Regio Midi manual
Chapter 10
Actuators
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Chapter 10 Actuators
Regio can be used with four types of actuators:
•
Analogue 0…10 V actuators
•
Thermal actuators
•
3-point actuators (Increase/Decrease actuators)
•
On/Off spring return actuators
On units without display, it is possible to select if thermal or analogue actuators will be used
via the DIP switches. For other actuators and Regio models, the actuator type is set via Regio
tool
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or, for controllers with a display, in the parameter menu.
Analogue actuators
The following output signals can be set for analogue actuators:
•
0…10 V (FS)
•
2…10 V
•
10…2 V
•
10…0 V
Thermal actuators
When thermal actuator control has been selected, it is controlled digitally with time
proportional pulses via output UO1 and UO2. By pulsing, the opening degree of the actuator
(and its valve) is varied. The period time (in seconds) is the sum of the on and off output times
on the output. The period time is FS=60s. The controller varies the on and off output times
proportionally depending on the output signal demand to the actuator.
3-point actuators
For 3-point actuators (increase/decrease actuators, -T-models), two digital outputs are used for
controlling one actuator, one output to open the actuator and one to close it. You can configure
the run time (in seconds) for the different actuators (FS=120 s). The program calculates the
position of the actuator (0…100 %) and sends an increase or decrease signal when the
controller output signal deviates more than the set neutral zone (FS=2 %) from the calculated
position.
In order not to subject the actuator motor to unnecessary wear, it is possible to configure the
outputs for 3-point actuators so that they will close after a control period of one minute plus
run time, at either 0 % or 100 %. This takes place via Modbus (Coil status register 23) or using
Regio tool
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.
On/Off actuators
On/Off actuators can be used in control modes 0-8.
Control mode:
0 = Heating
1 = Heating/Heating
