Lenze 8400 motec Series, Software Manual, Page: 328 / 376

8400 motec | Software Manual
Function library
L_PCTRL_1
328
L
Firmware
≤
02.00 - DMS 2.1 EN - 03/2011
12.3.1 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 of the controller can be deactivated by setting the input bIOff to TRUE.

Setting the adjustment time Tn to the maximum value of "6000 ms" also deactivates
the I component.

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
= =