Vacuum-pump control system using programmable logic controllers on the TCP/IP network for the 2.5-GeV storage ring

Developing a hybrid programmable logic controller platform for a flexible manufacturing system

This paper proposes a machine vision module for PLCs (Programmable Logic Controllers). PLC is the industrial controller most widely used in factory automation system. However most of the machine vision systems are based on PC (Personal Computer). The machine vision system embedded in PLC is required to reduce the cost and improve the convenience of implementation. In this paper, we newly propose a machine vision module based on PLC. The image processing libraries are implemented and integrated with the PLC programming tool. In order to interface the libraries with ladder programming, the ladder instruction set was also designed for each vision library. By use of the developed system, PLC users can implement vision systems easily by ladder programming. The developed system was applied to sample inspection system to verify the performance. The experimental results show that the proposed system can reduce the cost of installing as well as increase the ease-of-implementation.


 In this project, design and construction of an educational module has been carry out, allowing understand in a practical way, the concepts related to: control system, instrumentation, actuator, programmable logic controller, SCADA system and control algorithm. Module’s principal components are main tank, reserve tank, piping system, fittings, differential pressure transducer, turbine flowmeter, rotameter, control valve, solenoid valves, servovalve, centrifugal pump, PLC and a personal computer (PC). With this, automatic flow and water level control were achieve, through the implementation of a PID control algorithm. In the end, operation tests have been perform, generating changes in set point, and generating disturbances, to observe the response of the process and assess the control system.
 
 Keywords — control system, instrumentation, flow control, level control, PLC, SCADA, PID controller

The characteristics and applications of the system for welding machines based on SCM , based on PLC control system and PC-based industrial control system was introduced. It has certain significance to the design of welding machine control system.

The main challenges related to water affect human settlements' sustainability: the lack of access to safe and clean water at all times. These problems have massive consequences on human health, safety, economic growth, and development. Rujban city faces this crisis despite more than five decades trying to resolve this problem. In this paper, we describe the existing water supply system, which consists of three main components: Karthoom Automated Control System (KACS), Idref Automated Control System 1 (IACS1), and Idref Automated Control System 2 (IACS2). We propose the control system design of the KACS to meet the city's demand and keep the collecting tank with an acceptable level of water continuously. This paper presents the Karthoom Automatic Control System (KACS) design to control the water supply system using the Programmable Logic Controller (PLC). PLC controller is a central part of the proposed automatic control system due to its reliability and ease of installing and maintenance. Besides, we use PLC to carry out the water level control, sequencing, monitoring, display, and control functions, such as logic, sequence, timing, counting, and arithmetic logic. To maintain an appropriate water level in the collecting tank, we control the operation of the feeding submersible pumps ("on" or "off") by sensing the collecting tank's water levels. This is accomplished by utilizing four-stage-level sensors, seven water flow sensors, and an RF transmitter/receiver to monitor and control all pumps' operations and protect them from dry running and then accomplish the sensing stage. We introduce the control system components, the operation flow chart, and the proposed system's implementation. Finally, we implemented and conducted a simulation experiment using the Siemens S7-200 PLC to control the overall water supply system and evaluate the proposed control approach's performance.

Within industry today, advancements in process and control technologies have given way to differing control systems in the form of programmable logic controllers (PLC) and distributed control systems (DCS). Over the past decade, PLCs have now been able to bridge certain gaps within process and control systems that were capabilities only typically found within DCS environments. This paper will provide an overview of various control system strategies and design considerations with regard to both PLC and DCS schemes within petrochemical applications.

Petri nets have been extensively applied for specification, design, verification, performance evaluation, and simulation of discrete event control systems (DECS). The usual way to verify the dynamic behaviour of DECS design is to employ a process-based model, which proves to be impractical in application because the process-based model does not usually fully correspond to the control programming behaviour. This paper proposes a sensor-based stage Petri net (SBSPN) to represent a programmable logic controller (PLC) stage logic diagram (LD) for discrete-event control design. The new technique is able to simplify the modelling process of the complex PLC program without considering the interlocking problem within the ladder diagram. An illustrated example is used to explore the new methodology. The proposed method contains the power and flexibility of the Petri net analysis prior to the PLC implementation. It is believed that this technique is significant for industry practice.

Purpose: to analyze the possibilities of using programmable logic controllers (PLC) in water distribution management in the Don Main Canal. The work is an analytical study based on the principles of automation and optimization of water resources control. Discussion. The architecture of the control system, including programmable logic controllers, network modules and water level sensors in the main canal is discussed. The main attention is paid to justifying the use of PLC in the design and development of a water distribution control system, which allows control and regulate the water level in the channel using the upstream control scheme. The software offers possibility for monitoring water parameters, calculating optimal values and automatic adjustment of control signals. The advantages of using PLC in water distribution control system, including high flexibility, reliability and the possibility of easy integration with other systems are also analyzed. The methods of PLC setting, regulator optimization and energy management to achieve efficient and economical water resources management are described. The research confirms the effectiveness and applicability of using the programmable controllers in water distribution management system in the Don Main Canal. Conclusions: the results obtained make it possible to increase the efficiency of water resources use, reduce energy consumption and ensure stable control of water level in the irrigation canal.

In order to improve the degree of automation in plastic pipe production and save labor cost, this paper proposes a design scheme about the electric control system design of straight pipe automatic conveyor line. The Programmable Logic Controller (PLC) is the core control component in this system. This system can control the start and stop of production lines by applying communication between computer and PLC, change the number of each bundle of pipes, and monitor online the operation conditions of automatic transmission lines. Finally, actual operation of the system shows that it runs steadily, operates simply, and is highly automatic with low labor cost.

This research was conducted in one of automotive manufacturing industry of shock absorber. Air remaining is the process of preparing Shock Absorber to achieve ideal conditions i.e. ready to test the quality of its damping power. The trick is to remove the gas fluid contained in the cylinder so that the fluid remaining in the cylinder is just the oil fluid. If there is still a gas fluid left in the cylinder at the moment of the damping test, the Shock Absorber will experience momentary loss of power and this will greatly affect the quality of the Shock Absorber. The high frequency of repetition in the process of testing the quality of the damping power Shock Absorber on the Damping Force Tester machine due to not ideally Shock Absorber condition. This condition is one of them caused by the error of method in previous process that is air remaining process. Based on the above problems, then we research and design of new methods of operation of auto air remaining machine and design the control system. The method used is to utilize the gravity and the density of the two types of fluid, namely oil and gas to optimize the elimination process in Auto Air Remaining machine. The gas fluid can be perfectly eliminated. Control system design using Programmable Logic Controller (PLC). The Input and Output of PLC has used are 19 of inputs and 19 outputs. This method ensures the removal of the remaining air process.

This paper presents a standardization activity of Japan FA Open Promotion Group (JOP), especially an activity on two open network standards for Factors Automation. The networks are named as ADS-net and FL-net. which are standardized by JOP and proposed to ISO TC184/SC5. These are based on Ethernet. ADS-net is used for exchanging production data between PLC (Programmable Logic Controller) and Servers (Personal Computers) and FL-net is for exchanging data among PLCs.

Based on manufacturing technology analysis of bearing rings and on methods and instruments for their dimensional measurement, this paper recommends a post-process measurement system in which a Programmable Logic Controller (PLC) is used to supervise and locally command the measurement process and communicate with a personal computer. Decisions to modify the manufacturing process could be taken based on data processing and evaluation of results.

Using Bayesian networks in reliability evaluation for subsea blowout preventer control system

In this paper, a generalized implementation of DES-based supervisory controller methodology, that utilizes recent theoretical advances in conjunction with programmable-logic-controller (PLC) technology, is presented. The two primary advantages of the proposed methodology are: 1) the utilization of limited-size control strategies that can be efficiently generated online, and which are conflict and deadlock free by construction; and 2) the use of PLCs, which are currently the most suitable and widely employed industrial process-control technology. In our proposed methodology, a host personal computer (PC) possesses an online capability for the automatic generation of supervisory-control strategies, and their downloading to a PLC as required. The PLC, in turn, is responsible for monitoring the workcell reacting to events and enforcing device behaviour based on the current control strategy residing in its processor. A supervisory controller developed based on this approach, was successfully implemented for a manufacturing workcell in our laboratory.

The power generation using solar energy has been used widely many years ago due to fuel shortage and its low cost. In this paper, a design and implement of dual axis solar tracking system has been implemented using programmable logic controller (PLC). This proposed system, keeps the solar panels aligned with the sun during the sunrise hours, in order to maximize solar power extracted from the sun. In this work an open loop control systems been designed and carried out using PLC, and direct current motors for solar cell sun tracking. The tracking has done in two manners, that is, the usual daily sun tracking vertically, and the seasonal sun tracking horizontally. The second tracking technique, computes the difference in the day hours per year in four seasons, with the aid of PLC program, which is the solar time of the day hours or the sunrise hours of the day. After the system has completely installed a suitable measurement has been carried out for the fixed and moving solar panel. As compared with usual fixed panels, the power that has been obtained from the solar system is 38% better than the fixed technique.