Signatures And Relevant Parameters - GE FVP110 Maintenance Manual

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Signatures and Relevant Parameters

The following describes each signature and the relevant parameters.
Standard Signature *1 The standard signature is the fundamental input-to-position valve
Extended Actuator
Signature *1
1 Current: Standard Actuator Signature
2 Current: Extended/High Resolution Actuator Signature
3 Current: Step Response Test
4 Current: Positioner Signature
5 Factory: Standard Actuator Signature (result stored in non-volatile
memory)
6 Record: Standard Actuator Signature (result stored in non-volatile
memory)
If the number of the measured data is 20 or more, specify in
NOTE
SIGN_UPLOAD_POINTER the leading position of the data for
upload. For example, setting 21 in
SIGN_UPLOAD_POINTER uploads the twenty-first through
fortieth data. Refer to the value of SIGN_MEAS_COUNTER,
which indicates the number of data actually measured.
characteristic, measured at 10% through 90% of the full stroke in
10% intervals over a round trip. The following is settable in
STD_ACT_SIGN_SET:
❑ Recommended Scan Time [seconds]
Scan Time [seconds]
❑
Deviation Margin [%]
❑
Performing measurements sets the pressure data in
SIGN_DATA_X and the position data (%) in SIGN_DATA_Y.
To save the signature to FVP110 non-volatile memory:
Select 2 (Save as a Factory data) or 3 (Save as record
❑
data) in SIGN_DATA_SAVE and save. The standard
signature previously saved is overwritten.
Save the signature data taken at the installation as a Factory data
and that of the latest measurement as a Record data.
The extended actuator signature is the valve input-to-position
characteristics, measured at arbitrary positions within the full
stroke of the valve. As for the positions of measuring, 50 points
can be specified for each valve direction, totaling 100 points. The
following is settable in EXT_ACT_SIGN_SET:
Lower Setpoint [%] (point to start the measurement)
Upper Setpoint [%] (point to finish the measurement)
Recommended Scan Time [seconds]
FVP 110 Fieldbus Valve Positioner Manual
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