Siemens SINAMICS G120 Operating Instructions Manual page 194

Functions
9.6 Motor control
Procedure
 Temporarily set the ramp-up and ramp-down time of the ramp-function generator to zero.
With an Operator Panel:
 Set p1120 = 0 and p1121 = 0.
 Temporarily set the pre-control of the speed controller to zero.
With an Operator Panel:
 Set p1496 = 0.
 Enter a setpoint step and monitor the associated actual value, e.g. using the trace
 Optimize the speed controller by changing controller parameters K
With an Operator Panel:
 K
 T
 Set the ramp-up and ramp-down times of the ramp-function generator back to their
 Set the pre-control of the speed controller back to 100 %.
Table 9- 30
192
function in STARTER.
runs optimally (see the diagrams below).
= p1470
P
= p1472
N
original value.
Optimum control response
Using STARTER:
 Go online with STARTER.
 Set the times to 0 in the "Ramp-function
generator" screen form.
Using STARTER:
 Go online with STARTER.
 Set the precontrol to 0 in the "Speed
controller" screen form.
Using STARTER:
 Go online with STARTER.
 Set the controller in the "Speed controller"
screen form.
Optimum control response for
applications that do not permit any
overshoot.
The actual value approaches the
setpoint, without any significant
overshoot.
Optimum control behavior for fast
correction and quick compensation of
noise components.
The actual value approaches the
setpoint and slightly overshoots
(maximum 10% of the setpoint step).
SINAMICS G120C frequency converter
Operating Instructions, 03/2012, FW V4.5, A5E02999804B AB
and T until the drive
P N