Ready Access Access Air 100 Información técnica Pagina 31

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Figure 6: User Message: No Trend Data Available
Trend Module Limitations
The limitations of the Trend Module are as follows:
A maximum of 500 data points can be displayed for a single trended object. No data older than 2 years can be
displayed.
The trend data originates from the device’s online buffer; samples stored in a historical database such as the
JCIHistorianDB archive database are not included.
You can open only one Trend Module per graphic.
The Trend Module can chart a maximum of four trended Metasys objects. If you try to plot a fifth object, a user
message box appears (Figure 7).
Figure 7: User Message Example: Full Trend Module
The Trend Module does not support nested trend extensions. For example, the Trend Module cannot chart
totalization extensions that contain a trend extension.
You cannot save the Trend settings for later use. Once you close the graphic, you need to select the objects for
the trend module again.
Refresh Function
The Trend Module does not automatically refresh with new data samples. Use the refresh button to display the latest
trend data within the Trend Module.
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