MDT Technologies AKK-03UP.02, Technical Manual

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Technical Manual Switch Actuator 3-fold, FanCoil
MDT technologies GmbH
•
51766 Engelskirchen
•
Papiermühle 1
Tel.: +49-2263-
880 • Fax: +49
-2263-4588
• knx@mdt.de • www.m
dt.de
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Setpoint offset:
Because the Delta T- Control controls always with the current setpoint, the setpoint can be shifted or
set to a new value. Three methods to change the setpoint are available:

Setting a new absolute setpoint
By sending a temperature to the object 28, a complete new setpoint is set.

Shifting the current setpoint by sending a temperature difference
By sending a temperature difference to object 29, the setpoint is shifted in relation to the
current setpoint.

Shifting the setpoint in steps by using a 1 Bit command
B se di g a „ , the setpoi t is i reased the adjusted step ra ge a d se di g a „ ,
the setpoint is reduced by the adjusted step range.
The following table shows the communication objects for the automatic mode
–
Delta T:
Number Name Length Usage
4 Control value failure 1 Bit Showing a control value failure
5 Heating/Cooling
switchover 1 Bit Switchover between heating/cooling; Showing
the current state
8 Manual setpoint offset 1 Bit Shifts the setpoint by the adjusted step range
27 Temperature value 2 Byte Receiving the current room temperature
28 Setpoint temperature 2 Byte Sending a new absolute setpoint
29 Setpoint offset 2 Byte Shifts the setpoint by a temperature difference
30 Current setpoint
temperature 2 Byte State of the current setpoint
Table 53: Communication objects - Automatic mode Delta T