Mitsubishi Electric MELSEC-L Series, Руководство пользователя

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16 - 7
Chapter 16 Troubleshooting
(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 the opposite direction
Check item Action
Is the value in "Rotation direction
selection/ travel direction
selection (PA14)" correct?
Check that the value in "Rotation direction selection/
travel direction selection (PA14)" matches the settings of
servo amplifier. When "Rotation direction selection/travel
direction selection (PA14)" has been changed, turn the
servo amplifier power supply ON again from OFF or reset
the controller, and execute the home position return.
(b) When a motor does not rotate at the set speed
Check item Action
Does the value in "
Md.28
Axis feedrate
"
(Note)
indicate
the set speed?
[When "
Md.28
Axis feedrate
"
(Note)
indicates the set speed]
• Check that the values in "
Pr.2
Number of pulses per rotation (AP)
",
"
Pr.3
Movement amount per rotation (AL)
", and "
Pr.4
Unit
magnification (AM)
" meet the system.
• When the servo amplifier has the electronic gear function, check
that the settings meet the system.
[When "
Md.28
Axis feedrate
"
(Note)
does not indicate the set speed]
• Check that the speed is not limited by the value in "
Pr.8
Speed
limit value
".
• In the JOG operation, check that the speed is not limited by the
value in "
Pr.31
JOG speed limit value
".
• In the JOG operation, check that Forward run JOG start signal
and Reverse run JOG start signal do not repeatedly turn ON and
OFF.
Signal LD77MS2/LD77MS4 LD77MS16
Forward run
JOG start signal
Y8, YA, YC, YE
Cd.181
Forward run
JOG start
Reverse run
JOG start signal
Y9, YB, YD, YF
Cd.182
Reverse run
JOG start
(Note): Speed control mode and continuous operation to torque control mode: "
Md.122
Speed
during command"