Manual
<Appendix 3. Input Selector (IS) Block>
A3-14
IM 01C25R03-01E
A3.4.3 STATUS_OPTS
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 others to be handled as ”bad” status inputs.
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
Relative
Index
Parameter
Write
Mode
Valid Range
Initial
Value
View
Description / Remarks
1 2 3 4
0 BLOCK_
HEADER
Block
Tag=O/S
TAG: “IS” Information relating to this function block, such as block
tag, DD revision, and execution time.
1 ST_REV ----- ----- 2 2 2 2 Indicates the revision level of the set parameters
associated with the IS block. If a setting is modied, this
revision is updated. It is used to check for parameter
changes, etc.
2 TAG_DESC Null A universal parameter that stores comments describing
tag information.
3 STRATEGY 1 2 A universal parameter intended for use by the high-level
system to identify function blocks.
4 ALERT_KEY 1-255 1 1 Key information used to identify the location where an
alert has occurred. Generally, this parameter is used
by the high-level system to identify specic areas in a
plant that are under the control of specic operators,
to distinguish necessary alarms only. This is one of the
universal parameters.
5 MODE_BLK 4 4 A universal parameter representing the operation status of
the IS block. It consists of the Actual, Target, Permit, and
Normal modes.
6 BLOCK_
ERR
----- ----- 2 2
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.
7 OUT MAN 0 5 5 Block output.
8 OUT_
RANGE
11 Set the range of OUT.
9 GRANT_
DENY
0 2 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 nd 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.
10 STATUS_
OPTS
O/S
“Use Uncertain
as good” and
“Uncertain if
Manual” only
0 2 A user-selectable option available for status handling in
the block.
11 IN_1 0 5 5 Input 1
12 IN_2 0 5 5 Input 2
13 IN_3 0 5 5 Input 3
14 IN_4 0 5 5 Input 4
15 DISABLE_1 0, 1 0 2 2 Selector switch to disable input 1 from being selected.
16 DISABLE_2 0, 1 0 2 2 Selector switch to disable input 2 from being selected.
17 DISABLE_3 0, 1 0 2 2 Selector switch to disable input 3 from being selected.
18 DISABLE_4 0, 1 0 2 2 Selector switch to disable input 4 from being selected.
19 SELECT_
TYPE
1-6 0 1 Species the input selection algorithm.