Chapter 4 Troubleshooting; Troubleshooting With The Leds - Mitsubishi Electric Melsec iQ-R Series User Manual

4
TROUBLESHOOTING
This chapter describes errors that may occur in the use of the A/D converter module and those troubleshooting.
4.1

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
the engineering tool.
A state of the A/D converter module can be checked with the RUN LED, ERR LED, and ALM LED. The following table shows
the correspondence of these LEDs and a state of the A/D converter module.
Name
RUN LED
ERR LED
ALM LED
*1 For details, refer to the following.
Page 80 List of Error Codes
*2 For details, refer to the following.
Page 82 List of Alarm Codes
4 TROUBLESHOOTING
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4.1 Troubleshooting with the LEDs
Description
Indicates the operating status of the module.
On: Normal operation
Flashing (400ms cycles): Selected as a module for the online module change
Off: 5V power supply interrupted, watchdog timer error occurred, or module replacement allowed in the process of the
online module change
Indicates the error status of the module.
On: Error occurred
Off: Normal operation
Indicates the alarm status of the module.
On: Warning (process alarm or rate alarm) issued
Flashing: Input signal error detected
Off: Normal operation
*1
*2