Function Block HYST

The Function Block HYST switches an output using hysteresis.

Input IN

The input IN expects a number. This is then analyzed.

Input LOW

Defines a value to switch off the output Q. If this value is equal or smaller than the input IN after switching on, the output Q will be switched off.

Note: This value must necessarily be smaller than the value of the input VAL_OFF.

Input HIGH

Defines a value to switch on the output Q. If this value is equal or greater than the input IN after switching off, the output Q will be switched on.

Note: This value must necessarily be greater than the value of the input VAL_OFF.

Input RESET

If this input is true, it resets the calculation. The calculation then only occurs using IN ≥ VAL_ON.

Output Q

The output is true if the value was greater than the input VAL_ON and has not fallen below VAL_OFF.