CONFIGURATION DATABASE SYSTEM, DISTRIBUTED CONFIGURATION DATABASE SYSTEM, METHOD FOR STORING AND USING CONFIGURATION DATA, DATABASE SERVER, METHOD FOR PROVIDING ACCESS TO DATABASE COMPONENT, METHOD FOR USING DATABASE SERVER FOR PROVIDING PARALLEL ACCESS TO COMPONENT STORED IN DATA BASE, AND PROCESS CONTROL SYSTEM

摘要

PPROBLEM TO BE SOLVED: To enable users at each of the different locations to change the configuration database in a timely, secure and non-conflicting manner. PSOLUTION: A configuration database includes multiple databases distributed in a plurality of physical locations within a process control system, and each database stores a subset of configuration data. The subset can be accessed from a user in an arbitrary site in the system. In order to prevent the configuration data viewed by a subscriber in the system from becoming old, the database server automatically detects change to each item in the database, and transmits notification of the change to each of the subscribers. PCOPYRIGHT: (C)2011,JPO&INPIT