Mitsubishi Electric MELSEC FX3U - Fx 3 U;Fx 3 Uc; RUN LED [Lit or Unlit]; BATT (BAT) LED [Lit or Unlit]; ALM LED [Lit or Unlit] [FX 3 G ]

933
FX3G/FX3U/FX3UC Series Programmable Controllers
Programming Manual - Basic & Applied Instruction Edition
38 Error Check Method and Error Code List
38.1 States and Colors of LEDs PLC Operation Status
31
FNC275-FNC279 Data Transfer 3
32
FNC280-FNC289 High Speed Processing 2
33
FNC290-FNC299 Extension File Register
34
FNC300-FNC305 FX
3U
-CF-ADP
35
SFC•STL Programming
36
Interrupt Function
37
Special Device
38
Error Code
A
Version Up Information
B
Execution Times
38.1.2 RUN LED [lit or unlit] [FX3G/FX3U/FX3UC]
38.1.3 BATT (BAT) LED [lit or unlit] [FX3U/FX3UC]
38.1.4 ALM LED [lit or unlit] [FX3G]
This LED is valid when the optional battery is installed and the battery mode is selected using a parameter.
LED status PLC status Action
Lit Sequence program is executing. The PLC operation status is indicated.
This LED is not lit depending on the ERROR (ERR) LED
status. (Refer to Subsection 38.1.4.)
Unlit Sequence program is stopped.
LED status PLC status Action
Lit The battery voltage is low.
Replace the battery as soon as possible.
(Refer to FX
3U/FX3UC Hardware edition.)
Unlit
The battery voltage exceeds the value set in
D8006.
The battery is normal.
LED status PLC status Action
Lit The battery voltage is low.
Replace the battery as soon as possible.
(Refer to FX
3U/FX3UC Hardware edition.)
Unlit
The battery voltage exceeds the value set in
D8006.
The battery is normal.