Abstract
IEC 61131 has been widely accepted in the industrial automation domain. However, it is claimed that the standard does not address today the new requirements of complex industrial systems, which include among others, portability, interoperability, increased reusability and distribution. To address these restrictions, IEC has initiated the task of developing IEC 61499, which is presented as a mature technology to enable intelligent automation in various domains. This standard was not accepted by industry even though it is highly promoted by the academic community. In this paper, a comparison between the two standards is presented. We argue that IEC 61499 has been promoted by academy based on unsubstantiated claims on its main features, i.e., reusability, portability, interoperability, event-driven execution. A number of misperceptions are presented and discussed. Based on this, it is claimed that IEC 61499 does not provide a solid framework for the next generation of industrial automation systems.
Highlights
Industrial automation systems have been based for many years on the IEC 61131 standard [1], which was first published in 1992
This paper focuses on the arguments used in the IEC 61499 related literature and presents a number of misperceptions that are used in its comparison with IEC 61131
From the above it is clear that the execution model proposed by the Compliance Profile is based on the key concepts of the execution model of the IEC 61131 Function Block Diagram (FBD)
Summary
Industrial automation systems have been based for many years on the IEC 61131 standard [1], which was first published in 1992. The standard has been criticized the past few years for not addressing any more the requirements of today’s complex industrial automation systems and not being compliant with state of the art software engineering practices. It is claimed in [9] that current software architectures of industrial process measurement and control systems (IPMCS), such as IEC 61131-3, do not conceptually support reconfiguration and distribution. It is claimed that IEC 61499 does not provide a solid background to switch from the widely accepted IEC 61131, since 61499 introduces more problems in the development process of industrial automation systems than the ones it promises to address. Three misperceptions related with the event driven model of IEC 61499 are discussed in Section 6 and the paper is concluded in the last section
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