User guide

Lenze · 9400 function library · Reference manual · DMS 6.7 EN · 08/2014 · TD05 501
5 Function blocks
5.132 L_SdProcessController - PID controller with limitation
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5.132.2 Adaptation of the controller gain via characteristic function
The controller gain can be adapted via the dnGainAdapt_n input and a parameterisable characteri-
stic function.
• In the characteristic default setting (y = 100 %), dnAdaptGain_n is ineffective. The controller
gain is directly effective (C04378).
• Only with the characteristic setting x1=0, y1=0, x2=100% and y2=100%, dnAdaptGain_n
directly acts on the controller gain:
• By changing the characteristic, the influence of dnAdaptGain_n on the controller gain can be
evaluated in percent:
Selection of the characteristic
The characteristic can consist of up to five points which are defined by the subcodes of C04384 and
C04385.
• Between the points a linear interpolation takes place.
• The characteristic is selected for the I. quadrant and mirrored at the Y axis.
• The same subcodes of C04384 and C04385 correspond to a pair of variates/point (x
n
, y
n
).
• The first pair of variates (C04384/1 and C04385/1) is always valid.
• The X values of the characteristic must be entered in ascending order (X1<X2<…<X5).
• If the ascending chain of x values is interrupted, this corresponds to the end of the characteristic
(see the following examples).
• Based on the last valid pair of variates, an extrapolation is executed to the end of the x value
range (±200 %) on both sides.
1 2 2 2 5
Y C04384/1 C04384/2 C04384/3 C04384/4 C04384/5
x C04385/1 C04385/2 C04385/3 C04385/4 C04385/5
P C04378=
P dnGainAdapt_n C04378⋅=
PfdnGainAdapt_n()C04378⋅=