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Author: search.filters.author.Pongswatd, SawaiSubject: search.filters.subject.PLC

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    Implementation of control and SCADA system: Case study of Allen Bradley PLC by using WirelessHART to temperature control and device diagnostic
    (2022-04-01)
    Thepmanee, Teerawat
    ;
    Pongswatd, Sawai
    ;
    Asadi, Farzin
    ;
    Ukakimaparn, Prapart
    System integration for process automation promoted the technologies that were accessed to functions and data of field device, controller, and SCADA system. In addition, the data from filed devices can apply to solve device diagnostic and preventive maintenance. This paper describes the practical technique to configure and implement of control and SCADA system that focus on integration of field device, PLC controller, and SCADA system. The paper presents case study of Allen-Bradley (AB) PLC by using WirelessHART device to temperature control and device diagnostic through SCADA system. PLC's input/output (I/O) modules are installed that consists of Modbus module, digital I/O module, analog I/O module. In addition, Prosoft configuration builder and Studio 5000 software are new software to build add on Modbus instruction and ladder diagrams, respectively. The experiments perform in case study of temperature control by using Proportional–Integral–Derivative (PID) function in the AB PLC. Wonderware InTouch SCADA software is implemented to monitor the process mimic, trend, and alarm. Moreover, the technique can support the operators and engineers to make decision for process control and devices diagnostic.
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    Hmi implementation using radar chart for dual-loop system
    (2019-08-01)
    Pongswatd, Sawai
    ;
    Smerpitak, Krit
    ;
    Kummool, Sart
    This article presents a method to implement the Human Machine Inter-face (HMI) for providing high visibility of dual-loop system to encourage good operations and maintenance practices. The proposed method is based on the employment of radar chart to display key performance metrics of simultaneous and independent control of two identical loops for extensive event monitoring. Two level control loops utilizing two Proportional-Integral-Derivative (PID) function blocks of a single Programmable Logic Controller (PLC) are used as the case study to show the workability of the proposed HMI implementation. Each loop consists of a transmitter for measuring the controlled level an inverter for inverting the PLC output to adjust a pump speed, and a power meter form easuring the pump power consumption. The transmitter outputs from both control loops are applied to the PLC analog input module, and then separately scaled to be available to each PID block. The PLC analog output module is used to pass the PID block outputs for manipulating inlet flow rates. The performance metrics including the set point, process variable, manipulated variable, and pump power consumption of both control loops are detected and collected by the HMI/Supervisory Control and Data Acquisition (SCADA)station. All detected data of four performance metrics are represented on the axes of radar chart in real time by using the Wonder ware In Touch software. The script functions to save and load the specified data to the SQL server database are also created on the HMI/SCADA station. Experimental results confirm that the proposed HMI implementation can function correctly.
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    Applying radar chart for process control behavior
    (2018-06-08)
    Pongswatd, Sawai
    ;
    Smerpitak, Krit
    This paper presents the technique to show the controller parameters value that can support decision making of controller action and instruments, actuator operation. In addition, energy consumption is detected of any points of process operation. The paper describes method to detect and collect the assigned process control parameters from process components then display their parameters by radar chart. All of assigned parameters are used to construct the plotted of radar figure. The paper designs background and foreground by representation with rectangular array and length of each spoke in radar chart is proportional to magnitude of set value(SV), manipulate value(MV), process value(PV) of PID controller parameters. In addition, watt power (W) of energy consumption in the process is detected and stored. Each spoke of radar chart represents each parameter that converts to scale as 0-100%. The script functions are developed at the SCADA (Supervisory Control and Data Acquisition) station to detect, collect and scale, then store detected parameters in database. The experiments perform in case study of level loop control of water tank processes by using a proportion-integral-derivative (PID) function in the Programmable Logic Controller (PLC) and Wonderware InTouch SCADA software. The technique can apply for exiting SCADA to create the radar chart. Nevertheless, the new version of SCADA software can support the feature but it depends on cost license fee. Moreover, the technique can support the operators and engineers to make decision of process devices performance (instrument, actuator, controller), process operation and condition.
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    Using wired hart and wirelesshart together for PLC and SCADA system
    (2015-01-01)
    Thepmanee, Teerawat
    ;
    Pongswatd, Sawai
    ;
    Kummool, Sart
    ;
    Subpayasomboon, Siramet
    Wireless Technology has promoted in the process automation because it does not require power and communication wiring for field instruments that enables reduced engineering cost. At the same time, end-users consider the developments of process automation by using wireless devices due to the growing of the new plants and replacing analog or wired HART plants. The paper presents a technique to modify wired HART device to be WirelessHART device and to configure it for communication with other WirelessHART devices. A PLC (Programmable Logic Controller) and SCADA system is used to provide centralized device information, historian, and HMI. Installation and configuration techniques of wired HART, THUM adapter or repeater, WirelessHART, HART gateway are described. In addition, engineering and SCADA software are assigned based on OPC to share WirelessHART data with gateway, PLC and SCADA system. The experimental results by using S7-300 Siemens PLC, WW InTouch, and HART devices in level process control are included to confirm the system workability. Moreover, the technique could be applied to collect data for end-user support to quickly and easily gain the benefits of device diagnostic and to decide the plant operation and planning.
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    Simplified and systematic plc programming technique: A case study of burner control for thermal oil heater
    (2015-01-01)
    Khaefoi, Supakit
    ;
    Smerpitak, Krit
    ;
    Pongswatd, Sawai
    ;
    Julsereewong, Amphawan
    This article presents a technique to simplify and systematize programmable logic controller (PLC) programming for ease of engineering. A PLC-based burner control for thermal oil heater is examined as an illustrative case study. Based on the proposed method, two example cases of PLC programming for the modified burner control by adding input devices and alarm and shutdown conditions are described. Performance of the proposed technique is demonstrated through experimental tests done by nine engineers with difference experiences for ladder-logic-based PLC programming. Experimental results show that the proposed technique provides ease of reusing and modifying the existing ladder logic code and saving of time for writing the programs.
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    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.