Expert
Logger
value. You can also set which input values the first D term reacts to. All
non-effective values are taken as 0.0.
The option is only available if the first D term operates without
Delay time
.
D2 term affects
: Specify how the second D term of the controller is to use
the
control deviation (xd)
or immediately the
process variable (x)
as an
input value.
Dead zone
: Activates the dead zone of the control deviation (xd). Specify
the zero point of the dead zone with
Zero point
. The entry field
Width
con-
tains the maximum deviation from the zero point of the dead zone, within
which the control deviation is set to 0.0.
Output limitation
: This option allows the value range of the manipulated
variable to be limited to values larger than -100% or smaller than +100%.
The cut term of the manipulated variable can optionally be fed back to the
second D term of the controller.
4.11.15
Pulse width modulation (PWM)
This software channel generates a square signal with a variable frequency
and variable pulse-pause ratio. The pulse-pause ratio is determined by the
source.
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Januar 2018
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