| 摘要 |
PURPOSE:To shorten total polling time of a master station by installing a memory device a polling slave station decision part and a polling controller and so on and making it possible to control repolling suitable for the current state of a telemeter system. CONSTITUTION:A memory device 9 of a master station 1 temporarily stores erroneous transmission input signals or non-response monitoring signals from a slave station. A polling slave decision part 8 sends a generation demanding signal to a random number generator 11, determines an inherent number of the slave station to be polled according to a generated random number and stores the number in the memory device 9. When the decision part 8 judges that in current polling the number of slave stations, which execute erroneous transmission or will not respond by the master station or by slave stations under a repeating station, exceeds the prescribed number of stations, the decision part 8 stores the stations as slave stations of non-response and polled in the device 9, and determines again the slave station to be polled. |
