functionblocks provides a means to model and program industrial control systems. The recently acclaimed IEC 61499 standard allows such system models to be partitioned and executed in a distributed fashion. At device ...
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ISBN:
(纸本)9781479948451
functionblocks provides a means to model and program industrial control systems. The recently acclaimed IEC 61499 standard allows such system models to be partitioned and executed in a distributed fashion. At device level, such models are traditionally implemented onto programmable logic controllers that underneath have an operating system and a software run-time environment which implies high resource demands. However, there is a current trend to involve small embedded systems (so called Internet of Things devices) integrated into such distributed control systems. To this end, we seek to address the outsets for real-time execution of functionblock based designs onto light-weight controllers (MCUs) with limited resources (memory and CPU). Furthermore, we propose a mapping of the function block execution semantics onto the RTFM-kernel, and discuss opportunities for off-line (design time) analysis with respect to response time, overall schedulability and memory requirements.
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