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YME Engineering Course

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P. TREND DEFINITION

P. TREND DEFINITION

The Trend Recording acquires process data such as temperature, pressure and

flow rate gathered by an HIS, as the function block’s tuning parameter and

displays changes in the acquired data in a graph (trend graph).

P.1. FLOW OF THE TREND RECORDING

The Trend Recording consists of:

♦ Trend Data Acquisition

♦ Trend Data Display

♦ Closing Processing

Figure: Flow of the Trend Recording

P.2. STRUCTURE OF TREND

The Trend Recording has a three-layer structure: a trend block, Trend window

and Trend Point window.

YME Training Center

P-1

CS3KR3-ENG 1 ST Edition Jan 2002

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