Procedures For Replacing Battery - Mitsubishi FX3U SERIES User Manual

FX Series Programmable Controllers
3U
User's Manual - Hardware Edition
3. Capacitive load
Capacitive loads can generate rush current 20 to 40 times the stationary current. Make sure that the rush
current does not exceed the current corresponding to the maximum specified resistance load. Capacitive
loads such as capacitors may be present in electronic circuit loads including inverters.
*About the maximum load specifications of the resistance load, refer to the specification for each model.
→ For specifications on the input/output powered extension units, refer to Chapter 15.

14.4.4 Procedures for replacing battery

When the battery voltage drops while the PLC power is on, the "BATT" LED on the panel is lit in red, and
M8005 and M8006 (latch) are turned on.
The memory can be retained for about one month after the lamps turn on. However, the operators may not
immediately find the lamps to be on. Prepare a new battery promptly, and replace the battery with the new
one.
→ For details on the specifications and functions of the battery, refer to Chapter 22 "FX3U-32BL
14 Test Operation, Adjustment, Maintenance and Troubleshooting
→ For specifications on the main unit, refer to Subsection 12.2.1.
→ For specifications on the input/output extension blocks, refer to Chapter 16.
→ For specifications on the terminal block, refer to Subsection 20.7.1.
14.4 Maintenance and Periodic Inspection
(Battery)"
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