Article in PLC and frequency in volume, and the application of the electric control volume

In PLC, frequency in the volume, and the application of the electric control volume jingwei textile machinery Han Baoli Liu Chong welcome to e/packaging machinery exhibition hall hall hall 7 watts line coating machine, box making machines, paste box machine, nail box machine, automatic gluing machine, compound machine. 。 。 Abstract: the paper introduces the da ES series PLC, as well as VFDS - Article B of the transducer and the man-machine interface in volume, and the application of the electric control volume. Key words: PLC; Frequency converter; Touch screen 1. The introduction in ES series programmable controller ( PLC) With compact appearance, good extensibility and operation function, so this series PLC controller can meet the demand of a variety of automatic control, and combining with VFDS - with price advantage B of the transducer and PWS500S screen apply, in the user's actual industrial automation solution, has a strong adaptability. 2. Article volume, and the electric control system, composed of the following: as shown in the above electrical control system is mainly composed of programmable controller ( PLC) , display, inverter. PLC to complete all of the data processing and the whole machine process logic control. Display complete lap fixed-length, long booking class, output, yield, the volume velocity of process parameter setting and display, and have the function of fault alarm display. Inverter through the communication with PLC, the control of main motor at low speed, high speed, such as point move slow process requirement. Modular PLC software design of the entire program adopts modular design, different process action corresponding subroutine calls. According to the priority level subroutine call process, high real-time demand first call. 1) 。 Initialization program: the main data processing system. According to the set of process data, to be prepared for the inverter communication and parameter display by calculation, and the running data processing. 2) 。 Inverter communication program: according to the communication data format of frequency converter, the calculation of good data to inverter, complete the PLC data exchange with the inverter. In PLC and communication in frequency converter has special instructions, very convenient. 3) 。 Process action procedure: to complete the whole process of logic control, for example: start at low speed, high speed operation, originally intended to slow down, parking and automatic fixed-length ( Manual) Change of bobbin, etc. 4) 。 Fault handler: peripheral fault signal acquisition, temporal logic processing, fault information through light and touch screen display. To realize the safety of the whole machine stop action. Modular software design, greatly improving the operability and maintainability of the software, and the program structure has good extensibility. And according to different customer requirements, to meet user's personalized design. At the same time improve the competitive capability of product. Humanized display software development as the man-machine dialogue interface software design, fully consider the user's specific requirements, to switch between different picture convenient, improve the operability of the user. Mainly includes the following contents: 1) 。 The whole machine instructions. Including the whole machinery and equipment, equivalent to the help menu, the technology of machine instructions, matters needing attention in the form of a dialog box for the operator. 2) 。 Fault alarm and processing real-time shows the current fault information, at the same time, according to the time sequence statistics out of the recent emergence of fault information, helps users analysis of failure. The common electrical failure problems proposed solutions are put forward. As far as possible to improve the efficiency of troubleshooting. 3) 。 Setting and display of data. Parameters include frequency, fixed-length, due to long, the speed of the car, High speed and low speed) And so on. Parameter display including: meter long, class divisions, production, output, roll speed, fault information, etc. At the same time using stick figure and the curve graph vividly show various state information. 4) 。 Password function. The initial password provided to the user in the machine installation and debugging. Users can set different levels of password changes, to protect the user to the uniqueness and accuracy of the process parameters. 5. The use of frequency converter used in VFDS - B series frequency converter, through the RS485 mouth receive PLC data. For example, control ways, deceleration time, operation frequency, etc. Control the operation of main motor start at low speed, high speed, long due to slow down, fixed-length process such as parking movements. 6. Conclusion in ES series PLC, VFDS - The use of B series inverter, PWS500S display, provides users with reliable, cost-effective electric control system. In a large number of users in the practical application shows the stability and reliability of the system. References 1 in PLC application technical manuals. In the electronics industry co. , LTD. 2 sets of VFDS - B inverter user manual. Zhong da dentsu co. , LTD
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