ST Trend is used to compare a reference graph with a real-time graph.
(1) Object Style
Configures the background color of the Trend object. The background indicates the object area except the grid, X-Axis, Y-Axis, and pens.
Item | Description |
Color | Selects the object’s background color. You may select one from the 98 available colors. |
(2) Line Color
Item | Description |
Line Color | Changes the line color of the object. You may select one from 98 available colors. |
(3) Pen
Assign the tags to draw a reference graph. You must assign real tags. A series of addresses according to the data count will be allocated starting from the assigned pen’s address. Since the reference graph needs X- and Y-coordinates, a single point requires two-word addresses. Therefore, the address will be assigned as shown below.
In this tab, you may assign the tags to monitor in the Trend object . In case of the ST Trend, you may configure up to 8 pens. Each pen may display up to 2048 data points.
Item | Description | |
Tag Name | Assign a tag name to monitor. You may manually enter the tag name in the field or select the number button on the left to bring up the [Pen] window.  | |
Addr | Assign the device address to be monitored. Select the data type and I/O device, then press the | |
Tag | Assign the tag to be monitored. You may manually enter the tag name or press the | |
Comment | Enter the detailed comment of the pen. This field must be filled in. The comment will be used instead of the tag name in the graph. | |
Min Value | Enter the minimum value which will be displayed on the graph. If you do not enter a value, this field will be set as the minimum value of the tag. | |
Max Value | Enter the maximum value which will be displayed on the graph. If you do not enter a value, this field will be set as the maximum value of the tag. | |
Pen Color | You may set a pen color. You may choose one from the 98 available colors. | |
Color | You may set a pen color. You may choose one from the 98 available colors. | |
button to configure the detailed address.(4) Data Count Tags
The data count tags are used to decide the number of consecutive addresses after the assigned pen. In other words, the number of data count tags must be equal to the number of the pens. The data count tags’ values must be an even number. If an odd number is assigned, 1 will be subtracted from the value and applied to the graph.
Item | Description |
Addr | Assign the device address to be referenced. Select the data type and I/O device then press the |
Tag | Assign the tag to be referenced. You may manually enter the tag name or press the |
(5) Grid
Item | Description |
Display Grid | Shows or hides the grid. |
X-Axis Grid No. | Assign the number of grids on X-axis. You may assign from 1 to 99 grids. |
Y-Axis Grid No. | Assign the number of grids on Y-axis. You may assign from 1 to 99 grids. |
Color | You may set a grid color. You may choose one from the 98 available colors. |
(6) Y-Axis Legend
Item | Description |
Display Min / Max Value | Shows or hides the min/max value of the pen on Y-Axis. |
Size (Pixels) | Configures the size of the text displayed on the Y-Axis. You may assign the value from 0 to 1024. |
(7) X-Axis Legend
Item | Description |
Display Min/Max Value | Shows or hides the min/max value on the X-Axis. |
Format | Select the time display format. You may select one from the following options: |
(8) ST Option
Item | Description |
Trace Point Color | You may set a trace point color. You may choose one from the 98 available colors. |
Size (Pixels) | Configures the size of the trace point. You may assign the value from 0 to 1024. |
Data Point Size (Pixels) | Configures the size of the data point. You may assign the value from 0 to 1024. |
Draw Border | Shows or hides the border of the graph. |
(9) ST Tag
Item | Description |
ST-Control Bit | The assigned digital tag will display the state of data reception when the graph is updated. In the case of ongoing data reception, the assigned tag will be set (1). When the process is completed, the tag will be reset (0). |
ST-Control | Assign a tag to control the graph update of the ST Trend. The object will be updated according to the value assigned to the ‘ST-Control’. 1: Overwrites a new graph on the existing graph. 2: Clears the current graph. 3: Clears and redraws the graph. 4: Starts ‘Trace’ operation (does not operate if there is no reference graph). 5: Pauses ‘Trace’ operation (maintains the accumulated data). 6: Stops ‘Trace’ operation (does not maintain the accumulated data). |
ST-Trace Point | Assign a tag or an address to draw the Trace graph. When the tracing operation starts, up to 2048 tag values will be stored in the buffer and displayed on the graph. |
ST-Minimum Value | Assign a tag or an address to define the minimum value of the graph. If the minimum value is greater than the maximum value, the graph will not be updated. You can also select the ‘Using Fixed Val.’ option to manually enter the value. If the value is smaller than 0, the graph will not be drawn. |
ST-Maximum Value | Assign a tag or an address to define the maximum value of the graph. If the maximum value is smaller than the minimum value, the graph will not be updated. You can also select the ‘Using Fixed Val.’ option to manually enter the value. If the value is smaller than 0, the graph will not be drawn. |
ST-Trace Display Time Tag | Assign a tag to use as the X-Axis time display. This value will be applied when the reference graph is updated. Only the real part of the value is used. You can also select the ‘Using Fixed Val.’ option to manually enter the value. If the value is smaller than 0, the graph will not be drawn. |
| - When the control tag’s value becomes 1 or 3 and the update starts, the system concentrates on the data reading. This may cause the delay to the other operations (opening a page, writing tag value, etc.). It is recommended to operate the project after the graph update. |