Emerson Fisher FIELDVUE DVC6000f User Manual

ISEL Function Block
December 2009
4-105
START
SELECT_TYPE
Middle?
Yes
No
SELECT_TYPE
Maximum?
SELECT_TYPE
Minimum?
More than 1
input?
Yes
All inputs with
same limit
status?
Yes
Propagate that
limit status
Input a
constant?
Propagate
Not Limited
No
Propagate
Constant
No
Yes
No
Yes
No
Input a
constant?
Propagate
Low Limit
Propagate
High Limit
Input a
constant?
Yes
SELECT_TYPE
First Good or Hot
Spare?
No
No
No
SELECT_TYPE
Average?
All inputs with
same limit
status?
Propagate
Not Limited
Yes
Yes
NoNo
1
1
NOTES:
LIMIT MANIPULATION FOR A CONSTANT INPUT FOR MAXIMUM AND MINIMUM IS BASED UPON THE FOUNDATION FIELDBUS SPECIFICATION.
THE REASONING IS BASED ON HIGH SELECT PROVIDING A LOW LIMIT STATUS AND LOW SELECT PROVIDING A HIGH LIMIT STATUS.
1
Yes
Yes
Figure 4-15. Input Selector Block Limit Propagation
Propagate
selected input
limit status
OP_SELECT
equal to zero?
Yes
No
Propagate
selected input
limit status
No
Yes
Illegal Select Type
should never be reached
4

Emerson Fisher FIELDVUE DVC6000f Specifications

General

Brand	Emerson
Model	Fisher FIELDVUE DVC6000f
Category	Controller
Language	English