Learning Advanced Features
Sets the torque limit with the pulse input of the
terminal block.
The torque limit can be set up to 200% of the rated motor torque.
Sets the reverse torque limit for forward operation.
Sets the regenerative torque limit for forward operation.
Sets the regenerative torque limit for reverse operation.
Sets the reverse torque limit for reverse operation.
In.02 Torque at 100%
Sets the maximum torque. For example, if In.02 is set to 200% and an
input voltage (V1) is used, the torque limit will be 200% when 10 V is
entered. However, when the V1 terminal is set to the factory default
setting and the torque limit input source is any device other than the
keypad, check the parameter settings in Monitor mode. Set CnF.21–23
(only displayed when an LCD keypad is used) to 21 (Torque limit).
Cn.52 Torque Out LPF
Sets the time constant for torque command by setting the torque
controller output filter.
Adjust the controller gain according to the load’s characteristics. However, the motor can overheat or
the system can become unstable depending on the controller gain settings.
Speed controller gain can improve the speed control waveform while monitoring the changes in
speed. If the speed deviation does not decrease fast enough, increase the speed controller P gain or
decrease I gain (time in ms). However, if the P gain value is increased too much or the I gain value is
decreased too much, severe vibrations may occur. If oscillation occurs in the speed waveform, try to
increase the I gain (ms) or reduce the P gain to adjust the waveform.
5.11.3 Guidelines for Running a PM Synchronous Motor in Sensorless
Vector Control Mode
Problem
Troubleshooting
Starting torque is insufficient.
Cn.39 PMdeadBand
Per
Cn.40
Note1)
If an overcurrent trip occurs at startup, try
decreasing the value at Cn.48 in 10%
decrements.
Try increasing the value at Cn.39 or Cn.40 in
The motor hunts when starting
up.
Per
Try decreasing the value at Cn.40 in 10%
decrements.
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