CN103092706A - Automatic data transmission fault masking method for 485 bus system - Google Patents
Automatic data transmission fault masking method for 485 bus system Download PDFInfo
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- CN103092706A CN103092706A CN2012104660124A CN201210466012A CN103092706A CN 103092706 A CN103092706 A CN 103092706A CN 2012104660124 A CN2012104660124 A CN 2012104660124A CN 201210466012 A CN201210466012 A CN 201210466012A CN 103092706 A CN103092706 A CN 103092706A
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- serial ports
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- divider
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Abstract
The invention discloses an automatic data transmission fault masking method for a 485 bus system. A plurality of 485 serial port distributors are used, and 485 buses are led to electrical equipment through the 485 serial port distributors. When a certain electrical appliance is damaged, the other electrical equipment on the 485 buses is prevented from being influenced through the 485 serial port distributors, and great convenience is brought to the 485 bus system.
Description
Technical field
The present invention relates to 485 bus system fields, be specially a kind of data transmission automatic shield fault method for 485 bus systems.
Background technology
485 buses are a kind of communication buses commonly used, and for the system that comprises the more electric equipment of the same race of quantity, 485 buses commonly used consist of each electric equipment series connection the equipment in zone.But in the electric equipment after 485 buses series connection, if there is an electric equipment to work, can cause other electric equipments of this electric equipment back all can't work, this brings very big inconvenience for use of whole system.
Summary of the invention
The purpose of this invention is to provide a kind of data transmission automatic shield fault method for 485 bus systems, when connecting electric equipment to solve prior art 485 buses, a node damages the problem that the back node can't work.
In order to achieve the above object, the technical solution adopted in the present invention is:
a kind of data transmission automatic shield fault method for 485 bus systems, have a plurality of electric equipments that pass through 485 bus series connection in described 485 bus systems, it is characterized in that: adopt a plurality of 485 serial ports dividers, at first 485 buses are linked into the master port of first 485 serial ports divider, draw from the host port of first 485 serial ports divider the control port that 485 buses access first electric equipment, draw simultaneously the master port of second 485 serial ports divider of bypass 485 bus accesses from the master port of first 485 serial ports divider, draw the control port of second electric equipment of 485 bus accesses from the host port of second 485 serial ports divider, draw simultaneously the master port of the 3rd 485 serial ports dividers of bypass 485 bus accesses from the master port of second 485 serial ports divider, back and forth form according to this complete link in tandem.
The present invention makes electric equipment access 485 buses by 485 serial ports dividers; the reallocation that 485 serial ports dividers have 485 buses; the function of expansion bus ability to communicate, photoelectricity isolation, isolated from power, emergency protection, enhancing signal; make on 485 buses other electric equipments unaffected by 485 serial ports dividers when certain electric equipment damages, greatly facilitate the use of 485 bus systems.
Description of drawings
Fig. 1 is structure principle chart of the present invention.
Embodiment
As shown in Figure 1.a kind of data transmission automatic shield fault method for 485 bus systems, have a plurality of display devices that pass through 485 bus series connection in 485 bus systems, adopt a plurality of 485 serial ports dividers, at first 485 buses are linked into the master port of first 485 serial ports divider, draw from the host port of first 485 serial ports divider the control port that 485 buses access first display device, draw simultaneously the master port of second 485 serial ports divider of bypass 485 bus accesses from the master port of first 485 serial ports divider, draw the control port of second display device of 485 bus accesses from the host port of second 485 serial ports divider, draw simultaneously the master port of the 3rd 485 serial ports dividers of bypass 485 bus accesses from the master port of second 485 serial ports divider, back and forth form according to this complete link in tandem.
Claims (1)
1. data transmission automatic shield fault method that is used for 485 bus systems, have a plurality of electric equipments that pass through 485 bus series connection in described 485 bus systems, it is characterized in that: adopt a plurality of 485 serial ports dividers, at first 485 buses are linked into the master port of first 485 serial ports divider, draw from the host port of first 485 serial ports divider the control port that 485 buses access first electric equipment, draw simultaneously the master port of second 485 serial ports divider of bypass 485 bus accesses from the master port of first 485 serial ports divider, draw the control port of second electric equipment of 485 bus accesses from the host port of second 485 serial ports divider, draw simultaneously the master port of the 3rd 485 serial ports dividers of bypass 485 bus accesses from the master port of second 485 serial ports divider, back and forth form according to this complete link in tandem.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104660124A CN103092706A (en) | 2012-11-19 | 2012-11-19 | Automatic data transmission fault masking method for 485 bus system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012104660124A CN103092706A (en) | 2012-11-19 | 2012-11-19 | Automatic data transmission fault masking method for 485 bus system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103092706A true CN103092706A (en) | 2013-05-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012104660124A Pending CN103092706A (en) | 2012-11-19 | 2012-11-19 | Automatic data transmission fault masking method for 485 bus system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103092706A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104579419A (en) * | 2015-01-28 | 2015-04-29 | 国家电网公司 | Signal enhancement equipment applied to RS-485 communication system |
-
2012
- 2012-11-19 CN CN2012104660124A patent/CN103092706A/en active Pending
Non-Patent Citations (3)
| Title |
|---|
| 刘洋: "RS-485智能集线器在低压集中抄表系统中的应用", 《电力与能源》 * |
| 张红兵,黄石生,周漪清: "自动转换收发状态的RS-485信号分配器的设计", 《电测与仪表》 * |
| 穆斌,罗珣: "RS-485总线网络应用中的安全与可靠性", 《光学 精密工程》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104579419A (en) * | 2015-01-28 | 2015-04-29 | 国家电网公司 | Signal enhancement equipment applied to RS-485 communication system |
| CN104579419B (en) * | 2015-01-28 | 2017-05-24 | 国家电网公司 | Signal enhancement equipment and RS-485 communication system |
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| PB01 | Publication | ||
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Application publication date: 20130508 |