Function library
7-221
L
EDSVS9332P-D21 EN 3.0
7.5.60.4 Speed controller
The speed controller is designed as an ideal PID controller.
Parameter setting
If you select a motor from the table in chapter 5.2 in C0086, the parameters are preset so that only
few adaptations to the application are necessary, if any.
•
For setting parameters of the proportional gain Vp in C0070
– enter approx. 50 % of the speed setpoint
– increase C0070 until the drive becomes unstable (observe motor noises)
– Reduce C0070 until the drive runs stable again
– Reduce C0070 to approx. 50 %
•
For parameter setting of the reset time Tn in C0071
– reduce C0071 until the drive becomes unstable (observe motor noises)
– increase C0071 until the drive runs stable again
– set C0071 to the double value
•
For parameter setting of the derivative gain Td in C0072
– Increase C0072 during operation until an optimum behaviour is achieved.
Signal limitation
When the drive outputs the max. torque, the speed controller operates within the limits.
•
The drive cannot follow the speed setpoint.
•
This state is indicated with MCTRL-MMAX = HIGH.
Setting the integral component
To enter defined starting values for the torque the integral component of the n-controller can be set
externally (e.g. when using the brake control).
•
MCTRL-I-LOAD = HIGH
– The n-controller accepts the value at input MCTRL-I-SET as its integral component.
– The value at input MCTRL-I-SET acts as a torque setpoint for the motor control.
•
MCTRL-I-LOAD = LOW
– Function is switched off.
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