Battery Replacement Procedure - Mitsubishi Electric MELCEC Q Series User Manual

7. MEMORY CARD AND BATTERY
7.7.2

Battery replacement procedure

(1)
Battery replacement
Turn off the programmable
controller power supply.
Open the cover of QCPU-A.
Remove the current battery
from the holder.
Insert the new battery in the proper
orientation and connect the lead
connector to the connector.
Close the cover of QCPU-A.
Turn on the programmable
controller power supply.
Monitor
M9006 to check whether
it turns ON or OFF.
ON
The battery for the memory card is defective.
Refer to Section 7.7.2 (2).
CPU module battery replacement procedure
Replace the battery of a CPU module by following the procedure below when the life
of the battery is over.
Before removing the battery, keep the CPU module powered on for 10 minutes or
more.
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 the
following table, the content of the memory may be erased, so replace the battery
quickly.
OFF
Side of CPU
Bottom side Battery
7 - 11
Backup time of the capacitor
Capacitor backup time [min.]
3
Front
side
Connector
Completion