Temperature Sensor - ABB i-bus KNX Product Manual

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ABB i-bus KNX
Parameters
7.11.1.4

Temperature sensor

This option is only available for inputs a and b.
Select the Temperature sensor option to use the input for temperature measurement. It can then be used
to measure the room temperature or to measure a temperature limitation value.
Select the Via physical device input option in the Temperature input parameter on the Application
parameters page to take the status of this input into account in room temperature control. Without this
setting, the input value is sent on the bus but not taken into account in the controller.
In the Basic-stage heating, Additional-stage heating, Basic-stage cooling and Additional-stage cooling
parameter windows, selecting Activate temperature limitation, Yes and Input for temperature limitation
sensor, Input a means that the temperature sensor value measured here will only be used for temperature
limitation and can no longer be used to measure room temperature.
The temperature value is output via the 2-byte group object Input x – Temperature. You can also establish
whether there is a fault on the input, e.g. a short circuit or cable break. A fault is reported if the resistance
falls below 50 ohms or exceeds 100 kohms.
Faults are reported via the 1-bit group object Input a – Input fault. If a fault occurs, this object changes
state from 0 to 1. These two group objects are sent depending on the reaction parametrized in Send status
values.
If several inputs are set to this option and the controller runs an evaluation, it calculates the average
value of all the temperature inputs. Temperature inputs used as temperature limitation sensors are
excluded from this calculation.
Inputs are scanned after a bus voltage recovery, download or ETS reset. Their current status is sent on
the bus when the sending and switching delay is complete.
Note
Note
VC/S 4.x.1 | 2CDC508220D0211 Rev. A 177