SPC Trend is used to display the data stored in the PLC at once, in a graph. It is similar to the Scope Trend but the difference is that the SPC Trend can designate the data on the X-Axis. In other words, each point is assigned an X and Y coordinate. Thus, the graph is not drawn in regards with regard to time.
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(1) Object Style
Configures the background color of the Trend object. The background indicates the object area except for the grid, X-Axis, Y-Axis, and pens.
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Item | Description |
Color | Selects the object’s background color. You may select one from the 98 available colors. |
(2) Line Color
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Item | Description |
Line Color | Changes the line color of the object. You may select one from 98 available colors. |
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In this tab, you may assign the tags to monitor in the Trend object. In the case of the SPC Trend, you may configure up to 8 pens. Each pen may display up to 2048 data points.
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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 a descriptive title for 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 to 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 to 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) Grid
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Item | Description |
Display Grid | Shows or hides the grid. |
X-Axis Grid No. | Assign the number of grids grid lines on the X-axis. You may assign from 1 to 99 grids. |
Y-Axis Grid No. | Assign the number of grids grid lines on the 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. |
(5) Y-Axis Legend
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Item | Description |
Display Min / Max Value | Shows or hides the min/max value of the pen on the Y-Axis. |
Size (Pixels) | Configures the size of the text displayed on the Y-Axis. You may assign the value from 0 to 1024. |
(6) X-Axis Legend
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Item | Description |
Display Min/Max Value | Shows or hides the min/max value on the X-Axis. |
(7) SPC
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Options
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Item | Description |
Using Moving Point | The moving point represents the real-time point which is displayed on the graph according to the data values of the X-Axis and Y-Axis tagtags. You may check the difference between the graph and the measured data. |
Color | You may set a moving point color. You may choose one from the 98 available colors. |
Size (Pixels) | Configures the size of the moving point. You may assign the a value from 0 to 1024. |
Using Moving Point Trace | You may trace the moving point with this option. When the tracing amount reaches the value that you have assigned to the ‘Trace Size’, the trace graph will not be updated. To update the new traces, use control tags to stop and restart the trace operation. |
Using Fixed Trace Value | When you check this option, the path of the moving point will be displayed with as much many points as the assigned value. You can assign the a value from 1 to 800.   If you deselect the this option, you have to must use a tag or an address to assign the value. You may assign the a detailed address or browse the for a tag by pressing the   |
Update Trace At X/Y Axis Data Changed. | When you select this option, the moving point’s path will increase every time the corresponding axis data changes. |
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. |
Draw Data Connection | Select this option to connect the data points with a line. |
(8) SPC
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Tags
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Item | Description |
Control | Assign a tag to control the graph update of the SPC Trend. The object will be updated according to the value assigned to the ‘Control’ tag. 1: Overwrites a new graph on the existing graph. 2: Clears the current graph. 3: Clears and redraws the graph. 4: Starts ‘Moving Point Trace’ (only when the option is selected). 5: Pauses ‘Moving Point Trace’ (only when the option is selected). 6: Stops ‘Moving Point Trace’ (only when the option is selected). |
Data Count | Assigns the number of each pen’s data to be drawn on the graph. The maximum value of the assigned tag is 2048. This option is referred used only when the control tag’s value is 1 or 3. If you are using a PLC address, set the word device as much as the data count. |
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). |
X-Axis Start Address | Assign a tag or an address to set the X-Axis coordinate. The number of allocated coordinates refers to ‘Data Count’. If you are using a PLC address, set the word device to as much as the data countstarting coordinate. |
X-Axis Minimum | Assign a tag or an address to define the minimum value of the X-Axis. If the minimum value is greater than the maximum value, the graph will not be updated. This option is referred used only when the control tag’s value is 1 or 3. |
X-Axis Maximum | Assign a tag or an address to define the maximum value of the X-Axis. If the maximum value is smaller than the minimum value, the graph will not be updated. This option is referred used only when the control tag’s value is 1 or 3. |
Y-Axis Minimum | Assign a tag or an address to define the minimum value of the Y-Axis. If the minimum value is greater than the maximum value, the graph will not be updated. This option is referred used only when the control tag’s value is 1 or 3. |
Y-Axis Maximum | Assign a tag or an address to define the maximum value of the Y-Axis. If the maximum value is smaller than the minimum value, the graph will not be updated. This option is referred used only when the control tag’s value is 1 or 3. |
X-Coordinate of Moving Point | Assign a tag which that corresponds to the moving point’s X-coordinate. The moving point’s X-Axis value is calculated according to the current graph’s X-Axis Min/Max value and the corresponding tag value. |
Y-Coordinate of Moving Point | Assign a tag which that corresponds to the moving point’s Y-coordinate. The moving point’s Y-Axis value is calculated according to the current graph’s Y-Axis Min/Max value and the corresponding tag value. |
| - 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 a delay to the other operations (opening a page, writing a tag value, etc.). It is You are recommended to operate update graphs before operating the project after the graph update. |