Instruction Manual

Instruction Manual
D103434X012
Blocks
November 2014
128
Limit Propagation
Refer to figure B‐15. When SELECT_TYPE [19] is Average, Not Limited is propagated unless all inputs have the same
limit status. If all inputs have the same limit status, the limit status of the inputs is propagated.
If SELECT_TYPE [19] is Middle and the number of inputs used by the algorithm is greater than one: Not Limited is
propagated unless all selected inputs have the same limit status, in which case the limit status of the inputs is
propagated.
If SELECT_TYPE [19] is Middle and a single input, or if Maximum or Minimum then: If the selected input is a constant
and Middle, Constant is propagated. Otherwise, if the selected input is a constant and Maximum or Minimum,
propagate low if Maximum, propagate high if Minimum. If the selected input is not a constant, propagate selected
input limit as is.
When SELECT_TYPE [19] is First Good or Hot Spare or if OP_SELECT [22] is non‐zero, propagate selected input limit as
is.
Substatus Propagation
Refer to figure B‐16. For SELECT_TYPE [19] of Maximum, Minimum, First Good, Hot Spare, and Middle with only one
input, simply propagate substatus as is.
For SELECT_TYPE [19] of Maximum and Minimum with more than one input with the same value, propagate substatus
if all inputs are the same.
For SELECT_TYPE [19] of Average or Middle with more than one input, propagate NonSpecific.
If the status of OUT [7] is Bad, then the substatus will be as follows:
D Out of Service if the Target mode is Out of Service.
D Configuration Error with a BLOCK_ERR [6] of Configuration Error if the Actual mode is Out of Service.
D Otherwise a substatus of Non‐Specific.
STATUS_OPTS Supported
In the STATUS_OPTS [10] parameter, you can select from the following options to control the status handling:
D Use Uncertain as Good—sets the OUT [7] status to Good when the selected input status is Uncertain.
D Uncertain if in Manual mode: sets the OUT [7] status to Uncertain when the mode is Manual.
Note
The block mode must be Out of Service to set STATUS_OPTS [10].