Mitsubishi MELDAS MDS-C1 Instruction Manual page 261

Absolute position lost
Alarm No.
The backup voltage in the absolute position detector dropped causing the absolute position to be lost.
25
Investigation details
1 Is warning 9F occurring at the same
time?
2 Measure the battery voltage with a
tester.
3 Did alarm 18 occur when the power
was turned ON the last time?
4 Was the detector cable or battery
cable disconnected from the unit for a
long time?
5 Check the detector cable or battery
cable connection with a tester.
Unusable axis error
Alarm No.
A power module error is occurring with the axis for which the axis No. selection switch is set to "F" (not
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used axis).
Investigation details
1 Check if there is any abnormality in
the unit's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
Machine side detector, CPU error 2
Alarm No.
A CPU error was detected with the linear scale.
27
Investigation details
1 Check the alarm No. "1B" items.
Machine side detector, overspeed
Alarm No.
A speed exceeding the specified maximum speed was detected with the linear scale.
28
Investigation details
1 Check the linear scale's maximum
speed.
2 Check if there is any abnormality in
the detector's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
Machine side detector, absolute position data error
Alarm No.
An error was detected in the absolute position data detection circuit with the linear scale.
29
Investigation details
1 Check the alarm No. "1B" items.
Machine side detector, incremental position data error
Alarm No.
An error was detected in the relative position data detection circuit with the linear scale.
2A
Investigation details
1 Check the alarm No. "1B" items.
6. Troubleshooting
Investigation results
The warning is occurring.
The warning is not occurring.
3V or less.
3V or more.
Alarm 18 occurred.
Alarm 18 did not occur.
The unit was left for a long time.
Guide at delivery : 20 hours or more
After 5 years : 10 hours or more
The cables were not disconnected.
The connection is faulty.
The connection is normal.
Investigation results
No abnormality is found in particular.
An abnormality was found in the
ambient environment.
Investigation results
Investigation results
The rapid traverse rate is higher than
the specified value.
The rapid traverse rate is less than
the specified value.
No abnormality is found in particular.
An abnormality was found in the
ambient environment.
Investigation results
Investigation results
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Remedies
Investigate item 2.
Investigate item 3.
Replace the battery, and establish the
zero point.
Check the NC bus cable connection.
Turn the drive unit control power ON
again, and establish the zero point.
Investigate item 4.
Turn the drive unit control power ON
again, and establish the zero point.
Investigate item 5.
Replace the cable.
Replace the drive unit.
Remedies
Replace the drive unit.
Take remedies according to the
causes of the abnormality.
Ex. High temperature:
Check the cooling fan.
Incomplete grounding:
Additionally ground.
Remedies
Remedies
Use within the specified range.
Investigate item 2.
Replace the linear scale.
Take remedies according to the
causes of the abnormality.
Ex. High temperature:
Check the cooling fan.
Incomplete grounding:
Additionally ground.
Remedies
Remedies
SV SP
SV SP
SV SP
SV SP
SV SP
SV SP