Thepmanee, Teerawat

Preferred name

Thepmanee, Teerawat

Main Affiliation

School of Engineering

teerawat.th@kmitl.ac.th

Now showing 1 - 6 of 6

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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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Reliability enhancement of LNG fuel gas supply system in combined-cycle power plant
(2020-12-01)
Thepmanee, Teerawat
;
Nachasingha, Chakri
;
Kummool, Sart
This article aims to present a technique to enhance reliability of liquefied natural gas (LNG) fuel gas supply system (FGSS) of gas turbine unit in a combined-cycle power plant. In order to prevent unplanned plant shutdowns, the proposed technique is based on the use of failure modes, effects, and diagnostic analysis (FMEDA) to identify and evaluate the effects of possible failure modes, to determine what could minimize the chance of failures, and to design a new safety interlock. The studied FGSS consists of gas analytical system (GAS) in 2-out-of-2 voting scheme, shutdown valve system (SDV) in 1-out-of-2 voting scheme, fuel gas controller (FGC), and engineering/operator workstations. Two automatic GAS subsystems with different measurement methods are installed in the GAS. One of two GAS subsystems uses three gas chromatography analyzers in 2-out-of-3 voting scheme. The gas chromatography results and diagnostic alarm historian are utilized to consider the failure behavior. The reliability models for the GAS subsystem using gas chromatography and the overall FGSS are also included to confirm the effectiveness of utilizing diagnostic information from the gas analyzers. Based on the FMEDA results, the new safety interlock with no additional software and hardware costs can be achieved. The workability of the proposed safety interlock is demonstrated by test results.
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Seeded Region Growing based on Localizing Histogram
(2003-10-16)
Sirisantisamrid, Kaset
;
Kummool, Sart
;
Srisuttaboot, Sasi
;
Thepmanee, Teerawat
This article presents segmenting image by seeded region growing and using a technique for selecting the suitable seed points from localizing histogram. Any gray levels on histogram have the maximum frequency (local maximum) in each period, and then defined as seed points of that period. The seed point closely attached with one then combined together as seed region. The obtained seed regions are performed region growing by iterative method until can not be done. Finally, the obtained sub-regions are merging by consideration from the group of average gray level of histogram or arbitrary setting by user. The purposed method of image segmentation compared with other one as shown on the experimental results and its advantage is reduce computational time.
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PLC FUNCTION BLOCK CREATION FOR MINIMIZING DATA LINK LIMITATION ON CC-LINK-BASED CONVEYOR HANDLING SYSTEM
(2022-07-01)
Pongswatd, Sawai
;
Niyomtamarat, Patipak
;
Kummool, Sart
;
Thepmanee, Teerawat
In order to solve a facing network capacity problem when improving an existing conveyor handling system controlled by programmable logic controllers (PLCs) on master-slave control and communication link (CC-Link) network at a wooden pallet manufacturer, this article presents a software technique for short-term solution. For new requirements to upgrade a pallet sortation to be automated by installing new robotic handling unit, a slave PLC using an interface module modeled FX2N-32CCL (or slave PLC1) cannot receive all specified data of pallet production models from an existing master PLC using intelligent module modeled QJ61BT11N in one communication cycle due to limited data links. To overcome this limitation, a PLC function block creation based on data sorting approach is proposed. Two new function blocks named FB SEND and FB RECEIVE are created based on IEC61131-3 standard for adding to the existing ladder diagrams, which execute on the master PLC central processing unit (CPU) and slave PLC1 CPU, respectively. Experimental results verify that the created function blocks can provide data transfers correctly between the specified sources and destinations. The data received at the slave PLC1 CPU are similar to the data sent from the master PLC CPU. With the proposed solution, the desired conveyor handling system can be upgraded according to user’s requirements.
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APPLYING MELSOFT GEMINI SOFTWARE FOR DIGITAL TWIN CREATION IN AUTOMATION SYSTEM PROJECT PHASES
(2026-08-01)
Thepmanee, Teerawat
;
Sopha, Watcharapon
;
Asadi, Farzin
;
Pongswatd, Sawai
;
Kummool, Sart
In the era of Industry 4.0, Digital Twin (DT) technology played a critical role in advancing manufacturing systems, particularly in real-time process simulation, performance optimization, and strategic decision-making. This study presents the application of MELSOFT Gemini software to develop DT for simulated industrial automation project phases. The system is designed to enable seamless data access and integration from physical devices into the DT in accordance with ISO 23247. The development process comprises two phases. The pre-deployment phase involves creating 3D models and simulating system behavior within a virtual environment prior to actual implementation. The Synchronized Operation phase enables visualization in MELSOFT Gemini through the transmission of data from physical devices via Operational Technology (OT) systems and Autonomous Mobile Robots (AMRs), using standard protocols such as OPC UA. The developed system accurately replicates the actual production process, provides early safety alerts, supports connectivity with various device types, and allows for future scalability all while maintaining compliance with the ISO 23247 framework. These findings demonstrate the potential of MELSOFT Gemini as a core platform for implementing practical, industry-ready DT systems.
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Condition monitoring based on failure modes and effects analysis using scada software for wirelesshart devices
(2018-04-01)
Kummool, Sart
;
Thepmanee, Teerawat
;
Pongswatd, Sawai
This paper presents the design and implementation of condition monitoring for WirelessHART devices by using the supervisory control and data acquisition (SCADA) software called WW InTouch. The design of the proposed system is based on a concept of failure modes and effects analysis (FMEA) for creating the human machine interface (HMI) on the operator workstation. The implementation of the proposed system is based on a technique of WirelessHART-Modbus TCP data transfers by mapping the HART tag names from the field wireless devices to the Modbus registers in the WirelessHART gateway. The script functions running on the HMI for detecting the published diagnostic data of the monitored devices and for identifying the FMEA results of device and power supply failures are created. A WirelessHART temperature transmitter and a wired HART control valve positioner connected with Wireless THUM adapter are employed as the interested field devices for monitoring their abnormal operating conditions to verify the workability of the proposed system. Experimental results from the failure mimic show that the proposed system based on FMEA can function correctly.
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Thepmanee, Teerawat

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