| 摘要 |
PURPOSE:To shorten the latency time of a slave station by uniting slave stations in blocks and by including an address for assigning a block in a polling signal when the master station is to poll. CONSTITUTION:The system consists of master station MS1 and slave stations 1-1- N-R. Respective slave stations are grouped in blocks B1, B2...BN. Master station MS1, when collects data from slave stations by polling, sends a polling signal to offer services to blocks B1-BN successively. Only when a block including a slave station with data is offersed services, respective slave stations in this block are serviced successively. Therefore, services are offered block by block according to block assignment addresses, so that many slave stations can be offered services with efficiency. |
