Advantages of the QNX Operating System and its Network Systems in Distributed Object Installations of DCS MASTER System

Abstract

The paper presents the most important properties of the QNX system used in servicing the Distributed Control System (DCS) MASTER. Operating systems with a monolithic structure and microkernel systems are distinguished. The QNX system is a microkernel system. The QNX microkernel supports its system processes, as well as the DCS MASTER processes, with the ability to manage their execution on its own. In addition, various file systems are presented, including the power failure-proof QNX6 file system and reliable communication systems, both corporate and universal, based on QNET, TCP/IP and UDP/IP protocols. These systems enable access to distributed disk resources of the MASTER system stations and controllers. They provide tools to support large-size graphic displays and to implement local and remote diagnostic and servicing operations.