Mitsubishi Electric C70, Setup Manual

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C70 Setup Manual
Appendix 2.16 Troubleshooting
561
Alarm No.
1E
Sub side detector: Error 4
The machine side detector (CN3 side) detected an error. As details differ for each detector, refer to "Appendix 2.3.1" for
the description of this alarm.
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "1B" items.
Alarm No.
1F
Sub side detector: Communication error
An error was detected in communication data with the linear scale or the ball screw side detector. Or the communication
was interrupted.
Investigation details Investigation results Remedies SV SP
1
Jiggle the detector connectors (drive unit
side and detector side) and check if they are
disconnected. The connector is disconnected (or loose). Correctly install.
The connector is not disconnected. Check the investigation item No. 2.
2
Is the detector cable wired in the same
conduit as the motor's power cable, or are
the two cables laid in parallel near each
other?
The cables are wired near each other.
(Noise is entering from the power cable.)
Wire the detector cable away from the
power cable.
Shield the power cable.
The wires are sufficiently separated. Check the investigation item No. 3.
3
Is the motor FG wire connected only to the
drive unit which drives it?
(Is the motor grounded to one point?)
The motor FG wire is grounded on the motor
side. Ground the motor to one point, connecting
the wires together on the drive unit side.
The motor is grounded to one point. Check the investigation item No. 4.
4
Turn the power OFF, and check the detector
cable connection with a tester. (Is the cable
shielded?) The connection is faulty. Replace the detector cable.
The connection is normal. Check the investigation item No. 5.
5
Replace with another unit, and check
whether the fault is on the unit side or
detector side. The alarm is on the drive unit side. Replace the drive unit.
The alarm is on the detector side. Check the investigation item No. 6.
6
Check if there is any abnormality in the
detector's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
Alarm No.
21
Sub side detector: No signal2
When an excessive error alarm occurred, no signal from the machine side detector was detected.
An error was detected in the ABZ-phase in the full closed loop control system.
Investigation details Investigation results Remedies SV SP
1
Check the servo parameter (SV025. pen:
machine side detector), and spindle
parameter (SP019) setting value.
Are the pulse type detector parameters set
for a serial communication type detector?
The value is not set correctly.
Correctly set SV025.pen for the servo and
SP019 for the spindle (including SP097 for
pulse type).
The value is set correctly. Check the investigation item No. 3.
2
Jiggle the detector connectors (drive unit
side and detector side) and check if they are
disconnected. The connector is disconnected (or loose). Correctly install.
The connector is not disconnected. Check the investigation item No. 4.
3
Turn the power OFF, and check the detector
cable connection with a tester.
The connection is faulty. Replace the detector cable.
The connection is normal. Check the investigation item No. 5.
4
Replace with another unit, and check
whether the fault is on the unit side or
detector side. The alarm is on the drive unit side. Replace the drive unit.
The alarm is on the detector side. Replace the detector.
5
Check if there is any abnormality in the
detector's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
Alarm No.
22
Detector data error:
Drive unit received a wrong feedback data (scattered data) from the detector and position deviation occurred.
Investigation details Investigation results Remedies SV SP
1
Check if the installation of the detector is
loosened.
It is loosened. Tightly install the detector.
It is not loosened. Check the investigation item No. 2.
2
Check if an excessive vibration is occurring
during machining.
An excessive vibration is occurring. Check the installation of the machine.
An excessive vibration is not occurring. Check the investigation item No. 3.
3 Check the investigation item No.2 or subsequent items in Alarm No.21.