Discrete Output Function Block Schematic; Valve Set Point For Discrete State - Emerson Fisher Fieldvue DVC6030f Instruction Manual

DVC6000f Series
CAS_IN_D
5
states used by the digital valve controller for the set
point.
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.
5-148
RCAS_OUT_D
RCAS_IN_D
SP_D
IO_OPTS
MODE
SIMULATE_D
SHED MODE
Figure 5-29. Discrete Output Function Block Schematic
PV_D
CONVERT AND
STATUS
CALCULATION
READBACK_D
CHANNEL
TRANSDUCER
TRANSDUCER
BLOCK FEEDBACK
BLOCK
Table 5-69. Valve Set Point for Discrete State
Valve Set Point with
Discrete State
IO_OPTS Invert = 0
0
1
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
95
100
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
BKCAL_OUT_D
OUT_D
Valve Set Point with
IO_OPTS Invert = 1
Closed Open
Open Closed
5% Closed
10% Closed
15% Closed
20% Closed
25% Closed
30% Closed
35% Closed
40% Closed
45% Closed
50% Closed
55% Closed
60% Closed
65% Closed
70% Closed
75% Closed
80% Closed
85% Closed
90% Closed
95% Closed
Open Closed
March 2006