【C#】上位机与西门子200SMART通讯测试

using System.Windows.Forms;
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 S7.Net;


namespace HZCsharpProject01
{
    public partial class FormCommucation : Form
    {
        public FormCommucation()
        {
            InitializeComponent();
        }
        Plc plc;//声明plc连接对象
 
        private void btnConnect_Click(object sender, EventArgs e)
        {
            string TypeName = txtPLCType.Text;//PLC型号名称
            string Ip = txtIp.Text;//plcIp地址
            switch (TypeName)
            {
                case "200":
                case "1200":
                    /*S7.Net.dll类库中没有S7-200Smart类型，想跟S7-200Smart通讯选择S71200即可*/ 最新S7.NET支持smart200了
                    plc = new Plc(CpuType.S71200, Ip, 0, 1);//创建plc实例
                    break;
                case "300":
                    plc = new Plc(CpuType.S7300, Ip, 0, 1);//创建plc实例
                    break;
                case "400":
                    plc = new Plc(CpuType.S7400, Ip, 0, 1);//创建plc实例
                    break;
                case "1500":
                    plc = new Plc(CpuType.S71500, Ip, 0, 1);//创建plc实例
                    break;
            }

            plc.Open();//连接plc
            if (plc.IsConnected)//检查plc是否连接上
            {
                MessageBox.Show("与PLC连接成功！");
                //连接成功
            }
            else
            {
                MessageBox.Show("与PLC连接失败！");
                //连接失败
            }
               
        }


        private void btnWrite_Click(object sender, EventArgs e)
        {
            //string address = txtAddress.Text;//寄存地址
            //string writedata = txtWriteData.Text;//写入数据
            //plc.Write(address, writedata);

            if (plc.IsConnected == false)
            {
                MessageBox.Show("未连接PLC!", "连接提示", MessageBoxButtons.OK);
            }
            else
            {
                try
                {
                    string[] arr = (txtAddress .Text.ToUpper()).Split('.');
                    string valuetype = arr[1].Substring(0, 3);

                    if (valuetype == "DBX")
                    {
                        plc.Write(txtAddress .Text.ToUpper(), Convert.ToBoolean(txtWriteData .Text));
                    }

                    else if (valuetype == "DBW")
                    {
                        var value = short.Parse(txtWriteData .Text);
                        plc.Write(txtAddress .Text.ToUpper(), value);
                    }

                    else if (valuetype == "DBD")
                    {
                        float  value = float .Parse(txtWriteData.Text);
                        //double value = double.Parse(txtWriteData.Text);
                        plc.Write(txtAddress.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！"+Ex, "输入提示", MessageBoxButtons.OK);
                }


            }

        }

        private void btnReadSingleData_Click(object sender, EventArgs e)
        {
            //string address = txtAddress2.Text;//寄存地址
            //var bytes = plc.Read(address);
            //txtReadSingleData.Text = bytes.ToString();

            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 = (txtAddress2 .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
                    //西门子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(txtAddress2 .Text.ToUpper());
                        txtReadSingleData.Text=txtAddress2.Text + ":" + test1.ToString();
                    }

                    else if (valuetype == "DBW")
                    {
                        short test3 = ((ushort)plc.Read(txtAddress2 .Text.ToUpper())).ConvertToShort();
                        txtReadSingleData.Text = txtAddress2 .Text + ":" + test3.ToString();
                    }

                    else if (valuetype == "DBD")
                    {
                        double test5 = ((uint)plc.Read(txtAddress2 .Text.ToUpper())).ConvertToFloat();
                        txtReadSingleData.Text = txtAddress2 .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！"+Ex , "输入提示", MessageBoxButtons.OK);
                }
            }

        }


        private void btnDisConnect_Click(object sender, EventArgs e)
        {
            plc.Close();//断开PLC
        }
    }





}

我用的是VS2015版本，框架是4.6。NUGET下载S7.DLL时要下载以前的版本，最新版本框架都是4.7以上了。