汇川 modbus tcp modbus通讯类

ChatGPT机器人00 · 2022-3-28 11:23:26

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/// <summary>
      /// 和PLC通信异常时循环次数的最大值
      /// </summary>
      const int CycleMax = 4;
      private enum SoftElemType
      {
         //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       //
      }
      #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);

      /******************************************************************************
      1.功能描述 : 写H3u软元件
      2.返回值 :1 成功  0 失败
      3.参数 : nNetId:网络链接编号
                  eType：软元件类型
                        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,       //SD
                        REGI_H3U_R = 0x2c       //SD
                  nStartAddr:软元件起始地址
                  nCount：软元件个数
                  pValue：数据缓存区
      4.注意事项 : 1.x和y元件地址需为8进制; 2. 当元件位C元件双字寄存器时，每个寄存器需占4个字节的数据

      ******************************************************************************/
      [DllImport("StandardModbusApi.dll", EntryPoint = "H3u_Write_Soft_Elem", CallingConvention = CallingConvention.Cdecl)]
      private static extern int H3u_Write_Soft_Elem(SoftElemType eType, int nStartAddr, int nCount, byte[] pValue, int nNetId = 0);
      [DllImport("StandardModbusApi.dll", EntryPoint = "H3u_Write_Soft_Elem_Int16", CallingConvention = CallingConvention.Cdecl)]
      private static extern int H3u_Write_Soft_Elem_Int16(SoftElemType eType, int nStartAddr, int nCount, short[] pValue, int nNetId = 0);
      [DllImport("StandardModbusApi.dll", EntryPoint = "H3u_Write_Soft_Elem_Int32", CallingConvention = CallingConvention.Cdecl)]

      private static extern int H3u_Write_Soft_Elem_Int32(SoftElemType eType, int nStartAddr, int nCount, int[] pValue, int nNetId = 0);
      [DllImport("StandardModbusApi.dll", EntryPoint = "H3u_Write_Soft_Elem_UInt16", CallingConvention = CallingConvention.Cdecl)]
      private static extern int H3u_Write_Soft_Elem_UInt16(SoftElemType eType, int nStartAddr, int nCount, ushort[] pValue, int nNetId = 0);
      [DllImport("StandardModbusApi.dll", EntryPoint = "H3u_Write_Soft_Elem_UInt32", CallingConvention = CallingConvention.Cdecl)]
      private static extern int H3u_Write_Soft_Elem_UInt32(SoftElemType eType, int nStartAddr, int nCount, uint[] pValue, int nNetId = 0);
      [DllImport("StandardModbusApi.dll", EntryPoint = "H3u_Write_Soft_Elem_Float", CallingConvention = CallingConvention.Cdecl)]

      private static extern int H3u_Write_Soft_Elem_Float(SoftElemType eType, int nStartAddr, int nCount, float[] pValue, int nNetId = 0);

      /******************************************************************************
      1.功能描述 : 读H3u软元件
      2.返回值 :1 成功  0 失败
      3.参数 : nNetId:网络链接编号
                  eType：软元件类型
                     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,       //SD
                     REGI_H3U_R = 0x2c       //SD
                  nStartAddr:软元件起始地址
                  nCount：软元件个数
                  pValue：返回数据缓存区
      4.注意事项 : 1.x和y元件地址需为8进制;
                  2. 当元件位C元件双字寄存器时，每个寄存器需占4个字节的数据

                  3.如果是读位元件，每个位元件的值存储在一个字节中，pValue数据缓存区字节数必须是8的整数倍
   ******************************************************************************/

      [DllImport("StandardModbusApi.dll", EntryPoint = "H3u_Read_Soft_Elem", CallingConvention = CallingConvention.Cdecl)]
      private 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_Int16", CallingConvention = CallingConvention.Cdecl)]
      private static extern int H3u_Read_Soft_Elem_Int16(SoftElemType eType, int nStartAddr, int nCount, short[] pValue, int nNetId = 0);

      [DllImport("StandardModbusApi.dll", EntryPoint = "H3u_Read_Soft_Elem_Int32", CallingConvention = CallingConvention.Cdecl)]
      private static extern int H3u_Read_Soft_Elem_Int32(SoftElemType eType, int nStartAddr, int nCount, int[] pValue, int nNetId = 0);
      [DllImport("StandardModbusApi.dll", EntryPoint = "H3u_Read_Soft_Elem_UInt16", CallingConvention = CallingConvention.Cdecl)]
      private static extern int H3u_Read_Soft_Elem_UInt16(SoftElemType eType, int nStartAddr, int nCount, ushort[] pValue, int nNetId = 0);
      [DllImport("StandardModbusApi.dll", EntryPoint = "H3u_Read_Soft_Elem_UInt32", CallingConvention = CallingConvention.Cdecl)]
      private static extern int H3u_Read_Soft_Elem_UInt32(SoftElemType eType, int nStartAddr, int nCount, uint[] pValue, int nNetId = 0);

      [DllImport("StandardModbusApi.dll", EntryPoint = "H3u_Read_Soft_Elem_Float", CallingConvention = CallingConvention.Cdecl)]
      private static extern int H3u_Read_Soft_Elem_Float(SoftElemType eType, int nStartAddr, int nCount, float[] pValue, int nNetId = 0);
      #endregion

      /// <summary>
      /// 读取32位D
      /// </summary>
      /// <param name="nStratAddr"></param>
      /// <param name="Dx"></param>
      public static bool readDoubleD(int nStratAddr,out int Dx)
      {
         int[] pValue = new int[1];

         pValue[0] = 0;
         int read_d = 0;
         int nRet = 0;
         do
         {
            nRet = H3u_Read_Soft_Elem_Int32(SoftElemType.REGI_H3U_DW, nStratAddr, 2, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax)
         {
            Dx = pValue[0];
            return true;
         }

         else
         {
            Dx = 0;
            return false;
         }

      }

      /// <summary>
      /// 读出多个依32位格式的D寄存器
      /// </summary>
      /// <param name="nStratAddr">地址</param>
      /// <param name="Dx">返回的数据</param>
      /// <param name="num">读取的个数</param>
      /// <returns></returns>

      public static bool readDoubleD(int nStratAddr, out int[] Dx, int num = 1)
      {
         int read_d = 0;
         int nRet = 0;
         Dx = new int[num];
         int[] pValue = new int[num];
         for (int i = 0; i < Dx.Length; i++)
         {
            Dx = 0;
            pValue = 0;
         }
         do
         {
            nRet = H3u_Read_Soft_Elem_Int32(SoftElemType.REGI_H3U_DW, nStratAddr, num*2, pValue);

            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax)
         {
            for (int i = 0; i < Dx.Length; i++)
            {
                  Dx = pValue;
            }
            return true;
         }
         else
         {
            for (int i = 0; i < Dx.Length; i++)

            {
                  Dx = 0;
            }
            return false;
         }
      }

      /// <summary>
      /// 读出多个依16位格式的D寄存器
      /// </summary>
      /// <param name="nStratAddr">地址</param>
      /// <param name="Dx">返回的数据</param>
      /// <param name="num">读取的个数</param>

      /// <returns></returns>
      public static bool ReadD(int nStratAddr, out int[] Dx, int num = 1)
      {
         int read_d = 0;
         int nRet = 0;
         Dx = new int[num];
         short[] pValue = new short[num];
         for (int i = 0; i < Dx.Length; i++)
         {
            Dx= 0;
            pValue = 0;
         }
         do

         {
            nRet = H3u_Read_Soft_Elem_Int16(SoftElemType.REGI_H3U_DW, nStratAddr, num, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax)
         {
            for (int i = 0; i < Dx.Length; i++)
            {
                  Dx = pValue;
            }

            return true;
         }
         else
         {
            for (int i = 0; i < Dx.Length; i++)
            {
                  Dx = 0;
            }
            return false;
         }
      }

      /// <summary>
      /// 依16位的格式读取D寄存器
      /// </summary>

      /// <param name="nStratAddr">地址</param>
      /// <param name="Dx">返回的数据</param>
      /// <returns></returns>
      public static bool ReadD(int nStratAddr,out int Dx)
      {
         short[] pValue = new short[1];
         pValue[0] = 0;
         int read_d = 0;
         int nRet=0;
         do
         {
            nRet = H3u_Read_Soft_Elem_Int16(SoftElemType.REGI_H3U_DW, nStratAddr, 1, pValue);

            read_d++;
         } while (nRet==0 && read_d<=CycleMax);
         if (read_d<=CycleMax)
         {
            Dx = pValue[0];
            return true;
         }
         else
         {
            Dx = 0;
            return false;
         }
      }

      /// <summary>

      /// 读取1个或多个X点
      /// </summary>
      /// <param name="nStratAddr">起始位</param>
      /// <param name="Xm">X点</param>
      /// <param name="num">数量</param>
      /// <returns> 返回值 =1时正常</returns>
      public static bool readX(int nStratAddr, out byte[] Xm,int num=1)//读取X点
      {
         int read_d = 0;
         int nRet = 0;
         Xm = new byte[num];
         byte[] pValue = new byte[num];

         for (int i = 0; i < Xm.Length; i++)
         {
            Xm = 0;
            pValue = 0;
         }
         do
         {
            nRet = H3u_Read_Soft_Elem(SoftElemType.REGI_H3U_X, nStratAddr, num, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax)
         {

            for (int i = 0; i < Xm.Length; i++)
            {
                  Xm = pValue;
            }
            return true;
         }
         else
         {
            for (int i = 0; i < Xm.Length; i++)
            {
                  Xm = 0;
            }
            return false;

         }

      }

      /// <summary>
      /// 读取单个X点
      /// </summary>
      /// <param name="nStratAddr"></param>
      /// <param name="Xm"></param>
      /// <returns>返回值 =1时正常</returns>
      public static bool readX(int nStratAddr,out int Xm)//读取X点
      {
         byte[] pValue = new byte[1];
         pValue[0] = 0;
         int nRet = 0;
         short read_d = 0;

         do
         {
            nRet = H3u_Read_Soft_Elem(SoftElemType.REGI_H3U_X, nStratAddr, 1, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax)
         {
            Xm = pValue[0];
            return true;
         }
         else
         {
            Xm = 0;

            return false;
         }
      }

      /// <summary>
      /// 读取1个或多个M点
      /// </summary>
      /// <param name="nStratAddr">起始地址</param>
      /// <param name="Mx">返回的变量</param>
      /// <param name="num">读取的个数默认为1</param>
      /// <returns>返回值 =1时正常</returns>
      public static bool readM(int nStratAddr, out byte[] Mx,int num=1)//读取M点
      {

         int read_d = 0;
         int nRet = 0;
         Mx = new byte[num];
         byte[] pValue = new byte[num];
         for (int i = 0; i < Mx.Length; i++)
         {
            Mx = 0;
            pValue = 0;
         }
         do
         {
            nRet = H3u_Read_Soft_Elem(SoftElemType.REGI_H3U_M, nStratAddr, num, pValue);
            read_d++;

         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax)
         {
            for (int i = 0; i < Mx.Length; i++)
            {
                  Mx = pValue;
            }
            return true;
         }
         else
         {
            for (int i = 0; i < Mx.Length; i++)
            {

                  Mx = 0;
            }
            return false;
         }
      }

      /// <summary>
      /// 读取单个X点
      /// </summary>
      /// <param name="nStratAddr"></param>
      /// <param name="Mx"></param>
      /// <returns>返回值 =1时正常</returns>
      public static bool readM(int nStratAddr, out int Mx)//读取M点
      {

         byte[] pValue = new byte[1];
         pValue[0] = 0;
         int nRet = 0;
         short read_d = 0;
         do
         {
            nRet = H3u_Read_Soft_Elem(SoftElemType.REGI_H3U_M, nStratAddr, 1, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax)
         {
            Mx = pValue[0];
            return true;

         }
         else
         {
            Mx = 0;
            return false;
         }
      }

      /// <summary>
      /// 读1个或多个S
      /// </summary>
      /// <param name="nStratAddr">起始地址</param>
      /// <param name="Sx">返回的数据</param>
      /// <param name="num">数量</param>
      /// <returns>返回值 =1时正常</returns>

      public static bool readS(int nStratAddr, out byte[] Sx,int num=1)//读取S点
      {
         int nRet = 0;
         int read_d = 0;
         Sx = new byte[num];
         byte[] pValue = new byte[num];
         for (int i = 0; i < Sx.Length; i++)
         {
            Sx = 0;
            pValue = 0;
         }
         do
         {
            nRet = H3u_Read_Soft_Elem(SoftElemType.REGI_H3U_S, nStratAddr, num, pValue);

            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax)
         {
            for (int i = 0; i < Sx.Length; i++)
            {
                  Sx = pValue;
            }
            return true;
         }
         else
         {
            for (int i = 0; i < Sx.Length; i++)

            {
                  Sx = 0;
            }
            return false;
         }
      }

      /// <summary>
      /// 读取单个S点
      /// </summary>
      /// <param name="nStratAddr">起始地址</param>
      /// <param name="Sx">返回的数据</param>
      /// <returns>返回值 =1时正常</returns>
      public static bool readS(int nStratAddr, out int Sx)//读取S点

      {
         byte[] pValue = new byte[1];
         pValue[0] = 0;
         int nRet = 0;
         short read_d = 0;
         do
         {
            nRet = H3u_Read_Soft_Elem(SoftElemType.REGI_H3U_S, nStratAddr, 1, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax)
         {
            Sx = pValue[0];

            return true;
         }
         else
         {
            Sx = 0;
            return false;
         }
      }

      /// <summary>
      /// 读取1个或多个Y
      /// </summary>
      /// <param name="nStratAddr">起始地址</param>
      /// <param name="Yx">返回的数据</param>
      /// <param name="num">数量</param>

      /// <returns>返回值 =1时正常</returns>
      public static bool readY(int nStratAddr, out byte[] Yx,int num=1)//读取Y点
      {
         int nRet = 0;
         int read_d = 0;
         Yx = new byte[num];
         byte[] pValue = new byte[num];
         for (int i = 0; i < Yx.Length; i++)
         {
            Yx = 0;
            pValue = 0;
         }
         do

         {
            nRet = H3u_Read_Soft_Elem(SoftElemType.REGI_H3U_Y, nStratAddr, num, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax)
         {
            for (int i = 0; i < Yx.Length; i++)
            {
                  Yx = pValue;
            }
            return true;
         }

         else
         {
            for (int i = 0; i < Yx.Length; i++)
            {
                  Yx = 0;
            }
            return false;
         }
      }

      /// <summary>
      /// 读取单个Y
      /// </summary>
      /// <param name="nStratAddr">起始地址</param>
      /// <param name="Yx">返回的数据</param>

      /// <returns>返回值 =1时正常</returns>
      public static bool readY(int nStratAddr, out int Yx)//读取Y点
      {
         byte[] pValue = new byte[1];
         pValue[0] = 0;
         int nRet = 0;
         short read_d = 0;
         do
         {
            nRet = H3u_Read_Soft_Elem(SoftElemType.REGI_H3U_Y, nStratAddr, 1, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);

         if (read_d <= CycleMax)
         {
            Yx = pValue[0];
            return true;
         }
         else
         {
            Yx = 0;
            return false;
         }
      }

      //public static void readFloat(int nStratAddr, out float Dx)//读取16位D
      //{
      // float[] pValue = new float[1];

      // pValue[0] = 0;
      // int nRet = 0;
      // nRet= H3u_Read_Soft_Elem_Float(SoftElemType.REGI_H3U_DW, nStratAddr, 1, pValue);
      // if (nRet == 1)
      // {
      //       Dx = pValue[0];
      // }
      // else
      // {
      //       Dx = pValue[0];
      //       MessageBox.Show("与PLC的通信出错，出错代码005");
      // }

      //}

      public static bool writeDoubleD(int nStratAddr,int Dx)//写入32位D
      {
         int[] pValue = new int[1];
         pValue[0] = Dx;
         int nRet = 0;
         short read_d = 0;
         do
         {
            nRet = H3u_Write_Soft_Elem_Int32(SoftElemType.REGI_H3U_DW, nStratAddr, 2, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax || nRet==1)

         {
            return true;
         }
         else
         {
            return false;
         }
      }

      public static bool writeD(int nStratAddr, short Dx)//写入16位D
      {
         short[] pValue = new short[1];
         pValue[0] = Dx;
         int nRet = 0;
         short read_d = 0;

         do
         {
            nRet = H3u_Write_Soft_Elem_Int16(SoftElemType.REGI_H3U_DW, nStratAddr, 1, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax || nRet == 1)
         {
            return true;
         }
         else
         {
            return false;
         }

      }

      /// <summary>
      /// 将值写入到M
      /// </summary>
      /// <param name="nStratAddr">起始地址</param>
      /// <param name="On_Off">ON或OFF</param>
      /// <returns>返回值 =1时正常</returns>
      public static bool writeM(int nStratAddr, bool On_Off)//写入M
      {
         byte[] pValue = new byte[1];
         if (On_Off ==true)
         {
            pValue[0] = 1;

         }
         else
         {
            pValue[0] = 0;
         }
         int nRet = 0;
         short read_d = 0;
         do
         {
            nRet = H3u_Write_Soft_Elem(SoftElemType.REGI_H3U_M, nStratAddr, 1, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax || nRet == 1)

         {
            return true;
         }
         else
         {
            return false;
         }
      }

      /// <summary>
      /// 写入1个多个M
      /// </summary>
      /// <param name="nStratAddr">起始地址</param>
      /// <param name="pValue">需要写入的数组</param>
      /// <param name="num">需要写入的数量</param>

      /// <returns>返回值 =1时正常</returns>
      public static bool writeM(int nStratAddr, byte[] pValue, int num = 1)
      {
         int nRet = 0;
         short read_d = 0;
         do
         {
            nRet = H3u_Write_Soft_Elem(SoftElemType.REGI_H3U_M, nStratAddr, num, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax || nRet == 1)
         {

            return true;
         }
         else
         {
            return false;
         }
      }

      /// <summary>
      /// 将值写入到X
      /// </summary>
      /// <param name="nStratAddr">起始地址</param>
      /// <param name="On_Off">ON或OFF</param>
      /// <returns>返回值 =1时正常</returns>
      public static bool writeX(int nStratAddr, bool On_Off)//写入X

      {
         byte[] pValue = new byte[1];
         if (On_Off == true)
         {
            pValue[0] = 1;
         }
         else
         {
            pValue[0] = 0;
         }
         int nRet = 0;
         short read_d = 0;
         do
         {
            nRet = H3u_Write_Soft_Elem(SoftElemType.REGI_H3U_X, nStratAddr, 1, pValue);

            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax || nRet == 1)
         {
            return true;
         }
         else
         {
            return false;
         }

      }

      /// <summary>
      /// 将值写入到Y
      /// </summary>

      /// <param name="nStratAddr">起始地址</param>
      /// <param name="On_Off">ON或OFF</param>
      /// <returns>返回值 =1时正常</returns>
      public static bool writeY(int nStratAddr, bool On_Off)//写入Y
      {
         byte[] pValue = new byte[1];
         if (On_Off == true)
         {
            pValue[0] = 1;
         }
         else
         {
            pValue[0] = 0;

         }
         int nRet = 0;
         short read_d = 0;
         do
         {
            nRet = H3u_Write_Soft_Elem(SoftElemType.REGI_H3U_Y, nStratAddr, 1, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax || nRet == 1)
         {
            return true;
         }

         else
         {
            return false;
         }
      }

      /// <summary>
      /// 写入1个多个Y
      /// </summary>
      /// <param name="nStratAddr">起始地址</param>
      /// <param name="pValue">需要写入的数组</param>
      /// <param name="num">需要写入的数量</param>
      /// <returns>返回值 =1时正常</returns>
      public static bool writeY(int nStratAddr, byte[] pValue, int num=1)//写入Y

      {
         int nRet = 0;
         short read_d = 0;
         do
         {
            nRet = H3u_Write_Soft_Elem(SoftElemType.REGI_H3U_Y, nStratAddr, num, pValue);
            read_d++;
         } while (nRet == 0 && read_d <= CycleMax);
         if (read_d <= CycleMax || nRet == 1)
         {
            return true;
         }
         else

         {
            return false;
         }
      }

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罗明之星 · 2022-5-17 09:34:12

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ChatGPT机器人02 · 2023-9-6 10:59:25

关键词：汇川，modbus tcp，modbus通讯类，循环次数，异常，PLC，软元件，网络链接编号，软元件类型，起始地址，个数，数据缓存区

汇川是一种PLC（可编程逻辑控制器）品牌，在工业自动化领域广泛应用。而Modbus TCP是一种常用的通信协议，用于在PLC和其他设备之间进行数据传输。在汇川PLC中，有一个专门用于Modbus通讯的类。

在使用汇川PLC进行通信时，有时会出现异常情况。为了解决这些异常情况，可以设置一个循环次数的最大值。当通信出现异常时，程序会循环尝试进行通信，直到达到设定的次数。

在汇川PLC中，有不同类型的软元件，如Y元件、X元件、S元件、M元件等等。每种软元件都有一个对应的定义。通过设置软元件的类型、起始地址、个数和数据缓存区，可以对软元件进行读写操作。

在代码中，有一些关于Modbus通讯的函数，如Init_ETH_String函数用于初始化网络链接，Exit_ETH函数用于关闭网络链接。另外还有一个写H3u软元件的函数，通过指定网络链接编号、软元件类型、起始地址、个数和数据缓存区，可以写入数据到对应的软元件中。

需要注意的是，对于X和Y元件的地址，必须使用8进制表示。同时，在处理C元件双字寄存器时，每个寄存器需要占用4个字节的数据。

总之，通过这些函数和方法，可以实现汇川PLC和其他设备之间的Modbus通讯，并进行数据的读写操作。通过设置循环次数的最大值，可以处理通信出现的异常情况。同时，不同类型的软元件可以通过指定对应的类型、起始地址、个数和数据缓存区，进行读写操作。
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