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MDS-D-SVJ3/SPJ3 Series Instruction Manual
6-3 Troubleshooting
Alarm No.
5D
Safety observation: Door state error
In safety monitoring mode, the door state signal from the NC and the same signal from the drive unit don't
match. Otherwise, door open state was detected in normal mode.
Investigation details Investigation results Remedies SV SP
1 Check the DI input timing.
Both NC side and drive unit side input
timings match one another within
500ms.
Review the DI input sequence.
Check if the cable for the DI input sig-
nal is broken.
NC side and drive unit side inputs do
not match one another within 500ms.
Investigate the wiring and connection
environment.
Alarm No.
5E
Safety observation: Feedback speed error
In safety monitoring mode, the motor speed was detected to exceed the safe speed.
Investigation details Investigation results Remedies SV SP
1 Check the DI input timing.
The feedback speed and safe speed
limit value are the same.
Reduce the commanded speed on the
NC side or increase the safe speed
limit value.
The feedback speed is slower than the
safe speed.
Replace the drive unit.
2
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.
5F
External contactor error
A contact of the external contactor is welding.
Investigation details Investigation results Remedies SV SP
1
Check whether the contactor's contact
has melted.
The contactor is melted. Replace the contactor.
The contactor is not melted. Check the investigation item No. 2.
2
Check whether the axis where an
alarm occurred was a contactor con-
trol axis.
The alarm occurred at the axis where
the contactor control is not executed.
Check the parameter.(SVJ3/SPJ3)
With contactor control
Servo:SV082, Spindle:SP227
0800h is added to the setting value.
Without contactor control
Change "Bit A,B" to "00" in the param-
eter above.
The alarm occurred at the axis where
the contactor control is executed.
Replace the drive unit.
Alarm No.
80
Main side detector cable error
A pulse type cable is used for the motor side detector.
Investigation details Investigation results Remedies SV SP
1
Check the parameters.
Servo:SV025 = "x200"
Spindle:SP031 = "x200"
And then, check the connected cable
and the detector.
The cable type is pulse. Replace the cable to the serial type.
There is no problem with the selection
of the detector and cable.
Replace the detector or cable.