MDT Technologies AKH - 0800.01, Техническое руководство

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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
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The changeover of the operating modes via 1 Byte occurs by only one object, with the size of 1 Byte,
the DPT_HVAC Mode 20.102 of KNX-specification. Additional, there are 2 objects for the visualization
a aila le, the B te o je t DPT_HVAC “tatus a d the B te o je t DPT_RHCC “tatus . Fo the
changeover of the operating modes, a Hex-
alue is se t to the o je t ode sele tio .
The object
evaluates the received value and switches the belonging operating mode on and the active operating
mode off. If all operating modes are switched off (Hex-value=0), the operating mode standby will be
switched on.
The Hex-values for the operating modes are shown at the chart:
Operating mode (HVAC Mode) Hex-Value
Comfort 0x01
Standby 0x02
Night 0x03
Frost/Heat protection 0x04
Table 41: Hex-values operating modes
The following example shall clarify how the controller handles received Hex-values and switches
operating modes on or off. The chart is to read from the top to the down.
Example:
The priority was set as
Frost/Comfort/Night/Standby.
received Hex-value Handling adjusted operating
mode
0x01 Comfort=1 Comfort
0x03 Comfort=0
Night=1
Night
0x02 Night=0
Standby=1
Standby
0x04 Frost-/Heat protection=1
Standby=0
Frost-/Heat protection
Table 42: Example operating mode switchover via 1 Byte
The object
Mode sele tio a
also send its current state, by activating the following parameter:
Figure 27: Send state on "Mode selection"
Thus, the object also sends the status according to Table 41: Hex-values operating modes. The values
agree with the KNX standard and can be evalauated, without further processing, for example, from
Gira Home server.
The DPT HVAC Status communication, DPT_HVAC Status (without number) of KNX-specification,
object sends the hex value for the adjusted operating mode. When more than one testify is valid, the
hex values are added and the communication object sends the added value. The hex values can be
read from visualization afterwards.