Function Threshold - ABB i-bus KNX Product Manual

ABB i-bus® KNX FUNCTION
4.1.8

Function Threshold

The function Threshold is used to compare the value received at the threshold input with the thresholds
set in the parameters Upper threshold and Lower threshold.
Depending on the setting in the parameter Data type of group object "Threshold input", one of the fol-
lowing group objects serves as the threshold input:
• Threshold input Percent (DPT 5.001), 0 % ... 100 %
• Threshold input Meter pulses (DPT 5.010), 0 ... 255
• Threshold input Meter pulses (DPT 7.001), 0 ... 65,535
• Threshold input Temperature (DPT 9.001), -100 °C ... 250 °C
• Threshold input Lux (DPT 9.004), 0 ... 65,535
A result can be defined in the following parameters depending on whether the value of the threshold in-
put is above, below or between the thresholds.
• Result if upper threshold is exceeded
• Result if lower threshold is dropped below
• Result if the input value is between the thresholds
Additionally, a minimum duration for undershooting and overshooting the thresholds can be defined in
the following parameters.
• Min. duration of the overshoot
• Min. duration of the undershoot
• Minimum dwell time between the thresholds
The result can be inverted, linked with any output within the device or output on the group object
Result .
If, in the Change thresholds via KNX parameter, the Yes option was set, the thresholds set in ETS can be
changed using the following group objects. The DPT depends on the setting in the parameter Data type
of group object "Threshold input".
• Change upper threshold Percent (DPT 5.001), 0 % ... 100 %
• Change upper threshold Meter pulses (DPT 5.010), 0 ... 255
• Change upper threshold Meter pulses (DPT 7.001), 0 ... 65,535
• Change upper threshold Temperature (DPT 9.001), -100 °C ... 250 °C
• Change upper threshold Lux (DPT 9.004), 0 ... 65,535
• Change lower threshold Percent (DPT 5.001), 0 % ... 100 %
• Change lower threshold Meter pulses (DPT 5.010), 0 ... 255
• Change lower threshold Meter pulses (DPT 7.001), 0 ... 65,535
• Change lower threshold Temperature (DPT 9.001), -100 °C ... 250 °C
• Change lower threshold Lux (DPT 9.004), 0 ... 65,535
Product manual | SAH/S x.x.7.1 | 2CDC505173D0211 Rev. A 85