Siemens SINAMICS G120 Operating Instructions Manual page 280

Advanced commissioning
6.18 PID technology controller
Manually setting the technology controller
Procedure
Proceed as follows to manually set the technology controller:
1. Temporarily set the ramp-up and ramp-down times of the ramp-function generator (p2257
and p2258) to zero.
2. Enter a setpoint step and monitor the associated actual value, e.g. with the trace function
of STARTER.
The slower the response of the process to be controlled, the longer you must monitor the
controller response. Under certain circumstances (e.g. for a temperature control), you need
to wait several minutes until you can evaluate the controller response.
3. Set the ramp-up and ramp-down times of the ramp-function generator back to their original
value.
You have now manually set the technology controller.
280
Optimum controller response for applications that do not permit
any overshoot.
The actual value approaches the setpoint without any significant
overshoot.
Optimum controller behavior for fast correction and quick com‐
pensation of disturbance components.
The actual value approaches the setpoint and slightly over‐
shoots, maximum 10% of the setpoint step.
The actual value only slowly approaches the setpoint.
● Increase the proportional component K
integration time T .
I
Actual value only slowly approaches the setpoint with slight os‐
cillation.
● Increase the proportional component K
time T (differentiating time).
d
The actual value quickly approaches the setpoint, but over‐
shoots too much.
● Decrease the proportional component K
integration time T .
I
Converter with the CU230P-2 Control Units
Operating Instructions, 09/2017, FW V4.7 SP9, A5E34257946B AE
and reduce the
P
and reduce the rate
P
and increase the
P