Troubleshooting; Troubleshooting With The Leds - Mitsubishi Electric MELSEC iQ-F FX5 User Manual

1.10

Troubleshooting

This section describes errors that may occur in the use of an analog input module and those troubleshooting.

Troubleshooting with the LEDs

Check the state of the LEDs to narrow down the possible causes of the trouble. This step is the first diagnostics before using
GX Works3.
The analog input module state can be checked with the POWER, RUN, ERROR, and ALM LEDs. The following table shows
the correspondence between the LEDs and the analog input module state.
Name Description
POWER LED Indicates the power supply status.
ON: Power ON
OFF: Power off or module failure
RUN LED Indicates the operating status.
ON: Normal operation
Flashing: Offset/gain setting mode
OFF: Error
ERROR LED Indicates the error status.
ON: Minor error
Flashing: Moderate error or major error
OFF: Normal operation
ALM LED Indicates the alarm status.
ON: Process alarm or rate alarm issued
Flashing: Input signal error
OFF: Normal operation
*1 For details, refer to the following.
Page 103 List of error codes
*2 For details, refer to the following.
Page 106 List of alarm codes
*1
*2
1 FX5-4AD
99
1.10 Troubleshooting
1