Data Correlation

Data correlation are used

• To create a generic information model (GIM)
• To reduce data traffic to platforms

Data Processors

Different types exist

• Processors with simple predicate logic
• Processors with C# Scripts
• Processors dedicated for event processing
• Processors dedicated for streaming data processing

Each processor defines input and output ports which are connected to data nodes or other processor ports.

Port Matching

The port matching rule is responsible to match the data nodes to processor ports.

NOTE

Make sure your device information model includes a port matching rule.

Following rules are applied to match of the data nodes with ports of the processors

• The property PortMatchId must be equal
• The DataType must be equal
• The data node class Event must match with port type EventPassing or Stream must match with Streaming

Complex Data Processing

Complex data processing is realized with C# Scripts.

The script file is referenced by the processing node:

The script file itself is placed in the folder of the Heidenhain plugin:

Following example shows the program header processing of the Heidenhain controllers:

using HumanOS.Kernel.Processing;
using System.Linq;
using System;

namespace HumanOS.UHAL.HeidenhainControl.Scripts
{
  /// <summary>
  /// Processes the program header of the main program
  /// </summary>
  public class TMainProgramHeaderProcessorScript : TAbstractProcessingScriptObject
  {
    /// <see cref="TAbstractProcessingScriptObject"/>
    public override void process(IProcessingNode Processor)
    {
      // get input values
      string strMainHeader = Processor.getProperty<string>("In_MainProgramHeader");

      string strProductName = "";
      string strProcessStep = "";

      // calculate program name
      if (strMainHeader != null)
      {
        string[] astrLines = strMainHeader.Split('\n');
        strProductName = astrLines.FirstOrDefault(n => n.Contains(";PRODUCT:"));
        strProcessStep = astrLines.FirstOrDefault(n => n.Contains(";STEP:"));

        if (strProductName.isEmpty()) { strProductName = ""; }
        else { strProductName = strProductName.Split(";PRODUCT:").Last(); }
        if (strProcessStep.isEmpty()) { strProcessStep = ""; }
        else { strProcessStep = strProcessStep.Split(";STEP:").Last(); }
      }

      Processor.setProperty<string>("Out_ProductName", strProductName.trimWhiteSpaces());
      Processor.setProperty<string>("Out_ProductionStep", strProcessStep.trimWhiteSpaces());
    }
  }
}

NOTE

Use the trim function like strProductName.trimWhiteSpaces() to eliminate spaces and \r.

IMPORTANT

If you use different scripts make sure the class name is unique. Use the internal script editor of HumanOS IoT Designer and check for syntax errors before you deploy your IoT project.