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MEMORY CARD AND BATTERY7.
7.7.1 Battery life
(1) Battery life of CPU module
The CPU module battery life differs depending on the CPU model.
The battery life for each CPU is shown below:
(2) Battery life of SRAM card
The battery life for the SRAM card is shown below:
As a guide, the battery life of the SRAM card is guaranteed for approximately 1.1
years on the condition that it is installed in a CPU module and the module is powered
on one hour a day.
CPU model name
Battery life [hr]
Guaranteed
value (MIN)
Actual value
(TYP)
After M9006
turns on
Q02CPU-A 50625 79024 120
Q02HCPU-A, Q06HCPU-A 2140 16200 120
*
The actual value indicates an average value; it may be different depending on the ambient
temperature.
POINT
(1) Use batteries within the time shown by the guaranteed value.
(2) If the battery may be used exceeding the time shown by the guaranteed
battery life value, perform the ROM operation to protect the program in case
that the battery dies at programmable controller power off, or back up the
program and data within the specified time indicated in the above table after
M9006 (battery low) turns on.
Battery model name
Battery life [hr]
Guaranteed
value (MIN)
Actual value
(TYP)
After M9006
turns on
Q2MEM-BAT
At storage 690 6336 8
At operation 11784 13872 8
*
The actual value indicates an average value; it may be different depending on the ambient
temperature.
The battery life at storage indicates the battery consumption time of the SRAM card when
it is installed into a programmable controller CPU with the power off, or when the SRAM
card is stored separately from a programmable controller CPU.
The battery life at operation is the battery consumption time of the SRAM card when it is
installed into a programmable controller CPU with the power on.
POINT
Note that the SRAM card consumes the battery even when it is installed in a CPU
module with the power on.
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