Emerson VSG & VSSG Guide de dépannage télécharger pdf (Page 66)

VSG/VSSG • Compact Logix PLC Manual •Vilter/Emerson • 35391CL

The trend analysis screens display historic data of the last 300,000 records of analog values.

Trend Charts

The following historical chart periods are available by touching the buttons along the right side of the

screen: 3 minutes, 15 minutes, 30 minutes, 1 hour, 2 hours, 6 hours, 12 hours, 1 day, 2.5 days, 5 days. *

Back button: Displays chart of previous period. For example, if the current 1 hour period is displayed and

the time is 11AM, pressing the Back button will display the logged data from 9AM to 10AM.

Forward button: Displays the chart of the next period. For example, if the 1 hour period of 4PM to 5PM

is displayed, pressing the Forward button will display the data of 5PM to 6PM provided that data exists.

Home button: Returns display from any displayed period to current period time with current time

oriented to the left side of the chart. For example, if the real time is 7 PM and the chart is displaying the

period of 7PM to 8PM. After pressing the End button, the chart will continue to update.

End button: Returns display from any displayed period to current period with current time oriented to

the right side of the chart. For example, if the real time is 7PM and the chart is displaying the period of

1PM to 2PM, pressing the End button will display the period of 6PM to 7PM. After pressing the End but-

ton, the chart will continue to update with the time period moving later per real time.

Pause button: freezes the chart of period at the current time. Touch the Pause button again to activate

the chart to update at the real time.

Next Pen button: Displays the individual scaling of each pen along the Y-axis of the chart. The scaling is

colored the same as the pens which are shown on the chart legend. This is useful on Page 2 of the chart

of motor amperage, capacity, and volume since the amp scale would typically require a larger range

than 0-100 whereas the capacity and volume will remain within 0 to 100 (%.) This allows the viewer to

easily observe the relationship between data.

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Emerson VSG & VSSG Guide de dépannage Page 66