KMITL

Permanent URI for this communityhttps://dspace.kmitl.ac.th/handle/123456789/1

Browse

Settings

Access type: UnknownSubject: search.filters.subject.Foundation fieldbus

Search Results

Now showing 1 - 6 of 6
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Safety and availability of basic process control using foundation fieldbus with control in the field - An experimental analysis
    (2017-08-01)
    Sangsuwan, Thaksin
    ;
    Thepmanee, Teerawat
    ;
    Julsereewong, Amphawan
    Detailed knowledge of how to balance between safety and availability for instruments is essential to successful design and implementation in fieldbus-based process control systems. The configuration correctness is crucial to actually obtain the benefits of digital fieldbus technology used. In actuality, a number of device parameters must be set to provide the required functionalities. This paper focuses on improving safety and availability for the proportional-integral-derivative (PID) and cascade control strategies using Foundation Fieldbus (FF) with control in the field. The aim of this paper is to analyze the logical behaviors of PID and cascade loops in two conflicting purposes for studying how different configuration options affect the interlocks between function blocks located in instruments as well as the initialization and fail-safe mechanisms in response to invalid measurements. For safety purpose, the interested control loops are configured to bring the process to a safe state in the presence of a fault. For availability purpose, the interested control loops are configured to keep the process running in the event of a failure. A water tank process is utilized as a case study for control loop implementations. Interactions between the status propagation and mode shedding for demonstrating the studied control loop behaviors are examined experimentally in Petri net models. In addition, the function block options for bumpless transfer and setpoint tracking are also described. The proved configuration method for proper operations in balancing the interests of safety and availability is proposed.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Communication schedule optimization of cascade control using foundation fieldbus
    (2016-01-01)
    Sangsuwan, Thaksin
    ;
    Pongswatd, Sawai
    ;
    Julsereewong, Amphawan
    ;
    Morioka, Yoshitsugu
    ;
    Amano, Yoshiharu
    This paper presents a technique to optimize the communication schedules generated for synchronization of Foundation Fieldbus H1 devices in cascade control loop. A level-to-flow cascade control operated by the Harmonas-DEO host system is examined as an illustrative case study. Major objectives of the optimization are not only to minimize the latency of the control loop but also to maximize the availability of the network bandwidth. The proposed technique can be applied for H1 segment macrocycle schedules performing the control functions in both of the host controller and the field devices. Three examples for optimizing communication schedules generated from different control block assignments are described. The validation of the optimization methods can be determined by using two metrics: control loop latency improvement and publication gap availability improvement. Experimental results confirm that the proposed technique works effectively to operate the studied H1 segment for cascade control without any problems.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Detecting and handling alarms on process variables for s7-300 plc-based monitoring system
    (2015-01-01)
    Teerawat, Thepmanee
    ;
    Rudtavat, Vinitchaykul
    ;
    Krit, Smerpitak
    ;
    Sawai, Pongswatd
    This paper presents block structure and script concept for detecting and handling alarm from process signals. The three process signals (analog, wirelessHART and Foundation Fieldbus (FF)) are collected, detected and analyzed to show process variable (PV) statuses. Programming by function block and script is assigned to detect 4-20 mA from analog input (AI), public data from wirelessHART gateway, and diagnostic data from FF device. The detected data are analyzed in order to solve the alarm status on PV, then their statuses are launched on the SCADA. Analog, HART, and FF level transmitters are configured with programmable logic controller (PLC) and SCADA software for level measurements that are a case study to show the implementation and experimental results. The proposed technique can be a guideline for end-users to configure and manage the several alarm data from 3 type process signals that have different capabilities to be taken into consideration when making an alarm with PLC and SCADA system. Moreover, end users could apply the data to show with SCADA system for prediction and to enhance process behavior.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    S7 PLC-based foundation Fieldbus control system using STEP7 and RSFieldbus configuration tools
    (2014-02-04)
    Thepmanee, Teerawat
    ;
    Pongswatd, Sawai
    ;
    Phaerueang, Sarawut
    This paper presents a technique to configure Foundation Fieldbus devices for process control. The technique applies Foundation Fieldbus (FF) function blocks to cooperate with User-blocks of Siemens PLC. Function Block (FB), Function Call (FC), Data Block (DB) of PLC and FF function blocks are applied to create the assigned control program. In addition, S7 hardware, STEP7 Software, HMI, and OPC are described for hardware configuration, monitoring, diagnostics, and network configuration. The experiment indicates that proposed technique can implement the monitoring and controlling of Foundation Fieldbus Control System (FFCS) with S7 PLC. Moreover, the technique will support end-user to confirm the interoperability concept which avails for low maintenance cost and enhance data available from the field devices. © 2014 ICIC International.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Digital fieldbus-Analog system integration for revamping projects
    (2013-01-01)
    Thepmanee, Teerawat
    ;
    Pannil, Pittaya
    ;
    Pongswatd, Sawai
    ;
    Rerkratn, Apinai
    ;
    Julsereewong, Amphawan
    This paper presents a system integration of modern digital fieldbus and traditional analog devices for revamping projects. Using temperature transmitter with Foundation Fieldbus technology and power regulator with 4-20 mA control input for temperature control based on a PID instruction of programmable logic controller (PLC) is examined as an illustrative case study. A portable plant model was designed and implemented for real hands-on training. In addition, basic network and device configurations as well as ladder logic program and graphical user interface creations are discussed. Experimental results of temperature control in the range of 40-60 °C verifying the proposed concept are also included.
  • Loading...
    Thumbnail Image
    Some of the metrics are blocked by your 
    consent settings
    Item type:Publication,
    Design and implementation of the laboratory for foundation Fieldbus-Based industrial automation
    (2012-05-01)
    Thepmanee, Teerawat
    ;
    Pongswatd, Sawai
    ;
    Julsereewong, Amphawan
    ;
    Julsereewong, Prasit
    This article focuses on a design and implementation of the laboratory for education of Foundation Fieldbus-based industrial automation. A Centum VP system connected with level-control plant model via field digital network is described as an illustrative case study for configuring and commissioning fieldbus segment, defining control strategy, designing human machine interface (HMI) screen, and troubleshooting.