FVP 110 Fieldbus Valve Positioner Manual
174
GE Energy
Positioner Signature The positioner signature is the setpoint input-to-position charac-
teristics of the positioner, measured at points in equal intervals
within a specified range over a round trip.
The positioner signature reflects the positioner Cv characteristics,
cutoff level, and limits, allowing the positioner setting conditions
to be ascertained. The following is settable for the
POSITIONER_SIGN_SET:
Lower Setpoint [%]
Upper Setpoint [%]
Intervals [points]
Recommended Wait Time [seconds] (read-only)
Wait Time [seconds]
Performing measurements sets the setpoint in SIGN_DATA_X
and the position data (%) in SIGN_DATA_Y.
For the intervals, set the number of points of measurement in the
increasing direction within the range of 4 through 20. The total
number of points of measurement in a round trip results in:
Intervals 2 + 1.
For the wait time, set the retention time at each point of measure-
ment. For example, provided the lower setpoint is set to 0, the
upper setpoint to 100, and the intervals to 10, the points of mea-
surement are 0, 10, 20, …90, 100, 90, 80, …10, and 0, totaling 21
points.
*1: Applicable for Single Acting type with Code /BP.
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