public static ReadHoldingRegisters Create(byte slaveAddress, ushort startingAddress, ushort quantity)
{
ReadHoldingRegisters request = new ReadHoldingRegisters()
{
SlaveAddress = slaveAddress,
FunctionCode = 3,
StartingAddress = (ushort)(startingAddress),
QuantityOfRegisters = quantity,
Protocol = ProtocolType.RTU
};
byte[] rtuEncoded = request.Encode();
return(ReadHoldingRegisters.Decode(rtuEncoded));
}
public static ReadHoldingRegisters Create(byte unitId, ushort transactionId, ushort protocolId, ushort startingAddress, ushort quantity)
{
ReadHoldingRegisters request = new ReadHoldingRegisters()
{
Header = new MbapHeader()
{
ProtocolId = protocolId, TransactionId = transactionId, UnitId = unitId
},
SlaveAddress = unitId,
FunctionCode = 3,
StartingAddress = (ushort)(startingAddress),
QuantityOfRegisters = quantity,
Protocol = ProtocolType.TCP
};
byte[] encoded = request.Encode();
return(ReadHoldingRegisters.Decode(encoded));
}
public static ModbusMessage Create(MessageType type, byte unitId, ushort transactionId, ushort protocolId, byte slaveId, ushort startingAddress, ushort quantity)
{
int num = (int)type;
if (num == 1)
{
return(ReadCoils.Create(unitId, transactionId, protocolId, startingAddress, quantity));
}
if (num == 2)
{
return(ReadDiscreteInputs.Create(unitId, transactionId, protocolId, startingAddress, quantity));
}
if (num == 3)
{
return(ReadHoldingRegisters.Create(unitId, transactionId, protocolId, startingAddress, quantity));
}
if (num == 4)
{
return(ReadInputRegisters.Create(unitId, transactionId, protocolId, startingAddress, quantity));
}
throw new ModbusFunctionCodeMismatchException("Message type out of range, not 1-4.");
}
private static ModbusMessage GetDecodedMessage(byte code, byte[] message)
{
if (code == 1)
{
return(ReadCoils.Decode(message));
}
if (code == 2)
{
return(ReadDiscreteInputs.Decode(message));
}
if (code == 3)
{
return(ReadHoldingRegisters.Decode(message));
}
if (code == 4)
{
return(ReadInputRegisters.Decode(message));
}
if (code == 5)
{
return(WriteSingleCoil.Decode(message));
}
if (code == 6)
{
return(WriteSingleRegister.Decode(message));
}
if (code == 15)
{
return(WriteMultipleCoils.Decode(message));
}
if (code == 16)
{
return(WriteMultipleCoils.Decode(message));
}
throw new IndexOutOfRangeException("Function code out of range.");
}