Third, the system requirements
1. Real-time monitoring of the temperature and humidity of the ammunition store, ensuring the storage temperature and humidity requirements of the ammunition, and controlling the automatic operation of the air conditioner.
2. The system can classify the alarm according to its nature and importance level, complete the corresponding processing work, and record the alarm.
3. With flexible query function and powerful report function, it organizes and analyzes historical data and real-time data of equipment operation.
Fourth, Yudian solution
1. According to the characteristics of the air-conditioner compressor, the opening/stopping cannot be continuously operated, and the high-low pressure refrigeration pipeline of the compressor must be balanced before the characteristics of the air conditioner can be restarted.
Instrument selection:
The AI-702MFJ5L2L2S instrument is used for single-sided back-position control.
Select J5 module 2 channel transmitter 4 ~ 20mA input, including 24V power distribution.
Select L2, L2 module 2 relay output control air conditioner, dehumidifier start / stop.
2. Use the photoelectric isolation converter AI-485G to be responsible for serial communication.
3. PC software: using the monitoring software AIDCS For NET V8.0 online version.
4. Adopt Osong high-precision, temperature and humidity sensor transmitter (output analog signal).
5. Adopting IPC610, Advantech IPC.
6, using a 16-port ten hundred megahertz adaptive hub.
7. Adopt 100M multimode fiber transceiver. A four-core cable is used.
Five, parameter settings
In each temperature and humidity control instrument, the upper window displays the humidity and the lower window displays the temperature. The air conditioner and dehumidifier can be automatically controlled after the temperature and humidity control instrument parameters are set. If the humidity is higher than 80%, the machine will start at less than 70%.
parameter settings:
The control range of temperature and humidity is: upper limit absolute value alarm value HAL value minus return difference dF value is the control range. For example, the humidity 80-10=70 humidity control range is controlled between 80% and 70%. In other words, to change the upper limit absolute value alarm value HAL value and the return difference dF value, the control range can be changed to achieve automatic control.
Six, on-site installation A protective box is installed on the wall of each ammunition warehouse buffer room to assemble temperature and humidity control instruments.
2. In the control room, a RS485 communication line is installed as a warehouse field controller to connect the field communication bus to the computer.
3. Install a 16-port 100-megabit hub and a 100M multimode fiber transceiver to lay a four-core cable.
Seven, software functions, structure
The AIFCS network version monitoring software is installed on the computer, and the internal structure of the field controller is 100% functionally implemented on the computer using a simple and reliable self-contained communication protocol. The internal structure can be divided into the following three parts. : Data acquisition, data processing, authority management ◠Data collection: The system collects real-time data such as measured values ​​and equipment status values ​​from the warehouse site temperature and humidity controller, and stores them in the system to read the database for future data query.
â— Data processing: The system extracts data from the historical database according to user requirements and completes the specified processing functions, including historical data display, historical curve drawing, reports, alarms, and so on.
â— Privilege management: The user defines the system's permissions and operation passwords, which are suitable for each management layer to have different operation rights.
Eight, management
After setting up the computer IP address or computer name of the management computer input control room and the network test of the control room network server in the established local area network, the real-time animation flow chart shape, data, report and curve exchange can be performed on the management machine after setting the permission. All parameters of the warehouse site controller are modified. Operate on a LAN computer as a control room computer, transfer data in real time, complete data sharing, and achieve 100% operation on the network. The specific operation is the same as the control room computer.
Nine, system operation and user evaluation
1. Stable and reliable real-time full-range monitoring; automatic inspection, automatic fault alarm, fault location; automatic recording and generation of various reports; system self-diagnosis.
2. This system has advanced technology, open system, easy expansion, stable and reliable, can run independently, is easy to network, and easy to program.
3. Centralized monitoring, centralized maintenance, and centralized management. The system has been in operation for three years in the coastal ammunition depot. The site has been appraised and evaluated, which plays a key role in the safekeeping of ammunition. The monitoring system has been fully promoted and applied.
Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn
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