花了两三天写了一个这个，本来想着自己用的，看到有很多替代品，果断开源了吧:
下载地址:/t39q/MitsubishiFX-PLC-XYS
以下是原理，后面有帮助类和调用方法
调用方法
private void button27_Click(object sender, EventArgs e){//开，置位 string address = textBox3.Text.Substring(0, 1);if (address == "Y"){MitsubishiPLC_XYControl.SendControlCmd(PLC_SerialPort, MitsubishiPLC_XYControl.OpenY(textBox3.Text));}else if (address=="X"){MitsubishiPLC_XYControl.SendControlCmd(PLC_SerialPort, MitsubishiPLC_XYControl.OpenX(textBox3.Text));}else if (address == "S"){MitsubishiPLC_XYControl.SendControlCmd(PLC_SerialPort, MitsubishiPLC_XYControl.OpenS(textBox3.Text));}}private void button28_Click(object sender, EventArgs e){//关，复位string address = textBox3.Text.Substring(0, 1);if (address == "Y"){MitsubishiPLC_XYControl.SendControlCmd(PLC_SerialPort, MitsubishiPLC_XYControl.CloseY(textBox3.Text));}else if (address == "S"){MitsubishiPLC_XYControl.SendControlCmd(PLC_SerialPort, MitsubishiPLC_XYControl.CloseS(textBox3.Text));}}private void button26_Click(object sender, EventArgs e){//读string address = textBox3.Text.Substring(0, 1);if (address == "X"){textBox4.Text= MitsubishiPLC_XYControl.ReadXStatus(PLC_SerialPort, textBox3.Text);}else if (address == "S"){textBox4.Text = MitsubishiPLC_XYControl.ReadSStatus(PLC_SerialPort, textBox3.Text);}}
using System;using System.Collections.Generic;using System.IO.Ports;using System.Linq;using System.Text;using System.Threading;using System.Threading.Tasks;namespace 三菱PLC_XY控制{class MitsubishiPLC_XYControl{public static byte[] OpenY(string Y){//bool Flag = false;byte[] OpenByte = new byte[9];byte[] YAddressByte = GetYAddress(Y);OpenByte[0] = 0x02;OpenByte[1] = 0x37;OpenByte[2] = YAddressByte[0];OpenByte[3] = YAddressByte[1]; OpenByte[4] = YAddressByte[2]; OpenByte[5] = YAddressByte[3];OpenByte[6] = 0x03;byte[] CheckSumByte = new byte[6];for (int i = 1; i < CheckSumByte.Length+1; i++){CheckSumByte[i-1] = OpenByte[i];}byte[] Check2Byte = new byte[2];Check2Byte = CheckSum(CheckSumByte);OpenByte[7] = Check2Byte[0];OpenByte[8] = Check2Byte[1];return OpenByte;}public static byte[] OpenX(string X){//bool Flag = false;byte[] OpenByte = new byte[9];byte[] XAddressByte = GetXAddress(X);OpenByte[0] = 0x02;OpenByte[1] = 0x37;OpenByte[2] = XAddressByte[0];OpenByte[3] = XAddressByte[1];OpenByte[4] = XAddressByte[2];OpenByte[5] = XAddressByte[3];OpenByte[6] = 0x03;byte[] CheckSumByte = new byte[6];for (int i = 1; i < CheckSumByte.Length + 1; i++){CheckSumByte[i - 1] = OpenByte[i];}byte[] Check2Byte = new byte[2];Check2Byte = CheckSum(CheckSumByte);OpenByte[7] = Check2Byte[0];OpenByte[8] = Check2Byte[1];return OpenByte;}public static byte[] OpenS(string S){//bool Flag = false;byte[] OpenByte = new byte[9];byte[] SAddressByte = GetSAddress(S);OpenByte[0] = 0x02;OpenByte[1] = 0x37;OpenByte[2] = SAddressByte[0];OpenByte[3] = SAddressByte[1];OpenByte[4] = SAddressByte[2];OpenByte[5] = SAddressByte[3];OpenByte[6] = 0x03;byte[] CheckSumByte = new byte[6];for (int i = 1; i < CheckSumByte.Length + 1; i++){CheckSumByte[i - 1] = OpenByte[i];}byte[] Check2Byte = new byte[2];Check2Byte = CheckSum(CheckSumByte);OpenByte[7] = Check2Byte[0];OpenByte[8] = Check2Byte[1];return OpenByte;}public static bool SendControlCmd(SerialPort serialPort,byte[] bytes){bool Flag = false;for (int i = 0; i < 3; i++){try{serialPort.Write(bytes, 0, bytes.Length);Thread.Sleep(50);byte[] RcvBytes = new byte[1];serialPort.Read(RcvBytes, 0, 1);if (RcvBytes[0] != 6){continue;}else{Flag = true;break;}}catch (Exception){continue;//throw;}}return Flag;}public static string ReadXStatus(SerialPort serialPort, string X){string OutResult = "";string Result = "";if (MitsubishiPLC_XYControl.SendReadCmd(serialPort, MitsubishiPLC_XYControl.ReadX(X),X, out OutResult)){Result = OutResult;}else{Result = "-1";}return Result;}public static string ReadSStatus(SerialPort serialPort, string S){string OutResult = "";string Result = "";if (MitsubishiPLC_XYControl.SendReadCmdS(serialPort, MitsubishiPLC_XYControl.ReadS(S),S, out OutResult)){Result = OutResult;}else{Result = "-1";}return Result;}public static bool SendReadCmd(SerialPort serialPort, byte[] bytes,string X,out string Result){string BinResult="";Result = "";bool Flag = false;for (int j = 0; j < 3; j++){try{serialPort.Write(bytes, 0, bytes.Length);Thread.Sleep(50);byte[] RcvBytes = new byte[8];serialPort.Read(RcvBytes, 0, RcvBytes.Length);byte[] CheckSumByte = new byte[5];for (int i = 1; i < CheckSumByte.Length + 1; i++){CheckSumByte[i - 1] = RcvBytes[i];}byte[] Check2Byte = new byte[2];Check2Byte = CheckSum(CheckSumByte);if (RcvBytes[6] == Check2Byte[0] &&RcvBytes[7] == Check2Byte[1]){//02 30 41 38 30 03 44 43 // 从第二个字节算起，顺序为1032，38 30 30 41//当进行按字节转换为ASCII时，高位在右边byte[] ResultByte = new byte[4];ResultByte[0] = RcvBytes[3]; //3ResultByte[1] = RcvBytes[4]; //2ResultByte[2] = RcvBytes[1]; //1ResultByte[3] = RcvBytes[2]; //0string HexResult = Encoding.ASCII.GetString(ResultByte);BinResult = Convert.ToString(Convert.ToInt32(HexResult, 16), 2).PadLeft(16, '0');BinResult = BinResult.Substring(BinResult.Length - 8, 8);Result = JudgingByBit(BinResult, X);Flag = true;break;}else{continue;}}catch (Exception){continue;//throw;}}return Flag;}public static bool SendReadCmdS(SerialPort serialPort, byte[] bytes, string S, out string Result){string BinResult = "";Result = "";bool Flag = false;for (int j = 0; j < 3; j++){try{serialPort.Write(bytes, 0, bytes.Length);Thread.Sleep(50);byte[] RcvBytes = new byte[8];serialPort.Read(RcvBytes, 0, RcvBytes.Length);byte[] CheckSumByte = new byte[5];for (int i = 1; i < CheckSumByte.Length + 1; i++){CheckSumByte[i - 1] = RcvBytes[i];}byte[] Check2Byte = new byte[2];Check2Byte = CheckSum(CheckSumByte);if (RcvBytes[6] == Check2Byte[0] &&RcvBytes[7] == Check2Byte[1]){byte[] ResultByte = new byte[4];//02 30 41 38 30 03 44 43 // 从第二个字节算起，顺序为1032，38 30 30 41//当进行按字节转换为ASCII时，高位在右边ResultByte[0] = RcvBytes[3]; //3ResultByte[1] = RcvBytes[4]; //2ResultByte[2] = RcvBytes[1]; //1ResultByte[3] = RcvBytes[2]; //0string HexResult = Encoding.ASCII.GetString(ResultByte);BinResult= Convert.ToString(Convert.ToInt32(HexResult, 16), 2).PadLeft(16, '0');BinResult = BinResult.Substring(BinResult.Length - 8, 8);Result = JudgingByBitS(BinResult, S);Flag = true;break;}else{continue;}}catch (Exception){continue;//throw;}}return Flag;}public static string JudgingByBit(string BinResult,string X){char[] BinResultArray = BinResult.ToCharArray();string Result = "";switch (X){case "X0":Result = BinResultArray[7].ToString();break;case "X1":Result = BinResultArray[6].ToString();break;case "X2":Result = BinResultArray[5].ToString();break;case "X3":Result = BinResultArray[4].ToString();break;case "X4":Result = BinResultArray[3].ToString();break;case "X5":Result = BinResultArray[2].ToString();break;case "X6":Result = BinResultArray[1].ToString();break;case "X7":Result = BinResultArray[0].ToString();break;case "X10":Result = BinResultArray[7].ToString();break;case "X11":Result = BinResultArray[6].ToString();break;case "X12":Result = BinResultArray[5].ToString();break;case "X13":Result = BinResultArray[4].ToString();break;case "X14":Result = BinResultArray[3].ToString();break;case "X15":Result = BinResultArray[2].ToString();break;case "X16":Result = BinResultArray[1].ToString();break;case "X17":Result = BinResultArray[0].ToString();break;}return Result;}public static string JudgingByBitS(string BinResult, string S){char[] BinResultArray = BinResult.ToCharArray();string Result = "";switch (S){case "S0":Result = BinResultArray[7].ToString();break;case "S1":Result = BinResultArray[6].ToString();break;case "S2":Result = BinResultArray[5].ToString();break;case "S3":Result = BinResultArray[4].ToString();break;case "S4":Result = BinResultArray[3].ToString();break;case "S5":Result = BinResultArray[2].ToString();break;case "S6":Result = BinResultArray[1].ToString();break;case "S7":Result = BinResultArray[0].ToString();break;case "S8":Result = BinResultArray[7].ToString();break;case "S9":Result = BinResultArray[6].ToString();break;case "S10":Result = BinResultArray[5].ToString();break;case "S11":Result = BinResultArray[4].ToString();break;case "S12":Result = BinResultArray[3].ToString();break;case "S13":Result = BinResultArray[2].ToString();break;case "S14":Result = BinResultArray[1].ToString();break;case "S15":Result = BinResultArray[0].ToString();break;}return Result;}public static byte[] CloseY(string Y){//bool Flag = false;byte[] OpenByte = new byte[9];byte[] YAddressByte = GetYAddress(Y);OpenByte[0] = 0x02;OpenByte[1] = 0x38;OpenByte[2] = YAddressByte[0];OpenByte[3] = YAddressByte[1];OpenByte[4] = YAddressByte[2];OpenByte[5] = YAddressByte[3];OpenByte[6] = 0x03;byte[] CheckSumByte = new byte[6];for (int i = 1; i < CheckSumByte.Length + 1; i++){CheckSumByte[i - 1] = OpenByte[i];}byte[] Check2Byte = new byte[2];Check2Byte = CheckSum(CheckSumByte);OpenByte[7] = Check2Byte[0];OpenByte[8] = Check2Byte[1];return OpenByte;}public static byte[] CloseS(string S){//bool Flag = false;byte[] OpenByte = new byte[9];byte[] SAddressByte = GetSAddress(S);OpenByte[0] = 0x02;OpenByte[1] = 0x38;OpenByte[2] = SAddressByte[0];OpenByte[3] = SAddressByte[1];OpenByte[4] = SAddressByte[2];OpenByte[5] = SAddressByte[3];OpenByte[6] = 0x03;byte[] CheckSumByte = new byte[6];for (int i = 1; i < CheckSumByte.Length + 1; i++){CheckSumByte[i - 1] = OpenByte[i];}byte[] Check2Byte = new byte[2];Check2Byte = CheckSum(CheckSumByte);OpenByte[7] = Check2Byte[0];OpenByte[8] = Check2Byte[1];return OpenByte;}public static string byteToHexStr(byte[] bytes){string returnStr = "";if (bytes != null){for (int i = 0; i < bytes.Length; i++){returnStr +=bytes[i].ToString("X2")+" ";}}return returnStr;}public static byte[] CheckSum(byte[] Byte){//做加法后转为16进制，取右边两位的ASCIIint Sum = 0;for (int i = 0; i < Byte.Length; i++){Sum = Sum + Byte[i];}string CheckSumString = Sum.ToString("X8");//大写X代表大写字母，小写代表小写，此处不同，需要注意。string Right2String = CheckSumString.Substring(CheckSumString.Length-2,2);byte[] CheckSumByte = new byte[2];ASCIIEncoding charToASCII = new ASCIIEncoding();CheckSumByte = charToASCII.GetBytes(Right2String.ToArray());return CheckSumByte;}public static byte[] ReadX(string X){//bool Flag = false;byte[] ReadByte = new byte[11];byte[] XAddressByte = GetX_ReadAddress(X);ReadByte[0] = 0x02;ReadByte[1] = 0x30;ReadByte[2] = XAddressByte[0];ReadByte[3] = XAddressByte[1];ReadByte[4] = XAddressByte[2];ReadByte[5] = XAddressByte[3];ReadByte[6] = 0x30;ReadByte[7] = 0x32;ReadByte[8] = 0x03;byte[] CheckSumByte = new byte[9];for (int i = 1; i < CheckSumByte.Length + 1; i++){CheckSumByte[i - 1] = ReadByte[i];}byte[] Check2Byte = new byte[2];Check2Byte = CheckSum(CheckSumByte);ReadByte[9] = Check2Byte[0];ReadByte[10] = Check2Byte[1];return ReadByte;}public static byte[] ReadS(string S){//bool Flag = false;byte[] ReadByte = new byte[11];byte[] SAddressByte = GetS_ReadAddress(S);ReadByte[0] = 0x02;ReadByte[1] = 0x30;ReadByte[2] = SAddressByte[0];ReadByte[3] = SAddressByte[1];ReadByte[4] = SAddressByte[2];ReadByte[5] = SAddressByte[3];ReadByte[6] = 0x30;ReadByte[7] = 0x32;ReadByte[8] = 0x03;byte[] CheckSumByte = new byte[9];for (int i = 1; i < CheckSumByte.Length + 1; i++){CheckSumByte[i - 1] = ReadByte[i];}byte[] Check2Byte = new byte[2];Check2Byte = CheckSum(CheckSumByte);ReadByte[9] = Check2Byte[0];ReadByte[10] = Check2Byte[1];return ReadByte;}public static void OpenMitsubishiPLC(SerialPort serialPort,string COM){try{serialPort.PortName = COM;serialPort.BaudRate = Convert.ToInt32(9600);serialPort.Parity = Parity.Even;serialPort.DataBits = Convert.ToInt32(7);serialPort.StopBits = StopBits.One;serialPort.Handshake = Handshake.None;serialPort.WriteTimeout = 500;serialPort.ReadTimeout = 500;if (serialPort.IsOpen == false){serialPort.Open();}}catch (Exception){throw;}}public static byte[] GetXAddress(string X){string XAddress = "";switch (X){case "X0":XAddress = "0004";break;case "X1":XAddress = "0104";break;case "X2":XAddress = "0204";break;case "X3":XAddress = "0304";break;case "X4":XAddress = "0404";break;case "X5":XAddress = "0504";break;case "X6":XAddress = "0604";break;case "X7":XAddress = "0704";break;}byte[] YAddressByte = new byte[4];ASCIIEncoding charToASCII = new ASCIIEncoding();YAddressByte = charToASCII.GetBytes(XAddress.ToArray());return YAddressByte;}public static byte[] GetYAddress(string Y){string YAddress="";switch (Y){case "Y0"://05 00YAddress = "0005";break;case "Y1"://05 01YAddress = "0105";break;case "Y2"://05 02YAddress = "0205";break;case "Y3"://05 03YAddress = "0305";break;case "Y4"://05 04YAddress = "0405";break;case "Y5"://05 05YAddress = "0505";break;case "Y6"://05 06YAddress = "0605";break;case "Y7"://05 07YAddress = "0705";break;case "Y10"://05 00YAddress = "0805";break;case "Y11"://05 01YAddress = "0905";break;case "Y12"://05 02YAddress = "0A05";break;case "Y13"://05 03YAddress = "0B05";break;case "Y14"://05 04YAddress = "0C05";break;case "Y15"://05 05YAddress = "0D05";break;case "Y16"://05 06YAddress = "0E05";break;case "Y17"://05 07YAddress = "0F05";break;}byte[] YAddressByte = new byte[4]; ASCIIEncoding charToASCII = new ASCIIEncoding();YAddressByte = charToASCII.GetBytes(YAddress.ToArray());return YAddressByte;}public static byte[] GetSAddress(string S){string SAddress = "";switch (S){case "S0":SAddress = "0000";break;case "S1":SAddress = "0100";break;case "S2":SAddress = "0200";break;case "S3":SAddress = "0300";break;case "S4":SAddress = "0400";break;case "S5":SAddress = "0500";break;case "S6":SAddress = "0600";break;case "S7":SAddress = "0700";break;case "S8":SAddress = "0800";break;case "S9":SAddress = "0900";break;case "S10":SAddress = "0A00";break;case "S11":SAddress = "0B00";break;case "S12":SAddress = "0C00";break;case "S13":SAddress = "0D00";break;case "S14":SAddress = "0E00";break;case "S15":SAddress = "0F00";break;}byte[] YAddressByte = new byte[4];ASCIIEncoding charToASCII = new ASCIIEncoding();YAddressByte = charToASCII.GetBytes(SAddress.ToArray());return YAddressByte;}public static byte[] GetX_ReadAddress(string X)//For Read{// X0-X7读取的地址相同，将得到的数字转为2进制判断通断。string XAddress = "";switch (X){case "X0":XAddress = "0080";break;case "X1":XAddress = "0080";break;case "X2":XAddress = "0080";break;case "X3":XAddress = "0080";break;case "X4":XAddress = "0080";break;case "X5":XAddress = "0080";break;case "X6":XAddress = "0080";break;case "X7":XAddress = "0080";break;case "X10":XAddress = "0081";break;case "X11":XAddress = "0081";break;case "X12":XAddress = "0081";break;case "X13":XAddress = "0081";break;case "X14":XAddress = "0081";break;case "X15":XAddress = "0081";break;case "X16":XAddress = "0081";break;case "X17":XAddress = "0081";break;}byte[] YAddressByte = new byte[4];ASCIIEncoding charToASCII = new ASCIIEncoding();YAddressByte = charToASCII.GetBytes(XAddress.ToArray());return YAddressByte;}public static byte[] GetS_ReadAddress(string S)//For Read{// X0-X7读取的地址相同，将得到的数字转为2进制判断通断。string SAddress = "";switch (S){case "S0":SAddress = "0000";break;case "S1":SAddress = "0000";break;case "S2":SAddress = "0000";break;case "S3":SAddress = "0000";break;case "S4":SAddress = "0000";break;case "S5":SAddress = "0000";break;case "S6":SAddress = "0000";break;case "S7":SAddress = "0000";break;case "S8":SAddress = "0001";break;case "S9":SAddress = "0001";break;case "S10":SAddress = "0001";break;case "S11":SAddress = "0001";break;case "S12":SAddress = "0001";break;case "S13":SAddress = "0001";break;case "S14":SAddress = "0001";break;case "S15":SAddress = "0001";break;}byte[] YAddressByte = new byte[4];ASCIIEncoding charToASCII = new ASCIIEncoding();YAddressByte = charToASCII.GetBytes(SAddress.ToArray());return YAddressByte;}}}
