Battery Replacement - Mitsubishi Electric Melsec Q Series User Manual

4
SETTINGS AND PROCEDURE TO OPERATION

4.8.3 Battery replacement

This section explains how to replace the QJ71MES96 MES interface module battery.
The battery is used for file protection.
If the voltage of the battery has dropped, the battery must be replaced.
(1) Checking the module for a battery voltage drop
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- 21 4.8 Battery
4.8.3 Battery replacement
1 Check for a battery voltage drop in the Battery status area (Buffer memory
address: 7).
2 The following results from battery errors.
• "1 (ON)" is written to the Battery status area (Buffer memory address: 7).
• The ERR. LED is turned ON, and ERR. LED status (X10) and Other error
(X1C) are turned ON.
The file contents will not be erased immediately after the battery error
occurrence, but may be erased if the battery error is not recognized.
3 Finish the battery replacement in the total power failure compensation time since
the Battery status area is turned ON is within the specified time.
Figure 4.18 Checking for a battery voltage drop
Y100 is turned ON
at battery error.