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MDS-D2/DH2 Series Instruction Manual
7.3 Troubleshooting
(Note) For MDS-DJ Series, "888" is displayed.
Alarm No.
81
Sub side encoder cable error
The cable type of machine side encoder does not match the encoder specifications set by the parameter.
Investigation details Investigation results Remedies SV SP
1
Check if the below parameters match the
connected encoder and cable.
Servo: SV025
Spindle: SP031
The encoder does not match the
specifications.
Replace the encoder.
◯◯
The parameter is not correct.
Set the parameters so that they meet the
machine side encoder.
<Servo:SV025>
- Rotary
Pulse 2xxx
Serial 6xxx
- Scale
Pulse 8xxx
Serial Axxx
<Spindle:SP031>
Pulse 4200
Serial 6200
There is no problem with the selection of the
encoder and cable.
Replace the encoder or cable.
Alarm No.
87
Drive unit communication error
The communication frame between drive units was aborted.
Investigation details Investigation results Remedies SV SP
1
Check the connection of the optical communication
cable between drive units.
The cable and connector were loose. Connect again so as not to be loosened.
◯◯
The cable and connector were not loose.
Replace the cable.
Check the investigation item No. 2.
2 Check the repeatability.
The error is always repeated (in high-speed
synchronous tapping).
Replace the servo drive or spindle drive unit
that is used for high-speed synchronous
tapping.
◯◯
Alarm No.
88
Watchdog
The system does not operate correctly.
Investigation details Investigation results Remedies SV SP
1
Check whether the servo or spindle software
version was changed recently.
The version was changed. Change software version back to the original.
◯◯
The version was not changed. Check the investigation item No. 2.
2 Check the repeatability.
The error is always repeated. Replace the drive unit.
◯◯
The state returns to normal once, but occurs
sometimes thereafter.
Check the investigation item No. 3.
3
Check if there is any abnormality in the unit's
ambient environment.
(Ex. Ambient temperature, noise, grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
◯◯
Alarm No.
8A
Drive unit communication data error 1
The communication data 1 between drive units exceeded the tolerable value in the communication between drive units.
Investigation details Investigation results Remedies SV SP
1
Check if the error has occurred during high-speed
synchronous tapping.
The error occurs during the synchronous
tapping.
[1]Check the tool.
[2]Adjust the tapping.
◯◯
The error does not occur during the
synchronous tapping.
Check the investigation item No. 2.
2 Check the repeatability.
The error is always repeated. Replace the drive unit.
◯◯
The state returns to normal once, but occurs
sometimes thereafter.
Check the investigation item No. 3.
3
Check if there is any abnormality in the unit's
ambient environment.
(Ex. Ambient temperature, noise, grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
◯◯
Alarm No.
8B
Drive unit communication data error 2
The communication data 2 between drive units exceeded the tolerable value in the communication between drive units.
Investigation details Investigation results Remedies SV SP
1
Check if the error was occurred during the
synchronous tapping.
The error occurs during the synchronous
tapping.
[1]Check the tool.
[2]Adjust the tapping.
◯◯
Check if the error has occurred during high-
speed synchronous tapping.
Check the investigation item No. 2.
2 Check the repeatability.
The error is always repeated. Replace the drive unit.
◯◯
The state returns to normal once, but occurs
sometimes thereafter.
Check the investigation item No. 3.
3
Check if there is any abnormality in the unit's
ambient environment.
(Ex. Ambient temperature, noise, grounding)
Take remedies according to the causes of the abnormality in the ambient environment.
◯◯