In EH PLC and touch screen in the application of the printing machinery control

Pick to: digital, intelligent printing machine key technology and equipment projects is about books, newspapers, commercial printing packaging decoration, major equipment urgently needed. This paper introduces in the application of the products in the printing machinery industry. Key words: PLC; Touch screen. 1 introduction of digital frequency converter, intelligent key technology printing machinery and equipment project is about books, newspapers, commercial printing packaging decoration, major equipment urgently needed. Double-sided printing is printed publications printing, manual as well as the first choice for high-end notebook printing printing process. Double-sided printing can ensure complete, print a printing efficiency exponentially. Folio two-sided offset printing machine is a new kind of high-speed double-sided printing presses, suitable for printing of books and magazines and other print. High-speed double-sided printing presses with high speed printing high quality print favored by users. Project used in mechanical and electrical automation products for electrical design improvements. 2 process automated analysis of high-speed double-sided printing machine motor control the whole machine of paper machine, paper machine and the host of three parts. Host in addition to the main motor, and the water roll motor, motor brake roller respectively by four inverter control, the rest of the seven major action by the cylinder respectively to control the water roller, water roller, ink roller, ink roller, paper, under the roller, the roller clutch action. Pneumatic control is divided into two types of manual and automatic mode. The core of the whole machine debugging work is electric, pneumatic and mechanical action to match, avoid the waste of printing in the paper. Work due to the automatic mode the action do you want to work in a certain order, at the clutch of mechanical CAM is used to control the action point of view, electric choose type two phase incremental rotary encoder to real-time measure the rotation Angle of CAM, a week every rotary encoder, produce 360 pulses, the PLC high-speed counter counts 720, to zero after reset to count. We can change the Angle value of encoder, to match the mechanical changes or because of different speeds, inertia is different, the Angle of movement required value is different, dispense with cumbersome mechanical control. 3 3 sets of mechanical and electrical technology automation applications. 1 system principle to design the control of the machine tool in the DVP - EH type PLC as the technology platform, touch screen for operating interface, frequency converter as an executive component. Touch screen with DVPEHPLC COM is linked together, through the COM2 port using the MODBUS protocol. Four frequency converter, PLC controlled by 485 support the MODBUS protocol. 3. 2: delta PLC system configuration design DVP64EH00R DVP08XP11R + extension. In touch screen: DOP - A57CSTD。 In the inverter: VFD110B43A; VFD004M21A。 Framework is shown in figure 1. Figure 1 3 printing machine system configuration design. 3 cases (programming 1) Touch screen display alarm. Of EH series PLC controller provides a convenient high-speed count function, make simple programming, debugging quickly. We will encoder signal lines connected to the PLC high-speed counter terminal X0, X1, X2 reset terminals of the encoder, corresponding counter for C251, Y23 run as host, two phase when the encoder mistake, touch screen display alarm M455, as shown in figure 2. Figure 2 touch screen display alarm ( 2) Communication debugging. In small electrical control system, the communication between the equipment debugging is a difficult problem, but in PLC and frequency converter are concise communication instruction, an instruction can solve the problem. Such as read the output frequency of frequency converter, first write communication protocol, then use the instruction: including communication command device address of 01, data address H2103, data length 2 word. Both communication dispense with intermediate relay control, reduced the hidden trouble of fault and reuse the read data from the PLC touch screen, you can easily monitor problems arising from the operation. （ 3) Design picture. The application of touch screen omitted some of the original button, indicator light, counter, tachometer, time relay, and lubrication programmable controller and other components, reduce the failure rate, and the workload of wiring. In the man-machine editing software - TP Editor provides seven levels of password protection, is conducive to use manufacturer has carried on the limits, to the use of certain conditions to protect the interests of users. For touch screen with 3 m's memory, so the design in the picture in the form of version offers a wide range of alarm information, and also designed the screen more PLC controller input and output state surveillance images, this machine was introduced in detail in the system helps the electrical operation and maintenance tips, make the whole machine electrical system simple and convenient operation, use, maintenance, see figure 3. Figure 3 touch screen design 4 conclusion this system configuration to replace the original Japanese brand configuration, are much higher cost performance as a whole, the failure rate is far lower than the original configuration. Batch used for more than a year now, the system stability is strong, user operation is simple, easy maintenance, received the affirmation of the user.
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