SumCreateHandles Class

Inheritance Hierarchy

SystemObject
  SumCommandBase
    TwinCAT.Ads.SumCommandSumCreateHandles

Namespace: TwinCAT.Ads.SumCommand
Assembly: TwinCAT.Ads (in TwinCAT.Ads.dll) Version: 7.0.0+e56d35ccc4675faac24789a4aab60071fc61d470

C#

public class SumCreateHandles : SumCommandBase

The SumCreateHandles type exposes the following members.

Constructors

Methods

Remarks

The SumCreateHandles SumCommand creates the variable Handles not via the IHandleCache internally used by the AdsClient. Therefore the overloads of the IConnection should be used.

Usage of Sum commands with handles (CreateHandles, Read, Write, ReleaseHandles)

/// <summary>
/// Defines the entry point of the application.
/// </summary>
/// <param name="args">The arguments.</param>
static async void Main(string[] args)
{
    Console.WriteLine("");
    Console.WriteLine("Press [Enter] for start:");
    Console.ReadLine();

    // Parse the command-line arguments
    AmsAddress address = ArgParser.Parse(args);

    CancellationTokenSource cancelSource = new CancellationTokenSource();
    CancellationToken cancel = cancelSource.Token;

    using (AdsClient client = new AdsClient())
    {
    // Connect the AdsClient to the device target.
    client.Connect(address);

    string[] instancePathList = {
        "GVL.bVar",
        "GVL.iCount",
        "TwinCAT_SystemInfoVarList._AppInfo.ProjectName"
    };
    SumCreateHandles createHandlesCommand = new SumCreateHandles(client,instancePathList);

    var resultCreateHandles = await createHandlesCommand.CreateHandlesAsync(cancel);

    if (resultCreateHandles.Succeeded)
    {
        uint[] handles = resultCreateHandles.Handles;
        Type[] valueTypes = new Type[]
        {
        typeof(bool),
        typeof(short),
        typeof(string)
        };
        SumHandleReadAnyType readCommand = new SumHandleReadAnyType(client, handles, valueTypes, SumFallbackMode.All);
        var resultRead = await readCommand.ReadAsync(cancel);

        if (resultRead.Succeeded)
        {
        object[] readValues = resultRead.Values;

        for (int i = 0; i < instancePathList.Length; i++)
        {
            Console.WriteLine("Symbol: {0} (Value: {1}, Type: {2})", instancePathList[i], readValues[i].ToString(), valueTypes[i].Name);
        }

        // Sum Command Write
        SumHandleWriteAnyType writeCommand = new SumHandleWriteAnyType(client, handles, valueTypes);
        object[] writeValues = new object[] { true, (short)42, "MyNewProjectName" };

        await writeCommand.WriteAsync(writeValues,cancel);
        }

        SumReleaseHandles releaseCommand = new SumReleaseHandles(client, handles);
        await releaseCommand.ReleaseHandlesAsync(cancel);
    }
    }

    Console.WriteLine("");
    Console.WriteLine("Press [Enter] for leave:");
    Console.ReadLine();
}

Reference

TwinCAT.Ads.SumCommand Namespace ISumCommand SumReleaseHandles SumCreateHandlesBase SumHandleReadAnyType SumHandleWriteAnyType

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