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With economic development and increase in energy consumption , central air-conditioning power consumption has been close to our society 20% of total electricity consumption , while the market dedicated controller features a single, overall control of the system is difficult , therefore , new central air-conditioning energy-saving controller has huge market potential and economic benefits. First , in accordance with the requirements of the central air-conditioning energy saving control system solutions designed using ADI's iCoupler digital isolator technology to isolate the data transfer bus , 2.5KV achieve electrical isolation , to achieve high data transfer rate , timing accuracy is good, common-mode transient immunity strong advantages ; complete with dual CAN bus real-time communication between controllers ; 100M ethernet controller and is responsible for communication between the host computer ; design forms to meet the IO interface point central air conditioning system requirements ; doing a variety of other communications design, easy maintenance, expansion and upgrading. Secondly, the use ARMv7 Cortex-M3 LM3S8970 microcontroller core for control core , four- panel design . Controller with 8 -channel isolated AI, 8 -channel isolated AO, 10 -channel isolated DI, 10 -channel isolated DO, 2 channel CAN bus , 1 Ethernet , 1 RS-232C serial port, an infrared serial Road , 1 channel SSI expansion. Again, the combination of central air-conditioning energy-saving control system software architecture , a detailed program design . Using real-time control priority interrupt at the end of the chain scheduling strategy to meet the requirements of real-time control software ; follow the programming specifications for energy-saving controller embedded software development, including board-level definitions , drivers, communications software and control algorithms. Finally , the establishment of a hardware test equipment EKI-LM3S2965 with IAR EWARM embedded test platform for the embedded energy saving controller hardware testing, software testing and test hardware and software systems . The results show that energy-saving controller hardware and embedded software is stable, reliable, real-time tracking for a given signal , can be used in central air-conditioning energy saving control system for saving energy consumption , there is a huge and profound significance. And , to build an embedded test platform , with a certain versatility, suitable for embedded products related tests .
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