RTFM-RT: A threaded runtime for RTFM-core - towards execution of IEC 61499

Lindner, Andreas; Lindner, Marcus; Lindgren, Per

doi:10.1109/etfa.2015.7301501

Cited by 6 publications

(1 citation statement)

References 14 publications

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“…2) RTFM Run-Time Systems: Models in RTFM be efficiently executed by the RTFM-kernel on single-core bare metal platforms [15] and by the RTFM-RT [16] onto hosted environments that provide threading primitives.…”

Section: ) Rtfm Model Of Computationmentioning

confidence: 99%

A real-time semantics for the IEC 61499 standard

Lindgren

Lindner

et al. 2015

2015 IEEE 20th Conference on Emerging Technologies &Amp; Factory Automation (ETFA)

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Abstract-The IEC 61499 standard provides an executable model for distributed control systems in terms of interacting function blocks. However, the current IEC 61499 standard lacks appropriate timing semantics for the specification of timing requirements, reasoning on timing properties at the model level, and for the timing verification of a specific deployment.In this paper we address this fundamental shortcoming by proposing Real-Time-4-FUN, a real-time semantics for IEC 61499. The key property is the preservation of non-determinism, allowing us to reason on (and verify) timing properties at the model level without assuming any specific scheduling policy or stipulating specific order of execution for the deployment. This provides for a clear separation of concerns, where the designer can focus on properties of the application prior to, and separately from, deployment verification. The proposed timing semantics is backwards compatible to the current standard, thus allow for reuse of existing designs. The transitional property allows timing requirements to propagate to downstream sub-systems, and can be utilized for scheduling both at device and network level.Based on a translation to RTFM-tasks and resources, IEC 61499 the models can be analyzed, compiled and executed. As a proof of concept the timing semantics has been experimentally implemented in the RTFM-core language and the accompanying (thread based) RTFM-RT run-time system.

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Section: ) Rtfm Model Of Computationmentioning

confidence: 99%