Packaging machinery

ABSTRACT: Special film production equipment and its auxiliary equipment are scattered and have many control points, and the main control cabinet is usually far away from the field equipment. If the traditional control method is adopted, the system cost will be high, and a large number of control and connection cables will be needed. It is difficult to wiring, low precision and easy to be disturbed by external electromagnetic interference. The interface module of CPU313C-2DP+Uygur UN 260 Profibus is proposed. The results show that this control scheme can effectively reduce the system cost, reduce the project installation and commissioning cycle, improve the operation accuracy and efficiency of the equipment, and reduce various external signals (operation buttons, sensors, etc.) to the control cabinet due to poor wiring. Faults caused by these factors have reduced the equipment failure rate, increased production output and achieved higher economic benefits.

Keywords: interface module UN 260 Profibus_DP remote I/O low cost high speed field device monitoring

1. System overview:

Special film production equipment is composed of high precision screw extruder (more than 30 PID temperature control zones, pressure control, etc.), traction, stretching (heating control), finalization (heating control), winding and related auxiliary equipment. Due to the particularity of production process, the requirements for the operation accuracy and stability of equipment are very harsh. . The whole production equipment is more than 60 meters long and about 2 meters wide, and it needs a lot of auxiliary equipment - - water treatment, heat conduction oil heating, air compressor and so on.

1: High precision screw extruder of main equipment is mainly temperature and pressure control. Because the field equipment is far away from the control cabinet, up to 30 channels of thermocouple temperature measurement signal, 6 channels of pressure signal, plus the field operation button signal, etc., if the traditional method is used to connect the signal line to the temperature measurement of the sensor to the control cabinet And analog data acquisition module has many disadvantages.

A: material, cable, installation, installation and commissioning costs are very large, one-time investment is large, is not conducive to secondary development, the system price is relatively low;

B: the signal is easily interfered by the external high frequency signal such as frequency conversion servo motor and so on.

C: the sensor signal line is far away from the control cabinet, all kinds of signals in the transmission process have a certain loss, resulting in the final measurement results are not accurate, low reliability.

The following is the host interface monitoring screen:

1) main screen

2: the traction part is controlled by frequency converter and motor, mainly for speed control.

3: stretching and shaping are mainly composed of transmission and electric heating control.

4: the winding part;

Two: project application configuration:

1: MT8100IH 10 inch industrial touch screen

Function: process parameter setting and monitoring of production line.

2: SIEMENS S7-300 PLC CPU313C-2DP

Functions: logic control, data processing and communication.

3:UniMAT CPU 226

Function: Mainly realize that the auxiliary equipment can still pass through the intelligent slave station (UniMAT CPU 226 + EM277) when the main station CPU fails.

It controls.

4:UniMAT IM260 PROFIBUS DP remote IO communication interface module

Functions: Using this interface module to realize high-speed and high-precision acquisition of field equipment signals, send them to the main station CPU, and respond to the main station CPU pair

The output control of field executor and so on;

5:UniMAT UN231-PL22 high density thermocouple temperature measurement module

Function: collect site temperature signal through IM260 communication interface module to master station CPU.

6:UniMAT UN 221-1BL22 high density digital input module

Function: collect on-the-spot operation button, proximity switch, photoelectric switch and other switch signals.

7:UniMAT UN231-0HC22 Analog Input Module (This Module has strong anti-jamming capability, supports gain-free correction, and uses poles

Its convenience)

Function: collect 4-20mA pressure signal and infrared temperature sensor signal

8:UniMAT CPU 226 UniMAT UN223-1PL22 digital input and output module, UniMAT UN222-1HF22 number

Word Output Module, UniMAT UN221-1BF22, Digital Input Module, UniMAT UN235-0KD22 Analog Input and Transmission

Output module

Function: mainly responsible for control of pumps and valves of water treatment equipment.

The PROFIBUS-DP interface module (IM260) has the following characteristics:

Support S7-300 and S7-400 PLC with DP master function.

RS-485 communication baud rate from 9.6Kbs to 12Mbs adaptive

Maximum support for connecting 99 DP slave functions

The RS-485 terminal adopts photoelectric isolation technology with over current protection.

The power supply has reverse connection protection and surge absorption function.

1: Siemens S7-300 CPU 315-2DP as the master station, IM260 interface module as the slave station, just need to import the module GSD file into step 7 Programming software, configuration programming is very simple and convenient.

2: Profibus_DP interface module IM260 can be extended up to 7 digital analog I0 extension modules, which can be extended with the high cost of 100 million-dimensional UN200 series PLC module, can also be extended with Siemens S7200 module, can also be mixed cross-use.

3): the actual use of the map:

Three: concluding remarks

This film production line uses Siemens S7-300 PLC which is stable and reliable as the main station. Various signal acquisitions are carried out through the series expansion modules of IM260 profibus+UN200. The function of this project is completely equivalent to S7300 PLC+ET200(x), but the price is much lower than S7300 PLC+ET200. It is very effective to reduce the cost and reduce the cost. With less installation and debugging time, the signal is stable and accurate, because the Uyghur UN260 Profibus network interface module has a strong expansibility, which provides convenience for the upgrade and transformation of equipment in the future, and has a high cost performance.

The commissioning of the equipment has been running steadily until now, and there has not been any problems.

Abstract: This paper introduces the application of UniMAT PLC on the non-woven slitter. Non-woven fabric cutting machine is a kind of equipment for cutting wide material according to different needs in the production process. Non-woven fabric slitter is mainly used to slit wide coil into various narrow coil suitable for production needs. Slitting process includes two processes: unwinding material and winding material. Tension control of unwinding material and winding material is the key link of the striping machine. The machine is based on the original electronic control system to add automatic edge control, achieved the desired effect, improved machine performance, so that the machine in high-speed operation more stable, winding flat, simple and convenient operation, safe and reliable, durable.

Keywords: UniMAT PLC, automatic control, slitting machine

1 Introduction

Non-woven fabric cutting machine is mainly used for cutting edge of non-woven cloth and other wide coil. The paper tube diameter is 75, the non-woven cloth outer diameter is 600, the length is 1600, non-woven cloth base material non-woven cloth, cut into actual size of several rolls, the narrowest can be cut to 18.

2 working principle

The system is composed of several parts, such as billionaire PLC, magnetic powder brake device, tension sensor, rectifying device, angular displacement sensor, traction spindle (driven by servo motor), two servos driving A-axis B-axis winding and cylinder respectively. The traction spindle and the magnetic powder brake device transmit the nonwoven fabric with constant tension. The deviation correction device is responsible for the deviation correction during the operation of the nonwoven fabric. The spindle is controlled by position mode and the AB shaft is limited by speed in analog torque mode. The speed and torque are adjusted continuously to achieve synchronous winding and control the strength of winding. The whole system is precise, stable and reliable. It adopts PLC intelligent design and has powerful functions, such as automatic zero stabilization, digital display, over-limit alarm, transducer output, current regulation output or time proportional output. As follows:

3. system composition

(1) rack part

It is welded by thick steel plate.

2) winding up part

There are two coiling A and B shafts, both driven by a 5KW servo motor and three inch inflatable shafts, and the speed of A and B shafts can be adjusted separately.

3) unwinding part

The 3 inch bloating reel and tension sensor and magnetic powder clutch are used to control tension.

(4) cutting part

The knife can be manufactured with either an industrial blade or a flat blade (artistic blade), and the knife pitch can be adjusted between 18mm and 1600mm.

(5) host part

The spindle adopts 5 KW servo motor.

(six) guide roller part

The whole machine adopts chrome plated steel pipe, each of which is treated by dynamic balancing.

(seven) electrical part

It is composed of billion-dimensional PLC system (224 CPU, 16DI/16DO, 8AI and 2AO), HMI system, low-voltage electrical appliances, sensors, actuators, etc. One billion PLC system configuration is shown in table 1..

Table 1: configuration of PLC system:

Compared with the similar products on the market, the Uyghur CPU224-2Q has the following outstanding features: adding additional PPI communication ports, eliminating the trouble that customers can not use touch screen and programming cable communication ports at the same time, and can only plug and unplug ports constantly; no batteries, power-down data can be provided for up to 10 years to maintain; faster command execution speed A single Boolean operation instruction is three times that of a similar Siemens product; it is compatible with the Siemens S7200 instruction set; it can directly replace the Siemens 224 controller module. The appearance of UniMAT CPU224 product is shown in Figure 2.

4 control process

A. the system is divided into two parts: manual and automatic. When wearing non-woven fabric, switch the system to manual mode. Spindle, A axis and B axis can be moved. When the nonwovens are finished, everything is ready, and click the button to run automatically. Speed range 0--150m/min.

B. length and fixed length function. The counter-length is installed on a guide cloth stick with a code plate. The high-speed counter is used to realize the function of counting length. The real-time length is displayed on the touch screen. Fixed length, set on the touch screen to cut the length of non-woven fabrics, when the length of the set length, the sound and light alarm to remind the operator.

C. tension control. Actual tension and setting tension touch screen display. The tension control is composed of a tension sensor and a magnetic powder clutch. The tension sensor detects the current tension, compares it with the set tension, and controls the unwinding device by controlling the suction degree of magnetic powder clutch through the deviation, thus realizing the constant tension control. Control tension accuracy: + / - 5N.

D. coil diameter control. The roll diameter control function is realized by angular displacement sensor, and the rolling diameter is 100mm--1200mm.

E. synchronous control. The synchronization of spindle and A axis B is the core of the system, which affects the quality of finished products. The A axis and the B axis are swinging up and down from the cylinder control, or they can be stopped at any position in the middle. The speed of the spindle is set according to the on-site technology, starting with the A and B axles down close to the spindle, at this time the coil diameter is the smallest, the speed is the fastest. With the increase of coil diameter, the torque of A and B axis increases slowly, and the speed is slower and slower. When the spindle is accelerated or decelerated, the speed of A and B axes will increase or decrease correspondingly to keep the spindle synchronized.

F. main technical parameters:

1) supply voltage: 220V/380V, 50/60Hz

2) effective width of cut 18: -1600

3) production speed: 0--150m/min

4) spindle power 5KW; A axis power 5KW; B axis power 5KW.

5 system effectiveness

The main effects are: winding, trimming, and solid. As shown in figures 6 and 7:

6 concluding remarks

The application of billion-dimension PLC in the system of non-woven fabric cutting machine shows the high compatibility with Siemens PLC and the excellent characteristics of stable performance. It can completely replace Siemens products and reduce the production cost of the manufacturer while ensuring the stability of the products.

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