【Abstract】Contents of this paper is a cold pad batch dyeing equipment PLC control system on the redesign. The transformation of the old machine control systems into the popular split control. There are two aspects， one PLC reconstruction， the second is a touch screen transformation. PLC terms with a new model， with a SiemensS7-300 series PLC to replace discontinued C7-626 series. Touch screen aspect rewrite configuration interface program. After transformation， cold pad batch dyeing machine monitoring system greatly enhanced reliability， improved system stability and reduce the cost of spare parts， easy to buy， improve the performance of the entire automation and control equipment.

【Key words】Dyeing Machine； PLC； Touch Screen

0 Background

On certain textile dyeing and finishing equipment uses Siemens old models of C7 series one machine as the control system. Due to the use of a longer， controllers frequently downtime and it also comes with a touch screen panel serious aging， whats more， environmental humidity and corrosion dye， connection is also poor contact between the controller and the external device， the control system is often caused by faulty shutdown， which seriously affects the work plan. In order to change this situation， Monitoring systems need to be upgraded again.

（1）To develop new monitoring system overall scheme， PLC and touch screen section.

（2）PLC part upgrades， Hardware part is mainly hardware selection， And on this basis to upgrade the software section.

（3）Configuring programming interface touch screen.

（4）Overall system simulation debugging.

1 Design

Fig.1 Overall structure diagram

Fig.2 Hardware configuration

PLC selects Siemens S7-300PLC， CPU model is 315-2DP， increase high-speed counter module FM350-1， touch screen choice TP 170B. Between the touch screen and PLC via MPI communication. The original system of modular I/O station ET200 and some of the inverters， which is used to collect some of the number of switches and analog information， through the inverter to control the motor operation. Because the industrial site is far away from control cabinet， they can be connect by Siemens Profibus-DP fieldbus and PLC， finally， through the touch screen monitor.

2 The Configuration Interface Design

2.1 create a variable

Detected by the address corresponding to the address before the establishment of the variable.

2.2 interface design

Open WinCC Flexible， selecting Siemens Touch screen models build projects. Open the template interface， And in the upper right to join a I / 0 field， which is used to monitor the actual value of the vehicle speed， so each picture can be displayed the variable.

Pressure setting screen as an example to illustrate the steps of detecting the address：

（1）Founding pressure setting interface and changing the setting pressure of the left， the input setting is 15， Fig.3：

Fig.3 Touch Screen of All-in-one Machine

（2）Loading original system uses the PLC program STEP7 software， then opening the online monitoring.

（3）Opens each of the DB， when modify parameters on the touch screen，Is there a change in the variable view open DB block， if you find a corresponding change， record corresponding to the address of the variable DB.

3 System Simulation Sebugging

When you have finished touch screen interface and PLC program， In the simulation page PLCSIM， opening the variable monitoring. After the touch screen interface to be written， You can also start the operating system， Thus changing and monitoring the value of the variable. The following dye proportion interface takes setpoint dye proportion for example to describe the debugging process.

（1）Open the completed project in the STEP7 and open the emulator PLCSIM， then select the SIMATIC 300 station and click to download. Fig.4：

Fig.4 PLMSIM SIMULATION

（2）Open the WinCC Flexible software， open the variable from the left and Find setpoint dye proportion corresponding PLC program addresses， DB10 DBD376， Meaning that corresponds to the data block DB10 PLC program at address 376.

（3）Click on the upper left corner to start the operating system， dye proportions interface is switched to open， change the setting dye proportion， while the margin of error is set to 0， observe the changes in the actual value， You can find the actual value will change as well as setpoint changes， until it stabilizes the set value.

（4）At the same time open the PLC program DB10 and address 376， wearing glasses for monitoring， setpoint values are also found along with an on-screen changes， It also verified the correspondence address before come to the right， Address on the touch screen and PLC correspondence address.

4 Summary and Outlook

It is expected to transform the Cold pad batch dyeing machine monitoring system in the future， Its performance will be greatly improved， Enhanced anti-jamming capability， Man-machine interface more intuitive and flexible operation. Since Siemens software has good simulation capabilities， what we did is upgrade test by simulation software， its function fully meet the actually demand. Simulation test passed， the system on the actual equipment were also tested， Test results completely normal.

【References】

[1]Rupp， Jurg.Recent Developments In Dyeing[J].Textile World， 2010， Vol. 160（2）：36-37.

[2]Wang Hai yan.Bai Xu Spilled-dyeing machine network control system based on industrial Ethernet[J].Electronic Instrumentation Customer，vol.03， 2006：23-25.

[3]Wang Haiyan etal. Application of Profibus-Dp Field bus in Batch Dyeing Machine Control System[J].Journal of Textile Research.vol.06， 2004：30-32.

[4]SIMATIC S7-300 Multipurpose PLC Technical Manual， 2008[Z].

[5]SIMATIC HMI WinCC flexible 2008Compact/Standard/Advanced System Manual， 2008[Z].

[6]WinCC flexible Manual.2008[Z].

[責(zé)任編輯：王楠]