Technical Manual
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Central Operation Unit Smart
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The DPT RHCC status communication object is an additional 2 byte status object. It contains
additional status messages. As with the HVAC object, the hex values of several messages are added
together and the added value is output.
The following table shows the hex values associated with the individual messages:
Bit
DPT RHCC Status
Hex-Value
0
Error Sensor
1=Error
0x01
7
Heating/Cooling
0=Cooling/1=Heating
0x80
13
Frost alarm
1=Frost alarm
0x2000
14
Heat alarm
1=Heat alarm
0x4000
Table 43: 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 switchover by 1 Bit. If you switched the operating mode
last via 1 Byte, the controller will react to the switchover 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 switchover, the last 3 objects are for the switchover via 1
Byte:
Number Name
Length
Usage
156
Mode Comfort
1 Bit
Activation of the mode comfort
157
Mode Night
1 Bit
Activation of the mode night
158
Mode Frost/Heat protection
1 Bit
Activation of the mode Frost/ Heat protection
169
DPT_HVAC Status
1 Byte
Visualization of the chosen operating mode
172
DPT_RHCC Status
2 Byte
Visualization measuring/ status of the controller
173
mode selection
1 Byte
Selection of the operating mode
Table 44: Communication objects -Operating mode switchover