Setting functions
8.5 Motor control
Converter with control units CU250D-2
Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
143
Optimizing the speed controller
Procedure
To optimize the speed controller, proceed as follows:
1. Temporarily set the times of the ramp-function generator p1120 = 0 and p1121 = 0.
2. Temporarily set the pre-control of the speed controller p1496 = 0.
3. Enter a setpoint step and monitor the associated actual value, e.g. using the trace
function in STARTER.
4. Optimize the controller by adjusting the controller parameters K
P
and T
N
.
The actual value only slowly approaches the setpoint
.
• Increase the proportional component K
P
and reduce the
integration time T
N
.
The actual value quickly approaches the setpoint, but
overshoots too much.
• Decrease the proportional component K
P
and increase the
integration time T
N
.
5. Set the ramp-up and ramp-down times of the ramp-function generator back to their
original value.
6. Set the pre-control of the closed-loop speed controller to p1496 = 100%.
You have optimized the speed controller.
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