D2000 objects allowing graphic displaying the time course of monitored parameter values or parameter values development in time in the graph forms. Values rendered in the graph are selected from an archive data or rendered progressively as they are acquired from other processes.
Graphs are used for:
- displaying the measured values course in relation to a time line,
- comparing courses from multiple measured points,
- deducting measured values from displayed graphic courses,
- monitoring selected parameter values development in real time.
In the following preview, we will create a value also displayed in the graphic form.
- Creating a Calculated Point
- Displaying a Graph Point
- Inserting a Graph into a Scheme
- Sine Function Graph – Preview
- Creating a Sine Graph in HI
- Displaying a Second and a Sine Graphs
Creating a Calculated Point
Calculated Point is an object acquiring its value on the ground of a defined expression (equation). A calculated point administrator is a calculation process - SELF.CLC.
The calculated point is used for controlling output points, calculating derived values, for schema and graph display, archiving, alarm generation, etc..
Open CNF and create a calculated point.
After creating a calculation point, open GREDIT. There we will create a new scheme with a connected point.
Then we will create a graph for this point
Once a point has been created and a subsequent view is displayed, we point to the graph. The graph is typical by being based and editing in HI environments. The chart can show multiple points at a time and compare the values of the displayed points. Each of the graph points can be assigned different settings.
Parameters - setting basic graph parameters - description, time parameters and turning off / off individual parts of the chart
Objects - configure the individual objects displayed in the chart. This section allows you to select objects that acquire values (calculated points, measured points, ...), color assignment, thickness, line type, etc. in the D2000 system.
Axis - configuration of the axis parameters used in the graph
Color - the ability to redefine the global color settings of each part of the chart
Logical groups - assigning a graph to logical groups
We open HI in wich we create a graph
We will display the created graph in "S.Second" scheme. Open GREDIT.
Creating the P.Sine is similar to creating a "Second" calculated point. In our example, we will also use a P.second created in the previous videos.
Since a calculated point is based on an expression, we will use the following:
This expression will cause to change Second to Sine
Open CNF and create a Sine calculated point