Firmware
≤
11.00 - DMS 8.0 EN - 10/2011
L
841
8400 StateLine C | Reference manual
Function library
Function blocks | L_PCTRL_1
16.1.39.1 Control characteristic
The PI algorithm is active in the Lenze setting.
Gain (P component)
The input value is controlled by a linear characteristic. The slope of the characteristic is
determined by the controller gain Vp.
The controller gain Vp is set under
C00222
.
The controller gain can be adapted via the input
nAdapt_a
(also possible in online
mode).
The input value
nAdapt_a
has a direct effect on the controller gain:
Example: With the parameterised controller gain Vp = 2.0 and
nAdapt_a
= 75 %, the
resulting gain factor is as follows:
Integral action component (I component)
The I component can be selected via the input
nISet_a
. With a TRUE signal at
bISet
, the
assigned value is accepted in the PID controller.
Setting the adjustment time Tn to the maximum value of "6000 ms" deactivates the I
component.
The I component of the controller can also be deactivated by setting the input
bIOff
to
TRUE.
The I component can be switched on and off online.
Adjustment time
The adjustment time Tn is set under
C00223
.
Differential component Kd (D component)
The differential component Kd is set under
C00224
.
The setting "0.0 s" deactivates the D component (Lenze setting). In this way, the PID
controller becomes a PI controller or P controller, if the I component has been
deactivated as well.
P
nAdapt_a C00222
⋅
=
P
75 [%]
100 [%]
-------------------
2.0
⋅
1.5
=
=
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