| 摘要 |
PURPOSE:To specify an error section at a highway monitor node in a data highway system, by allowing each station node to add check data to a check byte when sending out a frame. CONSTITUTION:Every time a frame arrives from a transmission line, a check is performed by using a frame check byte FCK. If an error is detected, error information is written. Then, the next frame is received and when no data is written at the node response part NRES of a frame header FHD, the node address NAD of a node detecting the error is written and the resulting frame is sent out to the transmission line. Further, the frame check byte FCK is sent out to the transmission line together with added check data. At the highway monitor node, the error section is specified by error information and the node address. |
