C#使用第三方DLL通信三菱PLC

【实例简介】

使用第三方DLL，无需知道协议连接三菱PLC设备进行通信。

【实例截图】

【核心代码】

public partial class Form1
{
public Form1()
{
InitializeComponent();

//Added to support default instance behavour in C#
if (defaultInstance == null)
defaultInstance = this;
}

#region Default Instance

private static Form1 defaultInstance;

/// <summary>
/// Added by the VB.Net to C# Converter to support default instance behavour in C#
/// </summary>
public static Form1 Default
{
get
{
if (defaultInstance == null)
{
defaultInstance = new Form1();
defaultInstance.FormClosed = new FormClosedEventHandler(defaultInstance_FormClosed);
}

return defaultInstance;
}
set
{
defaultInstance = value;
}
}

static void defaultInstance_FormClosed(object sender, FormClosedEventArgs e)
{
defaultInstance = null;
}

#endregion


EntFxPlc_ADP.PlcClient PLC = new EntFxPlc_ADP.PlcClient();
bool EntLink;
long ScanCount;
int PlcHand;
[DllImport("winmm.dll", ExactSpelling=true, CharSet=CharSet.Ansi, SetLastError=true)]
public static extern UInt32 timeGetTime();


public void Form1_Load(System.Object sender, System.EventArgs e)
{
this.CenterToScreen();
cmbReadMry.Items.Clear();
cmbReadMry.Items.Add("X");
cmbReadMry.Items.Add("Y");
cmbReadMry.Items.Add("M");
cmbReadMry.Items.Add("S");
cmbReadMry.Items.Add("D");
cmbWriteMry.Items.Clear();
cmbWriteMry.Items.Add("X");
cmbWriteMry.Items.Add("Y");
cmbWriteMry.Items.Add("M");
cmbWriteMry.Items.Add("S");
cmbWriteMry.Items.Add("D");
cmbBitMry.Items.Clear();
cmbBitMry.Items.Add("X");
cmbBitMry.Items.Add("Y");
cmbBitMry.Items.Add("M");
cmbBitMry.Items.Add("S");
cmbReadType.Items.Clear();
cmbReadType.Items.Add("INT16");
cmbReadType.Items.Add("UINT16");
cmbReadType.Items.Add("DINT32");
cmbReadType.Items.Add("HEX32");
cmbReadType.Items.Add("REAL32");
cmbReadType.Items.Add("BIN16");
cmbWriteType.Items.Clear();
cmbWriteType.Items.Add("INT16");
cmbWriteType.Items.Add("UINT16");
cmbWriteType.Items.Add("DINT32");
cmbWriteType.Items.Add("HEX32");
cmbWriteType.Items.Add("REAL32");
cmbWriteType.Items.Add("BIN16");

cmbReadMry.SelectedIndex = 4;
cmbWriteMry.SelectedIndex = 4;
cmbBitMry.SelectedIndex = 2;
cmbReadType.SelectedIndex = 0;
cmbWriteType.SelectedIndex = 0;
lstRead.Items.Clear();
txtWrite.Text = "";

cmbCmdType.SelectedIndex = 0;
}


public void butLink_Click(System.Object sender, System.EventArgs e)
{
short re = 0;
string restr = "";
re = PLC.EntLink(txtLocalIP.Text.Trim(), System.Convert.ToUInt16(Conversion.Val(txtLocalPort.Text)), txtRemoteIP.Text.Trim(), System.Convert.ToUInt16(Conversion.Val(txtRemotePort.Text)), "DEMO", ref PlcHand, System.Convert.ToUInt16(1000), System.Convert.ToBoolean(cmbCmdType.SelectedIndex));
txtReLink.Text = re.ToString();
if (re == 0)
{
EntLink = true;
MessageBox.Show("PLC联接成功！");
}
else
{
EntLink = false;
MessageBox.Show("PLC联接失败: " restr);
}
}

public void butClose_Click(System.Object sender, System.EventArgs e)
{
short re = PLC.DeLink(PlcHand);
txtReClose.Text = re.ToString();
EntLink = false;
}

public void butRead_Click(System.Object sender, System.EventArgs e)
{
short i = 0;
short re = 0;
object[] RD = null;
RD = new object[int.Parse(txtReadCnt.Text)];
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");
return;
}
            int val1 =cmbReadMry.SelectedIndex 1;
            EntFxPlc_ADP .PlcClient .PlcMemory mry = (EntFxPlc_ADP .PlcClient .PlcMemory )val1;
            val1 = cmbReadType.SelectedIndex 1;
EntFxPlc_ADP.PlcClient.DataType typ = (EntFxPlc_ADP .PlcClient .DataType )val1;

re = PLC.CmdRead(PlcHand, mry, typ, System.Convert.ToUInt16(ushort.Parse(txtReadAdd.Text)), System.Convert.ToUInt16(ushort.Parse(txtReadCnt.Text)), ref RD);

txtReRead.Text = re.ToString();
lstRead.Items.Clear();
for (i = 0; i < RD.Length; i )
{
if (!ReferenceEquals(RD[i], null))
{
lstRead.Items.Add(RD[i]);
}
else
{
lstRead.Items.Add("0");
}
}
}


public void butWrite_Click(System.Object sender, System.EventArgs e)
{
short i = 0;
short re = 0;
string[] temp = null;
object[] WD = null;
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");
return;
}
WD = new object[int.Parse(txtWriteCnt.Text)];
temp = txtWrite.Text.Split('\n');
for (i = 0; i < WD.Length; i )
{
if (i >= temp.Length)
{
WD[i] = 0;
}
else
{
WD[i] = temp[i].Trim();
}
}
            int val1 = cmbWriteMry.SelectedIndex 1;
            EntFxPlc_ADP.PlcClient.PlcMemory mry = (EntFxPlc_ADP.PlcClient.PlcMemory)val1;
            val1 = cmbWriteType.SelectedIndex 1;
            EntFxPlc_ADP.PlcClient.DataType typ = (EntFxPlc_ADP.PlcClient.DataType)val1;

re = PLC.CmdWrite(PlcHand, mry, typ, System.Convert.ToUInt16(ushort.Parse(txtWriteAdd.Text)), System.Convert.ToUInt16(ushort.Parse(txtWriteCnt.Text)), ref WD);

txtReWrite.Text = re.ToString();
}

public void butScan_Click(System.Object sender, System.EventArgs e)
{
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");
return;
}
if (butScan.Text == "Cycle R/W")
{
ScanCount = 0;
Timer1.Enabled = true;
butScan.Text = "Stop R/W";
}
else
{
Timer1.Enabled = false;
butScan.Text = "Cycle R/W";
}
}

public void Timer1_Tick(System.Object sender, System.EventArgs e)
{
Timer1.Enabled = false;
int tim = System.Convert.ToInt32(timeGetTime());
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");
return;
}
//
butRead_Click(null, null);
butWrite_Click(null, null);
//
if ((Conversion.Val(txtReRead.Text) < 0) || (Conversion.Val(txtReWrite.Text) < 0))
{
butScan.Text = "Cycle R/W";
return;
}
else
{
ScanCount ;
txtScanCnt.Text = ScanCount.ToString();
txtScanPrd.Text = (System.Convert.ToInt32(timeGetTime()) - tim) "ms";
}
Timer1.Enabled = true;
}




public void butBitTest_Click(System.Object sender, System.EventArgs e)
{
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");
return;
}
bool rd = false;
short re = 0;
            int val1 =cmbBitMry.SelectedIndex 1;
            EntFxPlc_ADP.PlcClient.PlcMemory mry = (EntFxPlc_ADP.PlcClient.PlcMemory)val1;

re = PLC.Bit_Test(PlcHand, mry, System.Convert.ToUInt16(ushort.Parse(txtBitAdd.Text)), ref rd);

txtBitTest.Text = rd.ToString();
txtReBit.Text = re.ToString();
}

public void butBitSet_Click(System.Object sender, System.EventArgs e)
{
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");
return;
}
short re = 0;
            int val1 = cmbBitMry.SelectedIndex 1;
            EntFxPlc_ADP.PlcClient.PlcMemory mry = (EntFxPlc_ADP.PlcClient.PlcMemory)val1;

re = PLC.Bit_Set(PlcHand, mry, System.Convert.ToUInt16(ushort.Parse(txtBitAdd.Text)));

txtReBit.Text = re.ToString();
}

public void butBitRst_Click(System.Object sender, System.EventArgs e)
{
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");
return;
}
short re = 0;
            int val1 = cmbBitMry.SelectedIndex 1;
            EntFxPlc_ADP.PlcClient.PlcMemory mry = (EntFxPlc_ADP.PlcClient.PlcMemory)val1;

re = PLC.Bit_Reset(PlcHand, mry, System.Convert.ToUInt16(ushort.Parse(txtBitAdd.Text)));

txtReBit.Text = re.ToString();
}



}