A PLC Circuit Design Education of Complicated Operation in Production Facilities

Multiple input/output Programmable Logic Controller (PLC) module for educational purposes is fabricated because of current PLC Kit that was unable to enhance learners theoretical understanding and hands-on skill especially for programming, wiring, design of circuit and problem solving. The available PLC Kit comes with a casing which learners struggling in comprehend the theoretical knowledge, cabling connection between input components, PLC modules and output components respectively. Newly designed PLC modules are developed and fabricated with additional input and output devices, cost effective and user friendly. Moreover, this module come with multiple Input/Output (I/O) devices such as push buttons (normally open), DC motor (24V), DC relay (24V), DC solenoid piston cylinder (24V) and DC light (24V) and able to interfacing with different kinds of PLC controller produced by Matsushita, Omron, Siemens and etc. Through conducted surveyed, it is found that on average of 93.20% agreed that newly developed Multiple I/O PLC module is user friendly, safe and attractive to be used while 95.70% participants agreed that there are enhancements in theoretical understanding and hands-on skill aspect in their learning process.

In order to effectively solve the automation between patients and staff in a hospital room, we adopt the Programmable logic controllers (PLC) based contact hospital emergency calling device. After finishing system design task, we choose FX2N-128 MT type PLC, input/output address assignment, external circuit design and system software design. We obtain the System corresponding with practical technical requirements which is simple, economic, reliable and easy to use. [Conclusions] PLC control system is every effectual and it can also be a reference for other similar application.

The main objective of this project is to monitor and control the cooling system and seal oil system of the generator using Programmable Logic Controller (PLC) wirelessly in TPS-I Expn NLC. In present situation, the monitoring and control of cooling unit is performed by hard wired relay circuits in local mode semi automatically. This project also presents how it is possible to utilize PLC in the task of the Web server

This study discusses the design of an automatic water tank filling system based on a Siemens S7-200 Programmable Logic Controller (PLC) using a capacitive proximity sensor as a water level detector. The main objective of this study is to automate the filling of water tanks to make it more efficient, reduce energy waste and reduce errors due to inaccurate manual filling. This system is designed by utilizing a capacitive proximity sensor positioned as a detector of water level changes. The digital signal from the sensor is then processed by the PLC to automatically control the water pump using a ladder diagram program as its logic. The PLC functions as a control core that intelligently controls the output, namely the water pump. The research method includes block diagram design, ladder diagram programming, hardware assembly, and system testing. The test results show that the system is able to work stably with an accuracy level of 98.13%, based on the method of measuring the water level at 8 cm. Thus, this system can be implemented as an effective solution for automatic control in small to medium-scale water distribution systems. Keywords: PLC Siemens S7-200, capacitive sensor, automation, water tank filling, control system

7 - Troubleshooting control circuits

The purpose of the work is to develop an automated quality control system for welded joints of cable car structures designed and manufactured at the Skado LLC enterprise (Samara) in order to improve the quality of control. The analysis of requirements for welded structures and welded joints of cable cars is carried out, methods of control of welded joints are considered. A block diagram of an automated system for quality control of welded joints based on the method of ultrasonic testing has been developed. The analysis of ultrasonic sensors on phased arrays is carried out. The sensors and actuators of the system are selected. A scheme for interfacing system elements with a programmable logic controller has been developed. The structure of the system and the scheme of interfacing the system elements with the programmable logic controller are described. A method for performing control has been developed.

Programmable Logic Controller(PLC) is the most widely utilized and plays an important role in industrial control system. The study about a PLC language is performed actively. Ladder Diagram(ID) is the most widely used in PLC. In is not suitable for describing a complex sequential logic and is very difficult to grasp the sequential flow of control logic and has the disadvantage for a maintenance. On the other hand, Sequential Function Chart(SFC) is very easy to grasp the sequential flow of control logic and has the compatability for a maintenance but has the disadvantage for describing a condition and a interlock logic. In this paper, we propose the method that describe the interlock logic using management step, and confirm his feasibility through a actual examples.

Software safety analysis of function block diagrams using fault trees

Traditional programmable logic controllers (PLCs) remain central to industrial automation but are often expensive due to stringent compliance requirements. To address this challenge, this work proposes a low-cost and customizable framework for automation systems built upon open-source hardware and software components. The proposed solution integrates Linux-capable boards with an intermediate hardware module for input/output (I/O) management. A graphical user interface (GUI) based on the function block diagram (FBD) paradigm enables intuitive, visual logic programming, making the system accessible to users with different levels of expertise. Control logic is executed dynamically using a directed acyclic graph approach, which facilitates flexible processing and supports real-time updates without interrupting operation. The open-source design promotes flexibility and customization, positioning the framework as a versatile alternative to traditional PLCs. It is particularly suited for research laboratories, educational environments, small-scale industrial automation, and other cost-sensitive applications. Two case studies demonstrate its effectiveness in real-time control tasks, highlighting its practicality and ease of use. Given its open and modular nature, the framework is intended for educational use, research laboratories, and non-critical automation scenarios.

The Piper platform, installed in 1975-6 with initial production in November 1976, is believed to have had the world's highest production rate for a single integrated platform. By 1 July 1980, over 300 million barrels of oil and condensate had been produced, 114 million barrels of treated sea water had been injected and 529 million cubic meters (19 billion cubic feet) of gas had been compressed for transport to shore. This paper describes the basic design of the production surface facilities together with design modifications carried out to increase production capacity. Facility operating problems are described together with the steps taken to correct these problems. Also included are reliability factors of major pieces of rotating equipment. Facilities are now producing with an acceptable operating reliability.

There is a lack of rules and standards that provide guidelines for material selection and qualification of materials for offshore and onshore structures in arctic areas. Many current standards for low temperature applications such as cryogenic piping and process systems do not reflect the need for low-cost bulk materials for large volume applications such as pipelines and production facilities. The growing focus on oil and gas exploration in arctic areas has raised the need for new standards and industry practice that supports cost effective and safe installation and operation of production and transport facilities in the cold climate. There are materials today that are applicable for low temperature conditions. The grades are often highly alloyed (typically 3–9% Ni) with good toughness properties, but these alloys are expensive compared to conventional steel material grades. Such materials may not be applicable in pipelines, structures and process plants. This challenge can be met in two ways. First, structural steels that are capable of being welded and operated in the cold climate should be developed and qualified. Second, materials for forged and casted components that can be welded to the structural steels should be developed and qualified to fit into the integrated structure or pipeline system. Some actions have been taken to develop new standards e.g. within ISO19906, and actions are being taken in Russia to harmonize their specifications with the international standards, but this is a comprehensive job and the work must be executed in parallel with the development of new steels and welding technology.

Synergism of high and low level systems for the efficient management of greenhouses

A structured design procedure for systems integration sequential logic which is to be implemented on programmable logic controllers is presented. The procedure offers the advantages of producing intrinsically robust software which is very easy to understand and to modify as systems requirements change. The approach takes advantage of the sequential nature nature of processors to assure that the order of solution of the sequential logic equations is consistent with maximum speed and instantaneous correctness of the output states. The authors present examples of the basic elements of the structured design procedure from which any type of system integration can be implemented. An example is given of an industrial die cast molding machine system. >

As the expanding of the production scale, the efficiency and the stability of the manufacturing line begin to dominate the key role in manufacturing industry accompany the material monitor. It is learned that effective and correct operation will save a lot of producing cost. Therefore, in this paper, a monitor and control system framework architecture based on Radio Frequency Identification (RFID) technology is presented according to specific manufacturing requirement of discrete product line in China. In this system, the RFID technology is supposed to be combined with real time database and Programmable Logic Controller (PLC) etc. It is applied to enhance the automation of the manufacturing with RFID technology. A case in point is the application of the framework in one clothing factory. The feedback indicates that with the help of the RFID technology based system the productivity of cloth producing has been increased. It not only provides a stable manufacturing process and an accuracy management method for producing timely, but also increases the automation level of the manufacturing line. It can be reconfigured to determine the production facility's positions automatically.

Modular Automation offers promising technologies for the process and chemical industry. It meets the requirements for greater flexibility and a shorter development cycle for production facilities by dividing the process into smaller standardized units. Key element of Modular Automation is the Module Type Package (MTP). It represents a standardized and manufacturer-independent description of the automation interface for self-contained production units, or Process Equipment Assemblies (PEA), and endows the plug-and-produce capability of PEAs. Software solutions to program MTP compatible PEAs are mostly provided by the Programmable Logic Controller (PLC) manufacturers. They are proprietary and bound to certain hardware and even programming languages. Therefore, their suitability for implementation of soft sensors based on data-driven advanced analytics is strongly limited. In this article we present an opensource Python package, MTPPy, designed for rapid prototyping of MTP-capable soft sensors with a focus on AI-based research applications. MTPPy is aimed at the accelerated deployment of soft sensors in the modular plants; thus, closing the gap between the data-driven model development and integration into the production.