Chapter 3 Troubleshooting; Checking Using Leds - Mitsubishi Electric MELSEC iQ-R Series User Manual

3
TROUBLESHOOTING
This chapter describes errors that may occur while using the D/A converter module, and those troubleshooting.
3.1

Checking Using LEDs

Checking the display status of LEDs enables the primary diagnosis without an engineering tool and can narrow the range of
trouble causes.
The D/A converter module status can be checked using the RUN LED, ERR LED, and ALM LED. The following table lists the
correspondence relation between each LED and the D/A converter module status.
Name
RUN LED
ERR LED
ALM LED
*1 For details, refer to the following.
Page 106 Error Code List
*2 For details, refer to the following.
Page 110 Alarm Code List
3 TROUBLESHOOTING
100
3.1 Checking Using LEDs
Description
Indicates the operating status of the module.
On: Normal operation
Flashing (1s cycles): In offset/gain setting mode
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: Alert output
Off: Normal operation
*1
*2