System Manual – MOVITRAC® 07
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PI-controller
Project Planning
5.17
PI-controller
You can use the implemented PI-controller for temperature control, pressure control or
other applications. The PI-controller can be switched on and off.
Connect the actual value from the sensor (temperature, pressure, etc.) to analog input
AI1. You can scale the actual value up or down and assign an offset value, thereby
adapting it to the working range of the PI-controller.
You can set the PI-controller setpoint using one of the six programmed fixed setpoints
or specify the setpoint using the RS-485 or fieldbus (SBus) interface (
P100 = Setpoint
source
). Furthermore, it is possible to select the setpoint using the local setpoint poten-
tiometer.
The correcting variable of the PI-controller is a speed setpoint limited to the minimum
and maximum speed (
P301 = Minimum speed 1
and
P302 = Maximum speed 1
). The
speed ramp time setting has no effect if the PI-controller is active.
Default parameter settings are shown in bold below.
03178BEN
Figure 59: Structural diagram showing the implementation of the PI-controller
