Emerson Fisher Fieldvue DVC6030f Instruction Manual page 169

START
Yes
MODE_BLK
O/S?
No
Yes
MODE_BLK
MAN?
No
MODE_BLK
must be Auto
1
Bad
OP_SELECT
status?
Good
Yes
OP_SELECT
value >0?
No
No
At least 1 good
input?
Yes
Yes
SELECT_TYPE
Middle or
Average?
No
SELECT_TYPE Yes
Maximum or
Minimum?
No
Yes
SELECT_TYPE
Must be First
Good or Hot
Spare?
No
Illegal Select Type
should never be reached
NOTES:
1
AN INPUT STATUS MAY BE BAD, GOOD, OR UNCERTAIN. IF BAD, THE INPUT IS NOT USED AND THE STATUS IS PROPAGATED AS BAD WITH
SUBSTATUS NON-SPECIFIC. IF GOOD IT IS USED AND THE STATUS IS PROPAGATED AS GOOD (NON-CASCADE). IF UNCERTAIN, AND STATUS_OPTS
IS "USE UNCERTAIN AS GOOD" THEN THE INPUT IS USED AND THE STATUS IS PROPAGATED AS GOOD (NON-CASCADE), OTHERWISE IT IS NOT
USED AND THE STATUS IS PROPAGATED AS BAD WITH SUBSTATUS NON-SPECIFIC.
March 2006
STATUS_OPTS
Uncertain if Man
Mode?
No
1
Good
Selected in-
put status?
Bad
Yes
One input?
Multiple
Inputs
Propagate
Nonspecific
Yes
One input?
Multiple
Inputs
Yes
All inputs with
same value?
Propagate input
substatus as is
No
Figure 5-16. Input Selector Block Substatus Propagation
ISEL Function Block
Propagate Bad,
Out of Service
Yes
Propagate
Uncertain
Propagate Good
Noncascade
Propagate Bad,
Nonspecific
Propagate Good
Noncascade
Propagate Bad,
Nonspecific
Propagate input
substatus as is
Propagate
Nonspecific
5
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