Abstract: This article introduces the application of V80 series PLC in the energy-saving industry. It focuses on the integration of V80 energy-saving PLC and GPRS, and gives corresponding plans for the whole plant energy-saving and lighting energy-saving. Keywords: PLC power factor GPRS DTU Related equipment and industries: energy saving lighting, energy saving in the whole plant, energy saving in injection molding machines, energy saving in air compressors With the vigorous development of China’s economy, the gap between the energy consumption per unit of GDP in China and the developed countries in Europe and the United States is increasing, which has aroused great concern from the central government. The 11th Five-Year Plan will “set up a sustainable energy efficiency target for the entire society. "And the effective adjustment of industrial structure in the direction of low energy consumption" is a top priority. At present, a considerable number of energy-saving plants, energy-saving street lamps, energy-saving building using energy-saving way, Deweisen company's V80 energy-saving special PLC - V80-C18DRMA-LD is precisely for the energy-saving industry developed a dedicated PLC. 2.1 The principle of the lamp energy saver is as follows: the voltage will fluctuate along with the peaks and valleys of the electricity. The street lamp will reduce the luminous rate when the input voltage is lower than UMIN and greater than UMAX, and the reactive power consumption such as line loss and lamp heat loss will increase. . A street light controller was introduced to detect the input voltage/current of the street light, and a reasonable control of the power supply of the street light was made so that the electric energy can be saved to the maximum extent. At the same time, the economizer also plays an intelligent control function. After the day is dark, the lights can be automatically turned on, and the street light grouping switch is performed according to different strategies. Because the latitude and longitude are different in different places, the dark time in winter and summer are also different. Therefore, different lighting strategies should be set according to different regions. For example, in Heilongjiang, lights are turned on at about 7:00 in the summer and lights are turned on at 4:00 in the winter. In order to meet different strategies for different periods in different regions, it is generally necessary to divide the whole year into more than 24 segments, which are used at different times. Different switching lights strategies. The energy saving of general street lamps hopes to monitor the data of the site at a distance, and also requires the display of various parameters locally to facilitate the debugging of users. At present, most of the methods adopted are RTU or GPRS DTU. The latter is relatively lower in cost and better in usability. 2.2. The implementation of energy saving in the whole plant is similar to the energy saving principle of lighting. It only adds compensation and monitoring of the power factor. At the same time, the energy saving ratio of the whole plant before and after energy saving needs to be recorded and compared. For example, before the energy saving, the whole plant consumes 130,000 kWh per month, the energy consumption of the entire plant after energy saving is 100,000 kWh per month, and the power factor is also higher than before. All of these require relevant records and analysis. At the same time, the data should be able to get the user's approval. 2.3, frequency conversion energy conservation, the principle is based on the adjustment of the motor speed to achieve the effect of energy saving, such as injection molding machine energy saving, air compressor energy saving. For the energy saving of lighting, energy saving of the whole plant and the requirement of variable frequency energy saving, the C18DRMA-LD special PLC developed by Deweisson integrates all functions required for voltage regulation, speed regulation and energy saving. Including mains voltage, current acquisition, voltage regulator and energy saver control, optional multiple remote communication methods, real-time clock, local 7-segment display and LCD display optional, local touch buttons and PVC buttons selected. At the same time, C18DRMA-LD also retains all the original features of the PLC, including superior anti-jamming capabilities, ladder programmability, a variety of standard communications and IO interfaces, and RAM areas with power-down protection. 3.1 City Acquisition Most of the PLC's CPU modules have a relatively small amount of analog, and the amount of analog power required for energy saving of street lamps is quite large. If it is mid-to-high-end energy-saving control, it usually requires 7-channel analog quantity, which results in an increase in cost. C18DRMA-LD can collect up to 7 analog signals, so that it can meet the needs of most users. The usual energy-saving controller only requires two analog signals, one mains voltage and one current signal, and energy saving in the whole plant. The large street lamp economizer needs to collect 3 voltages and 1 or 4 current signals so that the C18DRMA-LD can easily handle 7 Analog input signal types include: ±10V, ±20mA, thermal resistance, etc. 3.2 Power Factor Calculation For the whole plant energy-saving, the measurement of power factor is indispensable. At present, there is no PLC that supports the conversion of power factor. If the microcontroller is used for development, it will face the problem of too long period and low precision. The analog input of C18DRMA-LD can support AC signal input, and the AD conversion rate is as high as 300K. It can easily satisfy the power factor calculation of 50HZ of the mains, can simultaneously calculate the power factor of the three-phase mains, and upload the data to the user. analysis. 3.3 Real-time clock Most of the energy-saving companies use independent real-time clock controllers, which results in increased costs and decreased reliability. C18DRMA-LD is equipped with a real-time clock, including year, month, day, hour, minute, second, and week. The user can easily use the real-time clock to develop various strategies. 3.4 supports dual communication ports and supports various standard communication protocols The current energy-saving control requires more and more communication and monitoring. Most of streetlight energy-saving requirements can be controlled and adjusted at a remote location. At the same time, a considerable number of users also need to be able to monitor in the field, because each RTU Different communication protocols with screens have greatly increased the difficulty of developing energy-saving manufacturers. C18DRMA-LD has two communication ports, RS232 and RS485. Both ports support MODBUS slave protocol. RS485 supports MODBUS master protocol and FREE protocol. Users can conveniently use these two communication ports and various communication devices. Communication, for example, GSM, GPRS DTU, MODEM, can also communicate with various display screens, monitoring software, configuration software. The last two communication ports can also monitor various third-party meters or inverters to achieve the purpose of integration. 3.5 supports multi-machine networking Streetlight energy-saving controllers Because of the limited amount of control of a single controller, multiple controllers need to be networked for monitoring. Multiple C18DRMA-LDs can be networked via RS485, exchange data, and share the same GPRS and remote server communications. 3.6 itself with human interface C18DRMA-LD with a variety of 7-segment display or LCD LCD display, the user can program settings in the PLC display settings. At the same time with a keyboard interface, up to 4 * 4 keyboard matrix, you can use the PVC film button or touch buttons and so on. 3.7 Compatible with all software and functions of standard V80 PLCs Most energy-saving controllers do not support programmable, resulting in inability to upgrade and on-site maintenance. C18DRMA-LD supports ladder programming, supports power-down retention, supports online programming functions, supports remote monitoring functions, etc. In short, all PLC functions C18DRMA-LD have, C18DRMA-LD is developed on a standard PLC platform. 3.8 Reliability and Electromagnetic Compatibility Energy-saving controllers control large inductive loads with strong interference. How to improve the system's anti-jamming capability has become the most troublesome problem for system designers. The difference between PLC and other control boards developed using MCU is that PLC is a universal industrial control platform. It is not only a software, communication, and interface standard, but also its electromagnetic compatibility and environmental testing. , V80's full range of products have passed the CE certification, can meet customer needs from all aspects. 3.9 Wide temperature range For the needs of outdoor users in the North, C18DRMA-LD can work in a wide temperature range of -40~60°C, and guarantee performance and reliability. As the most powerful supplier of medium and small PLCs in China, C18DRMA-LD is a special energy-saving PLC developed in accordance with the needs of the market. Deweisen can provide users with a complete set of electrical solutions including peripheral equipment. , There are many large-scale energy-saving equipment manufacturers have used Dewei Sen's C18DRMA-LD, everyone is full of praise for C18DRMA-LD's reliability, specificity and flexibility