16
Parameter settings
Evaluation Unit KNX I4-ERD
• Version: 15.03.2016 • Technical changes and errors excepted.
4.3.3. Humidity 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.
Switching output sends on change and
periodically
Send switching output status
Switching output sends on change to 1 and
periodically
if switching output = 1
send 1
Switching output sends on change to 0 and
periodically
if switching output = 0
send 0
Use threshold value 1
Yes • No
Threshold value setpoint using
Parameter
• Communication objects
Threshold value in 0.1%
0 … 1000; 250
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%
valid until first call
0 … 1000; 250
Type of threshold value change
Absolute value • Increase/decrease
Step size
(upon increase/decrease change)
0.10% • ... • 2% • ... • 25%
Hysteresis of the threshold value in %
0 … 50; 20
