Fisher FIELDVUEDVC6200f Instruction Manual page 318

DVC6200f Digital Valve Controller
DI Function Block
February 2017
the detected position. Figure E‐29 illustrates the operation of the proximity detection function. Travel Alert Point
refers to Travel Lo Alert Point, Travel Hi Alert Point, Travel Lo Lo Alert Point, and Travel Hi Hi Alert Point in table E‐39.
Travel Alert Deadband refers to Travel Lo Alert Deadband, Travel Hi Alert Deadband, Travel Lo Lo Alert Deadband, and
Travel Hi Hi Alert Deadband in table E‐39.
Figure E‐29. Discrete Input Proximity Detection Function
DISCRETE INPUT SET
0= Not Active, 1= Active
Table E‐39 lists the transducer block parameters used for proximity detection with DI block channels 30 through 33.
Table E‐39. Transducer Block Parameters Used with Discrete Input Function Block Channels 30 through 33
Transducer Block Parameter
Travel Lo Lo Alert Point
Travel Lo Lo Alert Deadband
Travel Lo Alert Point
Travel Lo Alert Deadband
Travel Hi Alert Point
Travel Hi Alert Deadband
Travel Hi Hi Alert Point
Travel Hi Hi Alert Deadband
Field Value Processing
The Invert bit of the IO_OPTS [13] parameter may be used to logically invert the value of FIELD_VAL_D [17] before it is
stored as PV_D [7]. PV_FTIME [16] may
be used to set the length of time that FIELD_VAL_D [17] must be in a new state before that new state is reflected in
PV_D. The PV_D [7] value goes to the mode switch where it becomes OUT_D [8] when the actual mode is AUTO.
OUT_D [8] is also tested for an alarm state.
Note
Invert is the only I/O option that the DI block supports. You can set the I/O option only when the block mode is Out of Service.
318
DISCRETE INPUT
CLEARED
DEADZONE, 1% OF TRAVEL
TRIGGER POINT FOR DOWNWARD VALVE
TRAVEL DETERMINED BY TRAVEL ALERT
DEADBAND
CENTER POINT OF PROXIMITY DETECTION
DETERMINED BY TRAVEL ALERT POINT
TRIGGER POINT FOR UPWARD VALVE TRAVEL
DETERMINED BY TRAVEL ALERT DEADBAND
Lo Lo Proximity Detection Center Point
Lo Lo Proximity Detection Width
Lo Proximity Detection Center Point
Lo Proximity Detection Width
Hi Proximity Detection Center Point
Hi Proximity Detection Width
Hi Hi Proximity Detection Center Point
Hi Hi Proximity Detection Width
Instruction Manual
Parameter Function
D103412X012