DATA MERGING METHOD AND DISTRIBUTED CONTROL SYSTEM

摘要

PROBLEM TO BE SOLVED: To use the same identifier name between controllers by making flexible identifier management for merging the data of respective distributed controllers to a supervisory device. SOLUTION: A supervisory device 100 is connected with plural controllers and data managed by the identifiers (TAG) of respective controllers are merged on a memory 101 of the supervisory device. Therefore, on the basis of a previously defined identifier and mapping of the identifier and a node, a merged data managing part 108 generates an identifier managing table 102 by excluding overlapping of identifiers and converting them to the identifier of a unique name and maps the merged data area of the memory 101 while using this converted identifier. Further, identifier managing tables 112, 122 and 132 are generated and transmitted to the respective controllers. The supervisory device 100 requests transmitting/receiving of data to the respective controllers and merges data. The application of each of controllers accesses the merged data while using the identifier of the received identifier managing table.