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16 MAINTENANCE AND INSPECTION
16.2 Periodic Inspection
Battery replacement
When the battery voltage is reduced, replace it following the procedure below.
Note the following before replacement work.
• Turn on the power supply of the programmable controller for more than 10 seconds.
• Back up the data of the CPU module with the engineering tool.
Even with the battery removed, the built-in capacitor holds the data of the memory for the power interruption
time (20 sec). Battery replacement steps 5 and 6 must be completed within the power interruption time (20
sec). When the time taken for battery replacement is longer than the power interruption time, the data of the
memory may be lost.
1.
Turn the power supply on.
2.
Back up the data of the CPU module with the engineering tool.
3.
Turn the power supply off.
4.
Remove the cover.
• FX5U CPU module
Remove the expansion board connector cover (A in the right
figure). When an expansion board is installed, remove it.
• FX5UC CPU module
Remove the battery cover (A in the right figure).
A
2
5
A
2
5
Summary of Contents for MELSEC iQ-F FX5UC Series
Page 2: ......
Page 142: ...140 8 CONNECTOR CONVERSION MODULE PERFORMANCE SPECIFICATIONS 8 2 External Dimensions MEMO ...
Page 144: ...142 9 SD MEMORY CARD PERFORMANCE SPECIFICATIONS 9 2 Formatting MEMO ...
Page 146: ...144 10 BATTERY PERFORMANCE SPECIFICATIONS 10 2 Battery Life MEMO ...
Page 277: ...I 275 MEMO ...
Page 281: ......