacing the memory backup battery, ensure that the power to the
control unit is turned off.
Either of the following two types of batteries may be used:
D Lithium battery installed on the main board of the Series 15i/150i
D Commercially available alkaline dry cells (D) contained in an external
battery case
Replacement procedure
(1) Obtain a new lithium battery (A02B–0200–K102).
(2) Turn on the power to the control unit, then wait about 30 seconds.
(3) Turn off the power to the control unit.
(4) Remove the battery from the main board.
First, unlatch the battery, then remove it from the battery holder and
detach its connector.
The battery holder is on the top of the faceplate (top of the memory
card connector) on the main board.
(5) Insert a new battery into the battery holder and attach the connector.
Ensure that the battery is latched firmly.
2.10
REPLACING THE
BATTERY
2.10.1
Replacing the Lithium
Battery