Second Step - Mitsubishi Electric MDS-B-SPJ2 Series Specification Manual

The faulty area can usually be roughly determined when the above conditions are confirmed.
MDS-B-SPJ2 errors are largely divided as follows:
Class A trouble
Class B trouble

11.3 Second step

Class I trouble
The unit was
turned ON for the
first time but did
not operate
correctly.
(Note 1) Be sure to turn ON the start signal CW and CCW input after inputting the READY signal and
speed command.
11. Troubleshooting
The controller was turned ON for the first time but did not operate correctly. (I)
The unit operated normally before, but now suddenly will not operate. (II)
The unit does not operate normally sometimes. The orientation stop position
deviates. An alarm is displayed. (III)
Unit error Power supply unit error
Spindle drive unit error
Detector error Speed detection encoder error
1024P/rev encoder error
90000P/rev encoder error
Magnesensor error
Parameter and transfer data from the NC error
Power error
Motor error
Other errors (incomplete input signal conditions, cable break, etc.)
Investigation items
The unit was thoroughly tested before
shipping, so the unit should operate
correctly. If not, the following causes
are possible:
(1) The unit was damaged
somewhere by a strong blow
during operation or installation.
(2) The external wiring or sequence is
incorrect, or there is a broken wire.
Has the unit been properly
grounded?
Note that the power phase
sequence is unrelated.
(3) Is the parameter setting correct?
(4) The motor speed does not
increase.
(5) The motor unit operation itself is
normal.
(6) The unit operates normally except
during orientation. (Swaying, etc.)
(7) The C axis, synchronous tap and
spindle synchronization do not
operate normally.
(8) An alarm is displayed on the unit
7-segment LED.
(1) Carry out a thorough visual check
of the unit appearance to see if
there are any abnormalities.
(2) Check that the 7-segment LED in
the unit is ON.
Check that the external wiring and
sequences are complete. (Note 1)
The input/output signals to the unit
can be checked on the NC
SPINDLE MONITOR SCREEN.
(3) Check the spindle parameters.
(4) Check that the motor wiring UVW
is correctly connected.
Or, check that the speed
detector output waveform is
correct, especially for built-in
motors.
(5) Check that the load conditions are
the same as the design values.
(6) Carry out orientation adjustment.
(7) Adjust, and check the waveform of
each detector.
(8) Refer to section 2.5.
11 − 3
Remedy