Description of Function Codes PE6000 User Manual
168
A0-05
Forward maximum frequency in torque
control
Default
50.00 Hz
Setting Range
0.00 Hz to maximum frequency (P0-10)
A0-06
Reverse maximum frequency in torque
control
Default
50.00 Hz
Setting Range
0.00 Hz to maximum frequency (P0-10)
The two parameters are used to set the maximum frequency in forward or reverse rotation in
torque control mode.
In torque control, if the load torque is smaller than the motor output torque, the motor's
rotational speed will rise continuously. To avoid runaway of the mechanical system, the motor
maximum rotating speed must be limited in torque control.
You can implement continuous change of the maximum frequency in torque control
dynamically by controlling the frequency upper limit.
A0-07
Acceleration time in torque control
Default
0.00s
Setting Range
0.00–65000s
A0-08
Deceleration time in torque control
Default
0.00s
Setting Range
0.00–65000s
In torque control, the difference between the motor output torque and the load torque
determines the speed change rate of the motor and load. The motor rotational speed may change
quickly and this will result in noise or too large mechanical stress. The setting of
acceleration/deceleration time in torque control makes the motor rotational speed change softly.
However, in applications requiring rapid torque response, set the acceleration/deceleration
time in torque control to 0.00s.
For example, two AC drives are connected to drive the same load. To balance the load
allocation, set one AC drive as master in speed control and the other as slave in torque control. The
slave receives the master's output torque as the torque command and must follow the master
rapidly. In this case, the acceleration/deceleration time of the slave in torque control is set to 0.0s.
