The application of PLC in automatic beverage production line

Application of PLC in automatic beverage production line KeHongJin welcome to e hall exhibition hall 3 PLC PLC programmable controller, PLC programming cable. 。 。 The traditional beverage filling production line electrical equipment control system is one of the traditional relay - — Contactor control mode, in use process, the production efficiency is low, the man-machine dialogue on light + + button speaker works, slow response, high failure rate, poor reliability, system working status, fault handling, equipment monitoring and maintenance can only with experience of passive check point of failure. And easy to produce secondary pollution in the process of production, lead to the low percent of pass, the cost of production increases. The automatic production line is widely applied in many areas, the control part adopts programmable controller (often PLC) Control, it makes the production line running more stable, more accurate positioning, functions more perfect, more convenient operation. Programmable controller ( PLC) Based on microprocessor, integrated computer technology, automation technology and communication technology and developed a new type of industrial control device. It will traditional relay control technology and modern combine the advantages of both computer information processing, become the most important and most used in industrial automation control equipment. The international electrotechnical commission ( IEC) Issued in February 1987, the programmable controller in the third draft of definition: 'the programmable controller is a kind of digital computing operations electronic systems, specially designed for application in industrial environment, it USES a programmable memory, used in its internal storage to perform logical operations, sequential control, timing, counting and arithmetic operations such as instruction, and through digital and analog input/output ( I／O) , control various types of mechanical production process. Programmable controller and its peripheral equipment are industrial system be installed by easily with a whole and is easy to extend the functionality of the principle of design. ' In a nutshell, programmable controller is a general-purpose computer specifically for industrial control. PLC controller for the scene of the industrial environment, has the high reliability, strong anti-interference ability; Functional, flexible combination; Programming is convenient; Simple installation, maintenance and so on. Therefore, in the production line, machine tool in the complicated system such as design modification, PLC instead of relay contact control has become inevitable. In terms of beverage filling machine equipment, the United States, Germany, Japan, Italy and the UK manufacturing level is relatively high. Beverage filling machine we can use these countries to determine the development trend of our country in the gap between them, which should be referred to the direction to narrow the gap between China's beverage filling machine as soon as possible among the world advanced level. In this paper, after studying the characteristics of PLC, the basic structure and control method on the basis of introducing PLC technology in the beverage filling production line, beverage filling equipment based on PLC is designed, and obtained the preliminary application in hangzhou wahaha company. 1 the basic structure of PLC PLC is essentially a special computer, used for control as a result, it has to do with the general control machine has a great similarity in structure. The main characteristic of PLC is have stronger ability of interface and control object, that is to say, it is the basic structure of the main around design suitable for the requirement of process control. The basic component of a programmable controller system is shown in figure 1, it includes the following several parts. ( 1) CPU module, CPU module is the core of programmable module, which mainly consists of two parts, the microprocessor and memory. ( 2) Input/output modules: input/output module is programmable controller connected to the field device interface. ( 3) Programming device: programming device is programmable controller in the system is the most important peripheral device, it can be used to enter, check, modify, debug user program, also can monitor the condition of the programmable controller online. ( 4) Power supply module, power supply module to convert ac power to dc power supply, programmable controller need is programmable controller can work normally. 2 beverage filling production line control requirements ( 1) System by set the start button for automatic operation mode, after start production line conveyor belt drive motor start and kept until the stop button actions or filling equipment of sensors to a stop when a bottle is empty; ( 2) When the bottle positioning under filling equipment, delay of 1 second, filling equipment to work after 5 seconds automatically stop; ( 3) After the bottle filled with drinks, conveyor belt drive motor must start automatically, and keep to detect a new empty bottles or stop button. The system work flow chart shown in figure 2. Figure 2 beverage filling production line PLC controller control system work process 3 software design software USES the ladder diagram programming, the principle of modular is divided into relatively independent function block. Because of its high initial starting current, if the current directly through the motor working condition, the alarm will happen misoperation. We adopt quick-acting protection, make the system through the software implementation, when the initial avoid alarm judgment, and then enter into the state of current protection test. Software design rules in setting mode, different running status of equipment and the chain of online equipment/stop condition. Working condition of choice to detect system boot, the first button, any situation, abrupt stop button can stop all the equipment, in case of accident. 4 conclusion itself characteristics and advantages of using PLC controller, this paper designed a beverage filling production line PLC control system, the system hardware composition is simple, flexible, less investment software has a lot of instructions, can complete all kinds of complicated control functions.
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