Control Characteristic - Lenze 8400 StateLine C Reference Manual

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.
Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011
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8400 StateLine C | Reference manual
P nAdapt_a C00222 ⋅
=
75 [%]
P ------------------ - 2.0 ⋅ 1.5
= =
100 [%]
L
Function library
Function blocks | L_PCTRL_1
841