IEC61499 Execution Model Semantics

Thramboulidis, Kleanthis; Doukas, G.

doi:10.1007/978-1-4020-6266-7_41

Cited by 19 publications

(13 citation statements)

References 7 publications

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“…The term resource is also unclear in IEC 61499. Except from the fact that the use of the "IEC61499 resource" is restrictive and misleading, specific arguments for its use are not given [5]. In RTAI-AXE, for example, a resource is considered as a container of FB instances [21].…”

Section: Resourcementioning

confidence: 98%

Towards an Object-Oriented extension for IEC 61131

Thramboulidis

2012

Proceedings of 2012 IEEE 17th International Conference on Emerging Technologies &Amp; Factory Automation (ETFA 2012)

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The IEC 61131 has been successfully used for many years in the industrial automation domain. IEC 61499 was defined to better handle complexity and increase modularity and reusability in the development process, but it failed on its objective. The extension of the IEC 61131 that supports the Object Oriented paradigm is considered today as the most promising solution to address new requirements and lead to a more productive development process. In this paper, the upcoming version of the IEC 61131 and mainly its extension to the OO paradigm is analyzed with the intention to identify defects and propose solutions. The approach adopted in this extension is quite similar to the one of C++, i.e., a mixing of procedural and OO paradigms. This has advantages and dis-advantages for the developer.

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Section: Resourcementioning

confidence: 98%

Towards an Object-Oriented extension for IEC 61131

Thramboulidis

2012

Proceedings of 2012 IEEE 17th International Conference on Emerging Technologies &Amp; Factory Automation (ETFA 2012)

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“…The function blocks has modularity. It has only ambiguous semantics, but the problem was addressed by several researches [13] [14]. This makes the function block diagram valuable as a specification of the control system.…”

Section: Processmentioning

confidence: 99%

Proposal of architecture and implementation process for IEC61508 compliant, dependable robot systems

Hanai

Saito²,

Nakabo

et al. 2012

2012 IEEE International Conference on Robotics and Biomimetics (ROBIO)

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Recent years have seen an increase in demand for robots that work closely with humans, or operate at disaster sites. These robots need to have high dependability. At the same time, the idea of system development based on standards is becoming important especially in the field of embedded systems including robots. IEC61508, which is a standard of functional safety requires the V-model of the engineering process and keeping the documents and programs of each phase consistent.However, this process costs a lot and freedom still remains about the choice of tools to support the development, the way of describing specifications/programs in each phase and so on. This makes consideration of the concrete development process and the tools used there before starting an actual development important. Accordingly, the purpose of this paper is to present a concrete architecture and a development process that is IEC61508 ready. We especially focus on the software aspect and mention related standards as well.

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“…Composite FB instances of a specific type also provide a specific interface and are actually an encapsulation of interconnected FBs (FB network). Although composite FBs could be considered as design time artifacts, the need for appropriate runtime modeling has been identified [11]. The rest of this section describes the FB execution models of the proposed execution environments.…”

Section: Function Block Execution Modelmentioning

confidence: 99%

“…There are several different schemes of FB network execution regarding the number of threads used and the thread-to-FB allocation policy, as examined in [11]. Three possible scenarios are distinguished: a) the whole FB network is executed by a single thread of execution, b) each FB instance of the FB network has its own (private) thread of execution, and c) a single thread of execution may execute a variable number of FB instances.…”

Section: Function Block Network Execution Modelmentioning

confidence: 99%

RTAI-based execution environments for function block based control applications

Doukas

Brusaferri²,

Colla

et al. 2007

2007 IEEE Conference on Emerging Technologies &Amp; Factory Automation (EFTA 2007)

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The IEC 61499 standard has been recently adopted to promote a more flexible development process in the control and automation domain. The standard mainly deals with modeling issues leaving a lot of model execution details open. Different research groups are already working for the development of execution environments for the defined component model, proposing implementations with different execution semantics. This paper discuss the semantics of the execution environment and presents two execution environments, which although independently developed share a similar view of IEC61499 execution semantics and are both implemented over RTAI (Real Time Application Interface), a real-time linux-based platform.

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IEC61499 Execution Model Semantics

Cited by 19 publications

References 7 publications

Towards an Object-Oriented extension for IEC 61131

Towards an Object-Oriented extension for IEC 61131

Proposal of architecture and implementation process for IEC61508 compliant, dependable robot systems

RTAI-based execution environments for function block based control applications

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