| 摘要 |
PURPOSE:To speed up the control, by stopping the monitor polling and transmitting control instruction, when control instruction is transmitted to a slave station, in a system fetching the monitor information from the slave station to a master station with the monitor polling sequentially. CONSTITUTION:A master station 4 transmits a polling signal to slave stations 1, 2, n sequentially and collects monitor data. When a slave station 2 is at polling, if it is required to control a load 5 of a slave station 1, control data is transmitted to the slave station 1 immediately after the end of polling of the slave station 2 to control the load 5. When the transmission of the control data is finished, polling is restarted again sequentially. Thus, the control can be quickened in comparison with system that the control data is not transmitted until the sequential polling is all finished. |
