This article takes the example of Diaobingshan City Chuangxian Technology Co., Ltd., and introduces the successful case of the company's use of the automation control scheme of Yudian Automation Technology Co., Ltd., from the system configuration, application functions and other aspects of the detailed description of the summary: As an example, Bingshan City Chuangxian Technology Co., Ltd. introduced the successful case of the company's use of the automation control solution of Yudian Automation Technology Co., Ltd., and detailed descriptions from the aspects of system configuration and application functions. The automatic control scheme is reliable, easy to operate, and has strong anti-interference. The industrial automation level of polyurethane resin production has leapt to a new level.
Keywords: automation control, flow totalizer, AI-DCS
1. Project Overview Tiaobingshan City Chuangxian Technology Co., Ltd. is a technology-based enterprise that produces polyurethane sole liquid, polyurethane resin for synthetic leather, polyester polyol and thermoplastic polyurethane resin. In order to achieve quantitative control during feeding and ensure the quality of the products, the company adopted the automatic 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 softwareâ€. The stability, operability and scalability of the resin reaction system are greatly improved. The practical application of the system can provide a cost-effective automatic control solution for domestic polyurethane resin manufacturers.
System Configuration
2.1 Instrument configuration
Introduction to the main technical features of the above instruments:
AI-708HAI4L1L1S, multi-function flow totalizer, current signal input, including 24VDC current output, relay contact switch output, with optical isolation RS485 communication interface.
AI-518AL1L1S, 0.25-level precision, with adjustment, display, transmission, communication and other functions, dual relay contact switch output, with optical isolation RS485 communication interface.
AI-3011D5, 10-channel digital input with RS485 communication.
AI-3013D5, 8-channel switch output with RS485 communication.
AI-DCS network software V9.0, Yu electrical control configuration software, the software and Yudian instrument supporting the use of the instrument field bus system, communication mode is RS485, the instrument uses AIBUS communication protocol, complete the data acquisition of the general workstation And processing, real-time and historical data processing, instead of a large number of on-site staff labor and complete monitoring of the scene, can print various reports at any time or at regular intervals.
2.2 System Composition The automation system is mainly composed of three parts, namely “AI-DCS network software + AI series intelligent instrument + computerâ€. 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 quantitatively feed all three reactors. (2) Record the reaction temperature of the bottom of the reactor and the temperature in 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 reference. (4) The real-time data provides time inquiry, and the feeding history data of the reaction kettle provides the query of “the kettle number†and the “batch numberâ€. (5) Provide real-time curve, real-time alarm and alarm limit modification. (6) Provide operational authority and settings to prevent misuse.
2.3.2 Operation Description:
How to operate the AI-708H flow totalizer on the software to control the dosing of the kettle. When the communication status of the AI-708H meter indicates "communication is normal", it indicates that the meter and the computer are connected normally. (1) In the batch console, “Batch Control Data Reset†clears the set value data of the AI-708H meter and resets the feed relay to initialize the meter. (2) The high-voltage electric ball valve of the kettle is opened by the switch quantity control function of the AI-301M module, so that the pipeline is unblocked and the valve is turned green. There will be corresponding data display in the middle yellow box operation bar, and there is also a “Reaction Start†button.
(3) Immediately after the completion of the feeding, click “Start of Reactionâ€, the database records the feeding data of the current kettle and the reaction start time. The data will be displayed simultaneously on the reactor and the “End of Reaction†button will appear. (4) If necessary, please click “Batch Control Data Reset†to clear the data of the batch control table (AI-708H). The small valve opens the high-pressure electric ball valve of the kettle, and then sets the “Batch Control Setpointâ€. Then click on "Feed".
(5) After the feeding is completed, please click the button “Feeding Record†to record the data of re-feeding. (6), please click “End of Reaction†immediately after completion to record the end of the reaction, so as to query the data curve in the future. The production of the primary polyurethane resin to this kettle is completed.
3. Conclusion
At present, the customer has entered the commissioning phase. AI instrument and field bus type AIDCS computer monitoring system are reasonable in software and hardware design, reliable in operation, convenient in operation, and strong in anti-interference. Polyurethane resin in Tiaobingshan Chuangxian Technology Co., Ltd. In the production process, the site runs well, greatly improving the production efficiency of polyurethane resin, and bringing its industrial automation level to a new level.
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