GE Baker Hughes Masoneilan SVI FF Installation And Operation Manual page 18

Alarm/Alert Causes
Some causes of alarms/alerts include:
Low Supply Pressure
Obstacle
Valve Sticking
Position HI HI: Position Feedback Slip
Position LO: Process out of range
Trends
There are three trends available in the ValVue FF DTM or using a handheld device:
Travel Accumulation Trend
Cycle Counter Trend
Position Error Trend
Histograms
There are two histograms available in the ValVue FF DTM or using a handheld device:
Position Histogram
Position Error Histogram
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Displays travel accumulation for the following areas:
Yearly Travel Accumulation Trend (%)
Monthly Travel Accumulation Trend (%)
Weekly Travel Accumulation Trend (%)
Daily Travel Accumulation Trend (%)
Displays cycle counter accumulation for the following areas:
Yearly Cycle Counter (Counts)
Monthly Cycle Counter (Counts)
Weekly Cycle Counter (Counts)
Daily Cycle Counter (Counts)
Displays a trend of average error over time. for the following areas:
Yearly Average Error Over Time
Monthly Average Error Over Time
Weekly Average Error Over Time
Daily Average Error Over Time
Displays how many cycles are spent in each 10% position increment
and to you can reset the total operating time for the histogram.
Displays the position error as function of position and you can reset
the histogram.
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High friction
Bad Tuning
Position Alerts
Position HI: Process out of range or Control
Loop is not tuned
Position LO LO: Position Feedback Slip