Building automation systems and smart home systems developed based on LonWorks technology can achieve remote energy consumption monitoring, automated energy-saving control, home security, and networking with other building automation systems on a large scale. Their strong on-site network expansion capabilities are unparalleled compared to ordinary meter reading and security systems.
LonWorks network technology and RS485 bus technology are widely used in the fields of intelligent buildings and industrial automation. It is extremely important to analyze the advantages and disadvantages of LonWorks technology and RS485 bus technology for their reasonable application in practical engineering.
The core of LonWorks technology is the Neuron neuron chip, which includes a fixed LonTalk advanced communication protocol, three CPUs, a multitasking operating system, and flexible input/output methods. The LonTalk protocol provides all seven layer protocols defined by the OSI reference model, among which the 1-6 layer protocols are fixed in the neuron chip, and only the seventh layer application layer is defined according to the application object, which can greatly save development time and cost investment.
1) The groundbreaking achievements of LonWorks technology have contributed to the control network
LonWorks network technology is a fieldbus technology introduced by Echelon Corporation in December 1990. LON (Local Operation Network) is a local operation network that has all the characteristics of fieldbus technology and is increasingly widely used in international high-end equipment. The core of LonWorks technology consists of neuron chips, transceivers, and LonTalk communication protocol. The neuron chip is a very large scale integrated circuit with three CPUs inside, which control communication and the execution of application programs. Neuron chips can form control networks directly or through transceivers.
LonWorks node transceivers come in different types to support different communication media, such as twisted pair, power line, wireless, coaxial cable, infrared, fiber optic, etc. The sophisticated LonTalk protocol ensures the reliability and real-time performance of communication. This type of network is a peer-to-peer, interoperable network with equal status among nodes, no master nodes, good real-time performance, and high reliability. It provides a good control network for applications in building automation, smart homes, industrial automation, rail transit, ship control, flight control, and other fields.
2) LonWorks' openness brings benefits to users
LonWorks technology has good openness, and products from different companies that comply with LonMark standards can work together on the same network. The openness of technology minimizes potential monopoly profits, allowing users to spend less money and choose products that are more suitable for each company. This means that users are no longer restricted by suppliers, and even no longer choose products from suppliers in the second phase of the project, and can connect with the first phase of the project to reduce investment risks; At the same time, in the future, existing LonWorks networks will be able to connect alarm, distress, building automation and other equipment without the need for network investment. Of course, you can purchase these devices from other companies you trust, as long as their products comply with LonMark standards. Such companies are spread both domestically and internationally, and LonWorks technology is developing rapidly in China. Openness brings great initiative to customers, while closed systems are difficult to interconnect with products from other companies, increasing the possibility of customers changing product selection in the future, reducing investment risks, and monopolizing high profits from after-sales services, ultimately reducing customers' total investment in the long run.
3) The topology structure of LonWorks on-site network is very flexible
When LonWorks field networks use twisted pair cables as communication media, they can form bus type, star type, ring type, and free topology networks. The bus type network can reach a distance of up to 2700m without the addition of a repeater, and can be expanded by 2700m with each additional repeater. The free topology network can reach a distance of up to 500m without the addition of a repeater, and can be expanded by 500m with each additional repeater. In the latter structure, communication lines can be branched arbitrarily, improving networking flexibility, greatly facilitating installation, and reducing system maintenance costs.
4) LonWorks network has strong scalability
Building automation systems and smart home systems developed based on LonWorks technology can achieve remote energy consumption monitoring, automated energy-saving control, home security, and networking with other building automation systems on a large scale. Their strong on-site network expansion capabilities are unparalleled compared to ordinary meter reading and security systems.
5) The high reliability of LonWorks technology has achieved the strong anti-interference ability of the system
LonWorks network technology is suitable for use in various harsh environmental conditions and has strong anti-interference capabilities.
6) The maintenance convenience of LonWorks system
Adding new devices, changing device addresses, adjusting operating parameters, system upgrades, etc. to the on-site network can be done through PC settings without changing hardware devices.