Siemens SINAMICS G120D Original Instructions Manual page 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
4. Optimize the controller by adjusting the controller parameters K
5. Set the ramp-up and ramp-down times of the ramp-function generator back to their
6. Set the pre-control of the closed-loop speed controller to p1496 = 100%.
You have optimized the speed controller.
Converter with control units CU250D-2
Operating Instructions, 04/2014, FW V4.7, A5E34261542B AA
function in STARTER.
original value.
The actual value only slowly approaches the setpoint.
Increase the proportional component K
•
integration time T .
N
The actual value quickly approaches the setpoint, but
overshoots too much.
Decrease the proportional component K
•
integration time T .
N
Setting functions
8.5 Motor control
and T .
P N
and reduce the
P
and increase the
P
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