火箭vs快船 www.wxork.club EC20 PLC在火箭vs快船控制系統中的應用，以及該產品PID閉環功能在恒溫控制上的實現和強大的網絡通信功能對艾默生EV2000的變頻器運行控制。實現了對室內溫度和變頻器運行的集中控制。 EC20 PLC在火箭vs快船控制系統中的應用并著重介紹該產品的PID閉環功能在恒溫控制上的實現和強大的網絡通信功能對EMERSON EV2000變頻器運行控制的實現。該火箭vs快船控制系統是家電，電子，電腦行業產品生產檢測的重要設備，也是產品生產合格檢查的重要環節。該系統采用EMERSON EC20 PLC和多臺EV2000變頻器，實現對室內溫度和變頻器運行的集中控制。
The application of EC20 PLC in the control system of aging room, the realization of PID closed-loop function in constant temperature control and the strong network communication function of the product control the operation of Emerson EV2000 converter. The centralized control of indoor temperature and frequency converter operation is realized. The application of EC20 PLC in the control system of aging room and the realization of PID closed-loop function in constant temperature control and strong network communication function in EMERSON EV2000 frequency converter operation control are emphatically introduced. The aging room control system is an important equipment for the production and inspection of household appliances, electronics and computer industries, and also an important link for the product production qualification inspection. The system uses EMERSON EC20 PLC and several EV2000 frequency converters to realize centralized control of indoor temperature and frequency converter operation. 二、 火箭vs快船控制系統工藝要求
II. Process Requirements for Control System of Aging Room
Specific requirements are as follows:
1. The area of the aging room controlled by the system is 16 *30M, which requires the control range of 20-55 C and the control precision of <5 C. The system can set/display/save the temperature on the host computer; (The humidification control is independent of PLC.)
2. The system has three fans for air intake, return and exhaust; four air gates: fresh air gate, return air gate, exhaust air gate, fire gate; two dust-proof filters; six fire alarm points;
Under normal conditions (temperature and humidity), close the intake valve and exhaust valve, stop the intake motor and exhaust motor, open the return valve and fire valve, start the return fan, and maintain the return air circulation in the aging room.
At high temperature, the exhaust valve and the intake valve are opened, the exhaust motor and the intake motor are started, and part of the air is drawn out.
In the case of fire alarm, the fire valve is closed, the return air is forbidden to circulate, and all the air is drawn out from the room. At the same time, the exhaust valve and the intake valve are opened, and the exhaust motor and the intake motor are started to extract the indoor air.
3. Working Principle:
根據老化房工藝要求組成如上圖控制系統：上位機采用臺灣研華IPC（工控計算機）；監控畫面采用亞控公司的KINGVIEW軟件，該軟件操作簡單，元件形象豐富，性能穩定；核心控制部分采用EMERSON EC20-2012BTA類型的PLC和4個溫度采集?？椋‥C20-4TC，接受K型溫度信號）；傳動采用EMERSON EV2000通用型變頻器。
According to the technological requirements of the aging room, the control system is composed as follows: the upper computer adopts Taiwan Yanhua IPC (industrial control computer); the monitoring screen adopts KINGVIEW software of sub-control company, which has simple operation, rich component image and stable performance; the core control part adopts EMERSON EC20-2012 BTA type PLC and four temperature acquisition modules (EC20-4TC, which receives K-type temperature signal); EMERSON EV2000 universal frequency converter is used.
在設備連接方面，EC20 PLC充分體現了自身的優勢，由于EC20 PLC本身帶有2個串行通信口（1個RS232口，集成自由協議/編程協議/MODBUS從站協議，1個RS232/485口，集成自由協議/MODBUS主站/從站協議），EC20 PLC利用COM0口和IPC進行通信（EC20 PLC做從站，設置成MODBUS從站協議），利用COM1和多臺變頻器組成網絡進行集中控制（EC20 PLC的COM1設置成MODBUS主站協議）。
In terms of equipment connection, EC20 PLC fully embodies its own advantages. Because EC20 PLC itself has two serial communication ports (one RS232 port, integrated free protocol/programming protocol/MODBUS slave protocol, one RS232/485 port, integrated free protocol/MODBUS master/slave protocol), EC20 PLC communicates with IPC using COM0 port (EC20 PLC as slave station, set up as MODBUS slave station protocol), EC20 PLC has advantages. COM1 and several inverters are used to form a network for centralized control (COM1 of EC20 PLC is set as MODBUS master station protocol).
IPC is the man-machine interface of the whole system. IPC reads the operation status of the system collected by PLC, such as the operation status of each fan, temperature of each temperature measuring point, alarm status and display on the monitoring screen. IPC transmits various operation commands to the PLC to control the operation of the system, such as temperature setting, PID parameter setting, valve opening and closing, frequency converter starting and stopping, etc. And it can real-time monitor the working state, action process and fault alarm of the whole system. IPC can also save and print the collected data according to the setting.
在系統設計中，EC20 PLC為整個系統的核心，執行各種系統操作及計算，EC20 PLC根據工藝要求和現場狀況進行邏輯判斷，開閉各種閥門和啟停各風機；同時利用自身的PID功能對溫度進行控制，具體方法后面描述。
In the system design, EC20 PLC is the core of the whole system. EC20 PLC carries out various system operations and calculations. EC20 PLC makes logical judgments according to process requirements and site conditions, opens and closes various valves and starts and stops various fans. At the same time, it uses its own PID function to control temperature. The specific method is described later.
The communication unit of EV2000 series frequency converter with RS485 interface conforms to RS485 communication specification, and is used to realize the interconnection of PLC and multiple frequency converters. According to MODBUS communication protocol, we can easily control the operation of frequency converter through RS485 network. Because of the long transmission distance, simple wiring, strong anti-interference ability and high reliability of RS485 communication link, we omitted the external start-stop control circuit of frequency converter in the design. All the control of frequency converter is accomplished through RS485 communication link, which achieves the goal of economy and efficiency.