Discrete Output Function Block - Fisher FIELDVUEDVC6200f Instruction Manual

Instruction Manual
D103412X012

Discrete Output Function Block

Overview
The Discrete Output (DO) function block (figure E‐25) processes a discrete set point and outputs it to the specified I/O
channel to produce an output signal. The DVC6200f digital valve controller discrete output block provides both
normal open/closed control and the ability to position the valve in 5% increments for coarse throttling applications.
The digital valve controller measures and uses actual valve position for READBACK_D [16].
Figure E‐25. Discrete Output (DO) Function Block
CAS_IN_D
CAS IN D= The remote set point value from another function block.
BKCAL OUT D = The value and status required by the
BKCAL IN D input of another block for output tracking.
OUT_D = The block output and status.
READBACK_D = Actual valve position
The DO block supports mode control and simulation. In operation, the DO function block determines its set point and
sets the output. The transducer block provides a readback signal of actual position from the instrument. Figure E‐25
illustrates the primary inputs and outputs of the DO function block, figure E‐26 illustrates the internal components of
the DO function block. Table E‐35 lists definitions for the function block parameters.
When setting up the DO block, CHANNEL [18] must be set to 22, and SHED_OPT [23] must be non‐zero.
Note
Actual Block Mode (MODE_BLK.ACTUAL [5.2]) will remain out of service and the block cannot be scheduled if the block has not
been licensed. Contact your
Note
Actual Block Mode (MODE_BLK.ACTUAL [5.2]) will remain in IMAN and the block Readback status will be Bad - Not Connected if
the Output Block Selection is set incorrectly. From the transducer block method Outblock Selection, select the desired output
block, see page 54.
BKCAL_OUT_D
DO
OUT_D
READBACK_D
Emerson Automation Solutions sales office
DVC6200f Digital Valve Controller
to upgrade product licensing.
DO Function Block
February 2017
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