static string BuildErrorMessage(MessageType messageType, HeaderErrorClass errorClass, byte errorCode)
{
var sb = new StringBuilder("An error was returned during communication:").AppendLine().AppendLine();
sb.Append("\tMessage type: ").Append(messageType).Append(" / 0x").AppendFormat("{0:X}", messageType).AppendLine();
sb.Append("\tError class: ");
if (Enum.IsDefined(typeof(HeaderErrorClass), errorClass))
{
sb.Append(errorClass).Append(" / ");
}
sb.Append("0x").AppendFormat("{0:X}", errorClass).AppendLine();
sb.Append("\tError code: 0x").AppendFormat("{0:X}", errorCode).AppendLine();
var combinedErrorCode = (ParameterErrorCode)(((int)errorClass << 8) | errorCode);
sb.Append("\tCombined error: ");
if (Enum.IsDefined(typeof(ParameterErrorCode), combinedErrorCode))
{
sb.Append(combinedErrorCode).Append(" / ");
}
sb.Append("0x").AppendFormat("{0:X}", combinedErrorCode).AppendLine();
return(sb.ToString());
}
internal static void ThrowCommunicationFailure(MessageType messageType, HeaderErrorClass errorClass, byte errorCode)
{
throw new S7ProtocolException(BuildErrorMessage(messageType, errorClass, errorCode));
