Yokogawa YVP110 - Manual (Page 108)

<19. Diagnostics>
19-4
IM 21B04C01-01E
(5) Positioner Signature
The positioner signature is the setpoint (input)-to-
position characteristics 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, thus allowing the positioner setting conditions
to be ascertained.
• The following can be set in a setting parameter
POSITIONER_SIGN_SET:
Lower Setpoint [%]
Upper Setpoint [%]
Intervals [points]
Recommended Wait Time [seconds]
(read-only)
Wait Time [seconds]
• Performing measurement 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 measurement. For example, provided
the lower setpoint is set to 0, the upper setpoint
to 100, and the intervals to 10, the points of
measurement are 0, 10, 20, …90, 100, 90, 80,
…10, and 0, totaling 21 points.
*1: Applicable for Single Acting type with Code /BP.
19.3.3 Signature Measuring Result
The signature measuring result will be displayed to SIGN_MEAS_RESULT. While signature measuring is
running, “In operation” is displayed.
Table 19.1 Signature Measuring Result
Code Message Description
1 Succeeded Signature measuring has succeeded.
2 Canceled Signature measuring has been canceled.
10 Measure Actuator warning While Standard Actuator Signature is running or preprocessing of
other Signature, warning has occurred.
20 Measure Extended Actuator warning While Extended / High Resolution Actuator Signature is running,
warning has occurred.
30 Measure Step Response Test warning While Step Response Test is running, warning has occurred.
40 Measure Positioner warning While Positioner Signature is running, warning has occurred.
100 Measure Actuator error During Signature preprocessing, error has occurred.
255 In operation Signature measuring is being executed.