Buffer size

During the sending process or the receiving process, a long TCP frame (length > QRC_BUFFER_SIZE) will be divided into more segments. After each receiving process the function block FB_Connect will check received frame whether it is an independent QRC frame, or it is one segment of a long QRC frame. The function block will keep receiving until all segments are arrived or a receiving timeout occurs.

The size of the receiving buffer is 255 byte*QRC_NUMBER_OF_CONTROL. If the buffer gets overflowed, an error will occur and further error details can be found in the "Error List" window.