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Art. No. SC 1000 KNX
Controller status
The room temperature controller can transmit its current status to the KNX. A choice of data
formats is available for this. The "Controller status" parameter in the "Room temperature control
-> Controller general -> Command value and status output" parameter branch will enable the
status signal and set the status format...
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"KNX compliant"
The KNX compliant controller status feedback is harmonised on a manufacturer-specific
basis, and consists of 3 communication objects. The 2-byte object "KNX status" (DPT
22.101) indicates elementary functions of the controller. This object is supplemented by the
two 1-byte objects "KNX status operating mode" and "KNX status forced operating mode"
(DPT 20.102), which report back the operating mode actually set on the controller (see
page 181). The last two objects mentioned above are generally used to enable controller
extensions to display the controller operating mode correctly in the KNX compliant status
display. Therefore these objects should be connected with controller extensions if the KNX
compliant status feedback is not configured.
Bit of the status
telegram
Meaning
0
Controller error status ("0" = no error / "1" = error)
1
not used (permanent "0")
2
not used (permanent "0")
3
not used (permanent "0")
4
not used (permanent "0")
5
not used (permanent "0")
6
not used (permanent "0")
7
not used (permanent "0")
8
Operating mode ("0" = Cooling / "1" = Heating)
9
not used (permanent "0")
10
not used (permanent "0")
11
not used (permanent "0")
12
Controller disabled (dew point operation) ("0" = Controller enabled /
"1" = Controller disabled)
13
Frost alarm ("0" = Frost protection temperature exceeded /
"1" = frost protection temperature undershot)
14
Heat alarm ("0" = heat protection temperature exceeded /
"1" = Heat protection temperature exceeded)
15
not used (permanent "0")
Bit encoding of the 2 byte KNX compliant status telegram
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"Controller general":
The general controller status collects essential status information of the controller in two 1-
byte communication objects. The "Controller status" object contains fundamental status
information. The "Status signal addition" object collects in a bit-orientated manner further
information that is not available via the "Controller status" object. For example, controller
extensions can evaluate the additional status information, in order to be able to display all
the necessary controller status information on the extension display.
Page 209 of 347
Software "Smart Control 501511"
Functional description