Lenze L-force HighLine C 8400 Series Reference Manual page 230

8400 HighLine C | Reference manual
Motor control (MCTRL)
Servo control (SC)
If the mass inertia of the drive is unknown, the optimisation can be achieved as follows:
1. Specify speed setpoint.
2. Increase Vp (C00070/2) until the drive is unstable (observe motor noise).
3. Reduce Vp (C00070/2) until the drive runs stable again.
4. Reduce Vp (C00070/2) to approx. half the value.

Tip!
Values recommended by Lenze for the setting of the (proportional) gain:
• For drive systems without feedback: Vp = 6 ... 20
• For drive systems with a good disturbance behaviour: Vp > 12
Speed controller reset time Ti
Apart from setting the P component,
on the I component of the PI controller.
If the mass inertia of the drive is unknown, the optimisation can be achieved as follows:
1. Specify speed setpoint.
2. Reduce Ti (C00071/2) until the drive is unstable (observe motor noise).
3. Increase Ti (C00071/2) until the drive runs stable again.
4. Increase Ti (C00071/2) to approx. twice the value.

Tip!
Value range recommended by Lenze for the setting of the reset time:
Ti = 20 ms ... 150 ms
Differential time constant Tdn (rate time)
The differential time constant Tdn of the speed controller can be set in C00072.
If the mass inertia of the drive is unknown, the optimisation can be achieved as follows:
 Increase Tdn (C00072) during operation until optimal control mode is reached.
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C00071/2 provides the possibility to take influence
L
Firmware ≤ 11.00 - DMS 6.0 EN - 10/2011