Timeseries Chart: Perspective Component vs Reporting Module

[Kemmone_Botshoma]

Hi everyone,

I'm new to Ignition and currently working on a project involving a hydrotester. I have a dataset tag that stores time-series data: the X-axis represents the timestamp when the start button is pressed, and the Y-axis records the testing pressure.

I’m using two Timeseries Charts:

• One in my Perspective Template Overview

• One in the Reporting Module

Both are bound to the same dataset tag. The chart in the Perspective Overview displays a smooth curve, which is ideal. However, the chart in the Reporting Module shows a step/ramp function, which doesn’t reflect the actual pressure behavior accurately.

Here’s a summary of my setup:

• The dataset tag is updated via a Gateway Timer Script.

• The script appends new data points (timestamp and pressure) to the dataset.

• I keep only the last 100 points to manage performance.

Here’s the relevant part of my Gateway Timer Script:

“def handleTimerEvent():

    # Tag paths

    start_tag = "[TPDVHYDRO]DV-HydroTester/Start"

    stop_tag = "[TPDVHYDRO]DV-HydroTester/Stop"

    reset_tag = "[TPDVHYDRO]DV-HydroTester/Reset"

    dataset_tag = "[TPDVHYDRO]DV-HydroTester/Dataset"

    y_axis_tag = "[TPDVHYDRO]DV-HydroTester/YAxis"

    reference_tag = "[TPDVHYDRO]DV-HydroTester/Value"

    # Read tag values

    start = system.tag.readBlocking([start_tag])[0].value

    stop = system.tag.readBlocking([stop_tag])[0].value

    reset = system.tag.readBlocking([reset_tag])[0].value

    # Handle Reset

    if reset:

        empty_dataset = system.dataset.toDataSet(["Time", "Value"], [])

        system.tag.writeBlocking([dataset_tag], [empty_dataset])

        system.tag.writeBlocking([reference_tag], [0])

        system.tag.writeBlocking([reset_tag], [False])

    # Stop disables Start

    if stop:

        system.tag.writeBlocking([start_tag], [False])

        system.tag.writeBlocking([stop_tag], [False])

    # Main Recording Logic

    if start:

        x_axis = system.date.now()

        y_axis = system.tag.readBlocking([y_axis_tag])[0].value

        system.tag.writeBlocking([reference_tag], [y_axis])

        raw_dataset = system.tag.readBlocking([dataset_tag])[0].value

        py_data = system.dataset.toPyDataSet(raw_dataset)

        data = [[row["Time"], row["Value"]] for row in py_data]

        data.append([x_axis, y_axis])

        if len(data) > 100:

            data = data[-100:]

        headers = ["Time", "Value"]

        new_dataset = system.dataset.toDataSet(headers, data)

        system.tag.writeBlocking([dataset_tag], [new_dataset])

Timeseries Chart: Overview

Timeseries Chart: Report

My question is: Is there a way to make the Timeseries Chart in the Reporting Module display a smooth curve, similar to the Perspective component with interpolation? Or is there a workaround to achieve a similar visual effect?

Any guidance would be greatly appreciated!

Thanks in advance,
Kemmone

[Ryan_Deardorff]

Enable scripting on the chart:

Then:

def configureChart(data, chart):
	from org.jfree.chart.renderer.xy import XYSplineRenderer

	plot = chart.getPlot()
	renderer = XYSplineRenderer(8)
	plot.setRenderer(0, renderer)

That will add shapes to each plot point, but you can remove those:

for i in range(plot.getSeriesCount()):
	renderer.setSeriesShapesVisible(i, False)

[Kemmone_Botshoma]

Using this script

def configureChart(data, chart): from org.jfree.chart.renderer.xy import XYSplineRenderer plot = chart.getPlot() renderer = XYSplineRenderer(8) plot.setRenderer(0, renderer)

This is what I get. Thank you very much. This is much better.