Abstract : This article takes Dianbing City Chuangxian Technology Co., Ltd. as an example to introduce the successful case of the company's automation control program using Yudian Automation Technology Co., Ltd. and describes in detail the system configuration, application functions and other aspects. It proves that Yudian's automatic control scheme is reliable, easy to operate, and has strong anti-interference properties. The industrial automation level of polyurethane resin production has once again reached a new level.
Keywords: Automation Control, Flow Totalizer, AI-DCS
1. Project Overview
Diaobingshan Chuangxian Technology Co., Ltd. is a technology enterprise that produces polyurethane shoe soles, synthetic leather polyurethane resins, polyester polyols, and thermoplastic polyurethane resins. In order to achieve quantitative control at the time of feeding, and ensure the quality of the product, the company adopted the automation control scheme provided by Xiamen Yudian Automation Technology Co., Ltd. in the production process of polyurethane resin, namely "AI meter + RS-485 bus + PC monitoring software. "To a large extent, the stability, operability, and expandability of the resin reaction system have been improved. The practical application of this system can provide a highly cost-effective automatic control solution for domestic polyurethane resin manufacturers.
System Configuration
2.1 Instrument Configuration
The main technical features of the above instruments are:
AI-708HAI4L1L1S, multi-function flow totalizer, current signal input, including 24VDC current output, relay contact switch output, with optically isolated RS485 communication interface.
AI-518AL1L1S, 0.25 level accuracy, with adjustment, display, transmission, communication and other functions, dual relay contact switch output, with optical isolation RS485 communication interface.
AI-3011D5, 10 way switch input with RS485 communication.
AI-3013D5, 8-way switch output with RS485 communication.
AI-DCS network software V9.0, Yu-Electric Control Configuration Software, which is used together with Yu-Electric Instrument to form the instrument field bus system only. The communication method is RS485. The instrument adopts AIBUS communication protocol to complete the data collection of the universal workstation. And processing, real-time and historical data processing, instead of the labor of a large number of on-site staff and the completion of the monitoring of the child's pine, can print various reports at any time or at regular intervals.
2.2 System Composition
The automation system is mainly composed of three parts: "AI-DCS Network Software + AI Series Smart Meter + Computer". The system structure is as follows:
2.3 Customer Application Function Description
2.3.1 Process Requirements
(1) The batch control function of the AI-708H Flow Totalizer can be fully operated on the computer to charge all 3 reactors quantitatively. (2) Record the temperature of the reactor bottom and the kettle (using the AI-518 temperature controller) and the reaction of the polyurethane in real time. (3) Record and save all data for future inquiry. (4) Real-time data provisioning time query. The reactor history data for the reactor will provide "kettle number" and "lot number" queries. (5) Provide real-time curve, real-time alarm and alarm limit modification. (6) Provide operating authority and settings to prevent misoperation.
2.3.2 Operation Description:
How to operate the AI-708H Flow Totalizer on the software for the quantitative control of the feeding of the kettle. When the communication status of the AI-708H meter indicates “communication is normalâ€, the meter and computer are connected properly. (1) Batch control data reset in the batch console resets the set value data of the AI-708H instrument and resets the feed relay to initialize the instrument. (2) Use the digital control function of the AI-301M module to open the high-pressure electric ball valve of the kettle so that the pipeline will be open and the valve will turn green. In the middle yellow box, there will be corresponding data display in the operation bar, as well as a "Reaction Start" button.
(3) Immediately after the completion of feeding, click "Reaction Start" and the database will record the current feeding data and reaction start time of the kettle. The data will be displayed on the reactor at the same time and the "End of Reaction" button will appear. (4) If necessary, please click "Batch Control Data Reset" to reset the data of the batch control table (AI-708H) to zero. The small valve opens the high pressure electric ball valve of the kettle and then sets the "batch control given value". Then click on "Feeding."
(5) After the feeding is completed, click the button “Feeding Records†to record the data for re-feeding. (6) Immediately after the completion, click "End of Reaction" to record the time at which the reaction ends, so that the data curve can be queried later. One polyurethane resin production to this kettle is over.
3. Conclusion
The current customer has entered the debugging phase. AI instrument and field bus AIDCS computer monitoring system are reasonable in terms of software and hardware design, reliable operation, convenient operation, and strong anti-jamming capability. It is a polyurethane resin in Tingbing City Chuangxian Technology Co., Ltd. During the production process, the site is running well, which greatly increases the production efficiency of polyurethane resin and makes its industrial automation level leap to a new level.