Flowchart For When The "Err." Led Flashes - Mitsubishi Electric MELSEC QS SERIES User Manual

9
TROUBLESHOOTING

9.2.3 Flowchart for when the "ERR." LED flashes

The following shows the flowchart for when the "ERR." LED flashes at power ON of the
safety remote I/O module or during operation of the programmable controller.
"ERR." LED is flashing.
Is the "ERR." LED
flashing at 100-ms intervals?
Is power
supplied to the external
power supply terminal
(I/O 24V, I/O 24G)?
Conduct PLC diagnostics with GX
Developer connected to the safety CPU
module. (For PLC diagnostics, refer to GX
Developer Version 8 Operating Manual
(Safety PLC).)
Can the error
information of the safety
remote I/O module
be acquired?
NO
Read the error history.
(For reading of the error history,
Section 4.5
refer to Section 4.5. )
Could the error
history of the safety remote
I/O module be read?
YES
Is there error
information at the estimated
time in the error history?
NO
End reading the error history.
(For reading of the error history,
Section 4.5
refer to Section 4.5. )
Is the "ERR." LED turned off?
YES
Completed
9
- 6 9.2 Troubleshooting with LEDs
9.2.3 Flowchart for when the "ERR." LED flashes
YES
Set the switches.
(For the settings, refer to Section 6.6.)
YES
Supply power to the external power
supply terminal (I/O 24V, I/O 24G).
YES
1
NO
Replace the safety remote I/O module.
YES
1
NO
Replace the safety remote I/O module.
Figure 9.4 Flowchart for when the "ERR." LED flashes
1
Is the error code described
in the manual?
NO
Please consult your local Mitsubishi service
center or representative, explaining a
detailed description of the problem.
YES
Perform troubleshooting according to the
acquired error information.
Section 9.5
(For error codes, refer to Section 9.5.)