Technichal Manual Heating Actuators AKH
MDT technologies GmbH •
51766 Engelskirchen
• Papiermühle 1
Tel.: +49-2263-
880 • Fax: +49
-2263-4588
• [email protected] • www.mdt.de
7
2.5 Functions
The functions are identical for all channels. According to the hardware specification, the device
contains of up to 8 channels-
The labeling of the channels is in alphabetically consecutive order.
The general settings are the same for all of the channels.
There are 4 possible functions for each channel:
Channel
The channel has no function. So there are not any parameterization options for this channel.
switching (1 Bit)
The channel works with a 1 Bit value for the control value, e.g. from a two-step controller or
a PWM-signal. So the output can only be switched on or off at a change of the 1 Bit Input
signal.
By further options like valve type, activatable blocking objects, activatable emergency mode
and dew point alarm as well as status objects, the channel can be adjusted for the present
valve type.
continuous (1 Byte)
The channel works with 1 Byte value for the control value, e.g. from a PI-controller. The Input
signal is transmitted to the valve by a PWM-controller with adjustable cycle time.
Next to the same parameterization options like the 1 Bit input value, the actuator contains of
limitations for the control value and the flow temperature at the 1 Byte mode.
integrated controller
When a channel is selected as integrated controller, the channel creates an own continuous
control value from an existing temperature value. This continuous control transmitted to the
switching output by a PWM-signal.
Next to the same parameterization options as by the 1 Byte input value, the actuator
contains of a lot additional settings for the controller at the integrated controller mode.
