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   源码介绍

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VB、C#等PC高级语言与西门子PLC（S7-200Smart、S7-1200、S7-1500、S7-300、S7-400等）以太网、串口通讯

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 TcpClient
{

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


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

#region Default Instance

private static Form1 defaultInstance;


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

int Handle1;
bool EntLink;
long ScanCount;

WinTcpS7_1K.PlcClient PLC = new WinTcpS7_1K.PlcClient();

[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)
{
short i = 0;
this.CenterToScreen();
cmbReadMry.Items.Clear();
cmbReadMry.Items.Add("I");
cmbReadMry.Items.Add("Q");
cmbReadMry.Items.Add("M");
cmbReadMry.Items.Add("DB");
cmbReadMry.Items.Add("AI");
cmbReadMry.Items.Add("AQ");
cmbWriteMry.Items.Clear();
cmbWriteMry.Items.Add("I");
cmbWriteMry.Items.Add("Q");
cmbWriteMry.Items.Add("M");
cmbWriteMry.Items.Add("DB");
cmbWriteMry.Items.Add("AI");
cmbWriteMry.Items.Add("AQ");
cmbBitMry.Items.Clear();
cmbBitMry.Items.Add("I");
cmbBitMry.Items.Add("Q");
cmbBitMry.Items.Add("M");
cmbBitMry.Items.Add("DB");
cmbReadType.Items.Clear();
cmbReadType.Items.Add("W_INT16");
cmbReadType.Items.Add("W_UINT16");
cmbReadType.Items.Add("D_DINT32");
cmbReadType.Items.Add("D_HEX32");
cmbReadType.Items.Add("D_REAL32");
cmbReadType.Items.Add("W_BIN16");
cmbReadType.Items.Add("B_CHAR8");
cmbReadType.Items.Add("B_BYTE8");
cmbWriteType.Items.Clear();
cmbWriteType.Items.Add("W_INT16");
cmbWriteType.Items.Add("W_UINT16");
cmbWriteType.Items.Add("D_DINT32");
cmbWriteType.Items.Add("D_HEX32");
cmbWriteType.Items.Add("D_REAL32");
cmbWriteType.Items.Add("W_BIN16");
cmbWriteType.Items.Add("B_CHAR8");
cmbWriteType.Items.Add("B_BYTE8");

for (i = 0; i <= 7; i )
{
cmbBit.Items.Add("Bit" System.Convert.ToString(i));
}
cmbReadMry.SelectedIndex = 2;
cmbWriteMry.SelectedIndex = 2;
cmbBitMry.SelectedIndex = 2;
cmbBit.SelectedIndex = 0;
cmbReadType.SelectedIndex = 0;
cmbWriteType.SelectedIndex = 0;
lstRead.Items.Clear();
}


public void butLink_Click(System.Object sender, System.EventArgs e)
{
short re = 0;
string restr = "";
re = PLC.EntLink(txtLocalIP.Text.Trim(), System.Convert.ToUInt16(txtLocalPort.Text), txtRemoteIP.Text.Trim(), System.Convert.ToUInt16(txtRemotePort.Text), System.Convert.ToUInt16(0), System.Convert.ToUInt16(1), "DEMO", ref Handle1);
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 = 0;
EntLink = false;
re = PLC.DeLink(Handle1);
txtReClose.Text = re.ToString();
}



public void butRead_Click(System.Object sender, System.EventArgs e)
{
short re = 0;
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 = cmbReadMry.SelectedIndex 1;
            WinTcpS7_1K.PlcClient.PlcMemory mry = (WinTcpS7_1K.PlcClient.PlcMemory)var1;
var1 = cmbReadType.SelectedIndex 1;
            WinTcpS7_1K.PlcClient.DataType typ = (WinTcpS7_1K.PlcClient.DataType)var1;

re = PLC.CmdRead(Handle1, mry, typ, System.Convert.ToUInt16(txtReadBlock.Text), System.Convert.ToUInt16(txtReadAdd.Text), System.Convert.ToUInt16(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 ReadData()
        {
            short re = 0;
            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 = cmbReadMry.SelectedIndex 1;
            WinTcpS7_1K.PlcClient.PlcMemory mry = (WinTcpS7_1K.PlcClient.PlcMemory)var1;
            var1 = cmbReadType.SelectedIndex 1;
            WinTcpS7_1K.PlcClient.DataType typ = (WinTcpS7_1K.PlcClient.DataType)var1;

            re = PLC.CmdRead(Handle1, mry, typ, System.Convert.ToUInt16(txtReadBlock.Text), System.Convert.ToUInt16(txtReadAdd.Text), System.Convert.ToUInt16(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 re = 0;
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; i )
{
if (i >= temp.Length)
{
WD[i] = 0;
}
else
{
WD[i] = temp[i].Trim();
}
}
int var1 = cmbWriteMry.SelectedIndex 1;
WinTcpS7_1K.PlcClient.PlcMemory mry = (WinTcpS7_1K.PlcClient.PlcMemory)var1;
var1 = cmbWriteType.SelectedIndex 1;
WinTcpS7_1K.PlcClient.DataType typ = (WinTcpS7_1K.PlcClient.DataType)var1;

re = PLC.CmdWrite(Handle1, mry, typ, System.Convert.ToUInt16(txtWriteBlock.Text), System.Convert.ToUInt16(txtWriteAdd.Text), System.Convert.ToUInt16(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 ((short.Parse(txtReRead.Text) < 0) || (short.Parse(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 var1 = cmbBitMry.SelectedIndex 1;
WinTcpS7_1K.PlcClient.PlcMemory mry = (WinTcpS7_1K.PlcClient.PlcMemory)var1;

re = PLC.Bit_Test(Handle1, mry, System.Convert.ToUInt16(txtBitBlock.Text), System.Convert.ToUInt16(txtBitAdd.Text), System.Convert.ToUInt16(cmbBit.SelectedIndex), 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 var1 = cmbBitMry.SelectedIndex 1;
WinTcpS7_1K.PlcClient.PlcMemory mry = (WinTcpS7_1K.PlcClient.PlcMemory)var1;

re = PLC.Bit_Set(Handle1, mry, System.Convert.ToUInt16(txtBitBlock.Text), System.Convert.ToUInt16(txtBitAdd.Text), System.Convert.ToUInt16(cmbBit.SelectedIndex));

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 var1 = cmbBitMry.SelectedIndex 1;
WinTcpS7_1K.PlcClient.PlcMemory mry = (WinTcpS7_1K.PlcClient.PlcMemory)var1;

re = PLC.Bit_Reset(Handle1, mry, System.Convert.ToUInt16(txtBitBlock.Text), System.Convert.ToUInt16(txtBitAdd.Text), System.Convert.ToUInt16(cmbBit.SelectedIndex));

txtReBit.Text = re.ToString();
}




public void butReadString_Click(System.Object sender, System.EventArgs e)
{
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");
return;
}
string re = "";
re = PLC.CmdReadString(Handle1, WinTcpS7_1K.PlcClient.PlcMemory.DR, System.Convert.ToUInt16(txtStrDB.Text), System.Convert.ToUInt16(txtBuffAdd.Text), System.Convert.ToUInt16(txtBuffSize.Text));
txtReadString.Text = re;
}
public void butWriteString_Click(System.Object sender, System.EventArgs e)
{
if (!EntLink)
{
MessageBox.Show("还未与PLC建立联接！");
return;
}
short re = 0;
re = PLC.CmdWriteString(Handle1, WinTcpS7_1K.PlcClient.PlcMemory.DR, System.Convert.ToUInt16(txtStrDB.Text), System.Convert.ToUInt16(txtBuffAdd.Text), System.Convert.ToUInt16(txtBuffSize.Text), txtWriteString.Text);
txtReWriteString.Text = re.ToString();
}
}

}