IM 01C25R03-01E
A-23
APPENDIX 3. INPUT SELECTOR (IS) BLOCK
A3.2
Input Section
A3.2.1 Mode Handling
The Input Selector block’s operations are determined by the mode (parameter name: MODE_BLK). The following
describes operations in each mode.
TA0301.EPS
Supported Mode
Role
O/S
(Out of Service)
· System-stopped status
· Allows you to make changes to configuration.
Auto
· Automatic system operation status
Man
· If you do not want to output the value and status from IN
or if the value or status thus output is not preferable, you
can manually transmit the value to OUT.
A3.2.2 MIN_GOOD Handling
If there is no selectable input or if the number of selectable inputs is less than the value of MIN_GOOD, SELECTED
becomes “0.”
A case where the number of valid INs is less than the value of MIN_GOOD:
FA0302.EPS
OUT = certain retained
value that was
output previously
IN_1 = 23
SELECT_TYPE = Middle
STATUS_OPTS
MIN_GOOD = 3
SELECTION
SELECTED = 0
IN_2 = 34.5
IN_3 = 45
IN_4 = 2.34
IN_5 = 23.6
IN_6 = 15.5
IN_7 = 32.5
IN_8 = 27.4
DISABLE_1 = ON
DISABLE_2 = ON
DISABLE_3 = OFF
DISABLE_4 = ON
DISABLE_5 = OFF
DISABLE_6 = ON
DISABLE_7 = ON
DISABLE_8 = ON
OP_SELECT = 1
Figure A3.2 Example (1)
This example restricts the valid inputs using DISABLE_n, and the inputs are enabled only at DISABLE_3 and
DISABLE_5. Because the effective number of MIN_Good is 3, the input specified by OP_SELECT will not be
output.
