20211229, s7 disconnect status

snap7_communication/snap7_communication_base.cpp

@@ -284,7 +284,12 @@ Error_manager Snap7_communication_base::read_data_buf(Snap7_buf& snap7_buf)
 //		std::this_thread::sleep_for(std::chrono::milliseconds(10));
 		if ( result == 0 )
 		{
-			m_snap7_client.WaitAsCompletion(100);
+			result = m_snap7_client.WaitAsCompletion(100);
+			if ( result !=0 )
+			{
+				return Error_manager(Error_code::SNAP7_READ_ERROR, Error_level::MINOR_ERROR,
+									 " Snap7_communication_base::read_data_buf error ");
+			}
 			//倒序数据 转为 正序数据
 			snap7_buf.reverse_to_obverse();
 		}
@@ -319,7 +324,12 @@ Error_manager Snap7_communication_base::write_data_buf(Snap7_buf& snap7_buf)
 //		std::this_thread::sleep_for(std::chrono::milliseconds(10));
 		if ( result == 0 )
 		{
-			m_snap7_client.WaitAsCompletion(100);
+			result = m_snap7_client.WaitAsCompletion(100);
+			if ( result !=0 )
+			{
+				return Error_manager(Error_code::SNAP7_WRITE_ERROR, Error_level::MINOR_ERROR,
+									 " Snap7_communication_base::write_data_buf error ");
+			}
 		}
 		else
 		{