Siemens SINAMICS G120 Operating Instructions Manual page 252

Setting functions
8.5 Motor control
The actual value only slowly approaches
the setpoint.
• Increase the proportional component
K
The actual value quickly approaches the
setpoint, but overshoots too much.
• Decrease the proportional
component K
integration time T
Optimizing the speed control with BOP-2 or STARTER
Procedure
To manually optimize the speed controller with STARTER, proceed as follows:
1. Go online, and in the "Ramp-function generator" screen form, set the times = 0.
2. Set pre-control = 0 in the "Speed controller" screen form.
3. Enter a setpoint step and monitor the associated actual value, e.g. using the trace
function in STARTER.
4. Optimize the controller in the "Speed controller" screen form by adjusting controller
parameters K
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 speed controller back to 100%.
You have optimized the speed controller using STARTER.
To manually optimize the speed controller with BOP-2, proceed as follows:
1. Set the ramp-up and ramp-down times of the ramp-function generator p1120 = 0 and
p1121 = 0.
2. Set the pre-control of the speed controller p1496 = 0.
3. Enter a setpoint step and observe the associated actual value.
4. Optimize the speed controller by changing controller parameters K
runs optimally.
5. Set the ramp-up and ramp-down times of the ramp-function generator p1120 and p1121
back to their original value.
6. Set the pre-control of the speed controller p1496 = 100%.
You have optimized the speed controller using BOP-2.
252
and reduce the integration time
P
T .
N
and increase the
P
.
N
and T .
P N
Converter with the CU250S-2 Control Unit (vector)
Operating Instructions, 06/2013, FW V4.6, A5E31759476B AB
and T until the drive
P N