Analog Output Function Block - Fisher FIELDVUEDVC6200f Instruction Manual

Instruction Manual
D103412X012
Analog Output Function
Overview
The Analog Output (AO) function block (figure E‐1) assigns an output value to a field device through a specified I/O
channel. The block supports mode control, signal status calculation, and simulation. Figure E‐1 illustrates the internal
components of the AO function block, and table E‐2 lists the definitions of the block parameters. The digital valve
controller measures and uses actual valve position for READBACK [16].
Figure E‐1. Analog Output (AO) Function Block
CAS IN
READBACK
CAS IN = The remote setpoint value from another
function block.
BKCAL OUT
BKCAL IN input of another block to prevent reset
windup and to provide bumpless transfer to closed
loop control.
OUT The block output and status.
=
READBACK
B2716‐1
Note
The AO block actual mode will not move to Auto unless:
D
Resource Block actual mode is Auto, and
D
AO SHED_OPT [27] is set to a non‐zero value.
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.
BlockE‐
BKCAL OUT
AO
OUT
The value and status required by the
=
= Actual valve position.
Emerson Automation Solutions sales office
DVC6200f Digital Valve Controller
to upgrade product licensing.
AO Function Block
February 2017
209