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6. Daily Maintenance and Periodic Inspection and Maintenance
6.3 Replacement Methods
III-42
6.3.2 Durable Parts
(1) Control unit battery
All data, such as the parameters and machining programs that need to be backed up when the power is
turned OFF, are saved by a lithium battery installed in the control unit's battery holder.
Battery
With ER6 connector (Toshiba with Mitsubishi specifications)
Initial battery voltage
3.6V
Voltage at which voltage
drop is detected
2.8V (Battery voltage drop caution alarm screen display)
2.6V (Battery voltage drop warning alarm screen display +
control section LED display)
Battery cumulative data
holding time
45,000 hours (At room temperature. The life will be shorter if the
temperature is high.)
Battery life
Approx. 5 years (from date of battery manufacture)
Discharge current
40µA or less
(Note) Replace the battery when the battery voltage drop caution alarm appears on the NC screen. The
internal data could be damaged if the battery voltage drop warning alarm appears.
(a) Replacement procedures
Always replace the battery with the control section (machine) power turned OFF.
Complete the replacement within 30 minutes after turning the power OFF. (If the battery is not connected
within 30 minutes, the data being backed up will be destroyed.)
1) Turn the control section (machine) power OFF.
2) Open the electric cabinet door, and confirm that the control unit LED, 7-segment display, etc., are all
OFF.
3) If an extension unit is mounted, and a cable is connected to the front of the control section,
disconnect the cable.
4) Open the front cover of the control section by pulling on the right side of the door (the side without
fixing screws).
5) Remove the battery from the battery holder.
6) Pull the connector connected to the battery out from the BAT connector on the control section
HR081/HR082/HR083 power supply PCB.
7) Replace the battery with the new one. Insert the connector connected to the new battery into the
BAT connector on the control section HR081/HR082/HR083 PCB. Pay attention to the connector
orientation, being careful not to insert backwards.
8) Fit the battery into the battery holder.
9) Close the front cover of the control section. At this time, confirm that the cover is closed by listening
for the "click" sound when the latch catches.
10) Close the door of the electric cabinet.
HR081/082/HR083
BAT connector
Connection connector
Battery holder
Battery
Front cover
Open the front cover
of the control section.
Control section