Mitsubishi Electric C70, Setup Manual

Page: 601 / 628

Appendix 2 Explanation of Alarms
MITSUBISHI CNC
584
(Note) For MDS-D-SVJ3/SPJ3 Series, "888" is displayed.
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.