Setting
up Compax3
C3I20T11 / C3I32T11
194
192-120103 N13 C3I20T11 / C3I32T11 December 2010
Test functions
Test functions for the analysis of disturbance and setpoint behavior of the control
loops
1: 4 jerk functions
The properties of the setpoint behavior of the velocity controller can be acquired
from the velocity jerk response.
Characteristics of a control loop setpoint response
T
Sr
:
Response time. (Time elapsing until the control variable reaches one of the
+-5% tolerance limits for the first time)
T
S
:
Settling time. (Time elapsing until the control variable ultimately enters the +-
5% range)
V
m
:
maximum overshoot width
1
Tolerance range +-5%
2
Setpoint value
Response
The response of the controller is the behavior of the actual value with respect to the
calculated profile of the setpoint generator. The kinematic status variables, speed,
acceleration and jerk are fed into the cascade as feedforward signals. The
feedforward signals work with calculated factors and contribute to an improved
contour constancy due to the minimization of the following error.
