472
22 FX3U-32BL (Battery)
22.5 Battery Replacement
FX
3U
Series Programmable Controllers
User’s Manual - Hardware Edition
22.5
Battery Replacement
Before replacing the battery
Step 4 of the replacement procedure (below), must be performed within 20 seconds after step 3, or
the memory content could be lost.
1
Turn the power OFF.
2
Remove the battery cover.
Slightly lift the "B" side of the battery cover ("A").
Grasp the cover ("A") between your fingers and remove it.
3
Remove the old battery.
Extract the old battery from the battery holder ("C"), and
disconnect the battery connector ("D").
4
Install the new battery.
Connect the battery connector ("D") to the new battery, and
insert the battery into the battery holder ("C").
5
Attach the battery cover ("A").
Caution
1) Battery replacement requires users to verify data integrity such as the PLC program (when a memory
cassette is not attached), latched (battery backed) device values and RTC values. Before switching the
PLC to RUN, ensure the safety of the operation.
2) If the battery backed data becomes unstable, clear the latched (battery backed) devices, and transfer the
data again. Set the RTC and default values again if necessary.
→
For the clear method of keeping devices, refer to the programming manual.
22.6
Battery Related Precautions
1. The FX
3U
series uses a different battery type than those used for the FX
2N
(F2-40BL) and
FX
2NC
(FX
2NC
-32BL) series.
• Not for use with the FX
3U
series.
2. When performing battery-free operation, the clock stops when the main unit power is turned
OFF.
A
B
Battery
Summary of Contents for FX2-16E series
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Page 8: ... 6 Safety Precautions Read these precautions before use MEMO ...
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