If X exceeds the upper limit HIGH, the function block reports this status with IND = 1.
If X exceeds the lower limit LOW, the function block reports this status with IND = 0.
Function description
INDi = 1, if X > HIGH
INDi = 0, if X < LOW
otherwise
INDi = INDi-1
If LOW is greater than HIGH, no hysterisis is created and IND indicates that X is greater than HIGH.
Maximum value delimiter with hysteresis