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Method and system for increasing RS485 polling efficiency

A RS485 and efficiency technology, applied in the field of improving RS485 polling efficiency, can solve the problems of increasing the data processing volume of the main equipment and increasing the processing workload of the main equipment, so as to improve the polling efficiency, strong anti-electromagnetic interference ability, The effect of long-distance transmission

Inactive Publication Date: 2011-07-20
BEIJING DINGHAN TECH GRP CO LTD
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Problems solved by technology

[0006] 2. Increased requirements for the data processing volume of the main equipment
[0007] When the state of the slave device does not change, the master de

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  • Method and system for increasing RS485 polling efficiency
  • Method and system for increasing RS485 polling efficiency
  • Method and system for increasing RS485 polling efficiency

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Embodiment Construction

[0022] The present invention provides a method for improving the polling efficiency of RS485. The communication conversion module is used as the conversion device between the host and each slave device. The CAN bus is used for communication between the host and the communication conversion module. The communication conversion module and RS485 bus mode communication is adopted between the slave devices; the communication conversion module has a protocol conversion function, and can convert the collected data processing into a unified format; the communication conversion module independently performs data query from the device, and the host computer converts the communication The modules perform data query, and the two are performed independently without interfering with each other; when the host queries the same communication conversion module twice with the same data, the host does not process the data. It works as figure 2 shown.

[0023] image 3 A system for improving th...

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Abstract

The invention discloses a method and system for increasing RS485 polling efficiency. A communication converting module is taken as a converter between a host computer and each piece of slave equipment; the host computer communicates with the communication converting module through a CAN (Controller Area Network) bus; the communication converting module communicates with the slave equipment through an RS485 bus, has a protocol converting function and can convert collected data into data of a uniform format; and the original RS485 system is expanded and high-speed CAN communication is combined with low-speed RS485 communication, so that the overall communication efficiency is increased. By adopting the method and the system, the data processing amount of the host computer is reduced, the data processing efficiency is increased, the instantaneity of equipment detection is enhanced, and the system is easy to expand; and the communication converting module is configured, so that quantity change of RS485 interfaces can be realized easily, the cost is saved and the applicability of a product is enhanced.

Description

technical field [0001] The invention relates to a method for network communication of industrial field equipment, in particular to a method for improving RS485 polling efficiency. Background technique [0002] With the development of modern technology, the degree of informatization of industrial equipment is getting higher and higher, and having a network communication interface has gradually become a necessary requirement. In a distributed control system, there are various communication methods. RS485 has become the first choice for data transmission in industrial applications because of its long transmission distance, multi-node, low cost, and simple implementation. RS485 adopts the bus mode, and one bus can carry multiple devices. However, the half-duplex communication mechanism determines that the master device can only use polling to collect data from the slave devices on the bus, that is, the data collection from the slave device can only complete the data communicat...

Claims

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Application Information

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IPC IPC(8): H04L12/403
Inventor 翟韡强
Owner BEIJING DINGHAN TECH GRP CO LTD
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