Data communication system of RS-485 bus

Abstract

The invention provides a data communication system of an RS-485 bus. The data communication system comprises a serial port terminal master station, a plurality of 485 concentrators and a plurality of slave stations, wherein the serial port terminal master station is communicated with the plurality of slave stations through the plurality of 485 concentrators; the plurality of 485 concentrators are respectively connected with the serial port terminal master station; each of the 485 concentrators also respectively corresponds to the plurality of slave stations and is respectively connected with the corresponding plurality of slave stations; and the plurality of slave stations transmit the data to the corresponding 485 concentrators in a parallel mode. The data communication system of the RS-485 bus provided by the invention is relatively high in communication speed and relatively strong in extensibility and applicability.

Description

[0001] 【Technical Field】 [0002] The present invention relates to the technical field of energy storage, in particular to a data communication system of an RS-485 bus. [0003] 【Background technique】 [0004] At present, RS-485 bus is widely used in battery voltage and current monitoring in large-scale energy storage industry, battery charging and discharging system and inverter data due to its hardware system can realize point-to-point, one-master-to-many-slave and convenient expansion. Report etc. [0005] The monitoring communication link is usually connected to multiple hardware acquisition and control devices with RS-485 bus. Each hardware module of the same link layer will be assigned a unique address to identify data from different modules. However, because the RS-485 bus must have and there is only one host to query the upper hardware module connected to the bus to read data, and each device needs a delay when reading and writing switching, which leads to When there are more...

AI Technical Summary

Problems solved by technology

However, since the RS-485 bus is necessary and only one host computer is connected to the bus to inquire about the upper hardware module to read data, and each device also needs a delay when reading and writing, which leads to the current When there are many hardware modules connected to the same bus, the data update in a single cycle is slow

In addition, when a hardware module on the bus fails, the host cannot shield the faulty module

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