Filter
Top Products
6 - 28
6 Troubleshooting
MITSUBISHI CNC
Alarm No.
49
Motor side detector: Error 6
The motor side detector (linear scale in the case of linear motor) detected an error.
As details differ for each detector, refer to "Detector alarm" in 6-2-1.
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "1B" items.
Alarm No.
4A
Motor side detector: Error 7
The motor side detector (linear scale in the case of linear motor) detected an error.
As details differ for each detector, refer to "Detector alarm" in 6-2-1.
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "1B" items.
Alarm No.
4B
Motor side detector: Error 8
The motor side detector (linear scale in the case of linear motor) detected an error.
As details differ for each detector, refer to "Detector alarm" in 6-2-1.
Investigation details Investigation results Remedies SV SP
1 Check the alarm No. "1B" items.
Alarm No.
4C
Current error at magnetic pole estimate
Current detection failed at the pulse-applied magnetic pole estimation by IPM spindle motor.
Investigation details Investigation results Remedies SV SP
1 Check the pulse-applied time.
The pulse-applied time can be short.
Set the pulse-applied time longer.
Setting parameter:SP142
1) The pulse-applied time (0 to 350)
2) For low-speed coil:1)+1000
3) The polarity of magnetic pole esti-
mate: Reverse polarity is "-"
After the adjustment, perform the
magnetic pole detection control again.
-
The alarm also occurs after the pulse-
applied time is set.
Replace the unit.
Alarm No.
4E
NC command mode error
The mode outside the specification was input in spindle control mode selection.
Investigation details Investigation results Remedies SV SP
1
Check the wiring and setting environ-
ment.
1) Correctly grounded?
2) Any noise generating devices
around the unit?
3) Are the speed/position detector ca-
bles correctly shielded?
1) The grounding is incomplete. Correctly ground.
2) The alarm occurs easily when a
specific device operates.
Use noise measures on the device de-
scribed on the left.
3) The cable is not correctly shielded. Correctly shield the cable.
No abnormality is found in particular. Replace the drive unit.
Alarm No.
4F
Instantaneous power interrupt
The control power supply has been shut down for 50ms or more.
Investigation details Investigation results Remedies SV SP
1 Check the repeatability. The alarm occurs occasionally.
Check the power facilities.
-
Check the wiring of the control power.