Mitsubishi Electric MDS-B-SPJ2 Series Specification Manual page 163

(23) Alarm No.
[Details] After completion of the orientation in-position, the error between the command and
feedback exceeded the setting value (SP114: 0PER).
Investigation items
1 Is the speed detector
cable correctly
shielded?
2 Is the encoder cable
broken?
3 Push and pull on the
encoder or speed
detector cable, and
use a tester to check if
a wire is almost
broken.
4 Are the A, B and Z
phase waveforms of
the speed detector
adjusted correctly?
(24) Alarm No.
[Details] The system did not operate correctly, and the software processing did not finish within
the specified time.
Investigation items
1 Investigate
repeatability.
2 Investigate the wiring
and installation
environment.
1) Is the unit correctly
grounded?
2) Are there any
devices that
produce noise
around the unit?
(25) Warning No.
[Details] This warning occurs when the regenerative resistor load reaches 80% of the alarm.
Investigation items
1 Investigate as in alarm
No. 30 , and carry
out the appropriate
measures.
11. Troubleshooting
5C : ORIENTATION FEEDBACK ERROR
Investigation results
The cable is not correctly shielded.
The cable is correctly shielded.
The cable is broken.
The cable is not broken.
A wire is almost broken.
The wires are normal.
The waveforms deviate.
The waveforms are normal.
88 : WATCHDOG
Investigation results
The alarm occurs every time ready
ON occurs.
The alarm sometimes occurs.
1) The grounding is incomplete.
2) The alarm occurs easily when a
specific device is operated.
No particular problem.
EO : OVER REGENERATION WARNING
Investigation results
Correctly shield the cable.
Investigate item 2, and carry out the
appropriate measures.
Use one encoder cable.
Investigate item 3, and carry out the
appropriate measures.
Replace the cable.
Investigate item 4, and carry out the
appropriate measures.
Correctly adjust the waveforms.
Replace the unit, or readjust/replace
the position detector.
Replace the unit.
Investigate item 2, and carry out the
appropriate measures.
Correctly ground the unit.
Execute noise countermeasures for
the device at the left.
Replace the unit.
11 − 19
Remedy
Remedy
Remedy