Chapter 6 Troubleshooting; Troubleshooting With The Leds - Mitsubishi Electric MELSEC iQ-R User Manual

6
TROUBLESHOOTING
This chapter describes errors that may occur when the flexible high-speed I/O control module is used, and those
troubleshooting.
6.1

Troubleshooting with the LEDs

Checking the display status of LEDs enables the primary diagnosis without an engineering tool and can narrow the range of
trouble causes.
The status of the flexible high-speed I/O control module can be checked using the RUN LED and ERR LED. The following
table lists the correspondence relation between each LED and the status of the flexible high-speed I/O control module.
Name
RUN LED
ERR LED
*1 For details, refer to the following.
Page 220 List of Error Codes
6 TROUBLESHOOTING
212
6.1 Troubleshooting with the LEDs
Description
Indicates the operating status of the module.
On: Normal operation
Flashing (1s cycles): During simulation
Flashing (400ms cycles): When a module is selected for an online module change
Off: When 5V power off, a watchdog timer error has occurred, or exchanging the module is allowed in the process of the
online module change
Indicates the error status of the module.
On: An error has occurred.
Off: Normal operation
*1