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Parameter settings
Interface KNX B8-TH
• Version: 24.08.2016 • Technical changes and errors excepted.
5.4.1. Threshold values 1...8
Threshold value
First decide to which of the sensors connected to the device the threshold value is to
be valid for.
Decide in which cases
threshold values and delay times
received are to be kept per
object. The parameter is only taken into consideration if the setting by object is activat-
ed further down. Please note that the setting "After power restoration and program-
ming" should not be used for the initial start-up, as the factory settings are always used
until the first call (setting via objects is ignored).
Set the threshold values directly in the application program using parameters, or de-
fine them via the bus using a communications object.
Threshold value setpoint using parameter:
Set the threshold values and hysteresis directly.
Threshold value setpoint using a communication object:
Beforehand, enter how the threshold value will be received from the bus. Basically, a
new value can be received, or simply a command to increase or decrease.
During initial commissioning, a threshold value must be defined which will be valid un-
til the first call with a new threshold value. For units which have already been taken into
service, the last communicated threshold value can be used. Basically, a temperature
range is given in which the threshold value can be changed (object value limit).
A set threshold value will be retained until a new value or a change is transferred. The
current value is saved in so that it is retained in the event of a power supply failure and
will be available again once the power supply is restored.
Threshold value valid for reading of
Plug-in sensor • circuit board sensor
The threshold values and delays received
by the communication object
are
• not
• to be retained after power restoration
• to be retained after power restoration and
programming
.
Threshold value setpoint using
Parameter
• Communication objects
Threshold value in 0.1°C
-300 … 800; 200
Hysteresis of the threshold value in %
0 … 50; 20
Threshold value setpoint using
Parameter •
Communication objects
Start threshold value in 0.1°C
valid until first call
-300 … 800; 200
Object value limit (min)
in 0.1°C
-300…800