ChartBySampling (version 3.98r or later)

[Archie]

This new control will plot a line (or lines) based on samples a register/tag/variable.

- Add a driver instance to the form and set the PollRateOverride to the desired sample rate
- Add a ChartBySampling
- Set the MaximumActivePoints to the number of points that will stay on the chart
- Add PLC addresses to PLCAddressItems. Each item added will be another series/line
- By default the first series is a bar chart. This can be changed by going to Series property and changing ChartType

[mcameron0980]

Hi Archie,
Great app - thx for all your hard work!
Is there a way to make the X axis show the date/time that the sample was taken?
Thank you,
mcameron0980

[Godra]

You can go to Series (Collection), select Series1 or some other and set its XValueType to DateTime.

[mcameron0980]

Thank you for looking into this Godra. Pls see attached for my output - not sure why I get the date offset and no time...

[Archie]

In addition to Godra's suggestionm you will need to edit AdvancedHMIControls\Controls\ChartBySampling.vb

Go to line 198 and change to this:

        MyBase.Series(index).Points.AddXY(Now, CDbl(m_PLCAddressItems(index).GetScaledValue(e.PLCComEventArgs.Values(0))))

[Godra]

If you prefer a specific format then you could modify Archie's code to:

Code: [Select]

        MyBase.Series(index).Points.AddXY(Now.ToString("dd-MMM-yy HH:mm:ss"), CDbl(m_PLCAddressItems(index).GetScaledValue(e.PLCComEventArgs.Values(0))))

or some other format as specified here:

https://msdn.microsoft.com/en-us/library/8kb3ddd4(v=vs.71).aspx

[DEG]

Hi,
Is there a way to configure the Y axis show the decimal

[Archie]

ChartBySampling1 -> ChartAreas -> Axes -> Y (Value) axis -> Label Style -> Format

Set to something like 0.00

[DEG]

My problem is this?

[Archie]

ChartBySampling1 -> PLCAddressItems -> select your item -> ScaleFactor -> 0.01

[DEG]

Here's my problem.

[Godra]

I just tried this, v3.98t with 40004 Modbus address and RSSim simulator, and it worked for me.

[Archie]

I can't seem to reproduce this in 3.98r ot 3.98t. Are you possibly on another localized language where it needs to be 0,01 instead of 0.01 (comma versus decimal)?

[DEG]

Thank you, Thank you, Thank you....

[DEG]