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Author: search.filters.author.Chanwutitum, JirasakSubject: search.filters.subject.Safety

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    Item type:Publication,
    Comparative analysis between control in the host and control in the field in terms of safety and availability for foundation fieldbus-based process control
    (2018-04-01)
    Julsereewong, Amphawan
    ;
    Whatphat, Nopthawach
    ;
    Sangsuwan, Thaksin
    ;
    Chanwutitum, Jirasak
    ;
    Thepmanee, Teerawat
    Design work of process control to provide necessary performance requirements must be based on capabilities and limitations of the technology used. This paper aims at analyzing possible safety and availability enhancements of basic process control based on Foundation Fieldbus (FF) technology in which the control function blocks can be assigned either in the host system controller, called ‘Control in the Host’ (CIH), or in the field devices, called ‘Control in the Field’ (CIF). Implementing the control loops with CIH and CIF strategies for water tank process is utilized as a case study to demonstrate the proposed analysis. The major configuration details of field devices, control strategies, and function blocks are described. Experimental results were analyzed for examining the parameter options as well as the control loop actions in response to invalid measurements to compare the safety and availability improvements between the CIH and the CIF. The proposed analysis can be useful to enable economical solutions for design phase of the FF-based control loops.
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    Petri net modeling for performance analysis of FF-based process control in terms of safety and availability enhancement
    (2017-12-13)
    Sangsuwan, Thaksin
    ;
    Whatphat, Nopthawach
    ;
    Chanwutitum, Jirasak
    ;
    Thepmanee, Teerawat
    ;
    Julsereewong, Amphawan
    In case of device and communication failures, a basic process control using Foundation Fieldbus technology can be configured to provide either safety improvement for preventing hazards or availability enhancement for minimizing production losses. The purpose of this paper is to introduce a system modeling with Petri Net technique for representing the behaviors of the proportional-integral-derivative (PID) and cascade loops with 'Control in the Field' (CIF) and 'Control in the Host' (CIH) architectures in response to instrument and communication failures. The proposed modeling is useful for performance analysis of the interested control loops in terms of safety and availability improvement. Stakeholders of both brownfield and greenfield projects in process industry sector can select a proper solution to their necessary performance requirements.