Xiamen Yudian instrument business contact; Wang Gong,
Overview
Xianglu polyester spinning fiber HDT-3T machine fieldbus temperature control system adopts AIBUS fieldbus overall design, with AI-2000 industrial touch screen computer as host computer, multiple AI regulators are connected on site through AIBUS communication protocol, touch screen computer Directly communicates with AI controller through RS-485 serial communication to achieve centralized monitoring of 90 channels temperature. All the parameters on the AI ​​controller can be displayed on the touch screen, or can be set and downloaded using a touch screen computer. The data display has a high refresh rate to facilitate real-time monitoring with a temperature control of ±0.1°C. The system monitors four drawing lines at the same time.
Process process requirementsIn the production process of polyester spun fiber, each polyester draw wire HDT-3T false twisting machine has 45 heating cylinders to store biphenyl heat medium in liquid phase and gas phase. The required controlled temperature-controlled heating zone has 45 liquid phases in total. , 45 gas detection points, in order to change the physical properties of polyester filaments, need softening process, heating control in the heating cylinder of polyester drawing HDT-3T false twisting machine to soften the filament to create pull conditions, Different filaments pull different softening temperatures. Because the original machine temperature control system is old and the control quality is not high enough to meet the requirements of the process, the existing temperature control system of the T machine is planned to be transformed. Each T station false twister has 45 heating cylinders, divided into two layers. : The lower layer of the biphenyl heat medium liquid phase heating control output drives the SSR to the heating tube, the upper vapor phase 45 monitors, and each T control system has 90 channels. The communication between the AI ​​controller, AI patrol meter communication table and the AI-2000 LCD touch-type industrial tablet computer has been transformed through the system to realize centralized control. A touch screen computer can communicate with 90 measurement and control points at the same time. The communication method is RS-485 serial communication. In this way, the control information and data information in all temperature control tables are managed and distributed on the touch screen computer.
System composition The system structure is as follows:
control system
The entire measurement and control system includes AI-2000 touch screen computer, AI regulator, platinum resistance PT100, SSR solid state relay, and electric heating tube.
The touch screen computer uses Yu Electronics AI-2000 industrial touch screen computer (TOUCH PC), not only can run WINDOWSCE, LINUX and other embedded operating systems and software, but also can run WINDOWS 98 and other PC operating systems and software, applications are flexible and able to Completely replacing paperless recorders, human-machine interfaces and other products. The display adopts 10.4-inch TFT true color LCD screen. With the touch screen operation, the display screen is intuitive and clear, and the operation is simple and convenient. At the same time using CF electronic disk to solve the problem of common hard disk intolerance vibration, can be applied to the industrial scene. It has one RS232 communication port, one RS485 communication port, one parallel printing port, one USB port, one PS/2 mouse port, one keyboard port, one RJ45 Ethernet port.
The touch screen computer is equipped with AIFCS product, which can be directly used without the need of system configuration. This software and Yuguang instrument are used together to form a smart instrument field bus system. The instrument and the software supporting the instrument are AI708. AI708M, a total of 90 channels. The parallel port on the touch screen computer can also be connected directly to the printer for real-time or scheduled printing of current or historical data. Use the built-in RS485 communication port on the touch screen to communicate directly with the AI708 and AI708M temperature control tables. Communication mode RS485; Instrument adopts AIBUS communication protocol, 8 data bits, 1 or 2 stop bits, no parity bits, 16-bit sum check for data, and its error correction ability is tens of thousands times higher than that of parity check. , can ensure the correct and reliable communication data.
The temperature control instrument selects Yudian's AI series instrument with communication function. This instrument adopts AI artificial intelligence adjustment method. It is a new type of algorithm that uses fuzzy rules to adjust PID. When the error is large, fuzzy algorithm is used to adjust to eliminate PID. The phenomenon of saturation integration, when the error is becoming smaller, the improved PID algorithm is used to adjust, and some features of the controlled object can be automatically learned and memorized in the adjustment to optimize the effect, with no overshoot, high precision, and simple parameter determination. , For complex objects can also get better control effects and so on. The overall adjustment effect is better than the general PID algorithm and fuzzy adjustment algorithm.
Main function description
The system consists of a two-layer structure of upper computer (industrial pole touch screen computer) and lower computer (Yuguang AI smart meter): the upper computer is responsible for monitoring, processing, and supporting the data of all the smart meters connected to the field device; the lower computer ( Yuguang AI smart meter) is responsible for the data acquisition of field devices and controlling the normal operation of field devices.
Field equipment real-time data acquisition and preservationAt the same time, the real-time data of the thermal resistance (PT100) of the 90 channels of the machine is collected, and the values ​​and states of all instrument data are displayed on the same screen, and the data is saved as a file for historical data storage at the same time.
According to the customer's technological process, the layout of the virtual field device is displayed on the screen, the online state of the dynamic display device, and the corresponding labels and data are marked on the actual installation position of the sensor and other related devices, so that the user can understand the screen more intuitively. The actual source of the data on the incident can improve the efficiency of solving the accident when the accident occurs.
Equipment alarm generation, processing, preservation and queryThe system sets the alarm generation time, form, length and release method according to the customer's requirements, and performs the alarm in real time quickly and accurately. And save the alarm type, alarm time, response time, end time of each alarm, real-time data after the alarm, the operator, etc., the information the customer needs, and the query of the alarm data can facilitate the accident analysis of the customer.
After the real-time data is saved as a file, the data can be queried on the historical data query screen, and the customer can easily call up the data comparison and data analysis, so as to learn more experience to control the entire system and improve the production efficiency. The data can also be saved as a file that can be opened by Excel. It can be copied to other IPCs using a USB port for backup.
Real-time curve and history curve displayThe curve function makes the display of the data easier to understand and also shows the data trends of both the gas phase and liquid phase sensors, making the product quality easier to control. Real-time curve, history curve switching and powerful curve query function make the use of the curve more convenient and flexible.
Unified setting and separate setting of internal parameters of multiple smart metersAt the same time control the start, stop, alarm limit, and instrument set value of all the instruments to set, and you can also set the parameter values ​​of a single instrument arbitrarily, so that the upper computer auxiliary control becomes fast and accurate.
Authority management for operatorsThe system login mode is divided into system startup login, login during system operation, and login when exiting the system. Permissions are graded according to customer requirements to prevent irrelevant operators from mishandling and causing accidents. Setting administrator privileges allows users to add, delete, assign permissions, and change passwords while the system is running.
ConclusionThis system has been successfully run by Xiamen Xianglu Polyester Spinning Fiber (Xiamen) Co., Ltd. for more than 3 years. The on-site operation is based on the AIFCS computer monitoring system of AIBUS fieldbus and AI-2057C industrial-grade touch screen computer, both in terms of software and hardware design. It is more reasonable, reliable, easy to operate, and has strong anti-interference, which greatly improves the production efficiency of the company and makes its industrial automation level leap to a new level.