Mitsubishi Electric C70 Setup Manual page 600

Alarm No.
Power supply: Power module overheat
77
Thermal protection function in the power module has started its operation.
Investigation details
1 Confirm that the fan is properly rotating.
Check whether the heat dissipating fins are
2
dirty.
Measure the power supply unit's ambient
3
temperature.
Check if there is any abnormality in the
unit's ambient environment.
4
(Ex. Ambient temperature, noise,
grounding)
Alarm No.
Main side detector cable error
80
A pulse type cable is used for the motor side detector.
Investigation details
Check the parameters.
Servo:SV025 = "x200"
1 Spindle:SP031 = "x200"
And then, check the connected cable and
the detector.
Alarm No.
Sub side detector cable error
81
The cable type of machine side detector does not match the detector specifications set by the parameter.
Investigation details
Check if the below parameters match the
connected detector and cable.
1
Servo: SV025
Spindle: SP031
Alarm No.
Drive unit communication error
87 The communication frame between drive units was aborted.
Investigation details
Check the connection of the optical
1
communication cable between drive units.
2 Check the repeatability.
Investigation results
Large amounts of cutting oil or cutting chips,
etc., are adhered, or the rotation is slow.
The fan is properly rotating.
Cutting oil or cutting chips, etc., are
adhered, and the fins are clogged.
The fins are normal.
55°C or more
Less than 55°C.
Take remedies according to the causes of the abnormality in the ambient environment.
Investigation results
The cable type is pulse.
There is no problem with the selection of the
detector and cable.
Investigation results
The detector does not match the
specifications.
The parameter is not correct.
There is no problem with the selection of the
detector and cable.
Investigation results
The cable and connector were loose.
The cable and connector were not loose.
The error is always repeated (in high-speed
synchronous tapping).
Appendix 2.16 Troubleshooting
Remedies
Clean or replace the fan.
Check the investigation item No. 2.
Clean the fins.
Check the investigation item No. 3.
Improve the ventilation and cooling for the
power distribution panel.
Check the investigation item No. 4.
Remedies
Replace the cable to the serial type.
Replace the detector or cable.
Remedies
Replace the detector.
Set the parameters so that they meet the
machine side detector.
<Servo:SV025>
- Rotary
Pulse 2xxx
Serial 6xxx
- Scale
Pulse 8xxx
Serial Axxx
<Spindle:SP031>
Pulse 4200
Serial 6200
Replace the detector or cable.
Remedies
Connect again so as not to be loosened.
Replace the cable.
Check the investigation item No. 2.
Replace the servo drive or spindle drive unit
that is used for high-speed synchronous
tapping.
C70 Setup Manual
CV
SV SP
SV SP
SV SP
583