Installation Of The Battery For The Cpu Module - Mitsubishi MELSEC System Q Manual

The MELSEC System Q
3.4.3

Installation of the Battery for the CPU Module

The CPU is shipped with battery installed but with its connector disconnected to prevent dis-
charging and short circuits. Connect the battery before the CPU is used for the first time.
RESET L.CLR
With all other PLC CPUs the battery is installed at the bottom side.
To connect the battery open the cover of the battery compartment of the CPU. Check that the
battery is loaded correctly. Insert the battery connector into the connector pin at the case.
Make sure that with the CPUs Q02(H), Q06H, Q12(P)H and Q25(P)HCPU the connector is
inserted into the respective holder in the battery cover.
MELSEC System Q Beginners Manual
Battery
Connector
BAT.
CPU
Battery Q6BAT
Cover
The PLC CPUs of the MELSEC System Q are equipped
with a battery. During interruption of the power supply the
battery can hold the data of the program memory, the
built-in RAM and the clock for several thousand hours.
However, this time depends on the type of CPU.
The battery should be changed every 10 years.
The SRAM memor y cards have an own batter y
(Q2MEM-BAT) and are therefore independent from the
battery of the CPU.
The battery of a Q00J, Q00 and Q01CPU is
mounted behind the upper cover at the CPU
modules front.
Bottom of CPU module
Connector
The CPU Modules
Front of CPU module
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