Yokogawa EJX930A - Manual (Page 98)

<Appendix 3. Input Selector (IS) Block>
A3-3
IM 01C25T02-01E
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.
Supported Mode Role
O/S
(Out of Service)
· System-stopped status.
· Allows you to make changes to configuration.
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.
Auto · Automatic system operation status.
Valid Input
When the following conditions are satisfied, the value of IN_n becomes valid.
1) The QUALITY in each status of IN_n is either Good (NC), Good (C), or Uncertain*
1, 3 .
2) The values of DISABLE_n corresponding to each IN_n are OFF and the QUALITY in the status of which is
either Good (NC), Good (C), or Uncertain* 1, 2 .
3) The number of inputs that are “good” is greater than the value of MIN_GOOD* 4 .
Note:
*1: Uncertain is applicable when “Use Uncertain as Good” is selected in the STATUS_OPTS parameter.
*2: If the status of DISABLE_n is Bad or Uncertain, its quality is lower so that the status of IN_n is also defined as lower quality. When
DISABLE_n is ON, the value of IN_n becomes invalid. For the priority of DISABLE_n is higher than that of IN_n.
Status in SELECT_TYPE except OP_SELECT
QUALITY of DISABLE / IN Status IN
Good (NC) Valid
Good (C) Valid
Uncertain *1 Valid
Uncertain Invalid
Bad Invalid
Condition: The number of inputs that are “good” is greater than the value of MIN_GOOD.
*3: Priority of IN_n when the same value is input.
Priority
1:Highest
8:Lowest
Input
1 IN_1
2 IN_2
3 IN_3
4 IN_4
5 IN_5
6 IN_6
7 IN_7
8 IN_8
*4: Refer to A3.2.2 for the details of MIN_GOOD.