松下PLC 通讯（modbus）

  PLC 通讯 demo

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;


using System.Windows;
using System.Runtime.InteropServices;



namespace ModbusApiTestForCsharp_1
{
    public enum SoftElemType
    {
        //AM600
        ELEM_QX = 0     //QX元件
        ELEM_MW = 1     //MW元件
        ELEM_X = 2		 //X元件（对应QX200~QX300）
        ELEM_Y = 3		 //Y元件（对应QX300~QX400）

        //H3U
        REGI_H3U_Y = 0x20       //Y元件的定义	
        REGI_H3U_X = 0x21		//X元件的定义							
        REGI_H3U_S = 0x22		//S元件的定义				
        REGI_H3U_M = 0x23		//M元件的定义							
        REGI_H3U_TB = 0x24		//T位元件的定义				
        REGI_H3U_TW = 0x25		//T字元件的定义				
        REGI_H3U_CB = 0x26		//C位元件的定义				
        REGI_H3U_CW = 0x27		//C字元件的定义				
        REGI_H3U_DW = 0x28		//D字元件的定义				
        REGI_H3U_CW2 = 0x29	    //C双字元件的定义
        REGI_H3U_SM = 0x2a		//SM
        REGI_H3U_SD = 0x2b		//
        REGI_H3U_R = 0x2c		//

    }
    public partial class Form1 : Form
    {
        #region //标准库
        [DllImport（“StandardModbusApi.dll“ EntryPoint = “Init_ETH_String“ CallingConvention = CallingConvention.Cdecl）]
        public static extern bool Init_ETH_String（string sIpAddr int nNetId = 0 int IpPort = 502）;

        [DllImport（“StandardModbusApi.dll“ EntryPoint = “Exit_ETH“ CallingConvention = CallingConvention.Cdecl）]
        public static extern bool Exit_ETH（int nNetId = 0）;

        [DllImport（“StandardModbusApi.dll“ EntryPoint = “H3u_Write_Soft_Elem“ CallingConvention = CallingConvention.Cdecl）]
        public static extern int H3u_Write_Soft_Elem（SoftElemType eType int nStartAddr int nCount byte[] pValue int nNetId = 0）;

        [DllImport（“StandardModbusApi.dll“ EntryPoint = “H3u_Read_Soft_Elem“ CallingConvention = CallingConvention.Cdecl）]
        public static extern int H3u_Read_Soft_Elem（SoftElemType eType int nStartAddr int nCount byte[] pValue int nNetId = 0）;

        [DllImport（“StandardModbusApi.dll“ EntryPoint = “H3u_Read_Soft_Elem_Float“ CallingConvention = CallingConvention.Cdecl）]
        public static extern int H3u_Read_Soft_Elem_Float（SoftElemType eType int nStartAddr int nCount float[] pValue int nNetId = 0）;


        [DllImport（“StandardModbusApi.dll“ EntryPoint = “Am600_Write_Soft_Elem“ CallingConvention = CallingConvention.Cdecl）]
        public static extern int Am600_Write_Soft_Elem（SoftElemType eType int nStartAddr int nCount byte[] pValue int nNetId = 0）;

        [DllImport（“StandardModbusApi.dll“ EntryPoint = “Am600_Read_Soft_Elem“ CallingConvention = CallingConvention.Cdecl）]
        public static extern int Am600_Read_Soft_Elem（SoftElemType eType int nStartAddr int nCount byte[] pValue int nNetId = 0）;

        #endregion

        public Form1（）
        {
            InitializeComponent（）;
            textBox1.Te

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

    ..A..H.     32256  2020-09-01 15:17  ModbusApiTestForCsharp_1\.vs\ModbusApiTestForCsharp_1\v14\.suo

     文件       4940  2020-09-02 14:00  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Debug\Api.log

     文件      14336  2020-09-02 14:03  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Debug\ModbusApiTestForCsharp_1.exe

     文件      30208  2020-09-02 14:03  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Debug\ModbusApiTestForCsharp_1.pdb

     文件      22696  2020-09-02 14:01  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Debug\ModbusApiTestForCsharp_1.vshost.exe

     文件        490  2019-03-19 12:46  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Debug\ModbusApiTestForCsharp_1.vshost.exe.manifest

     文件     266752  2016-12-29 18:38  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Debug\ModbusTcpAPI.dll

     文件     239616  2016-12-29 18:38  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Debug\StandardModbusApi.dll

     文件      10240  2016-12-30 09:51  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Release\ModbusApiTestForCsharp_1.exe

     文件      22016  2016-12-30 09:51  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Release\ModbusApiTestForCsharp_1.pdb

     文件      11600  2016-12-30 09:44  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Release\ModbusApiTestForCsharp_1.vshost.exe

     文件        490  2009-08-31 00:40  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Release\ModbusApiTestForCsharp_1.vshost.exe.manifest

     文件     266752  2016-12-29 18:38  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Release\ModbusTcpAPI.dll

     文件     239616  2016-12-29 18:38  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\bin\Release\StandardModbusApi.dll

     文件      11138  2020-09-02 14:02  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\Form1.cs

     文件       9379  2020-09-02 13:59  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\Form1.Designer.cs

     文件       5817  2020-09-02 13:59  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\Form1.resx

     文件       3707  2016-12-30 09:44  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1.csproj

     文件       2870  2020-09-01 15:12  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Debug\DesignTimeResolveAssemblyReferences.cache

     文件       7268  2020-09-02 11:03  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Debug\DesignTimeResolveAssemblyReferencesInput.cache

     文件       3046  2020-09-02 14:03  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Debug\ModbusApiTestForCsharp_1.csproj.FileListAbsolute.txt

     文件       1012  2020-09-02 14:03  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Debug\ModbusApiTestForCsharp_1.csproj.GenerateResource.Cache

     文件      14336  2020-09-02 14:03  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Debug\ModbusApiTestForCsharp_1.exe

     文件        180  2020-09-02 14:03  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Debug\ModbusApiTestForCsharp_1.Form1.resources

     文件      30208  2020-09-02 14:03  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Debug\ModbusApiTestForCsharp_1.pdb

     文件        180  2020-09-02 14:03  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Debug\ModbusApiTestForCsharp_1.Properties.Resources.resources

     文件       6272  2016-12-30 09:51  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Release\DesignTimeResolveAssemblyReferencesInput.cache

     文件        750  2016-12-30 09:50  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Release\ModbusApiTestForCsharp_1.csproj.FileListAbsolute.txt

     文件        975  2016-12-30 09:50  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Release\ModbusApiTestForCsharp_1.csproj.GenerateResource.Cache

     文件      10240  2016-12-30 09:51  ModbusApiTestForCsharp_1\ModbusApiTestForCsharp_1\obj\x86\Release\ModbusApiTestForCsharp_1.exe

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