MDT Technologies AKH - 0800.01, Technical Manual

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Technichal Manual Heating Actuators AKH
MDT technologies GmbH •
51766 Engelskirchen
• Papiermühle 1
Tel.: +49-2263-
880 • Fax: +49
-2263-4588
• knx@mdt.de • www.mdt.de
40
The following chart shows the hex values for the single messages:
Bit DPT HVAC Status Hex-Value
0 Comfort 1=Comfort 0x01
1 Standby 1=Standby 0x02
2 Night 1=Night 0x04
3 Frost-/Heat protection 1= Frost-/Heat protection 0x08
4
5 Heating/Cooling 0=Cooling/1=Heating 0x20
6
7 Frost alarm 1=Frost alarm 0x80
Table 43: Hex-Values DPT HVAC Status
If you heat at the comfort mode, the communication object will send the value 20 (for heating) +1
(for the comfort mode) =21.
The DPT RHCC Status object is an additional 2 Byte status object with additional status messages. If
more than one testify is valid, also here the values will be added in the same way as at the HVAC
object.
The following chart shows the hex values for the single messages:
Bit DPT RHCC Status Hex-Value
0 Error Sensor 1=Error 0x01
8 Heating/Cooling 0=Cooling/1=Heating 0x100
13 Frost alarm 1=Frost alarm 0x2000
14 Heat alarm 1=Heat alarm 0x4000
Table 44: Hex-Values DPT RHCC Status
The Controller reacts always to the value, which was sent last. If you switched the operating mode
last via 1 Bit, the controller will react to the changeover by 1 Bit. If you switched the operating mode
last via 1 Byte, the controller will react to the changeover by 1 Byte.
The communication objects for the mode selection are shown at the following chart. The first 3
communication objects are for the 1 Bit changeover, the last 3 objects are for the changeover via 1
Byte:
Number Name Length Usage
11 Mode Comfort 1 Bit Activation of the mode comfort
12 Mode Night 1 Bit Activation of the mode night
13 Mode Frost/Heat protection 1 Bit Activation of the mode Frost/ Heat protection
25 DPT_HVAC Status 1 Byte Visualization of the chosen operating mode
30 DPT_RHCC Status 2 Byte Visualization measuring/ status of the controller
31 mode selection 1 Byte Selection of the operating mode
Table 45: Communication objects for the operating mode changeover