DATA COMMUNICATION SYSTEM FOR DECENTRALIZED CONTROLLER

摘要

PURPOSE:To perform the processing of reception by taking precedence over a preceded receipt even in case the requests for coincidence of data are given concentrically from plural stations, by having a common task number through all controllers. CONSTITUTION:A communication controller FCA functioning as an interface to a communication line, a processor CPU, a main memory MMU and an input/ output device I/O are connected to each other via a data bus BS. The controller FCA has its own intelligence consisting of a microprocessor or a proper firmware in order to perform an autonomous control of communication. At the same time, the controller FCA has a direct memory access (DMA) function to the memory MMU to perform direct reading/writing of data communicated to other stations to the memory MMU.