/// <summary>
/// Build an exception message
/// </summary>
/// <param name="send_buffer">Send buffer</param>
/// <param name="code">Modbus operation code</param>
/// <param name="error">Error code</param>
void BuildExceptionMessage(List <byte> send_buffer, ModbusCodes code, Errors error)
{
byte exception_code = 0;
send_buffer.Clear();
switch (error)
{
case Errors.EXCEPTION_ILLEGAL_FUNCTION:
exception_code = 1;
break;
case Errors.EXCEPTION_ILLEGAL_DATA_ADDRESS:
exception_code = 2;
break;
case Errors.EXCEPTION_ILLEGAL_DATA_VALUE:
exception_code = 3;
break;
case Errors.EXCEPTION_SLAVE_DEVICE_FAILURE:
exception_code = 4;
break;
}
// Add exception identifier
send_buffer.Add((byte)(0x80 + (byte)code));
// Add exception code
send_buffer.Add(exception_code);
}
/// <summary>
/// Build an exception message
/// </summary>
/// <param name="send_buffer">Send buffer</param>
/// <param name="code">Modbus operation code</param>
/// <param name="error">Error code</param>
void BuildExceptionMessage(List<byte> send_buffer, ModbusCodes code, Errors error)
{
byte exception_code = 0;
send_buffer.Clear();
switch (error)
{
case Errors.EXCEPTION_ILLEGAL_FUNCTION:
exception_code = 1;
break;
case Errors.EXCEPTION_ILLEGAL_DATA_ADDRESS:
exception_code = 2;
break;
case Errors.EXCEPTION_ILLEGAL_DATA_VALUE:
exception_code = 3;
break;
case Errors.EXCEPTION_SLAVE_DEVICE_FAILURE:
exception_code = 4;
break;
}
// Add exception identifier
send_buffer.Add((byte)(0x80 + (byte)code));
// Add exception code
send_buffer.Add(exception_code);
}