Mitsubishi C70 User Manual

IV - 114
Appendix 7. Explanation of Alarms
Appendix 7.7 Emergency Stop Alarms (EMG)
EMG Emergency stop MCT
Details
The status is one of the following:
- The contactor shutoff test is being executed.
- The output OFF check is being executed.
- The "dual signal check start" signal was not ON when "#21161 SftySgnlChkTrg (Dual
signal check-time change)" was set to "1". The output check and contactor welding
detection at the power ON have not been completed.
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.
- The emergency stop is reset automatically after the output OFF check is completed.
- If the contactor shutoff is not confirmed within 5 seconds after the "output OFF check"
signal has been input, the "output OFF check error" alarm occurs. The dual signal module
may be broken when this alarm occurs. Replace the module.
- When "#21161 SftySgnlChkTrg (Dual signal check time change)" is set to "1", turn ON the
"dual signal check start" signal after the power ON.
EMG Emergency stop IPWD
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.
EMG Emergency stop SUIN
Details
The emergency stop input signal (M0) is OFF in the NC/PLC safety circuit.
Remedy
- Check the conditions for turning ON the emergency stop input signal.
- Check for any broken wires.
EMG Emergency stop STP2
Details
Sequence programs stopped in CNC.
Remedy
- Correct the rotary switch 1 (on the right) of the control unit if set to “1”.
EMG Emergency stop MULT
Details
An error related to Q bus or Qr bus occurred.
Remedy
- Refer to the error No. that follows the message “A01 Multi CPU error” to take a remedy.

Mitsubishi C70 Specifications

General

Brand	Mitsubishi
Model	C70
Category	Control Unit
Language	English