S7NETPLUS与西门子PLC通讯

using System;

using System.Windows.Forms;

using S7.Net;

namespace WindowsFormsApplication5

{

public
partial
class
Form1 : Form

{

public Form1()

{

InitializeComponent();

}

Plc plc = null;

private
void Form1_Load(object sender, EventArgs e)

{

plc = new
Plc(CpuType.S71200,“192.168.1.12”,0,1);

try

{

plc.Open();

}

catch(Exception ex)

{

MessageBox.Show(“错误信息：“+ex.Message);

}

}

private
void Form1_FormClosed(object sender, FormClosedEventArgs e)

{

plc.Close();

}

private
void btnRead_Click(object sender, EventArgs e)

{

Object obj = plc.Read(“DB1.DBW0”);

if(obj==null)

{

MessageBox.Show(“数据读取错误！“);

}

else

{

MessageBox.Show(Convert.ToInt16(obj).ToString());

}

}

private
async
void btnReadAsync_Click(object sender, EventArgs e)

{

Object obj = await plc.ReadAsync( DataType.DataBlock,1,0,VarType.Int,1 );

if (obj == null)

{

MessageBox.Show(“数据读取错误！“);

}

else

{

MessageBox.Show(obj.ToString());

}

}

private
void btnWrite_Click(object sender, EventArgs e)

{

plc.Write(“DB1.DBW0”,Convert.ToInt16(textBox1.Text));

}

}

}