Mitsubishi Electric MR-MQ100 User Manual page 106

6 INSPECTION AND MAINTENANCE
POINT
(1) Do not use any battery having exceeded its guaranteed life.
(2) When the battery hours (total power failure time) may exceed its guaranteed
value, take the following measure.
• Perform ROM operation to protect a program even if the battery dies at the
Motion controller power-OFF.
• If SM51 turns on, the contents for the data (Refer to Section 6.5.) of SRAM
built-in Motion controller cannot be guaranteed.
It is recommended to back-up the data periodically.
(3) When the total power failure time exceeds its guaranteed value, and SM51,
SM52, SM58 and SM59 turns on, immediately change the battery. Even if the
alarm has not yet occurred, it is recommended to replace the battery
periodically according to operating conditions.
(4) Even when not connect to a motion controller, self-discharge influences the life
of the battery. The battery should be exchanged approximately every 4 or 5
years even if the total power failure time is within the guaranteed value.
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