Julsereewong, Amphawan

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Preferred name
Julsereewong, Amphawan
Alternative Name
Julsereewong, A.
Main Affiliation
Email
amphawan.ju@kmitl.ac.th

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    Item type:Publication,
    AVAILABILITY THROUGH FIELD DEVICE DIAGNOSIS IN FEEDFORWARD CONTROL: A CASE STUDY OF FOUNDATION FIELDBUS-BASED TEMPERATURE CONTROL
    (2022-02-01)
    Kummool, Sart
    ;
    Suwanmanee, Ittimon
    ;
    Weerathaweemas, Songchai
    ;
    Julsereewong, Amphawan
    ;
    Sittigorn, Jirasak
    For endusers, requiring an action to enable a fieldbus-based process control that is not hazardous to continue its operation in the event of transmitter failures, it is essential to understand how diagnostic capability of field instruments is helpful in availability enhancement. In order to effectively implement a feedforward control strategy with increased availability, this article presents a control configuration method when utilizing a Foundation Fieldbus (FF)-based temperature feedforward control as an illustrative case study. Four function block assignment options for configuring the studied control strategy during engineering phase are described. The ‘Uncertain’ measurement status provided by temperature transmitters is treated as ‘Good’ measurement status in all control configuration options for availability goal by reducing process downtime. In addition, based on experimental results, a simplified Petri net model for logical behavior representation of the interested FF-based feedforward is also proposed.
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    Item type:Publication,
    Safety enhancement for basic process control using 4-20 milliampere signal transmission
    (2021-08-01)
    Julsereewong, Amphawan
    ;
    Muangmool, Phongphiphat
    ;
    Thepmanee, Teerawat
    To enhance safety of basic process control using traditional 4-20 mA current loops with/without transmitting a return signal of actual actuator position back to a host, this article presents a useful technique to provide fault-state and fault-recovery actions in four patterns. The proposed technique is a design of control drawings configured in a distributed control system (DCS) host for conventional proportional-integral-derivative (PID) loops with/without feedforward path to improve actions of the control loops in response to sensor and actuator failures. The configuration design based on functions of failure status propagation and failure mode shedding for eight control drawings that contain software function blocks for running on the DCS host modeled CENTUM VP is described. Simulation results by employing the DCS virtual test function verify that all designed control drawings can successfully perform the desired fault-state and faultrecovery actions for process safety enhancement.