Mitsubishi Electric M800 Series Manual page 123

M800/M80/E80/C80 Series Alarm/Parameter Manual
8 Emergency Stop Alarms (EMG)
EMG Emergency stop
Details
The "emergency stop" signal for power supply is significant (open) because the external emergency stop func-
tion for power supply is enabled.
Remedy
Cancel the "emergency stop" signal.
Check for any broken wires.
EMG Emergency stop
[M8]
Details
The contactor shutoff test is being executed.
Remedy
The emergency stop is reset automatically after the contactor shutoff is confirmed.
If the contactor shutoff is not confirmed within 5 seconds after the "contactor shutoff test" signal has been
input, the "contactor welding detected" alarm occurs and the emergency stop status remains.
Make sure that the contactor's auxiliary b contact signal is correctly output to the device that is set in
"#1330 MC_dp1" and "#1331 MC_dp2" (Contactor weld detection device 1 and 2), and then turn the power
ON again.
[C80]
Details
The contactor shutoff test is being executed.
Safety-related I/O observation has not started, while "#51595 SIO_StartCond" is 1.
Remedy
The emergency stop is reset automatically after the contactor shutoff is confirmed.
If the contactor shutoff is not confirmed within 5 seconds after the "contactor shutoff test" signal (Y742)
has been input, the "contactor welding detected" alarm occurs and the emergency stop status remains.
Make sure that the contactor's auxiliary b contact signal is correctly output to the device that is set in
"#1330 MC_dp1", "#1331 MC_dp2", "#1339 MC_dp3" and "#1340 MC_dp4" (Contactor weld detection de-
vice 1,2,3 and 4), and then turn the power ON again.
Make sure that the safety I/O device is supplied with power, before turning ON the safety I/O observation
start request signal (ZR416/Bit1).
EMG Emergency stop
Details
The data backup for power failure might not have been executed successfully at the previous power failure.
Remedy
If this message appears frequently, the power supply may be deteriorated. Contact the service center.
IB-1501279-H 106
CVIN
MCT
IPWD