DDC controllers, that is, direct digital controllers, are a very critical thing in the current building automation system! Many people want to know how to choose and use the DDC controller well, and whether it can really help us manage equipment such as air conditioners, lighting, etc. These questions are actually just like when I first came into contact with this thing, and they are all question marks! Provide global procurement services for weak current intelligent products!
In short, DDC controller is a small computer that uses digital signals to control various devices. It can collect on-site analog data such as temperature, humidity, pressure, etc., and then analyze and judge according to the programs we compiled in advance, and finally issue control commands to allow those valves, fans, etc. to work as required, achieving the purpose of automatic adjustment and energy saving.
1. Disassembly of selection elements… This is very important!
Input and output points: You must first figure out how many devices you want to control, and how many input and output signals each device needs. You can’t buy fewer points, otherwise it will be troublesome if you don’t have enough, but don’t buy too much and waste money!
Communication protocols: These are commonly used now. You have to see what protocols are used by other devices in your system. You have to match them, otherwise they cannot communicate with each other!
Computational processing capability: If the control logic is more complicated or the amount of data to be processed is relatively large, you have to choose a brain, well, that is, the processing capability is stronger!
Environmental adaptability: What is the installation site environment? Whether the temperature is high, the humidity is high, and whether there is any messy interference, you have to consider these. It is absolutely right to choose a durable one!
2. Daily usage tips… are all about experience!
Regular calibration of sensors: Those temperature sensors and humidity sensors connected to the DDC controller may be inaccurate after being used for a long time. You have to calibrate them every once in a while, so that the control can be accurate!
Backup program: The control program has been worked hard and must be backed up! If something goes wrong with the controller, it will be a big trouble if the program is lost, and re-compiling is time-consuming and laborious!
Stay away from strong electrical interference: When installing, the DDC controller and its lines should be kept away from strong electrical equipment with high currents. If the electromagnetic interference affects it, it will make it work unstable!
Some people may ask, what is the difference between DDC controller and PLC? Let me put it this way, PLC is mainly used on industrial production lines to control equipment with mainly switching volume, which is highly logical; while DDC controllers focus more on environmental parameter control in buildings, such as analog quantity adjustment such as temperature and humidity, and generally have special control algorithms, such as PID adjustment, which is more suitable for the automated control of our construction equipment! Some people are worried that DDC controllers will be difficult to learn? In fact, many manufacturers now provide special programming software, and the interface is also graphical. As long as you understand a little bit of control logic, it is not too difficult to get started. You can think about it more! In terms of safety, the products of ordinary regular manufacturers have basic overvoltage and overcurrent protection, so don’t worry too much about this. Is DDC controller really effective in building energy saving? That's of course! It can accurately control the operation of the equipment according to actual needs, avoid running at full capacity all the time, and save a lot of electricity over time!
I personally think that DDC controllers will definitely become smarter and more powerful in the future. In the development of green buildings and smart buildings, their role will become more and more important. It is a good thing worth studying and utilizing!
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