private void button1_Click(object sender, EventArgs e)
{
if (MainFormsPlc != null)
{
var value = MainFormsPlc.Read("DB9.DBD2");
}
}
public Form1()
{
InitializeComponent();
// new plc instance
MyPlc = new S7.Net.Plc(S7.Net.CpuType.S71500, "192.168.0.1", 0, 0);
// connect to PLC
MyPlc.Open();
// read a value
var plcValue = MyPlc.Read("DB8.DBD2");
}
/// <summary>
/// Lettura di una singola variabile del set Data
/// </summary>
/// <param name="index">index della variabile da leggere</param>
public void ReadSingleVariable(int index)
{
try
{
lock (Blocker)
{
switch (Data[index].VariableType)
{
case S7.Net.VarType.Bit:
break;
case S7.Net.VarType.Byte:
break;
case S7.Net.VarType.Word:
break;
case S7.Net.VarType.DWord:
if (Data[index].DotNetDataType == typeof(Int32))
{
Data[index].RawContent = S7.Net.Conversion.ConvertToInt((uint)Plc.Read(Data[index].DataType, Data[index].DBNumber, Data[index].DBOffset, Data[index].VariableType, 1));
}
if (Data[index].DotNetDataType == typeof(UInt32))
{
Data[index].RawContent = S7.Net.Conversion.ConvertToInt((uint)Plc.Read(Data[index].DataType, Data[index].DBNumber, Data[index].DBOffset, Data[index].VariableType, 1));
}
break;
case S7.Net.VarType.Int:
if (Data[index].DotNetDataType == typeof(Int16))
{
Data[index].RawContent = Convert.ToInt16(Plc.Read(Data[index].DataType, Data[index].DBNumber, Data[index].DBOffset, Data[index].VariableType, 1));
}
if (Data[index].DotNetDataType == typeof(UInt16))
{
Data[index].RawContent = S7.Net.Conversion.ConvertToUshort((short)Plc.Read(Data[index].DataType, Data[index].DBNumber, Data[index].DBOffset, Data[index].VariableType, 1));
}
break;
case S7.Net.VarType.DInt:
break;
case S7.Net.VarType.Real:
if (Data[index].DotNetDataType == typeof(Single))
{
Data[index].RawContent = (double)Plc.Read(Data[index].DataType, Data[index].DBNumber, Data[index].DBOffset, Data[index].VariableType, 1);
}
if (Data[index].DotNetDataType == typeof(double))
{
throw new Exception("La lettura del LREAL non è ancora stata implementata correttamente");
//Data[index].RawContent = Convert.ToDecimal(Plc.Read(Data[index].DataType, Data[index].DBNumber, Data[index].DBOffset, Data[index].VariableType, 1));
}
break;
case S7.Net.VarType.String:
Data[index].RawContent = Plc.Read(Data[index].DataType, Data[index].DBNumber, Data[index].DBOffset, Data[index].VariableType, Data[index].MaxStringLenght + 2);
BuildWorkString_FromRaw(Data[index]);
break;
case S7.Net.VarType.Timer:
break;
case S7.Net.VarType.Counter:
break;
default:
break;
}
}
}
catch (Exception ex)
{
Console.WriteLine("SiemensPLC.ReadSingleVariable = " + ex.Message);
}
}