西安软件外包采用读写PLC数据
using S7.Net;
using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;
namespace 读写PLC数据
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
public Plc plc = new Plc(CpuType.S71200, "127.0.0.1", 0, 1); //定义新的PLC对象
private void Button1_Click(object sender, EventArgs e)
{
plc.Open();//连接PLC
if (plc.IsConnected)
{
MessageBox.Show("连接成功！", "连接提示", MessageBoxButtons.OK);
}
else
{
MessageBox.Show("连接失败！", "连接提示", MessageBoxButtons.OK);
}
}
private void Btn_disconnect_Click(object sender, EventArgs e)
{
plc.Close();//断开PLC
}
#region 读PLC数据
private void Btn_read_Click(object sender, EventArgs e)
{
if (plc.IsConnected == false)
{
MessageBox.Show("未连接PLC!", "连接提示", MessageBoxButtons.OK);//检查PLC是否连接；
}
else
{
try
{
string[] arr = (txt_read_addr.Text.ToUpper()).Split('.');//将txt_read_addr文本框中的数据转为大写字母，并用“.”拆分后存放到arr数组中
string valuetype = arr[1].Substring(0, 3);//取数组中的第二个元素的前三位，用以确认读取的PLC数据类型
//PLC数据类型：DBX(位，bool）DBB(字节,byte）DBW(字,word）DBD(双字,dword）
//以下是按不同的数据类型，对PLC数据进行读取
if (valuetype == "DBX")
{
bool test1 = (bool)plc.Read(txt_read_addr.Text.ToUpper());
ShowMsg(txt_read_addr.Text + ":" + test1.ToString());
}
else if (valuetype == "DBW")
{
short test3 = ((ushort)plc.Read(txt_read_addr.Text.ToUpper())).ConvertToShort();
ShowMsg(txt_read_addr.Text + ":" + test3.ToString());
}
else if (valuetype == "DBD")
{
double test5 = ((uint)plc.Read(txt_read_addr.Text.ToUpper())).ConvertToFloat();
ShowMsg(txt_read_addr.Text + ":" + test5.ToString());
}
else
{
MessageBox.Show("请检查地址是否输入错误！", "输入提示", MessageBoxButtons.OK);
}
}
catch (Exception Ex)
{
MessageBox.Show("请检查地址是否输入错误！", "输入提示", MessageBoxButtons.OK);
}
}
}
#endregion
#region 将数据写入PLC
private void Btn_write_Click(object sender, EventArgs e)
{
if (plc.IsConnected == false)
{
MessageBox.Show("未连接PLC!", "连接提示", MessageBoxButtons.OK);
}
else
{
try
{
string[] arr = (txt_write_addr.Text.ToUpper()).Split('.');
string valuetype = arr[1].Substring(0, 3);
if (valuetype == "DBX")
{
plc.Write(txt_write_addr.Text.ToUpper(), Convert.ToBoolean(txt_value.Text));
}
else if (valuetype == "DBW")
{
var value = short.Parse(txt_value.Text);
plc.Write(txt_write_addr.Text.ToUpper(), value);
}
else if (valuetype == "DBD")
{
double value = double.Parse(txt_value.Text);
plc.Write(txt_write_addr.Text.ToUpper(), value);
}
else
{
MessageBox.Show("请检查地址是否输入错误！", "输入提示", MessageBoxButtons.OK);
}
}
catch (Exception Ex)
{
MessageBox.Show("请检查输入的“地址”或“值”是否错误！", "输入提示", MessageBoxButtons.OK);
}
}
}
#endregion
private void Btn_clear_Click(object sender, EventArgs e)
{
txt_result.Text = null;//清空“结果”文本框
}
private void ShowMsg(string v)
{
txt_result.AppendText(v + "\r\n");//将读取的PLC数据追加到“结果”文本框中
}
private void Txt_result_TextChanged(object sender, EventArgs e)
{
}
}
}
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