TREND 963 Web User Guide - Manual (Page 32)

Using 963 From a Client
963 Web User Guide TC200685 Issue 4 15/01/2009 32
2. Right-click the value that is to be graphed and click Collect full precision log graph. If the value is being
logged by more than one plotting channel Collect full precision log graph will be replaced by Collect full
precision log graph point to Collect full precision log graph and click the required plotting channel. The
graph is displayed.
You can zoom in and out of the graph to make it easier to see the data. The graph’s data can be displayed as a list of
points, and recorded graphs can be played back.
To display a precision graph from a text mode schematic page:
1. Display the schematic page containing the value for which logged data is to be graphed as described in the
‘Display a Schematic Page’ section of this manual.
2. Click for the required plot.
4.5.4 Display a Precision Graph from the Device Viewer
Normally logged data from the controller will be sent in a compact format to save communications; however, to achieve
this some accuracy is lost. Precision graphs ensure complete accuracy but take longer to receive. Precision graphs of data
logged in IQ controllers can be displayed. Each graph can contain multiple traces of up to 1000 values.
When a precision log is requested the controller sends every value in the logging channel as an individual 6-digit
number. This allows for great accuracy but a reduced range of values (999 999 to –99 999, or .00001 to -.0001).
More importantly the transfer rate is much slower. For this reason users can limit the number of points retrieved for
a full-precision log collection and should not use this method to collect 1-second logs. This method would always be
the preferred method for meter readings as there is no loss of raw data.
To display a precision graph from the Device Viewer:
1. View the values that are to be graphed in the Device Viewer as described in the ‘Display the IQ System’
section of this manual. Values that can be graphed are indicated by a .
2. Right-click the value that is to be graphed and click Collect full precision log graph. If the value is being
logged by more than one plotting channel point to Collect full precision log graphs and click the required
plotting channel. To graph more than one value hold down the CTRL key and click the required values, and
right-click one of the values and click Collect full precision log graph. When graphing more than one
value 963 will use the first plotting channel for each value The graph is displayed.
You can zoom in and out of the graph to make it easier to see the data. The graph’s data can be displayed as a list of
points, and recorded graphs can be played back.
Note that this feature is only available accessing the 963 Server in graphic mode.
4.5.5 Display a Chart
963 allows a chart of values from a controller to be displayed.
To chart values:
1. Display either a compact graph, or a precision graph for the sensor that is to be charted as described in the
appropriate section of this manual.
2. On the Data menu click Chart points. The selected value(s) will now be charted at a refresh rate of 30s.
You can zoom in and out of the graph to make it easier to see the data. The graph’s data can be displayed as a list of
points, and recorded graphs can be played back.
Note that this feature is only available accessing the 963 Server in graphic mode, and is not supported for values
from BACnet devices.
4.5.6 Load a Graph Definition
The specifications about which traces appear on a graph, how the grid etc is set up can be saved as a definition on
the server. These set ups can be loaded later. The set up of the graph is retained, but the latest data will be displayed.
This saves time if there are graph traces that are viewed and analysed in the same way on a regular basis.
To load a graph definition:
1. Display the page containing the button that enables the graph set up to be loaded, as described in the
‘Display a Schematic Page’ section of this manual.
2. Click the button or graphic that displays the required graph set up.
Note that this feature is only available accessing the 963 Server in graphic mode.