What Are Trends?

1.	What Are Trends?
Answer» Trends means graphical representation of data. “Real-time” and “Historical. You can configure both TREND objects to display graphical representations of multiple tagnames over time. Real-time trends allow you to chart up to four pens (data values), while Historical trends allow you to chart up to eight pens. Real-time trends are dynamic. They are updated continuously during runtime with whatever time span GIVEN in configuration. You can not scroll the real-time trends to see previous data. Historical trends PROVIDE you with a “snapshot” of data from a time and date in the past. They are not dynamic. UNLIKE real-time trends, historical trends are only updated when they are instructed to do so either through the execution of a QuickScript or an ACTION by the operator, for example, clicking a button. You can zoom in / zoom out the trends. You can also access the previous data.

Answer»

Trends means graphical representation of data.
“Real-time” and “Historical. You can configure both TREND objects to display graphical representations of multiple tagnames over time. Real-time trends allow you to chart up to four pens (data values), while Historical trends allow you to chart up to eight pens.
Real-time trends are dynamic. They are updated continuously during runtime with whatever time span GIVEN in configuration. You can not scroll the real-time trends to see previous data.
Historical trends PROVIDE you with a “snapshot” of data from a time and date in the past. They are not dynamic. UNLIKE real-time trends, historical trends are only updated when they are instructed to do so either through the execution of a QuickScript or an ACTION by the operator, for example, clicking a button. You can zoom in / zoom out the trends. You can also access the previous data.

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