Analog Control Blocks > Filter function block

Filter function block status handling

The output status is set to the worse status on IN and FOLLOW.

This is determined by first checking the quality (Bad=0, Uncertain=1, GoodProcess=2, and GoodCascade=3). If one status has a lower value than the other, then it is determined to be worse. If the quality value is the same, then the quality substatuses of the two are compared, and the higher substatus is determined to be worse. If the quality substatus is the same for both, then the limit fields of the status are checked with the higher limit being determined as worse.