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【源码截图】

【源码示例】

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;using S7.Net;namespace WindowsFormsApp1{ public partial class Form1 : Form { //定义PLC类型 Plc S71500; public Form1() { InitializeComponent(); } private void Form1_Load(object sender, EventArgs e) { //下拉框添加数据类型项 Data_Type.Items.Add("Bool"); Data_Type.Items.Add("Int"); Data_Type.Items.Add("DInt"); Data_Type.Items.Add("Real"); Data_Type.Text = "Real"; //使能、禁止按钮操作 button1.Enabled = true; button2.Enabled = false; Read_Data.Enabled = false; Write_Data.Enabled = false; } private void label4_Click(object sender, EventArgs e) { } private void comboBox1_SelectedIndexChanged(object sender, EventArgs e) { } private void button1_Click(object sender, EventArgs e) { //创建PLC对象 S71500 = new Plc(CpuType.S71500, IP_Address.Text, Convert.ToInt16(Rack.Text), Convert.ToInt16(Slot.Text)); //调用S7.NET中的方法连接PLC S71500.Open(); //连接成功后使能操作按钮 if (S71500.IsConnected) { button1.Enabled = false; button2.Enabled = true; Read_Data.Enabled = true; Write_Data.Enabled = true; textBox1.Text = "已连接到PLC"; } else textBox1.Text = "PLC 连接不成功，请检查IP地址、机架、插槽等是否正确"; } private void button2_Click(object sender, EventArgs e) { //调用S7.NET中的方法断开PLC S71500.Close(); //断开成功后使能操作按钮 if (!S71500.IsConnected) { button1.Enabled = true; button2.Enabled = false; Read_Data.Enabled = false; Write_Data.Enabled = false; textBox1.Text = "PLC断开成功"; } else textBox1.Text = "PLC断开不成功"; } private void Read_Data_Click(object sender, EventArgs e) { int Data_Type_Value = 0; if (Data_Type.Text == "Bool") Data_Type_Value = 1; else if (Data_Type.Text == "Int") Data_Type_Value = 2; else if (Data_Type.Text == "DInt") Data_Type_Value = 3; else if (Data_Type.Text == "Real") Data_Type_Value = 4; else Data_Type_Value = 0; switch (Data_Type_Value) { case 1: Current_Value.Text = Convert.ToString(S71500.Read(DataType.DataBlock,Convert.ToInt16(DB_Number.Text), Convert.ToInt16(Start_Address.Text), VarType.Bit, 1, 0)); break; case 2: Current_Value.Text = Convert.ToString(S71500.Read(DataType.DataBlock, Convert.ToInt16(DB_Number.Text), Convert.ToInt16(Start_Address.Text), VarType.Int, 1, 0)); break; case 3: Current_Value.Text = Convert.ToString(S71500.Read(DataType.DataBlock, Convert.ToInt16(DB_Number.Text), Convert.ToInt16(Start_Address.Text), VarType.DInt, 1, 0)); break; case 4: Current_Value.Text = Convert.ToString(S71500.Read(DataType.DataBlock, Convert.ToInt16(DB_Number.Text), Convert.ToInt16(Start_Address.Text), VarType.Real, 1, 0)); break; default: break; } } private void Write_Data_Click(object sender, EventArgs e) { int Data_Type_Value = 0; if (Data_Type.Text == "Bool") Data_Type_Value = 1; else if (Data_Type.Text == "Int") Data_Type_Value = 2; else if (Data_Type.Text == "DInt") Data_Type_Value = 3; else if (Data_Type.Text == "Real") Data_Type_Value = 4; else Data_Type_Value = 0; switch (Data_Type_Value) { case 1: S71500.WriteBit(DataType.DataBlock, Convert.ToInt16(DB_Number.Text), Convert.ToInt16(Start_Address.Text),0, Convert.ToBoolean(Write_Value.Text)); break; case 2: S71500.Write(DataType.DataBlock, Convert.ToInt16(DB_Number.Text), Convert.ToInt16(Start_Address.Text), Convert.ToInt16(Write_Value.Text)); break; case 3: S71500.Write(DataType.DataBlock, Convert.ToInt16(DB_Number.Text), Convert.ToInt16(Start_Address.Text), Convert.ToInt32(Write_Value.Text)); break; case 4: S71500.Write(DataType.DataBlock, Convert.ToInt16(DB_Number.Text), Convert.ToInt16(Start_Address.Text), Convert.ToDouble(Write_Value.Text)); break; default: break; } } }}