This section shows you how to configure a real-time graph for analogue data during live-monitoring or acquisition mode.
a) Open the protocol you wish to work within , and connect to RTServer on the ActiveHub/CodaHub.
b) On the protocol tree, expand the “ViewDefinitions” node to view “Live Graphs” and right-click on the node. This will show you the following pop-up menu,
c) Select “Add New” to create a new live graph definition,
d) Populate the “Name” textbox and click on the “+” button under the “All plots” section to add a new plot. You will now see a new pop-up dialogue box which will allow you to add channels to your graph,
e) Select the “+” button to add a channel to your plot. From the empty row that appears, select “Analog” for the Group column. Select one of the available channel names from the Channel column drop-down list. Select “Value” from the drop-down list on the Dim column. Select “value” from the drop-down list on the Field column. Choose a plot colour by double-clicking on the Colour column and selecting a colour from the palette. You can add multiple channels to your plot. Click on OK to close this window and get back to the Live graph definition dialogue,
f) The live graph definition dialogue has now been populated with the newly created plot. Each plot can contain multiple channels, while each live graph can contain multiple plots. Notice that the Ordinate Axis section is populated with axis information for each plot that you add. You can configure this similarly to playback-graphs. Selecting the “Auto” options under Type will automatically scale the ordinate axis on every screen-refresh. Alternatively, you can select “Manual” for the Type column and specify maximum and minimum ranges on the Y-axis. Click on the OK button to save the definition
g) The newly added live graph definition will now appear on the protocol tree. Select a pane from the current layout and launch the live graph view into the pane using the right-click menu “Launch” option, or by double-clicking on the definition itself,
h) Switch to “Live Mode” and select “Play” from the transport bar to start monitoring live data from RTServer or “Record” to begin acquiring data. You should now see an animated graph showing real-time data from the CodaHub/ActiveHub.
i) Here is an example of a live graph with multiple channels with an offset on the y-axis,
j) It is important to keep in mind that live graph data may contain aliasing artefacts. This is because live graphs display data sampled at 25 Hz. The data displayed by these graphs is not filtered or averaged. Configuration of the analogue board to acquire at a specific sampling rate has no effect on live graphs.