14
Parameter settings
Evaluation Unit KNX I4-ERD
• Version: 15.03.2016 • Technical changes and errors excepted.
The
minimum and maximum readings
can be saved and sent to the bus. With the
object "Channel X temp. reset min/max value" respectively "Channel X humidity reset
min/max value" the values can be reset.
4.3.2. Temperature threshold value 1/2
Activate the threshold value if required.
Threshold value:
The threshold value can be set directly in the application program using parameters,
or be defined 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.
A set threshold value will be retained until a new value or a change is transferred. The
current value is saved in EEPROM, so that this is retained in the event of a power sup-
ply failure and will be available once the mains power is restored.
On change of
(if sent on change)
0.1°C • 0.2°C • ... • 5.0°C (for temperature)
0.10% • ... • 2% • ... • 25% (for humidity)
Send cycle
(if sent periodically)
5 s • ... • 2 h
Use minimum / maximum values
Yes • No
Use threshold value 1
Yes • No
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
The last communicated value should
• not be retained
• be retained after power restoration
• be retained after power restoration and
programming
Start threshold value in 0.1°C
valid until first call
-300 … 800; 200
Type of threshold value change
Absolute value • Increase/decrease
