CONTROL SYSTEM AND NODE ADDRESS SETTING METHOD FOR CONTROL SYSTEM

摘要

A control system having processing units for outputting control commands; a plurality of I/O devices for receiving the control commands and outputting the control commands to a controlled system; and duplicate intermediary units which relay the control commands from the processing units to the I/O devices, wherein each of the duplicate intermediary units includes an upper address setting device which generates upper address data and outputs the upper address data to the I/O devices; and each of the I/O devices includes an upper address comparator for comparing the received upper address data, an upper address setting unit for selecting upper address data on the basis of the result of comparison, and a line control unit for forming a node address for a particular I/O device by merging selected upper address data and lower address data determined by the particular I/O device.