| 摘要 |
PURPOSE:To transmit emergency data with higher priority in case a state change occurs within a station by integrating the related items and sending them through a communication procedure. CONSTITUTION:A reception part 30 receives a frame from an upstream circuit and checks whether the frame is addressed to its own station or not. If the frame is not addressed to its own station, the frame is sent to a transmission part 31 and then to a downstream side. While the frame if addressed to its own station is sent to a processing part 32, and the data on this frame is fetched in a data reception mode. While the desired data is transmitted in a transmission mode. Then the part 32 performs the input/output processing when data is transferred with an external device 10. Furthermore it is checked whether the input data has a state change or not. If the data has a state change, it is set to a state-change data table prepared within the station. Based on this table, the editing process is carried out. Then the data is set to a transmission data table and sent to the downstream side. |
