Search Results

Now showing 1 - 4 of 4

Some of the metrics are blocked by your
consent settings
Toward Interoperable SCADA: Node-RED-Based Edge Integration of Heterogeneous PLCs and IoT Devices
(2025-01-01)
Smerpitak, Krit
;
Kaewchaiwong, Sattachai
;
Ukakimaparn, Prapart
;
Julsereewong, Amphawan
;
Pongswatd, Sawai
This article presents a novel approach to supervisory control and data acquisition (SCADA) design that emphasizes interoperability through edge integration, using Node-RED as an open-source programming platform deployed on an industrial edge computer. The proposed architecture integrates multiple-vendor programmable logic controllers (PLCs) and an Internet of Things (IoT) gateway at the edge layer to enable seamless interoperability across local control systems. A lab-scale case study demonstrates the feasibility of this integration, featuring four remote terminal units (RTUs) communicating concurrently with a SIMATIC IPC327G edge computer via standard protocols. Specifically, a SIMATIC S7-1200 (RTU-1), MELSEC iQ-F FX5U (RTU-2), and CompactLogix 1769-L30ER (RTU-3) control an object sorting station, a parcel sorting station, a water temperature control station, respectively, while a UG65 gateway (RTU-4) enables bidirectional data transfer between the edge computer and LoRaWAN devices. The inclusion of InfluxDB alongside Node-RED supports data logging and reporting functionalities. By distributing protocol translation, data processing, and shop-floor supervisory control to the edge layer, the architecture achieves real-time, vendor-neutral data orchestration while maintaining compatibility with a higher-level SCADA master terminal unit (MTU) or cloud system. Experimental results from both functional and performance testing confirm the system’s viability as a cost-effective, vendor-agnostic solution for modern industrial automation, offering a scalable model for multi-protocol industrial environments.
Some of the metrics are blocked by your
consent settings
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%.
Some of the metrics are blocked by your
consent settings
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.
Some of the metrics are blocked by your
consent settings
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.

KMITL

Browse

Filters

Settings

Sort By

Results per page

Search Results