| 摘要 |
PURPOSE:To reduce the loss rate of data in a loop network by detecting state dissidence between an answer arriving at a transmitting station coincide and the reception result of a receiving station. CONSTITUTION:A loop transmission and reception part 2 controls frame transmission and reception through a loop transmission line 4 to write received frames in an auxiliary memory 5, and its reception result is set after the received frame and returned to the transmitting station. When the states coincide with each other at a frame processing part 3, the transmission side performs control so that the remote station receives a frame with an order number which should not be transmitted and the reception side, on the other hand, such a frame is received to detect the occurrence of the state dissidence. |
