programmable logic controller control unit

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Design and Implement of a Programmable Logic Controller (PLC) for Classical Control Laboratory

Design and Implement of a Programmable Logic Controller (PLC) for Classical Control Laboratory

to the basic unit. However, some of the more sophisti- cated models can be linked by cable to expansion boards that can provide extra I/O. Therefore, with few excep- tions, when using this type of PLC, the system designer must take care to specify a unit that has enough inputs, outputs, and programming capability to handle both the present need of the system and any future modifications that may be required. Single board PLC’s are very inex- pensive, easy to program, small, and consume little po- wer, but, generally speaking, they do not have a large number of inputs and outputs, and have a somewhat lim- ited instruction set. They are best suited to small, rela- tively simple control applications [4].
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Implementation of Programmable Logic Controller for Proposed New Instrumentation and Control System of RTP

Implementation of Programmable Logic Controller for Proposed New Instrumentation and Control System of RTP

In order to enable the structural testing for FBD programs, software engineers have defined structural test coverage criteria suitable to FBD programs in which the unique characteristics of the FBD language were fully reflected. An FBD program is interpreted as a directed data flow graph and three test coverage criteria have been defined using the notion of the data flow path (d-path) and the d-path condition (DPC) for each d-path. To work out a solution to lack of systematic test evaluation methods, an automated test coverage measurement tool called FBDTestMeasurer, which measures the coverage of a set of test cases on the FBD program with respect to the test coverage criteria proposed in. Given a unit FBD program, a set of test cases, and selected test coverage criteria, FBDTestMeasurer generates test requirements with respect to the selected test coverage criteria and measures the coverage of the test cases automatically. It provides coverage score and unsatisfied test requirements as a result. Uncovered d-paths can be visually presented on the graphical view of the FBD program.
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Peat Water Treatment based Wireless Data Acquisition System for Flexible Remote Monitoring

Peat Water Treatment based Wireless Data Acquisition System for Flexible Remote Monitoring

Abstract— This paper presents design and application of automatic control system in the peat water treatment system with Advanced Oxidation Process (AOP) and Reverse Osmosis (RO) method using a programmable logic-controller (PLC) unit. All electronic circuits and the necessary software have been designed and developed to perform the technical tasks. A PLC unit was employed to control and monitor the mechanical movement of the pump, electric control valve, and ozone generator. The PLC collects and stores data related to pH, level, conductivity, and flow. It is found that the automatic control on AOP and RO system capable of running properly in accordance with the diagram of the process so that the system operational becomes easier, safer and monitored. The automatic control system can be employed as a standalone device and can be connected to a personal computer through the RS232 serial port to monitor the whole process on a computer screen.
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Implementation of a Vending machine using Programmable Logic Controller

Implementation of a Vending machine using Programmable Logic Controller

PLCs were designed and developed by Modicon. A programmable logic controller (PLC) is a specialized computer used to control machines and processes. It therefore shares common terms with typical PCs like central processing unit (CPU), memory, software and communications. Unlike a personal computer, the PLC is designed to survive in a rugged industrial atmosphere and to be very flexible in how it interfaces with inputs and outputs of the real world. Programmable Logic Controller, or PLC for short, is simply a special computer control system that continuously monitors the state of input devices and make decisions based upon the custom program to control the state of output devices. PLC implements logic control functions by means of a program. PLC’S were designed to replace relay logic system. They are used in many industries such as oil refineries, manufacturing lines, conveyor systems and so on.
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Automatic Packing Machine &Material Handling Using Programmable Logic Controller (PLC)

Automatic Packing Machine &Material Handling Using Programmable Logic Controller (PLC)

This project presents the idea of using programmable logic controller (PLC) in industrial automation. The use of PLC is a major factor. A digital computer used for automation of typical industrial electro-mechanical processes such as control of Machinery on factory assembly lines, amusement rides or light fixtures. The PLC is the main controlling unit & dc motor controls the conveyor belt. To accomplish this system, Dc motor, load cell, Photo-sensors are used.

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Industrial Internet of Things Based Programmable Logic Controller

Industrial Internet of Things Based Programmable Logic Controller

hardware description of the system and its specifications. Reference [4] In the Distributed Control System (DCS), the data exchange between the Programmable Logic Controllers (PLC) is usually completed through the wired network. ZigBee wireless communication technology is introduced in the design of a new type of PLC to overcome the communication cable boundaries. In [5] the planning is concentrated on development of mobile automatic guided vehicle (AGV) controlled by decentralized edge PLC SIMATIC ET200S hardware. Wireless communications area unit considered because the two leading two-way communications technologies for the rising good Grid applications in [6], because the received signals from the NB-PLC and wireless links area unit allowed to hold identical info, to supply robustness against the interference encountered on each links. In [7] the system is focused on developing an ESP8266 based Low cost Wi-Fi based wireless sensor network, the IEEE 802.11n protocol is used for system. In most of the existing wireless sensor network are designed based on ZigBee and RF frequencies. Reference [8] discusses the natural bottleneck between mass sensor information and Electric Power Communication Transmission Network to put forward the concept of information aggregation layer under the background of heterogeneous network convergence. And lastly, the [9] deals with the sample IOT based security system which utilizes the ESP8266 as the wireless module in order to implement the wireless technology. Delta PLC of the model DVP14-SS2 is used for the customization. They are a second-generation model which consists of 8 Digital Inputs and 6 Digital Outputs of a very slender make. High speed timers and counters can be accessed for multiple timing and scheduling of processes. It also sports an adjustable serial port and an expansion bus which facilitates additional modules for increased supervision without extra wiring and is powered by the SMPS connections. An RS232 cable is used to connect to the MAX3232 converter, from which the Wi-Fi module ESP8266 is connected, with the software program downloaded onto it from the Arduino in order to establish wireless transmission and reception. The MAX3232 is used to converts the signals from the RS232 serial port to the proper signal which are used in the TTL compatible digital logic circuits. The MAX232 converts the signals like RX, TX, CTS, and RTS and it is a dual driver/receiver.
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Development of a Programmable Logic Controller Training Unit for Engineering Technology Curriculum

Development of a Programmable Logic Controller Training Unit for Engineering Technology Curriculum

The system was constructed in a control cabinet as illustrated in Figure 1. All AC connections are preconfigured to prevent the risk of electrical hazard. Minimum recommended clearances were achieved in all instances except between the PLC and the VFD. It is noteworthy that while a larger cabinet was originally requested, a smaller, slightly less expensive alternative was purchased. Based on the configuration shown, each unit was estimated to cost approximately $2250 to build. While this cost did not account for future changes to the equipment, it does account for the stipend afforded to the faculty member charged with design and construction of the units. By comparison, the Lab-Volt model 5930 and 5930-A trainers were priced at approximately $6600 and $8100 respectively.
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A Novel Method of Induction Motor Speed Control Using PLC

A Novel Method of Induction Motor Speed Control Using PLC

Abstract— In any industry the induction motor plays an important role due to its low cost and simplicity. In the existing system motor speed is monitoring by HMI (Human Machine Interface). Due to this system, all parameters of motor are not monitored properly and continuous monitoring is done by man power in shift basis. The VFD consists of inverter with six power MOSFETs, PIC microcontroller and power supply. The speed of the motor is controlled by varying the frequency through Pulse Width Modulated (PWM) signals applied to the gate of the power MOSFETs. In VFD, the controls are programmed and implemented in PIC microcontroller to generate PWM gating pulses for the MOSFETs. PWM signals are pulse trains with fixed frequency and magnitude and variable pulse width. When a PWM signal is applied to the gate of power MOSFETs, it causes the output voltage of the VFD according to its turn on time. The inverter converts DC power to AC power at the required frequency and amplitude. By this the variable frequency is set by VFD and the motor speed can be changed to the required speed. The entire control system is switched by using PLC. Therefore, the main contribution of this paper is the monitoring, speed control of motor was done based on programmable logic controller, variable frequency drive and SCADA unit.
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DOUBLE COLUMN LATHE VERTICAL MACHINE CONTROL USING PLC

DOUBLE COLUMN LATHE VERTICAL MACHINE CONTROL USING PLC

As PLCs are now involved in most industrial processes, there for, development of a program to handle the control of a Double Column Lathe Vertical Machine will reduce maintenance rate and enhance machine performance. Further, a sigle PLC unit may control more than one motor via programming extra inputs and outputs already implemented in the PLC or simply by attaching additional input/output modules. The aim of this study is to control a Double Column Lathe Vertical Machine, using programmable logic controller (PLC) instead of conventional control.
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Rubbish Collector Monitoring System

Rubbish Collector Monitoring System

Rubbish Collector Monitoring System using the Visual Basic to monitor the manual operation when automatic operation is problem or to do maintenance for the system. While PLC systems is one system to collect the rubbish or waste in the river and drain automatically. Main objective to design this project is to ensure the collecting process operation in consecutive condition. Rubbish Collector Monitoring System is control by Programmable Logic Controller (PLC) unit, Visual Basic (VB) for manual and this system will be installing together the project. To operate this project, ladder diagram will be design to assemble the process step. From ladder diagram, all sequence of the project step will be show. That is making easier to troubleshooting the problem. While Visual Basic will be create the command and built the form for control the system. The form divide into 3 part such as motor 1, motor 2 and motor 3 which represent for container and front net of rubbish collector.
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Problem based learning approach in programmable logic controller

Problem based learning approach in programmable logic controller

To facilitate the learning process, the Process Control lab equipped with 15 sets of PLCs and personal computers (PC), which are standalone. Each of the PCs is installed with programming tool using ladder logic, which can be compiled, and upload to PLC unit either serial or network communication. Above figures are the facilitates that are being used by our students as shown in Figure 1 which is the lab for PLC and Process Control. In Figure 2, it is a PC connected to PLC system using a software tool that can upload and download codes in a ladder diagram form. Six units of PLCs are connected through a LAN using Ethernet, which can bring the speed faster at 10/100 Mbps as shown in figure 3 as one of the example. Figure 4, 5 and 6 are the plants that connected to individual PLC unit which are interconnected as shown in Figure 7.
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Industrial Water Pump Condition Monitoring by Using Time Signal Analysis and Fault Probability Distribution

Industrial Water Pump Condition Monitoring by Using Time Signal Analysis and Fault Probability Distribution

Therefore, avoiding unnecessary over-grinding, product quality variations reducing, also, specific energy consumption reduced. Cement mill controlled, including operation stability, and feed control with clinker. Fineness’s control until now; based on manually provided off-line fineness measurements strategy in Ain-Touta cement society. From a process point of view, the relatively fast dynamic response to changes in separator speed in the cement grinding process enables a fast and good control of the fineness based on continuously available figures of the product fineness.
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Web based remote monitoring, control and data acquisition load cell based cement packaging plant

Web based remote monitoring, control and data acquisition load cell based cement packaging plant

The load cell is used to measure the weight of the object. A load cell is a nothing but transducer which is used to create an electrical signal as per weight on it. Weight controller is a load cell controller which is used to measure the accurate weight of the object. 3-phase AC motor is used for operate the screw shaft that’s why the cement can be transmitted from hopper to bag. Contactor works as switch but here it is mainly use for safety purpose. Human machine interface is the interaction between the user and the machine at a given task.
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Integration of Weighing Indicator with Proprietary Commands into PLC-Based System Using Modbus Protocol

Integration of Weighing Indicator with Proprietary Commands into PLC-Based System Using Modbus Protocol

Abstract—This paper presents a technique to integrate a stand-alone weighing indicator with proprietary commands into a monitoring system of industrial production processes. The proposed technique is based on creating a new function block of the programmable logic controller (PLC) used in weighing machine control for converting weighing indicator commands into the Modbus-RTU commands. Creation of the function block operated in the PLC modeled CP1L-M30DR-D for converting commands of the AD-4401 weighing indicator to display on the Panel Master touch-screen monitor is described as an illustrative case study. Based on the proposed method, weighing data at the field site for local readout can be added into process data monitoring at the human machine interface (HMI) station of the PLC-based system. This enables ease of upgrading the weighing machine used, which has weighing indicator with local readout display. Performance of the proposed system integration is verified by experimental results.
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THE EFFECTS OF QUALITY FACTORS OF WEB BASED INFORMATION SYSTEM ON THE EMPLOYEE 
CONTEXTUAL PERFORMANCE

THE EFFECTS OF QUALITY FACTORS OF WEB BASED INFORMATION SYSTEM ON THE EMPLOYEE CONTEXTUAL PERFORMANCE

base is then automatically available in the manufacturing execution assembly system through deliberately designed graphical objects, which includes database table display windows, grids, trends, reports. Monitoring vision and control has supreme improved report management. This feature now has an additional and authoritative built-in report generator based on the .Net technology, which consents influential reports to be generated visually with statistical and graphical chart and graph functions to further simplify report generating within the manufacturing execution assembly system. The Monitoring vision and control report designer is one of the most influential reporting tools to have in any supervisory system. The great simplicity of the textual reports allows we create reports on RTF or HTML files also for simple compact systems.
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Design Improvements On Small Scale Production System

Design Improvements On Small Scale Production System

This Final Year Project is about the improvement of small scale production line. Improvement of the existing project is needed so that the system serves its purpose and functionality as a learning aid for engineering students in this university. This system is suitable as a learning aid to expose students about the basic mechanism in a production line and its control system. The main challenge in developing this project is to rewiring the system with a new Programmable Logic Controller (PLC) as the previous PLC for this system has been used for other project. With the new improvements, this project can contribute to the learning process of students in our university. The existing system has several mechanical flaws that could compromise its operation, therefore some improvements is required to ensure that this system can operate smoothly as it should be. The whole system is based on a real production line that can be found in industries. The application of PLC to control the pneumatic system has been used in some industries. Simulation for the PLC programming is done by using Automation Studio 5.0. Programming in forms of ladder diagram is simulate using the software to make sure that the programming is working. The improved programming was done to compensate with the hardware specifications. The usage of PLC makes the control system flexible and available for further improvements. Therefore, this project has potential to be further improved into a more complex manufacturing system.
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Multiple 3-Phase Motors Control With Password Protection

Multiple 3-Phase Motors Control With Password Protection

The control system is implemented and tested for rotor induction motors having a technical specification given in below Table. The induction motor is attached to variable frequency drive. The three-phase power supply is connected to a three- phase main switch and then to variable frequency drive. The terminal of VFD is supplied to the induction motors. The VFD is interfaced to the PLC-based controller. As a microprocessor based system, the PLC system hardware is designed and built up with certain modules, having a technical specification given in Table-2.The system consist of three phase main switches ,induction motors, variable frequency drives, PLC based controller. Block diagram of the experimental setup is being shown in Fig.3. The program is downloaded into the PLC from a personal computer with RS-232 serial interface. The status of motor is being displayed on Real time software SCADA which provides a supervisory control for the system.
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Development of water pressure and distribution monitoring system using PLC and Scada

Development of water pressure and distribution monitoring system using PLC and Scada

In order to automate the control of the water level storage tank and the pump station, there is a need to develop a controlling and monitoring system using Programmable Logic Controller (PLC) and SCADA (Supervisory Control and Data Acquisition). The PLC will communicate through its input and output to send the data to the monitoring system using SCADA. SCADA system will then process the data and display it to the user using visual and numerical display. All the setting and parameter adjustment, water level monitoring, data acquisition and data logging will be done through SCADA system. This system will always communicate with PLC to retrieve information, turn On/Off the system and manage the whole process. This system will help reduce error and downtime caused by human negligence. For this project, a controller for controlling the water level of the tank will be designed using Fuzzy Logic Controller and this controller will then be integrated together with PLC as switching device and SCADA as the monitoring and data acquisition device. The system also will consider the water pressure at the incoming pipe to regulate the pump operation.
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Design And Analysis Of Heat Pump Control System By Using Programmable Logic Controller

Design And Analysis Of Heat Pump Control System By Using Programmable Logic Controller

“I declare that this report entitle “Design and analysis of heat pump control system by using PLC” is the result of my own research except as cited in the references. The report has not been accepted for any degree and is not concurrently submitted in candidature of any other degree.

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Chemical Mixing For Process Industry Using PLC & SCADA Prof. Ajay Gadhe 1, Priti Bhojane2 , Kaveri Kawade 3

Chemical Mixing For Process Industry Using PLC & SCADA Prof. Ajay Gadhe 1, Priti Bhojane2 , Kaveri Kawade 3

ABSTRACT : In the past few years, after the Industrial revolution industries have adopted several automated machines for its purpose. In our project it is done by Programmable Logic Controller (PLC) and SCADA. This work will provide low operational cost, low power consumption, accuracy and flexibility to the system and at the same time it will provide accurate volume of liquid in bottle by saving operational time. The system sequence of operation is being designed by ladder diagram. Automating repetitive tasks in the industries increases the productivity. It reduces the probability of error and maintains product quality. Traditional methods of mixing fixed quantities of different types of liquids and filling them in bottles involve manual mixing of the constituent components based on measurements and bottling of the mixture as desired. Manual handling of such tasks is time consuming expensive and often lack consistency in product quality due to human errors. A Laboratory Prototype of a Programmable Logic Controller (PLC) based automated liquid mixing and bottle filling system is designed to automate the control and mixing of two different liquids in predefined proportion and filling the generated mixture in bottles to achieve quality control reduce human intervention and improve productivity. The main goal of proposed system is to adopt automation in the mixing industries like medicinal syrup manufacturing industries, colour mixing, and food industry.
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