7 | Input / Output Description
34 | 44
Pump Control Instructions INVEOR VFD R5 COBRA_EN_en
7.7
PID Pressure Control
7.7.1
Description
In the case of PID pressure control, the target pressure value and actual pressure value are
compared and the system then regulates the rotational speed to reach the pressure target. This
requires to connect the optional pressure transmitter to the analogue input 1 or 2.
7.7.2
PID Pressure Control Setup
1.100 Control mode
Selecting the operation mode, following software enabling (1.131) and hardware enabling, the drive
controller runs as follows:
1 = PID process controller, with the target value of the PID process controller (3.050 – 3.071) and
target pressure (5.100) in mbar abs.
1.130 Reference channel
Determines the source from which the target value is to be read:
8 = PID fixed target values (3.062 to 3.069)
5.100 Target pressure
Select the required target pressure (mbar abs.)
3.050 PID-P amplification factor
Proportional share of PID controller amplification factor:
1 = should be adapted to your application (depending on the pump capacity and customer
installation)
3.051 PID-I amplification factor
Integral share of PID controller amplification factor
0.5 = should be adapted to your application (depending on the pump capacity and customer
installation)
3.052 PID-D amplification factor
Differential share of PID controller amplification factor
0 = should be adapted to your application (depending on the pump capacity and customer
installation)
3.060 PID actual value (PID feedback)
Selection of the input source from which the actual value for the PID process controller is imported:
0
= analogue input 1
1
= analogue input 2
Configuration of analogue input 1 or 2
►
Voltage Input (see 7.6.3.4 for Current Input)
4.020 / 4.050 AI1 / AI2 input type
4.021 / 4.051 AI1 / AI2 standard Low (%)
4.022 / 4.052 AI1 / AI2 standard High (%)
4.023 / 4.053 AI1 / AI2 dead time (%)
4.024 / 4.054 AI1 / AI2 filter time (second)
4.030 / 4.060 AI1 / AI2 function
4.033 / 4.063 AI1 / AI2 physical unit
4.034 / 4.064 AI1 / AI2 physical minimum
4.035 / 4.065 AI1 / AI2 physical maximum
