Mitsubishi Electric MELSEC iQ-R Series Configuration Manual page 146

Replacement procedure from the Q6BAT to the Q7BAT-SET
Replace it by the following procedure.
(1)
(2)
(3)
Replacement procedure for the Q7BAT
(3)
(4)
(5)
(6)
6 MAINTENANCE AND INSPECTION
144
6.2 Periodic Inspection
(1)
(2)
1.
Back up the program and data.
2.
Power off the programmable controller.
3.
Remove the CPU module from the base unit.
4.
Open the battery cover located on the bottom of the CPU
module.
5.
Disconnect the connector plug of the Q6BAT from the jack of the
CPU module.
6.
Securely insert the connector plug of the Q7BAT-SET to the jack
of the CPU module.
7.
Set the connector (1) into the connector holder (2) of the battery
holder.
8.
Attach the Q7BAT-SET (3) to the CPU module.
1.
Back up the program and data.
2.
Power off the programmable controller.
3.
Remove the CPU module from the base unit.
4.
Remove the battery holder.
5.
Disconnect the connector plug of the Q7BAT from the jack of the
CPU module. When disconnecting the connector, hold the
connector part so that the cables are not damaged.
6.
Separate the holder (2) into two pieces by disengaging the
latches (1) on both sides of the holder, and remove the Q7BAT
(3).
7.
Set the new Q7BAT to the holder in the right direction, checking
the positive/negative terminal markings. Connect the holder back
into one piece, placing the battery cable into the hole at the
connection part. (Press the holder pieces until they click.)
8.
Securely insert the connector plug (4) of the Q7BAT to the jack of
the CPU module. Set the connector to the connector holder (5)
on the cover.
9.
Attach the battery holder (6) to the CPU module.
10.
Mount the CPU module back on the base unit.
11.
Power on the programmable controller.
12.
Using the engineering tool, check that SM51 (Battery low latch) is
off.
If SM51 is off, the battery has been replaced successfully.
If SM51 is on, the battery may not be installed properly. Repeat the
procedure from step 2. If SM51 remains on, the possible cause is a
hardware failure of the battery. Perform the procedure with a different
battery.