/// <summary>
/// Выполнить запрос в режиме TCP
/// </summary>
public bool TcpRequest(DataUnit dataUnit)
{
if (!CheckConnection())
{
return(false);
}
bool result = false;
// отправка запроса
WriteToLog(dataUnit.ReqDescr);
Connection.Write(dataUnit.ReqADU, 0, dataUnit.ReqADU.Length,
CommUtils.ProtocolLogFormats.Hex, out string logText);
ExecWriteToLog(logText);
// приём ответа
// считывание MBAP Header
int readCnt = Connection.Read(InBuf, 0, 7, Timeout, CommUtils.ProtocolLogFormats.Hex, out logText);
ExecWriteToLog(logText);
if (readCnt == 7)
{
int pduLen = InBuf[4] * 256 + InBuf[5] - 1;
if (InBuf[0] == 0 && InBuf[1] == 0 && InBuf[2] == 0 && InBuf[3] == 0 && pduLen > 0 &&
InBuf[6] == dataUnit.ReqADU[6])
{
// считывание PDU
readCnt = Connection.Read(InBuf, 7, pduLen, Timeout,
CommUtils.ProtocolLogFormats.Hex, out logText);
ExecWriteToLog(logText);
if (readCnt == pduLen)
{
// расшифровка ответа
string errMsg;
if (dataUnit.DecodeRespPDU(InBuf, 7, pduLen, out errMsg))
{
ExecWriteToLog(ModbusPhrases.OK);
result = true;
}
else
{
ExecWriteToLog(errMsg + "!");
}
}
else
{
WriteToLog(ModbusPhrases.CommErrorWithExclamation);
}
}
else
{
WriteToLog(ModbusPhrases.IncorrectMbap);
}
}
else
{
WriteToLog(ModbusPhrases.CommErrorWithExclamation);
}
return(result);
}
/// <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>
/// Выполнить запрос в режиме RTU
/// </summary>
public bool RtuRequest(DataUnit dataUnit)
{
if (!CheckConnection())
{
return(false);
}
bool result = false;
// отправка запроса
ExecWriteToLog(dataUnit.ReqDescr);
Connection.Write(dataUnit.ReqADU, 0, dataUnit.ReqADU.Length,
CommUtils.ProtocolLogFormats.Hex, out string logText);
ExecWriteToLog(logText);
// приём ответа
// считывание начала ответа для определения длины PDU
int readCnt = Connection.Read(InBuf, 0, 5, Timeout, CommUtils.ProtocolLogFormats.Hex, out logText);
ExecWriteToLog(logText);
if (readCnt == 5)
{
int pduLen;
int count;
if (InBuf[0] != dataUnit.ReqADU[0]) // проверка адреса устройства в ответе
{
ExecWriteToLog(ModbusPhrases.IncorrectDevAddr);
}
else if (!(InBuf[1] == dataUnit.FuncCode || InBuf[1] == dataUnit.ExcFuncCode))
{
ExecWriteToLog(ModbusPhrases.IncorrectPduFuncCode);
}
else
{
if (InBuf[1] == dataUnit.FuncCode)
{
// считывание окончания ответа
pduLen = dataUnit.RespPduLen;
count = dataUnit.RespAduLen - 5;
readCnt = Connection.Read(InBuf, 5, count, Timeout,
CommUtils.ProtocolLogFormats.Hex, out logText);
ExecWriteToLog(logText);
}
else // устройство вернуло исключение
{
pduLen = 2;
count = 0;
readCnt = 0;
}
if (readCnt == count)
{
if (InBuf[pduLen + 1] + InBuf[pduLen + 2] * 256 == ModbusUtils.CalcCRC16(InBuf, 0, pduLen + 1))
{
// расшифровка ответа
string errMsg;
if (dataUnit.DecodeRespPDU(InBuf, 1, pduLen, out errMsg))
{
ExecWriteToLog(ModbusPhrases.OK);
result = true;
}
else
{
ExecWriteToLog(errMsg + "!");
}
}
else
{
ExecWriteToLog(ModbusPhrases.CrcError);
}
}
else
{
ExecWriteToLog(ModbusPhrases.CommErrorWithExclamation);
}
}
}
else
{
ExecWriteToLog(ModbusPhrases.CommErrorWithExclamation);
}
return(result);
}
/// <summary>
/// Run a TCP request
/// </summary>
public bool TcpRequest(DataUnit dataUnit)
{
if (!CheckConnection())
{
return(false);
}
var result = false;
// sending request
WriteToLog(dataUnit.ReqDescr);
Connection.Write(dataUnit.ReqADU, 0, dataUnit.ReqADU.Length,
CommUtils.ProtocolLogFormats.Hex, out string logText);
ExecWriteToLog(logText);
// reception of the answer
// read MBAP Header
int readCnt = Connection.Read(InBuf, 0, 7, Timeout, CommUtils.ProtocolLogFormats.Hex, out logText);
ExecWriteToLog(logText);
if (readCnt == 7)
{
int pduLen = InBuf[4] * 256 + InBuf[5] - 1;
if (InBuf[0] == 0 && InBuf[1] == 0 && InBuf[2] == 0 && InBuf[3] == 0 && pduLen > 0 &&
InBuf[6] == dataUnit.ReqADU[6])
{
// PDU reading
readCnt = Connection.Read(InBuf, 7, pduLen, Timeout,
CommUtils.ProtocolLogFormats.Hex, out logText);
ExecWriteToLog(logText);
if (readCnt == pduLen)
{
// answer decryption
string errMsg;
if (dataUnit.DecodeRespPDU(InBuf, 7, pduLen, out errMsg))
{
ExecWriteToLog(ModbusPhrases.OK);
result = true;
}
else
{
ExecWriteToLog(errMsg + "!");
}
}
else
{
WriteToLog(ModbusPhrases.CommErrorWithExclamation);
}
}
else
{
WriteToLog(ModbusPhrases.IncorrectMbap);
}
}
else
{
WriteToLog(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);
}
/// <summary>
/// Run RTU query
/// </summary>
public bool RtuRequest(DataUnit dataUnit)
{
if (!CheckConnection())
{
return(false);
}
var result = false;
// sending request
ExecWriteToLog(dataUnit.ReqDescr);
Connection.Write(dataUnit.ReqADU, 0, dataUnit.ReqADU.Length,
CommUtils.ProtocolLogFormats.Hex, out string logText);
ExecWriteToLog(logText);
// reception of the answer
// reading the start of the response to determine the length of the PDU
int readCnt = Connection.Read(InBuf, 0, 5, Timeout, CommUtils.ProtocolLogFormats.Hex, out logText);
ExecWriteToLog(logText);
if (readCnt == 5)
{
int pduLen;
int count;
if (InBuf[0] != dataUnit.ReqADU[0]) // checking device address in response
{
ExecWriteToLog(ModbusPhrases.IncorrectDevAddr);
}
else if (!(InBuf[1] == dataUnit.FuncCode || InBuf[1] == dataUnit.ExcFuncCode))
{
ExecWriteToLog(ModbusPhrases.IncorrectPduFuncCode);
}
else
{
if (InBuf[1] == dataUnit.FuncCode)
{
// read end of response
pduLen = dataUnit.RespPduLen;
count = dataUnit.RespAduLen - 5;
readCnt = Connection.Read(InBuf, 5, count, Timeout,
CommUtils.ProtocolLogFormats.Hex, out logText);
ExecWriteToLog(logText);
}
else // device returned exception
{
pduLen = 2;
count = 0;
readCnt = 0;
}
if (readCnt == count)
{
if (InBuf[pduLen + 1] + InBuf[pduLen + 2] * 256 ==
ModbusUtils.CalcCRC16(InBuf, 0, pduLen + 1))
{
// answer decryption
string errMsg;
if (dataUnit.DecodeRespPDU(InBuf, 1, pduLen, out errMsg))
{
ExecWriteToLog(ModbusPhrases.OK);
result = true;
}
else
{
ExecWriteToLog(errMsg + "!");
}
}
else
{
ExecWriteToLog(ModbusPhrases.CrcError);
}
}
else
{
ExecWriteToLog(ModbusPhrases.CommErrorWithExclamation);
}
}
}
else
{
ExecWriteToLog(ModbusPhrases.CommErrorWithExclamation);
}
return(result);
}