With the continuous development of modern control technology, the requirements for intelligent lighting control are getting higher and higher. The use of intelligent lighting control system can not only provide a variety of artistic effects for lighting, but also bring the benefits of saving energy and reducing operating costs. Control requirements; a certain shopping mall has different lighting intensity at different times of the day. Let me show you the following Introduce how PLC is used in shopping mall lighting.
2. Control requirementsThe total lighting power of a large shopping mall is 100KW. In order to achieve the purpose of automatic lighting control, Aoyuexin PLC is used for control. The lighting load of the shopping mall is divided into five groups, each group is 20KW, and the initial state is 7:30 in the morning. Press the start button . The lighting requirements throughout the day change over time as follows:
1.7:30-8:00, transitional dim light, lighting power is 20KW.
2.8:00--9:30, less customers and dimming, the lighting power is 60KW.
3.9:30-16:00, slightly dimmed, the lighting power is 80KW.
From 4.16:00 to 20:30, all the lights will be turned on and the lighting power will be 100KW.
5.20:30-21:00, customer reduction dimming, lighting power is 60KW.
6.21:00-21:30, the transition is dark, the lighting power is 20KW.
7.21:30-7:30 the next day, business will be closed and the lights will be off.
3. Control I/O Allocation Table
The following figure is a program written in accordance with the above requirements. If the time or control method is different, it can be modified according to the scene to meet the control requirements.
1. When I0.0 is turned on, the first group of contactors is closed, the 20KW lighting is turned on, and all timers are started.
2. When the C0 timing is over, the second and third groups of contactors are also closed, and the lighting intensity of 40KW is increased.
3. When the timing of C1 is finished, the fourth group of contactors is closed, and 20KW lighting is added.
4. When the timing of C2 is finished, the fifth group of contactors is closed and the maximum light intensity is turned on.
5. When the C3 timing is over, the fourth and fifth groups of contactors are disconnected and the light is reduced to 60KW.
6. When the timing of C4 is finished, the second and third groups of contactors are disconnected and the light is reduced to 20KW.
7. When the C5 timing is over, the first group of contactors are disconnected and the lights are all off.
8 When C6 timing is finished, reset all timings and start a new round of cycle timing.
The intelligent lighting control system can output an optimal lighting power to the lamp under the condition that the lamp can work normally, which can reduce the lighting glare caused by overvoltage, make the light emitted by the light softer, and the lighting distribution is more uniform. It can also greatly save power, and the power saving rate of the intelligent lighting control system can reach 20%-40%. The intelligent lighting control system can be used in lighting and hybrid circuits. It has strong adaptability and can work continuously and stably in various harsh grid environments and complex load conditions. It will also effectively extend the life of the lamps and reduce maintenance costs. It adopts Aoyuexin PLC and touch screen to realize lighting control, with strong anti-interference performance, high reliability, simple structure and easy realization.
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