Control of a Safety-instrumented Mechatronic Production System by Deploying Intelligent Remote Terminal Units
Hameed, Qureeb Olasunkanmi (2020)
2020
Degree Programme in Automation Engineering, MSc (Tech)
Tekniikan ja luonnontieteiden tiedekunta - Faculty of Engineering and Natural Sciences
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Hyväksymispäivämäärä
2020-07-31
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:tuni-202007176363
https://urn.fi/URN:NBN:fi:tuni-202007176363
Tiivistelmä
From parallel wiring to serial fieldbus systems and now to industrial ethernet, industrial communication protocols have evolved to meet the demands of modern industrial applications to convey not just process data but also device diagnostics and safety information via the same physical link. Such advanced capabilities of networking solutions are responsible for the array of intelligent devices that have become the mainstay of modern production systems.
The theoretical part of this thesis addresses three fundamental areas of interest, in the following order: the first part establishes the PLC as the device at the heart of a modern industrial control system, and discusses safety PLCs as naturally evolving from the in-creased reliability of modern microprocessor-based electronic devices; the second part focuses on modern industrial networking technology, which have made it possible for an industrial control system to be composed of controllers and RTUs often in multiple hierarchies and in well-established communication relationships; and the third part is about the protection of humans and machinery from hazards by way of design and by applying the recommendations of relevant international standards.
The practical part implements centralized control of a profinet network of F-PLCs in a two-level controller-RTU system with a decentralized safety architecture. Typical considerations and justifications for the choice of control architecture are presented as well. The safety system uses signals from two laser scanners to put the production system in a safe state when the beam is broken by a foreign object.
The theoretical part of this thesis addresses three fundamental areas of interest, in the following order: the first part establishes the PLC as the device at the heart of a modern industrial control system, and discusses safety PLCs as naturally evolving from the in-creased reliability of modern microprocessor-based electronic devices; the second part focuses on modern industrial networking technology, which have made it possible for an industrial control system to be composed of controllers and RTUs often in multiple hierarchies and in well-established communication relationships; and the third part is about the protection of humans and machinery from hazards by way of design and by applying the recommendations of relevant international standards.
The practical part implements centralized control of a profinet network of F-PLCs in a two-level controller-RTU system with a decentralized safety architecture. Typical considerations and justifications for the choice of control architecture are presented as well. The safety system uses signals from two laser scanners to put the production system in a safe state when the beam is broken by a foreign object.