Instruction Manual
D103412X012
Detailed Setup—DO Function Block
July 2013
193
Table 4‐70. Valve Set Point for Discrete State
Discrete State Valve Set Point with IO_OPTS Invert = 0 Valve Set Point with IO_OPTS Invert = 1
0 Closed Open
1 Open Closed
5 5% Closed
10 10% Closed
15 15% Closed
20 20% Closed
25 25% Closed
30 30% Closed
35 35% Closed
40 40% Closed
45 45% Closed
50 50% Closed
55 55% Closed
60 60% Closed
65 65% Closed
70 70% Closed
75 75% Closed
80 80% Closed
85 85% Closed
90 90% Closed
95 95% Closed
100 Open Closed
To further customize the output, configure the following supported I/O options: SP tracks PV in Man,
SP tracks PV in LO, SP Track retained target in Man or LO, Fault State to Value, Use Fault State value on restart, Target
to Man if Fault State activated, and US PV for BKCAL_OUT.
Note
You can configure the supported I/O options in Out of Service mode only.
The SP_PV Track in Man option permits the set point to track the process variable when the block is in Manual mode.
With this option enabled, the set point (SP_D [8]) becomes a copy of the process variable
(PV_D [7]), and a manually‐entered SP_D [8] value is overwritten on the block's next execution cycle. This option can
prevent a state change when transitioning from Manual to Automatic mode. You can disable this option in Manual or
Out of Service mode only.
The Invert option inverts the set point at SP_D [8] before it is stored in OUT_D [9]. With this option enabled, OUT_D
[9] becomes an inverted copy of SP_D [8] where non‐zero values of SP_D [8] are considered a logic 1. With this option
disabled, OUT_D [9] is a direct copy of SP_D [8]. The readback value is processed through the Invert option to become
PV_D [7]. The Use PV for BKCAL_OUT option specifies that BKCAL _OUT equal the value of the process variable (PV_D
[7]) instead of the set point (SP_D [8]). If you do not enable this option, BKCAL_OUT will equal SP_D [8].
Output Block PV Status
The Output Block PV Status is determined by the value of the PlantWeb Alerts Set PV Status parameter in the
transducer block (PWA_SET_STATUS [97]), the Transducer Block mode, and enabled Active PlantWeb alarms. Refer to
table 4‐11.
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