P aram eter s
4
User instructions. DGM speed regulator
90
5.2 General aspects concerning the parameters
5.2.1
Explanation of the operating modes
Operating mode is the moment in which the actual reference value is generated.
In
the case of the frequency regulation mode, this is a simple conversion of the “raw” input
reference value into a speed reference value. In the case of regulation of the PID process, the
reference value and the actual value are compared and as a result the system regulates based
on a certain process quantity.
Frequenc y r egul ati on m ode:
The "Setpoint reference" values (1.130) are scaled into frequency reference values.
0 % corresponds to the "minimum frequency” (1.020).
10
0 % corresponds to the "maximum frequency” (1.021).
The sign placed before the reference value is decisive for the scaling.
P I D process regul a ti on:
The reference value for the PID process regulator is read as a percentage, as for the
“Frequency regulation mode". 100 % corresponds to the working range of the connected
sensor, which is read via the input of the actual value (selected via the"actual PID” value).
Based on the regulation difference, a speed control value is output based on the proportional P
(3.050), integral I (3.051) and derivative D (3.052) gain factors.
If there are uncontrollable regulation differences, to prevent an infinite increase of the integral
part, it is limited by a certain set value (corresponding
to the "maximum frequency” (1.021)).
