The application of PLC in the cleaning equipment

This paper introduces the application of PLC in the washing machine. Washing machine, the machine is used to flush the filter of the hydraulic system in the manufacturing, assembling, using and maintenance of generation or invasion of the pollutants, mainly divided into the general cleaning and ultrasonic cleaning. PLC through language, special NC positioning servo command form output, programming is very convenient; Perfect adjusting servo parameters, easy and convenient reach the control requirements of the system. PLC controller is convenient, stable and reliable performance of deep trust of customers. Key words: washing machine; FBs series PLC; Servo command a 1, project profile. Introduction to industry washing machine, wash machine is used for filtering of hydraulic system in the manufacturing, assembling, using and maintenance of generation or invasion of pollutants; The regular maintenance of can also be applied to the work of the oil filter, improve cleanliness, avoid or reduce the fault caused by pollution, hydraulic system equipment to ensure high performance, high reliability and long life. Cleaning machine varieties are: chemical, gas, hydraulic camera cleaning machine, cold water high pressure cleaner, hot water high pressure cleaner, electric drive cleaning machine, gas drive cleaning machine, electric heating high pressure cleaning machine, diesel heating high pressure cleaner, ultra-high pressure roller cleaning machine, industrial stainless steel high pressure cleaner, explosion-proof high pressure cleaner, figure 1 - hydraulic cleaning machines, ultrasonic cleaning machine 1 automatic through type cleaning machine spray 1. 2 the client needs the cleaner the newly developed device for the customer, the customer want to improve equipment automation degree, through the PLC and servo control to achieve transmission, spray, cleaning a series of automatic control. Due to the equipment sold to domestic and foreign markets, customer requests PLC have higher stability, ensure the normal operation of equipment for a long time, reduce maintenance costs. 1. 3 solution cleaning machine mainly logic control, sequence control, frequency control requirements is not high also. Choose FBs - case MA series economical host as the control unit. According to different equipment models, choose corresponding host respectively. Choose HU070S - human machine interface 00 series touch screen. 1. 4 the solution context MA series high functional host has 10 to 60 points, most hosts configuration 20 KHZ high speed counter at 8 o 'clock, 8 o 'clock 20 KHZ high-speed pulse output, can extend 2 a communication port, communication rate of 921. 6Kbps。 PLC program execution rate is 0. 33 us, process capacity up to 20 k Words, order instructions, 36, 326 application instructions ( 126) 1 the control core of the FBs - hardware configuration equipment Ma host a, FBs - 24 Ey 8 a, the host configuration 14 point input and output at 10. Host comes with a RS232 communication port, except as a programming port can also be used as a machine or other equipment from the station. Man-machine interface adopted HU070S - 00 a man-machine interface. Figure 2 - 2 control process design through type automatic spray cleaning machine work move and break up two parts, the following part mainly introduce the automatic control, the process as the chart below is control process flow diagram. Figure 2 - Through the type spray cleaning machine process flow diagram 2. 3 the software design 2. 3. 1 from the technological process of equipment and the writing of the PLC program, we can see the equipment control is a typical process control sequence. PLC programming instructions more than 300 kinds of, and USES the most humane, the most readable multi-input/multi-output instruction format, an instruction can achieve most of its function of PLC several instructions to do,, thus greatly streamline procedures and operation results can be directly obtained by internal or external output. On the design, operation and maintenance are convenient. The following figure 2 - 3 for part of the program flow control, the control is mainly applied FUN140 command control a servo motor running and stop so as to achieve accurate positioning of the function, it is also the equipment debugging difficulty; Through the special NC positioning instruction language to match the sequence control program to control effect; Through the application of the servo order form, reduce programming difficulty, improve the convenience and legibility of the program. Figure 2 - 3 the PLC ladder diagram 2. 3. 2 man-machine interface editor automatically by the type spray cleaning machine work move and break up two parts. The following figure 2 - 4 for the parameter setting debug screen, the screen can be directly modified suits walking speed, walking distance and time washing time and washing times. The following figure 2 - For manual debugging as is shown in the picture, the start of a single device via a touch screen to stop. Figure 2 - Figure 2-4 parameter Settings 5 manual picture three equipment debugging the equipment control technology is clear, divided into two parts, manual and automatic. Equipment debugging is carried out in accordance with the manual and automatic separate. First test the manual part of the program, a single structure by man-machine interface control devices start stop, completed the expected function of the equipment. Automatic control part of the program debugging is mainly aimed at the operation process and interoperation between each work step, the corresponding debugging servo walking and lifting cylinder. In the process of debugging can be very easy to the program breakdown, brought great convenience to the scene debugging. Automatic process display man-machine interface convenient operation, use of users. The following figure 3 - 1 for whole equipment trying to FIG. 3 2 as the main control part of the figure, FIG. 3 3 for the electrical control cabinet.
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