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   源码介绍

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C#实现与三菱PLC通讯

using System.Collections.Generic;
using System;
using System.Linq;
using System.Drawing;
using System.Diagnostics;
using System.Data;
using System.Xml.Linq;
using Microsoft.VisualBasic;
using System.Collections;
using System.Windows.Forms;


using System.Runtime.InteropServices;

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

if (defaultInstance == null)
defaultInstance = this;
}

#region Default Instance

private static Form1 defaultInstance;

/// <summary>
/// </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

ComFxPlc.PlcCom PLC = new ComFxPlc.PlcCom();


bool EntLink;
long ScanCount;
short ScanRet;

[DllImport("winmm.dll", ExactSpelling=true, CharSet=CharSet.Ansi, SetLastError=true)]
public static extern long timeGetTime();


public void Form1_Load(System.Object sender, System.EventArgs e)
{
this.CenterToScreen();
cmbReadMry.Items.Add("X");
cmbReadMry.Items.Add("Y");
cmbReadMry.Items.Add("M");
cmbReadMry.Items.Add("D");
cmbReadMry.Items.Add("S");
cmbWriteMry.Items.Add("X");
cmbWriteMry.Items.Add("Y");
cmbWriteMry.Items.Add("M");
cmbWriteMry.Items.Add("D");
cmbWriteMry.Items.Add("S");
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 = 3;
cmbWriteMry.SelectedIndex = 3;
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.ComLink(ushort.Parse(txtPort.Text.Trim()), (int) (Conversion.Val(txtRate.Text)), (short) 7, (short) 1, ComFxPlc.PlcCom.ParityType.Even, (short) (Conversion.Val(txtDelay.Text)), "DEMO",Convert .ToBoolean (cmbCmdType .SelectedIndex ));
txtReLink.Text = re.ToString();
if (re == 0)
{
EntLink = true;
MessageBox.Show("PLC联接成功: " restr);
}
else
{
EntLink = false;
MessageBox.Show("PLC联接失败: " restr);
}
}

public void butClose_Click(System.Object sender, System.EventArgs e)
{
short re = 0;
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");
return;
}
re = PLC.DeLink();
txtReClose.Text = re.ToString();
}

public void butRead_Click(System.Object sender, System.EventArgs e)
{
short i = 0;
object[] RD = null;
RD = new object[System.Convert.ToUInt16 (txtReadCnt.Text)];
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");

return;
}
int var1 = cmbReadType.SelectedIndex 1;
            ComFxPlc.PlcCom.DataType typ = (ComFxPlc.PlcCom.DataType)var1;
switch (cmbReadMry.SelectedIndex)
{
case 0:
ScanRet = PLC.CmdRead(ComFxPlc.PlcCom.PlcMemory.DI, typ, (short) (Conversion.Val(txtReadAdd.Text)), (short) (Conversion.Val(txtReadCnt.Text)), ref RD);
break;
case 1:
ScanRet = PLC.CmdRead(ComFxPlc.PlcCom.PlcMemory.DQ, typ, (short) (Conversion.Val(txtReadAdd.Text)), (short) (Conversion.Val(txtReadCnt.Text)), ref RD);
break;
case 2:
ScanRet = PLC.CmdRead(ComFxPlc.PlcCom.PlcMemory.MR, typ, (short) (Conversion.Val(txtReadAdd.Text)), (short) (Conversion.Val(txtReadCnt.Text)), ref RD);
break;
case 3:
ScanRet = PLC.CmdRead(ComFxPlc.PlcCom.PlcMemory.DR, typ, (short) (Conversion.Val(txtReadAdd.Text)), (short) (Conversion.Val(txtReadCnt.Text)), ref RD);
break;
case 4:
ScanRet = PLC.CmdRead(ComFxPlc.PlcCom.PlcMemory.SR, typ, (short) (Conversion.Val(txtReadAdd.Text)), (short) (Conversion.Val(txtReadCnt.Text)), ref RD);
break;
}
txtReRead.Text = ScanRet.ToString();
lstRead.Items.Clear();
for (i = 0; i <= (RD.Length - 1); i )
{
if (!(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;
string[] temp = null;
object[] WD = null;
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");
return;
}
            WD = new object[System.Convert.ToUInt16(txtWriteCnt.Text)];
temp = txtWrite.Text.Split('\n');
for (i = 0; i <= (WD.Length - 1); i )
{
if (i > (temp.Length - 1))
{
WD[i] = 0;
}
else
{
WD[i] = temp[i].Trim();
}
}
int var1 = cmbWriteType.SelectedIndex 1;
ComFxPlc.PlcCom.DataType typ = (ComFxPlc.PlcCom.DataType) var1;
switch (cmbWriteMry.SelectedIndex)
{
case 0:
ScanRet = PLC.CmdWrite(ComFxPlc.PlcCom.PlcMemory.DI, typ, (short) (Conversion.Val(txtWriteAdd.Text)), (short) (Conversion.Val(txtWriteCnt.Text)), ref WD);
break;
case 1:
ScanRet = PLC.CmdWrite(ComFxPlc.PlcCom.PlcMemory.DQ, typ, (short) (Conversion.Val(txtWriteAdd.Text)), (short) (Conversion.Val(txtWriteCnt.Text)), ref WD);
break;
case 2:
ScanRet = PLC.CmdWrite(ComFxPlc.PlcCom.PlcMemory.MR, typ, (short) (Conversion.Val(txtWriteAdd.Text)), (short) (Conversion.Val(txtWriteCnt.Text)), ref WD);
break;
case 3:
ScanRet = PLC.CmdWrite(ComFxPlc.PlcCom.PlcMemory.DR, typ, (short) (Conversion.Val(txtWriteAdd.Text)), (short) (Conversion.Val(txtWriteCnt.Text)), ref WD);
break;
case 4:
ScanRet = PLC.CmdWrite(ComFxPlc.PlcCom.PlcMemory.SR, typ, (short) (Conversion.Val(txtWriteAdd.Text)), (short) (Conversion.Val(txtWriteCnt.Text)), ref WD);
break;
}
txtReWrite.Text = ScanRet.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 ((Convert.ToInt32(txtReRead.Text) < 0) || (Convert.ToInt32(txtReWrite.Text) < 0))
            {
                butScan.Text = "Cycle R/W";
                return;
            }
            else
            {
                ScanCount ;
                txtScanCnt.Text = ScanCount.ToString();
                txtScanPrd.Text = (System.Convert.ToInt32(timeGetTime()) - tim).ToString() "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;
switch (cmbBitMry.SelectedIndex)
{
case 0:
re = PLC.Bit_Test(ComFxPlc.PlcCom.PlcMemory.DI, (short) (Conversion.Val(txtBitAdd.Text)),  ref rd);
break;
case 1:
re = PLC.Bit_Test(ComFxPlc.PlcCom.PlcMemory.DQ, (short) (Conversion.Val(txtBitAdd.Text)),  ref rd);
break;
case 2:
re = PLC.Bit_Test(ComFxPlc.PlcCom.PlcMemory.MR, (short) (Conversion.Val(txtBitAdd.Text)),  ref rd);
break;
case 3:
re = PLC.Bit_Test(ComFxPlc.PlcCom.PlcMemory.SR, (short) (Conversion.Val(txtBitAdd.Text)), ref rd);
break;
}
txtBitTest.Text = System.Convert.ToString(rd);
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;
switch (cmbBitMry.SelectedIndex)
{
case 0:
re = PLC.Bit_Set(ComFxPlc.PlcCom.PlcMemory.DI, (short) (Conversion.Val(txtBitAdd.Text)));
break;
case 1:
re = PLC.Bit_Set(ComFxPlc.PlcCom.PlcMemory.DQ, (short) (Conversion.Val(txtBitAdd.Text)));
break;
case 2:
re = PLC.Bit_Set(ComFxPlc.PlcCom.PlcMemory.MR, (short) (Conversion.Val(txtBitAdd.Text)));
break;
case 3:
re = PLC.Bit_Set(ComFxPlc.PlcCom.PlcMemory.SR, (short) (Conversion.Val(txtBitAdd.Text)));
break;
}
            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;
switch (cmbBitMry.SelectedIndex)
{
case 0:
re = PLC.Bit_Reset(ComFxPlc.PlcCom.PlcMemory.DI, (short) (Conversion.Val(txtBitAdd.Text)));
break;
case 1:
re = PLC.Bit_Reset(ComFxPlc.PlcCom.PlcMemory.DQ, (short) (Conversion.Val(txtBitAdd.Text)));
break;
case 2:
re = PLC.Bit_Reset(ComFxPlc.PlcCom.PlcMemory.MR, (short) (Conversion.Val(txtBitAdd.Text)));
break;
case 3:
re = PLC.Bit_Reset(ComFxPlc.PlcCom.PlcMemory.SR, (short) (Conversion.Val(txtBitAdd.Text)));
break;

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


}

}