Mitsubishi MELSEC-WS0-CPU0 User Manual page 83

Diagnostics
How to place the device back in operation:
 Rectify the cause of the malfunction in accordance with the display of the MS and
CV LEDs.
 In the case of critical faults, switch the voltage supply of the MELSEC-WS safety
controller off for at least 3 seconds and back on again.
The MELSEC-WS safety controller may restart when it detects a recoverable error
caused by noise. The MELSEC-WS safety controller is ready for operation again if the
error cause has been eliminated after the restart. Create an interlock program using a
reset button to prevent the MELSEC-WS safety controller from restarting automatically
after the safety function is activated and the safety controller turns off the outputs.
Chapter 10
80