Control of PLC in the mall lighting design - Industrial control -

A. Introduction with the continuous development of modern control technology, the intelligent lighting control is becoming more and more demanding. Using intelligent lighting control system not only can provide lighting with a variety of artistic effect, can bring more benefits in order to save energy and reduce the operation cost control requirements; A shopping mall in the different times of the day, the light intensity is different, the following introduce everyone to PLC is how to use in the store lighting.

2. Lighting control requires a large stores a total power of 100 kw, in order to achieve the goal of automatic lighting control, use the PLC to control, the letter bazaar lighting load is divided into five groups, each group 20 kw, and set the initial state for 7:30 am to press the start button. The illumination requirements change over time throughout the day are as follows: 1.

At 7:30 - - - - - - - Transition 8:00, dark, lighting power for 20 kw.

2。 8:00 - - - - - - - 9:30, reduces the light and lighting power of 60 kw.

3。 9:30 - - - - - - - 16:00, slightly reduced light, lighting power of 80 kw.

4。 16:00 - - - - - - - 20:30, guest more lamps, lighting power of 100 kw.

5。 Selves - - - - - - - At 21:00, reduces the light and lighting power of 60 kw.

6。 At 21:00 - - - - - - - At 21:30, transition dim light, lighting power for 20 kw.

7。 Return - - - - - - - The next day at 7:30, closed, the lights went out.

3. Control of I/O allocation table

4. PLC controller ladder diagram and part of the description below is in accordance with the requirements for the program, such as time or different control ways and can be modified according to the scene, to meet the control requirements.

1。 I0. 0 through to the first set of contactor closed, opening 20 kw of lighting lighting, all timers start.

2。 When C0, at the time of the second and third set of contactor is closed, another 40 kw lighting intensity.

3。 When C1, at the time of the fourth group contact closure, add 20 kw lighting.

4。 When C2 timing to complete, with five contactor closed, open the maximum light intensity.

5。 When C3 is timing, fourth and fifth group of contactor disconnect, obscuration to 60 kw.

6。 When C4 timing is completed, the second and third set of contactor disconnect, obscuration to 20 kw.

7。 As C5, at the time of the first set of contactor disconnect, lights out.

8 when C6 is timing, reset all the time, and open a new round of cycle time. Summarizes the intelligent lighting control system under the condition of ensure the lamps and lanterns can work normally, to output a best lighting power of lamps and lanterns, as well as reduce due to overpressure caused by lighting glare, so that light more downy light, lighting distribution more uniform, but also greatly save electricity, intelligent lighting control system power saving rate can reach 20% 40%. Intelligent lighting control system which can be used in the lighting and mixed circuit, strong adaptability, can in all kinds of bad power grid environment and complicated continuous steady work load situation, at the same time also will effectively extend the service life of lamps and lanterns and reduce maintenance costs. Lighting control is realized by using the the letter PLC controller and touch screen, strong anti-jamming performance, high reliability, simple structure, easy to implement.

share technology zone PLC controller instruction transformation which can realize remote control of PLC system in the industrial control system is facing the Internet Internet threats, the current situation of information security is to optimize industrial control scheme based on ARM architecture design, select PLC models should pay attention to what matters
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