YME Engineering Course

P. TREND DEFINITION
other consoles are displayed in accordance with that defined in the original
console.
P.4.4 DATA TYPE
The display data type of each trend gathering pen is defined to display data in
the Trend window. The data display for the trend gathering pen include the
following types:
♦ Default
Acquired data are displayed in the default data type in the instrument
faceplate showing the function block of the acquisition source.
♦ Analog type
Acquired process data are displayed in the data axis range 0 to 100 % of
the trend graph.
♦ Discrete type
Acquired ON/OFF data are displayed in the fixed data axis range 6 % of
the trend graph.
♦ Totalizer value (analog type)
Acquired process data are displayed in the data axis range 0 to 100 % of
the trend graph. Process data acquired are not single-precision data but
double-precision data.
P.4.5 CLOSING DATA
To define the closing data, in the trend acquisition pen assignment builder, click
on view and select closing definition
♦ Hourly Closing
In the hourly closing data process, the trend data of the previous one hour
are gathered from the saved trend data file, in which the trend gathering
pens specified for closing processing are also saved. The hourly closing
data such as the average, total, maximum and minimum values are
calculated for this one-hour based on the gathered valid data. The
calculated hourly closing data are stored into the hourly closing data files
created for each trend gathering pen. Hourly closing data process is
performed at the closing time of every hour. The number of data points
used for the hourly closing processing varies depending on the trend
sampling period.
• Trend of 1-minute sampling period
Trend of 1-minute sampling period creates the hourly data using 60
points of data.
• Trend of 2-minute sampling period
Trend of 2-minute sampling period creates the hourly data using 30
points of data.
• Trend of 5-minute sampling period
Trend of 5-minute sampling period creates the hourly data using 12
points of data.
YME Training Center
P-7
CS3KR3-ENG 1 ST Edition Jan 2002