GE FVP110 - Set Transducer Block Parameters; Position-To-Flow Rate Characteristic Type

FVP 110 Fieldbus Valve Positioner Manual
64
GE Energy
Set Transducer Block Parameters
Set the following parameters as necessary. For the settings made as default when
shipped, see the parameter lists in “Function Block Parameters” on page 183.
1. Write the Position-to-flow Rate Characteristic Type.
The parameter POSITION_CHAR_TYPE defines the characteristics between the valve
position and flow rate, and is set to linear by default. Write the appropriate value:
❑ 1 = linear
❑ 2 = equal percent (50:1)
❑ 3 = equal percent (30:1)
❑ 4 = quick open (reversal of equal % - 50:1)
❑ 5 = Camflex Percentage
❑ 255 = user-defined
255 allows you to define the desired characteristics by 10 line segments for evenly
divided input levels. The coordinates (0,0) and (100,100) are fixed; set the values
corresponding to OUT (Output of AO block) = 10%, 20%, 30%..., 80%, 90%.A set value
must be greater than the preceding set value; the output must increase as the input
increases (Figure 38).
Figure 38 Position-to-flow Rate Characteristic Type
2. Set Final-value Limits.
Eu_100 and Eu_0 in the parameter FINAL_VALUE_RANGE define the upper and lower
limits of FINAL_VALUE.value of the transducer block.
NOTE Even if the range of FINAL_VALUE.value is limited by
FINAL_VALUE_RANGE, the actual valve position is set to
outside the FINAL_VALUE_RANGE setting when the
tight-shut or full-open action described below is activated.