End of a limit violation

If a limit is violated, a value change within the limit range does not lead to a new reaction. Example: The limit range is from 100 to 200. If the value changes from 110 to 115, there is no new reaction. If the value changes to 200, there is a new reaction because of the next limit.

Threshold values: With theshold values a limit hysteresis can be realised, i.e. the limit has different values for starting and ending the violation. So unwanted reactions for flackering numerical values can be avoided. Example: Limit max. at 100, threshold value 10. As soon as the value of the variable reaches 100, the limit is violated. If the values goes down to 95, nothing happens. As soon as the values goes down to 89, the limit violation ends.

Attention

This limit hysteresis has nothing to do with the hysteresis defined in the variable. These two kinds of hysteresis are totally independent.