Fisher FIELDVUE DVC6200f Instruction Manual page 120

Detailed Setup—AO Function Block
July 2013
Figure 4‐8. Analog Output Function Block Timing Diagram
CAS_IN, 2
1 macrocycle
OUT
TRANSDUCER BLOCK
TRAVEL TARGET
SP
B2718‐1
Action On Fault Detection
To define the action you wish the valve to take when the block is in CAS mode, and the CAS_IN [17] input detects a
communication failure, or is commanded to go to fault state by the upstream block or the resource block, configure
the following parameters:
IO_OPTS [14]: Determines the action OUT [9] will take upon a fault state. If the IO_OPTS [14] "Fault State to Value" is
not selected, then OUT [9] holds its last position when Fault State is set. If "Fault State to Value" is selected, OUT [9]
goes to the FSTATE_VAL [24] value when Fault State is set.
FSTATE_TIME [23]: The length of time, in seconds, that the AO block will wait to set Fault State. When Fault State is
set, the OUT [9] value goes to either the FSTATE_VAL [24] value or holds its last position, depending on I/O_OPTS [14].
When the block has a target mode of CAS, a fault condition will be detected if the CAS_IN [17] has a BAD status or an
Initiate Fault State substatus is received from the upstream block.
FSTATE_VAL [24]: Determines the OUT [9] value if IO_OPTS "Fault State to Value" is selected. The OUT [9] value
transitions to FSTATE_VAL [24] after FSTATE_TIME [23] elapses and the fault condition has not cleared.
I/O Options
The I/O options parameter (IO_OPTS [14]) allows you to select how the I/O signals are processed. You can set I/O
options in Out of Service mode only. The following I/O options are available in the AO block:
Use PV for BKCAL_OUT—Changes the BKCAL_OUT [25] value to the PV [7] value. When the Use PV for BKCAL_OUT
option is not enabled (False), the BKCAL_OUT [25] value is the working setpoint value.
Target to Man if Fault State Activated—Set the target mode to Man, thus losing the original target, if Fault State is
activated. This latches an output block into the manual mode.
118
SP RATE UP
1 second 1 second
1 macrocycle
SP RATE DN
1 second 1 second
Instruction Manual
D103412X012
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