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eWON General Reference Guide - eWON wiki

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6.1.4 Real time graph<br />

If a real time recording is enabled for a Tag, a small icon will appear next to its name:<br />

<strong>General</strong> <strong>Reference</strong> <strong>Guide</strong> Monitoring Web Interface<br />

This small icon is an hyperlink to show the graph picture. When the link is clicked, another window will open and after a small delay (about 3<br />

seconds), a graph will be displayed:<br />

This graph displays the whole real time window.<br />

Important: If the main explorer window hides the real time window, clicking again on the real time graph hyperlink will not bring it<br />

forward. You should bring it forward manually.<br />

6.1.5 Historical window<br />

A check box may also appear in the first column of the View I/O screen meaning that you can choose this Tag to view its historical trend. It<br />

appears only if the historical logging has been enabled in the Tag description (see chapter “Tag Setup” on page 75).<br />

6.2 Historical Trending screen<br />

Warning: depending on the <strong>eWON</strong>'s version - c.f. table at the end of this manual.<br />

From the real time screen, users can select Tags (providing that the historical logging has been enabled for those Tags) by clicking on the related<br />

checkbox and request a graph for these Tags by clicking on the Show Graph for selection link above the real time tabs. Up to 4 Tags can be<br />

selected at the same time to be plotted on the graph.<br />

Figure 125: <strong>eWON</strong> historical trend configuration - 1<br />

RG-001-0-EN ver 1.14 <strong>eWON</strong>® - 02/05/2012 - ©<strong>eWON</strong> sa Page 165

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