Mitsubishi MELSEC-A A2USHCPU-S1 User Manual

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10. MAINTENANCE AND INSPECTION
10.3.2 Battery replacement procedure
Replace the battery according to the following procedure when life of the battery is over.
Even when the battery is removed memory is backed up by the capacitor for a while.
However, if replacement takes longer than the guaranteed value shown in Table 10.4, the
content of the memory may be erased, so replace the battery quickly.
Battery replacement
Turn OFF the programmable
controller power supply.
Open the front cover of the
CPU module.
Pull the battery in use out of the
holder. Disconnect the cord from
the cord holder and disconnect
the lead connector from the
connector.
Close the front cover of the
CPU module.
Turn ON the programmable
controller power supply.
Monitor the
M9006 with a peripheral
device and confirm the
ON/OFF status.
Battery is defective.
Complete
A6BAT
Battery
connector
OFF
ON
Back up the program, data.
Insert the new battery into the
holder in the correct direction
and connect the lead connector
to the connector. (Place the cord
into cord holder.)
CPU module
Table 10.4 Period backed up by the capacitor
Period backed up by the capacitor [min]
Guaranteed value (MIN) Actual value (TYP)
515

Mitsubishi MELSEC-A A2USHCPU-S1 Specifications

General

Brand	Mitsubishi
Model	MELSEC-A A2USHCPU-S1
Category	Controller
Language	English