IM 01C25R03-01E
A-33
APPENDIX 3. INPUT SELECTOR (IS) BLOCK
A3.4.3 STATUS_OPTS
TA0306.EPS
Bit
Description
Use Uncertain as Good
Causes all inputs (OP_SELECT, IN_n, and DISABLE_n) the status of
which is “uncertain,” to be handled as “good” (NC) status inputs and the
Uncertain if Man mode When the mode is Man, the status of OUT is interpreted as “uncertain.”
(This does not apply to SELECTED.)
A3.5 List of Input Selector Block Parameters
TA0307.EPS
0
Relative
Index
Parameter
Write Mode Valid Range Initial Value
View
2
1
3
2
7
5
5
8
11
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
5
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
1
4
Block Tag=O/S
MAN
--------
--------
2
2
2 2
12
13
15
16
17
18
14
BLOCK_HEADER
TAG_DESC
5
4
4
MODE_BLK
6
2
2
--------
--------
BLOCK_ERR
OUT
OUT_RANGE
11
IN_1
IN_2
IN_3
DISABLE_1
DISABLE_2
DISABLE_3
DISABLE_4
1
ST_REV
IN_4
TAG: “IS”
Null
3
2
STRATEGY
1
0
9
2
GRANT_DENY
0
0
0
0
0
0
0
0
0
1-6
0,1
0,1
0,1
0,1
0-8
0,1
0,1
0,1
0,1
O/S
10
2
STATUS_OPTS
0
19
SELECT_TYPE
0
1
0-8
20
MIN_GOOD
0
2
2
0-8
21
SELECTED
0
22
OP_SELECT
0
--------
--------
--------
--------
23
UPDATE_EVT
24
BLOCK_ALM
25
IN_5
0
26
IN_6
0
27
IN_7
0
28
IN_8
0
29
DISABLE_5
0
30
DISABLE_6
0
31
DISABLE_7
0
32
DISABLE_8
0
ALERT_KEY
1
1-255
4
1
Description / Remarks
Information relating to this function block, such as block tag, DD revision, and execution time
A universal parameter that stores comments describing tag information
Block output
Set the range of OUT
Input 1
Input 2
Input 3
Input 4
Selector switch to disable input 1 from being selected
Selector switch to disable input 2 from being selected
Selector switch to disable input 3 from being selected
Selector switch to disable input 4 from being selected
Indicates alarm information if a block alarm occurs.
Input 5
Input 6
Input 7
Input 8
Selector switch to disable input 5 from being selected
Selector switch to disable input 6 from being selected
Selector switch to disable input 7 from being selected
Selector switch to disable input 8 from being selected
Specifies the input selection algorithm.
A parameter to forcibly employ the input of a selected number (Operator-settable)
A universal parameter intended for use by the high-level system to identify function
blocks
A universal parameter representing the operation status of the IS block. It consists
of the Actual, Target, Permit, and Normal modes.
Indicates the error status relating to the Input Selector function block.
The bit used by this function block is as follows:
Bit 15: O/S mode
Indicates event information if an update event (setting change) occurs.
Parameter specifying the minimum required number of inputs with “good” status
If the number of inputs with “good” status is less than the value of MIN_GOOD, input
selection is canceled.
Indicates the revision level of the set parameters associated with the IS block. If a
setting is modified, this revision is updated. It is used to check for parameter
changes, etc.
Key information used to identify the location where an alert has occurred. Generally, this parameter
is used by the high-level system to identify specific areas in a plant that are under the control of
specific operators, to distinguish necessary alarms only. This is one of the universal parameters.
Indicates the number of the selected input. However, it indicates the number of
inputs used to calculate the average if SELECT_TYPE = Average.
If no input is selectable or if there are multiple inputs, it becomes “0” (none).
The parameter used to check if various operations have been executed. The bits in
the GRANT parameter corresponding to various operations are set before any of
them are executed. After the operations are complete, the DENY parameter is
checked to find out if any bit corresponding to the relevant operation has been set.
If no bit is set, it is evident that the operations have been executed successfully.
A user-selectable option available for status handling in the block
“Use Uncertain
as good” and
“Uncertain if
Manual” only
