Order No. 2104 ..
Controller status
The room temperature controller can transmit its current status to the KNX/EIB. 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...
-
"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 (see Table 7). 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 . 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")
Table 7: Bit encoding of the 2 byte KNX compliant status telegram
Page 104 of 171
Software "KNX CO2 sensor"
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