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The IEC 61499 gives developers considerable freedom and offers several features that support reuse. Although this can help the adoption of the standard into an organization's development process, the range of design decisions can also harm the reusability of software, if components are developed with incompatible design principles. Guidelines are needed, but the unique backgrounds and market positions...
Information system security for industrial plants is a topic of increasing importance. Effective and cost-efficient security solutions require some kind of industry consensus or standardization. This paper examines the interests of the various stakeholders in the industrial security field (e.g. society, plant owners, service providers, automation vendors, and consultants) and evaluates some of the...
We introduce a new methodology for the specification and the design of the control logic of automated manufacturing systems. Our aim is to make specification express just what is necessary earlier in the design process. This permits to produce an optimized work cycle for the system and makes both production recovery calculation and code generation easier. The methodology is based on a modular modeling...
In distributed industrial control systems, functions of control units differ slightly although they seem to be identical. Functions change when hardware is replaced or when the function itself is upgraded. If the standard system is generated by merging the differences and is installed then to each control unit, control units become different with maintenance being carried out in each control unit...
Nowadays, the development of flexible and interoperable software platforms for industry is an important issue. The CCM model captures two paramount features of such platforms, as it combines component-based middleware (easy composition of new applications and maintainability) and the openness of the CORBA standard. Though there exist an implementation of CCM devoted to real-time systems (CIAO platform),...
Industrial automation is currently on the cusp to the application of distributed systems based on distributed intelligence enabling distributed decision making within control. As one main technology within this field IEC 61499 based function block systems would be applied. But the usage of function block systems may cause problems which have to be avoided prior to the integration of a function block...
This paper proposes a middleware architecture that serves as a framework for the management of industrial processes in an industrial grid environment. The proposed system is based on agents making possible the effective distribution of intelligence, thus fortifying the survivability of the industrial network, while a central point of monitoring and control allows agent monitoring. By the term `agent'...
The IEC 61499 (function block) standard proposes an open architecture for distributed industrial-process measurement and control systems (IPMCS). The IEC 61499 defines the basic concepts and methodology for the design of modular reusable distributable systems, and paves the way for the new reconfigurable and flexible manufacturing. This paper presents the development of a software tool (IEC 61499...
The goal of the presented research is to face the topic of reconfigurable control software development in a concrete fashion, i.e., by presenting a control software system development approach which has been used for a specific, although easy to be generalized, robotized manufacturing cell component. In particular, a methodology for the control software development of a planar robot (2-degrees of...
The paper presents a modular control model to develop the control functions for manufacturing systems and its implementation using IEC 61499 function blocks. In particular, a new control module for automation objects is formally specified and its use on a hierarchical functional architecture has been discussed and the possible distribution of its IEC 61499 implementation is investigated. Finally,...
Remote control involves several issues that degrade seriously the performance of the plant to be controlled. This paper presents a strategy improving the characteristics of the remote control system, using an online adaptive neural net, in order to learn the variations of the remote system parameters to minimize the errors. This strategy is successfully applied to a client-server remote control system...
This paper presents an implementation approach of artificial neural networks in industrial network environment, through the use of function blocks standardized by field-bus foundation (FF). This enables the implementation of a wide range of applications that involve this mathematical tool, such as intelligent control, failure detection, etc in standard FF system. For validation propose, some examples...
Industrial control systems architectures have been evolving to the decentralization of control tasks. This evolution associated with the time-critical nature of these tasks, increases the dependability requirements for one of their most critical components: the communication system. Therefore, this is an important aspect on the control system design which must be properly evaluated. In this paper...
One of the most important factors in building high-performance, scalable industrial control applications is the ability to transfer process data from the server to the client machine in the most efficient and fast way. OPC DA is widely accepted and used as the standard in automation and network control systems. We present a system and method for caching process data in large industrial control systems...
This paper presents a design scheme for an intelligent fieldbus master with Ethernet interface based on Profibus. Significance of the design scheme was discussed, as there are many different kinds of fieldbuses coexisting. Architecture of Profibus protocol and its state machine was investigated. According to the state machine, an integrated communication process of the master was analyzed, and a design...
The paper presents an approach to obtain a closed-loop model of controlled manufacturing systems. The major obstacle in applying such models to formal verification of real systems is the effort that is needed to design a formal model of the plant behavior. We show in this contribution how a semi-formal description of the plant, called pneumatic equipment plan, can be used to reduce the effort to design...
A static control system architecture cannot meet the demand for continually introducing new parts into manufacturing systems while maintaining high quality and throughput for existing parts; a reconfigurable control infrastructure is needed. Control authority in the factory is typically allocated to three levels: the machine, cell, and system. The machine controllers must be reconfigurable to process...
A generic heuristic algorithm is introduced for the derivation of "common" PI controllers that is PI controllers that achieve specific performance requirements simultaneously for all members of a set of linear models, called the target set. Common PI controllers find application for the control of processes with multi-linear description, since they can achieve safe and satisfactory performance...
The paper proposes a dependability model which enables the evaluation of Profibus-DP networks in scenarios of transient faults which affect data communications. The full behavior of Profibus-DP communication stack is modeled, including: cyclic process data exchange between master and slave stations; configuration, parameterization and diagnostics of slave stations. The model is based on a high level...
The acceptance of formal methods in industry is a challenging task mainly due to difficult learning process and the lack of the tools and methods helping control engineer to interpret the results of formal verification procedure. We model existing source code of the controller and controller related information (controller model) along with controlled object (plant model) and verify modeled system...
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