Read flag synchronously from the PLC

Requirements

Description

In this example program the value in flag double word 0 in the PLC is read and displayed on the screen:

C# program

static void Main(string[] args)
{
 //Create a new instance of class TcAdsClient
 TcAdsClient tcClient = new TcAdsClient();

 try
 {
    // Connect to local PLC - Runtime 1 - TwinCAT 2 Port=801, TwinCAT 3 Port=851
    tcClient.Connect(801);

     //Specify IndexGroup, IndexOffset and read SPSVar 
     int iFlag = (int)tcClient.ReadAny(0x4020, 0x0, typeof(Int32));

        Console.WriteLine("" + iFlag);
     Console.ReadKey();
 }
 catch (Exception ex)
 {
        Console.WriteLine(ex.Message);
        Console.ReadKey();
 }
 finally
 {
        tcClient.Dispose();
 }
}