Fieldbus Input Selector Extended function block status handling

Uncertain if man mode

Use uncertain as good

The output status depends on the following rules:

Status quality

• If the number of Uncertain or Good inputs is less than MIN_GOOD, OUT and SELECTED statuses are set to Bad.

• If an input is disabled and selected via OP_SELECT, the status of OUT and SELECTED will be the status of that input.

Substatus

• For SELECT_TYPE = MAX, MIN, FIRST_GOOD, and MID with an odd number of inputs, simply propagate substatus as is.

• For AVG or MID with even numbers of inputs, propagate NonSpecific.

Limit status

• If SELECT_TYPE = MID with an even number of inputs, set OUT limit status to NotLimited.