Design of distributed real time systems in process control applications

Abstract

In order to handle the complexity of software for automation systems of larger scale in manufacturing nowadays procedural-oriented (e.g. SCR, RTSA) and object-oriented methods (OOD, OOA, OMT) are used. Within the latter alternative we developed an object-and service-oriented approach to cope with problems of complexity and to ease and accelerate the software design process. In this paper we present our service-based concept, give a possible definition of basic services and discuss experiences made in an application example of a production cell.

<title>Interactive creation of plant monitors and controls</title>

“…Services provide re-usable standardized building blocks which can be created, configured, controlled and interconnected in order to construct the application, based on a service-oriented design scheme. 13 Since most automation applications are a mixture of data acquisition, control, data storage and man-machine interaction, this paper describes an approach to combine already existing services to simplify the construction of plant monitors and controls. First, the necessary services are introduced and second, the idea of a graphical configuration is presented.…”

Design of PROFINET I/O Real-time Communication System between PLC Based on S7-1200

“…The PROFINET meets these requirements. Thus, the PROFINET can be used as a definite real-time communication system, to provide optimized communication channels for real-time communication, and ensure that communication using other standard protocols can be fault-free in the same network [3][4][5].…”