Appendix M. Continuous Valve Diagnostics Concept; Introduction - GE Baker Hughes Masoneilan SVI FF Installation And Operation Manual

Appendix M. Continuous Valve Diagnostics Concept

Since its introduction about 20 years ago, FOUNDATION fieldbus has been well accepted by
customers for the opportunity it provides for device diagnostics. The device health and status
are even more important for the final control elements used in a controlled process –
positioners, and analog and discrete output devices.
This document describes the diagnostic features integrated in the SVI FF advanced diagnostic
positioner and provides some guidelines how they can be used in applications.

Introduction

Evaluation of the valve/positioner state requires:
1. Appropriate conditions to collect informative data
2. Data collection
3. Data processing
Different measures to estimate the valve health may require different conditions, rate of data
collection and often put special requirements on the amount of data collected and speed of
data processing. In order to provide the best information, the SVI FF provides three different
diagnostic approaches:
"Off Line Diagnostics" on page 232: Gives a short description of this topic.
"On Line Diagnostics" on page 232: Gives a short description of this topic.
Continuous diagnostics: Gives a detailed descriptions on how continuous diagnostics can
be used for estimation of the device status.
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