Transducer Block
December 2009
4-39
For instruments with relay A or C If increasing air
pressure at output A causes the shaft to turn
clockwise, enter Clockwise. If it causes the shaft to
turn counterclockwise, enter Counterclockwise.
For instruments with relay B If decreasing air
pressure at output B causes the shaft to turn
clockwise, enter Clockwise. If it causes the shaft to
turn counterclockwise, enter Counterclockwise.
Lever Style
Enter the lever style (LEVER_STYLE [85.10]) for
rotary actuators as either Pivot Point or Rack and
Pinion.
Lever Arm Length
Defines the lever arm length (MOMENT_ARM [85.11])
for rotary actuators.
Effective Area
Enter the actuator effective area (EFFECTIVE_AREA
[85.2]) in in
2
, cm
2
, or mm
2
.
Air
Select Opens or Closes, indicating the effect of
increasing air pressure (AIR [85.3]) on the valve travel.
Upper Bench Set
Enter the upper actuator operating pressure
(UPPER_BENCH_SET [85.5]).
Lower Bench Set
Enter the lower actuator operating pressure
(LOWER_BENCH SET [85.4]).
Nominal Supply Pressure
Enter the nominal instrument supply pressure
(NOMINAL_SUPPLY PRESSURE [85.6]).
Spring Rate
Enter the actuator spring rate (SPRING_RATE [85.7])
in lbsin or Nm.
Reference
Trim Style 1
Enter the valve trim style (TRIM_STYLE_1 [84.9]).
Trim Style 2
Enter the valve trim style (TRIM_STYLE_2 [84.10]).
Stroking Time Open
Enter the time required to stroke the valve from closed
to open (STROKING_TIME_OPEN [85.8]).
Stroking Time Close
Enter the time required to stroke the valve from open
to close (STROKING_TIME_CLOSE [85.9]).
MAI Channel Map
(TB > Configure/Setup > Detailed Setup > MAI
Channel Map)
Allows the user to specify which transducer block
parameter is available through each of the MAI Block
channels (MAI_CHANNEL_1 through
MAI_CHANNEL_8 [95.1 through 95.8]). Transducer
block parameters available to each channel:
11 = FINAL_VALUE
12 = TRAVEL_TARGET
13 = FINAL_POSITION_VALUE
14 = TRAVEL
15 = SUPPLY_PRESS
16 = ACT_PRESS_A
17 = ACT_PRESS_B
18 = ACT_PRESS_DIFF
19 = DRIVE_SIGNAL
10 = TRAVEL_DEVIATION
11 = TEMPERATURE
12 = CYCLE_COUNT
13 = TRAVEL_ACCUM
4
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