Mitsubishi MELDAS MDS-C1 Instruction Manual page 285

Initial absolute position fluctuation
Warning No.
The position data fluctuated when creating the initial absolute position.
93
Investigation details
1 Check the state of the axis when the
NC power is turned ON.
MP scale feedback error
Warning No.
An excessive deviation was detected between the motor end detector and MP scale feedback data for
96
the MP scale absolute position detection system.
Investigation details
1 Check the alarm No. "43" items.
MP scale offset error
Warning No.
An error was detected in the offset data received from the MP scale for the MP scale absolute position
97
detection system.
Investigation details
1 Check if there is any abnormality in
the detector's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
2 Check the repeatability.
Absolute position detector, multi-rotation counter error
Warning No.
An error was detected in the multi-rotation counter for the absolute position detector. The absolute
9E
position cannot be compensated.
Investigation details
1 Check if there is any abnormality in
the detector's ambient environment.
(Ex. Ambient temperature, noise,
grounding)
2 Check the repeatability.
(Note) When this alarm occurs, the absolute position system's zero point must be established.
Battery voltage drop
Warning No.
The voltage of the battery supplying to the absolute position detector has dropped. The absolute
9F
position data is held.
Investigation details
1 Measure the battery (MDS-A-BT)
voltage.
2 Check whether the NC bus cable is
disconnected.
3 Check whether the battery wire in the
detector cable is broken.
4 Try replacing the drive unit.
(Note) When warning 9F occurs, do not turn the drive unit power OFF to ensure that the absolute position data is held.
6. Troubleshooting
Investigation results
The vertical axis or slant axis drops
when the NC power is turned ON.
The axis moves with an external
force when the NC power is turned
ON.
Investigation results
Investigation results
No abnormality is found in particular.
An abnormality was found in the
ambient environment.
Occurs frequently.
Is not repeated.
Investigation results
No abnormality is found in particular.
An abnormality was found in the
ambient environment.
Occurs frequently.
Is not repeated.
Investigation results
Less than 3V.
3V or more.
The cable is disconnected.
There is no problem.
The cable is broken.
The cable is not broken.
Improved.
Not improved.
6 - 40
Remedies
Check the brake operation.
Make sure that the axis does not
move when the power is turned ON.
Remedies
Remedies
Investigate item 2.
Take remedies according to the
causes of the abnormality.
Ex. High temperature:
Check the cooling fan.
Incomplete grounding:
Additionally ground.
Replace the detector.
Investigate item 1.
Remedies
Investigate item 2.
Take remedies according to the
causes of the abnormality.
Ex. High temperature:
Check the cooling fan.
Incomplete grounding:
Additionally ground.
Replace the detector.
Investigate item 1.
Remedies
Replace the battery unit.
Investigate item 2.
Connect correctly.
Investigate item 3.
Replace the cable.
Investigate item 4.
Replace the drive unit.
Replace the detector.
(With the absolute position system,
the zero point must be established.)
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