Regarding this thing, many friends who do building automation and HVAC systems will ask, what is it? To put it simply, but it cannot be fooled by you too simply. It is a communication protocol specially used for "dialogue" between smart building equipment; for example, it is like we have to speak in the same language, right? There must be such a "Mandarin" thing to exchange data and control each other between devices! It can allow different brands of controllers, sensors, actuators and other messy devices to transmit information smoothly, without having to tie up products from one manufacturer, so that no matter whether you choose equipment when building a new building or renovate and upgrade the old building, it is much more convenient.
1. Device compatibility : Is this the biggest advantage? real! As long as the equipment meets the standards, no matter which country or brand is produced, it can theoretically work together; unlike some non-standard protocols, you can only use your own equipment, and you have to change the brand as a whole, which is a waste of money, right? Provide global procurement services for weak current intelligent products!
2. Transparent data exchange : Through the protocol, the temperature data, humidity value, and equipment operation status can be clearly transmitted from the system. The manager can see it in real time on the computer without having to go to the scene to see the equipment one by one.
3. The system is highly scalable : No matter if you have a large small building, there are few devices at the beginning. If you want to add equipment in the future, as long as the new equipment is also supported, you can use it by simply configuring it. There is no need to disassemble the system you have built with great effort and start over again!
4. Reduce long-term operating costs : Because of the good compatibility and the choice of equipment, you can compare and get cheaper prices when buying equipment; and in the later maintenance, you can find a technician who knows it, so you don’t have to find a high-priced engineer from the original factory…
5. Convenient function upgrades : With the development of technology, the system may need to add new control logic, linkage functions, etc. The system is more flexible in this regard, and there is no need to replace the hardware.
When actually using it, we need to think about what key modules we need to think about them carefully, so let me think about it…
The first one is the controller , which is like a human brain, and is a core component; according to the programs and functions installed in the belly, it can be roughly divided into programmable – such as IP, and those controllers with relatively fixed and unprogrammable functions; when choosing, it should be based on the specific control needs, such as whether you want to control an air conditioner box, or do you have to manage a system on the entire floor? What is the specific format and how to arrange the protocol packets in it? These must be coordinated with the hardware!
The second is the communication network , which supports several networking methods, such as /IP, network cables, or serial cables such as RS-485, and WiFi wireless are gradually becoming popular now. Which one is chosen depends on how you structured it in the building, and where the equipment is distributed in the corners – distance and data transmission speed must be taken into account! Generally, for larger buildings, use / IP for backbone networks, and use RS-485 for small devices, it is almost enough.
The third one is of course the user interface software , which is what we often call the upper computer! If we build such a complex system, we must have some place to look at the data and operate control? This software must be able to summarize the data of all devices and draw a beautiful surveillance screen.
Q: Then what should I do in the first step if I build a system
Answer: The first step… I heard from you that you must understand the needs first! How many types of equipment do you have to connect to the Internet in this building? What parameters do you want to monitor? Is there any special control logic, such as when the temperature exceeds how many degrees, automatically open the window a little, or turn on the cold air of the air conditioner a little? Don't rush to buy equipment. If you don't understand the requirements, do it. The final thing you make may not be what you want at all, and it will be useless to spend money.
Q: In the agreement, what is the use of the called thing? It feels so mysterious? I don't understand a little…
Answer: It’s not difficult! You can understand it as a "self-introduction card" in the system of each device; it records the name, model, who produced it, what version number it has, and what services it supports… When other devices "chat" it, they must first look at this "card" and know how it can do it and how it talks to it, otherwise it will be the same as playing the piano against a cow. Is this the truth? Different devices have different contents
Remember my personal opinion when choosing, don’t just look at the cheap price. Don’t touch those small brands that are not very famous and have actually secretly modified the details of the agreement under the banner of compatibility? You may save two money in the short term, but if you use it for a long time, it will be a problem every three days. That is not a matter of money, and it can make people feel annoyed! You must choose brands that have a good reputation in the market and have been tested for many years. Even if it is a little more expensive, it can be used with reduced usage! It is worry-free and has high customer satisfaction for engineering business friends! If you need to purchase globally about weak current intelligence, you can go and have a look.
Leave a Reply