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MELSEC-Q
15 TROUBLESHOOTING
If a motor does not rotate even after the above items are checked, the possible
cause is a hardware failure.
Please consult your local Mitsubishi service center or representative, explaining a
detailed description of the problem.
(3) Troubleshooting when a motor does not rotate as intended.
Check items and corrective actions for troubleshooting when a motor does not
rotate as intended are described below.
(a) When a motor rotates only in one direction
Check item Action
Is the wiring correct?
Check that the signal line of the pulse output (for axis 1,
connector pin No. "1A15 to 18") is correctly wired or not
disconnected.
Does the pulse output mode
setting meet the
specifications of the drive
unit?
Set the value in "
Pr.5
Pulse output mode" so that it
satisfies the specifications of the drive unit.
(b) When a motor rotates in the opposite direction
Check item Action
Is the wiring correct?
Check that the signal line of the pulse output (for axis 1,
connector pin No. "1A15 to 18") is wired correctly. (CW
and CCW or phase A and phase B should be correctly
wired.)
Do the values in "
Pr.6
Rotation direction setting" and
"
Pr.23
Output signal logic
selection (b0: Command
pulse signal) " match the
settings of the drive unit?
Check that the values in "
Pr.6
Rotation direction
setting" and "
Pr.23
Output signal logic selection (b0:
Command pulse signal)" match the settings of the drive
unit.
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