Mitsubishi Electric Q26UD(E)HCPU User Manual page 259

(3) Replacement procedure of the Q7BAT battery
Replacing battery
Backup the program and the data.
Turn off the programmable controller power supply.
Remove the CPU module from the
base unit.
Remove the battery holder at the
bottom of the CPU module.
Disconnect the battery connector, and pull
out the Q6BAT/Q7BAT being used.
Confirm
the type of the old
battery.
Q6BAT to be
replaced by Q7BAT.
Connect the Q7BAT to the battery
connector of the CPU module, and set it into
the connector holder of the battery holder.
Set the battery holder to the
CPU module.
Install the CPU module into the
base unit.
Turn on the programmable controller power supply.
Monitor
SM51 to verify
on/off.
ON
Monitor
SD52 to check if bit 0 is
ON.
Bit 0 is on.
Failure of Q7BAT battery
Backup time
3 minutes
*1:
When disconnecting the battery
*1
connector, hold the connector part being
careful not to damage the battery cable.
Q7BAT to be
replaced by
Disengage the catch on one side of
Q7BAT.
the battery holder to disassemble the holder
into two, and remove the Q7BAT.
Insert the new Q7BAT into the holder in the
correct direction, and reassemble the battery
holder so that the battery cable comes out
of the hole in the holder connection.
(Push the holder parts in until they click.)
Connector
CPU module
Battery holder
OFF
Bit 0 is OFF.
CHAPTER 13 MAINTENANCE AND INSPECTION
Battery
Q7BAT
Connector
stopper
Completed
13
Battery holder
Latch
Battery holder
257