Threshold Switch

The Threshold Switch analyzes an analog input value using two threshold values, and switches a digital output accordingly.
The two threshold values form a hysteresis, which prevents frequent toggling of the output when the analog value fluctuates around a threshold value.

Typical applications of the function block are fill level control, heating, ventilation and air conditioning technology, etc.

Table of Contents


Inputs

Abbreviation Summary Description Value Range
AI Input Analogue Input




Outputs

Abbreviation Description
Q Output




Parameters

Abbreviation Summary Description Value Range Default Value
Von On-value Input parameter - On-value of the threshold switch 5
Voff Off value Input parameter - Off-value of the threshold switch 1
Rem Remanence input Remanence input: If active, the function block retains its previous state after a Miniserver reboot. - 0




Function

Von above Voff: The output (Q) is activated as soon as the value of the input (AI) exceeds the threshold (Von) and deactivated when (AI) falls below the threshold (Voff):

Von below Voff: The output (Q) is deactivated as soon as the value of the input (AI) exceeds the threshold (Voff) and activated when (AI) falls below the threshold (Von):