/// <summary> /// Инициализировать ADU запроса и рассчитать длину ответа /// </summary> public virtual void InitReqADU(byte devAddr, TransModes transMode) { if (ReqPDU != null) { int pduLen = ReqPDU.Length; switch (transMode) { case TransModes.RTU: ReqADU = new byte[pduLen + 3]; ReqADU[0] = devAddr; ReqPDU.CopyTo(ReqADU, 1); ushort crc = ModbusUtils.CalcCRC16(ReqADU, 0, pduLen + 1); ReqADU[pduLen + 1] = (byte)(crc % 256); ReqADU[pduLen + 2] = (byte)(crc / 256); RespAduLen = RespPduLen + 3; break; case TransModes.ASCII: byte[] aduBuf = new byte[pduLen + 2]; aduBuf[0] = devAddr; ReqPDU.CopyTo(aduBuf, 1); aduBuf[pduLen + 1] = ModbusUtils.CalcLRC(aduBuf, 0, pduLen + 1); StringBuilder sbADU = new StringBuilder(); foreach (byte b in aduBuf) { sbADU.Append(b.ToString("X2")); } ReqADU = Encoding.Default.GetBytes(sbADU.ToString()); ReqStr = ModbusUtils.Colon + sbADU; RespAduLen = RespPduLen + 2; break; default: // TransModes.TCP ReqADU = new byte[pduLen + 7]; ReqADU[0] = 0; ReqADU[1] = 0; ReqADU[2] = 0; ReqADU[3] = 0; ReqADU[4] = (byte)((pduLen + 1) / 256); ReqADU[5] = (byte)((pduLen + 1) % 256); ReqADU[6] = devAddr; ReqPDU.CopyTo(ReqADU, 7); RespAduLen = RespPduLen + 7; break; } } }
/// <summary> /// Выполнить запрос в режиме ASCII /// </summary> public bool AsciiRequest(DataUnit dataUnit) { if (!CheckConnection()) { return(false); } bool result = false; // отправка запроса ExecWriteToLog(dataUnit.ReqDescr); Connection.WriteLine(dataUnit.ReqStr, out string logText); ExecWriteToLog(logText); // приём ответа string line = Connection.ReadLine(Timeout, out logText); ExecWriteToLog(logText); int lineLen = line == null ? 0 : line.Length; if (lineLen >= 3) { int aduLen = (lineLen - 1) / 2; if (aduLen == dataUnit.RespAduLen && lineLen % 2 == 1) { // получение ADU ответа byte[] aduBuf = new byte[aduLen]; bool parseOK = true; for (int i = 0, j = 1; i < aduLen && parseOK; i++, j += 2) { try { aduBuf[i] = byte.Parse(line.Substring(j, 2), NumberStyles.HexNumber); } catch { ExecWriteToLog(ModbusPhrases.IncorrectSymbol); parseOK = false; } } if (parseOK) { if (aduBuf[aduLen - 1] == ModbusUtils.CalcLRC(aduBuf, 0, aduLen - 1)) { // расшифровка ответа string errMsg; if (dataUnit.DecodeRespPDU(aduBuf, 1, aduLen - 2, out errMsg)) { ExecWriteToLog(ModbusPhrases.OK); result = true; } else { ExecWriteToLog(errMsg + "!"); } } else { ExecWriteToLog(ModbusPhrases.LrcError); } } } else { ExecWriteToLog(ModbusPhrases.IncorrectAduLength); } } else { ExecWriteToLog(ModbusPhrases.CommErrorWithExclamation); } return(result); }
/// <summary> /// Run ASCII query /// </summary> public bool AsciiRequest(DataUnit dataUnit) { if (!CheckConnection()) { return(false); } var result = false; // sending request ExecWriteToLog(dataUnit.ReqDescr); Connection.WriteLine(dataUnit.ReqStr, out string logText); ExecWriteToLog(logText); // reception of the answer string line = Connection.ReadLine(Timeout, out logText); ExecWriteToLog(logText); int lineLen = line == null ? 0 : line.Length; if (lineLen >= 3) { int aduLen = (lineLen - 1) / 2; if (aduLen == dataUnit.RespAduLen && lineLen % 2 == 1) { // getting ADU response var aduBuf = new byte[aduLen]; var parseOK = true; for (int i = 0, j = 1; i < aduLen && parseOK; i++, j += 2) { try { aduBuf[i] = byte.Parse(line.Substring(j, 2), NumberStyles.HexNumber); } catch { ExecWriteToLog(ModbusPhrases.IncorrectSymbol); parseOK = false; } } if (parseOK) { if (aduBuf[aduLen - 1] == ModbusUtils.CalcLRC(aduBuf, 0, aduLen - 1)) { // answer decryption string errMsg; if (dataUnit.DecodeRespPDU(aduBuf, 1, aduLen - 2, out errMsg)) { ExecWriteToLog(ModbusPhrases.OK); result = true; } else { ExecWriteToLog(errMsg + "!"); } } else { ExecWriteToLog(ModbusPhrases.LrcError); } } } else { ExecWriteToLog(ModbusPhrases.IncorrectAduLength); } } else { ExecWriteToLog(ModbusPhrases.CommErrorWithExclamation); } return(result); }