Creates the
PmgCanvas object configured as trend of current value.
This object renders a simple "trend" (time progression) of the variable. The progression is rendered continuously, i.e. in a specific time a portion of the image is rendered according to the current value of the variable. It is not necessary to save the historical values (
PmaTrendGroup object is not needed). So keep in mind that in such case all data is lost once the panel is closed.
This preconfiguration can be activated when
creating a new Pmg object.
This preconfiguration is included in the
"/ Chart, functions" group.
This object contains embedded
PmgCanvas object named "
Dynamic". The item contains the
variable Item1NewVal of the
Double type that can be connected to the measured value by
data binding.
In the
PmgCanvas object, there are
variables minX,
maxX,
minY,
maxY,
spaceX and
spaceY. These variables define the scale range in both
x and
y axes and also the offset of axes from left and bottom edge of the
Pmg object.
Additional configuration variables are located at the beginning of
context itself, or at the beginning of designer method. The following items can be set:
- colorScale color of ticks and scale descriptions
- nMajY number of main ticks on Y-axis
- nMinY number of minor ticks (between two main ticks) on Y-axis
- nDescPer specifies the quantity of displayed descriptors of main ticks (0 = no, 1 = every main, 2 = every second main)
- nMajX number of main ticks on X-axis
- nMinX number of minor ticks (between two main ticks) on X-axis
- colorArea background color of the graph rendering area
- colorGrid grid color
- nGridPer specifies quantity of displayed horizontal/vertical grid lines (0 = no, 1 = every main, 2 = every second main)
- nTextSize scale description text size
The parent object contains
TimeRangeSec variable where the time range of X-axis is defined (in seconds).
These configurators can be set before the preconfiguration is created:
| The name of created object | Name (identifier) of the Pmg object. It is used for obtaining the Pmg object by the PmgObject.Items method.
This configurator sets the initial value of the Name property.
The maximum name length is 30 characters.
This is a system name, so it must contain only alphanumeric and must not contain any diacritics (i.e. national dependent characters), empty string, spaces and first character must not be a number. |
|---|
| Number of trends | The number of trend variables |
|---|
|
| 1. trend | |
|---|
| Measured value | Connection to measured value |
|---|
| Range from minimum (y) | Lower limit of Y-axis |
|---|
| Range to maximum (y) | Upper limit of Y-axis |
|---|
| Graph line color | Graph line color |
|---|
| Chart type | Chart type
0=hidden
1=linear
2=stairs |
|---|
|
| 2. trend | |
|---|
| Measured value | Connection to measured value |
|---|
| Range from minimum (y) | Lower limit of Y-axis |
|---|
| Range to maximum (y) | Upper limit of Y-axis |
|---|
| Graph line color | Graph line color |
|---|
| Chart type | Chart type
0=hidden
1=linear
2=stairs |
|---|
|
| Time axis range (s) | Range of the time axis (x) in seconds.
10
15
20
30
60
120
300 |
|---|
| Data emulation in control variable binding | Emulated data will be generated in the control variable |
|---|