Smerpitak, Krit

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Smerpitak, Krit
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krit.sm@kmitl.ac.th

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    Wincc-based process simulation for virtual commissioning of scada system integration
    (2020-01-01)
    Thepmanee, Teerawat
    ;
    Tantaweenulak, Adisak
    ;
    Smerpitak, Krit
    In order to provide possibility for system integrators to verify the correctness and effectiveness of functions of a supervisory control and data acquisition (SCADA) system before on-site installation and actual commissioning, this paper presents a process simulation based on software-in-the-loop technique by using VBScript in WinCC for virtual commissioning. Design of integrating an existing control loop in water tank process of pharmaceutical manufacturing plant into a new SCADA is used as a case study. The interested process, which consists of inlet water pump, inlet control valve, level transmitter, and outlet water pump, is controlled by proportional-integral-derivative (PID) algorithm in a programmable logic controller (PLC) to maintain hydrostatic pressure in the water tank. Operations of the simulated process can be controlled in either manual mode or automatic mode. Moreover, the proposed simulation provides an option to imitate device failures that could not be done in real process due to damages for ensuring SCADA fault notification based on failure modes and effects analysis (FMEA). Experimental results of using the proposed process simulation for testing whether the created human machine interface (HMI) screens of the SCADA system integration fulfill functional design specifications are also included.
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    Design of PLC-based system for linearity output voltage of AC–DC converter
    (2022-04-01)
    Pongswatd, Sawai
    ;
    Smerpitak, Krit
    ;
    Asadi, Farzin
    ;
    Thepmanee, Teerawat
    This paper presents the PLC-Based system for controlling the SCR power module which is AC–DC converter proposes to linearity output voltage with trigger signal. The technique converted the trigger signal by arccosine function and analog module in the PLC. Converted signal from PLC system is fed to SCR power module instant the traditional signal. Proposed of this paper describes the PLC hardware configuration, compute/math and trigonometric functions with Studio 5000 software. In addition, the interfacing, parameters configuration, and monitoring are considered for testing. The technique with PLC-based, devices configuration and experimental results have been presented will be useful for electric power supply in the industry with more and more demand to apply the PLC system to develop the traditional industry to semi or automatic control in the industry.
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    Smart coffee vending machine based on IoT concept
    (2020-08-01)
    Pongswatd, Sawai
    ;
    Smerpitak, Krit
    ;
    Thepmanee, Teerawat
    In order to improve the effectiveness of franchise system, this paper describes how to utilize the Internet of Things (IoT) concept for upgrading a franchisor’s traditional coffee vending machine to be a smart coffee vending machine (SCVM) with remote monitoring and control capabilities. The IoT-based SCVM provides powerful web dashboard to monitor machine operation statuses, track ingredient and component availability, and adjust hot drink recipes. The proposed improvement can therefore help both franchisor and franchisee not only to ensure that how well the machine is operating, and how well the machine is stocked but also to plan that when a supply worker needs to pay a visit to the machine for refilling ingredients based on sales data, and when a maintenance worker needs to pay a visit to the machine for providing services based on technical data. The proposed technique uses an Arduino board to replace an existing machine controller and installs a Raspberry Pi module to perform as a gateway for data transmission between the SCVM and the Ubidots cloud server via Internet. The Node-RED engine running on the Raspberry Pi is utilized as the IoT platform to collect and process the technical and sales data of the SCVM that dispenses three kinds of hot drinks. Based on user login system, the franchisor is allowed to remotely monitor the interested parameters of all SCVMs on the created dashboard for ensuring product availability as well as to remotely control the ratios of instant coffee/cocoa powder and hot water for ensuring product quality, whereas each franchisee is allowed to remotely monitor the operation status and daily sales detail for his approved machines only. Test results from data simulations confirm that the upgraded SCVM and created dashboard subpages function correctly in accordance with the franchisor’s requirements.
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    Multi-PLC control system based on wireless bridge/base stations for work-in-process movements in corrugated box manufacturer
    (2018-12-10)
    Smerpitak, Krit
    ;
    Jearnpanitpong, Woravut
    ;
    Julsereewong, Amphawan
    ;
    Thepmanee, Teerawat
    This paper presents a practical technique to design and implement a cooperative control of two groups with three conveyors and two rail guided vehicles (RGVs) by using two master and two slave programmable logic controllers (PLCs), respectively. The controlled conveyors and RGVs are utilized for work-in-process (WIP) movements between a corrugator and six printing machines in a manufacturer of corrugated paper boxes. The proposed technique is based on the use of wireless bridge/base stations modeled Ubiquiti Rocket M5 and Loco M5 for interconnections of two master PLCs modeled Omron CJ2M-CPU31, two slave PLCs modeled Omron CP1L-M40DT-D and connected with Omron CP1W-EIP61 module, and a host application over a control network to communicate with each other through EtherNet/IP technology. Input and output devices of each controlled subsystem are hardwired to each PLC. The transmission and reception schemes to enable real-time input/output data exchanges between the PLCs are specified with tag names for cyclic communications on data links. The proposed multi-PLC control system for WIP movements can operate in accordance with the manufacturer’s requirements.
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    EXPERIMENTAL STUDY ON ENERGY CONSUMPTION OF TEMPERATURE CONTROL BY USING ON-OFF INTELLIGENT FUNCTION
    (2023-05-01)
    Pongswatd, Sawai
    ;
    Sopha, Watcharapon
    ;
    Asadi, Farzin
    ;
    Smerpitak, Krit
    ;
    Thepmanee, Teerawat
    In order to save electrical energy for on-off temperature control, a useful concept of on-off intelligent function to execute in a programmable logic controller (PLC) is presented. An implementation of PLC-based control system based on electric heating is also described as a case study to demonstrate the performance of the proposed function. IEC 61131-3-based ladder diagrams were created by using Studio 5000 software to run in the PLC modeled CompactLogix L30ER. Compared with the traditional on-off control action, the proposed on-off intelligent function can minimize energy consumption of a heater used in the implemented temperature control by 4.57%-6.65%.