CN202068434U - Star-shaped connection communication structure in PLC (programmable logic controller) - Google Patents
Star-shaped connection communication structure in PLC (programmable logic controller) Download PDFInfo
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- CN202068434U CN202068434U CN2010206846196U CN201020684619U CN202068434U CN 202068434 U CN202068434 U CN 202068434U CN 2010206846196 U CN2010206846196 U CN 2010206846196U CN 201020684619 U CN201020684619 U CN 201020684619U CN 202068434 U CN202068434 U CN 202068434U
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Abstract
A star-shaped connection communication structure in a PLC (programmable logic controller) comprises a CPU (central processing unit) master station of the PLC, a plurality of remote sites and at least one DP (display port) repeater, the CPU master station of the PLC is connected with the remote sites through the DP repeaters, and the remote sites in parallel connection are connected onto the DP repeaters. The CPU master station of the PLC is connected with the DP repeaters through DP cables, and the DP repeaters are respectively connected with the remote sites through DP cables. More than one DP repeaters are connected parallelly, and three nodes extending form each DP repeater are correspondingly connected with three remote sites. The star-shaped connection communication structure is simple and easy to use, and other sites cannot be affected by a certain faulted site and can work normally. Faults can be accurately judged and processed in time when faults occurs due to the star-shaped connection structure, and further, the DP repeaters adopted by the star-shaped connection communication structure have interference resistance capability.
Description
Technical field
The utility model belongs to the used communication modes of a kind of PLC, particularly relates to the communication structure of star-like connection among the PLC that can not have influence on other website operate as normal after a kind of certain website breaks down.
Background technology
When adopting PLC to carry out Long-distance Control, need the CPU of PLC and other distant stations to carry out communication, at present, PLC and other distant station communications are to adopt the bus-type connected mode.As shown in Figure 1, the CPU main website of PLC is the mode that is connected in series successively by Profibus DP cable with being connected of a plurality of websites.This connected mode a plurality of websites often occur and loses phenomenon when the CPU of PLC and other website communication, and very short recovery again of duration, is difficult to search failure cause, and therefore, the bus-type connected mode causes very big difficulty to us to failure judgment.And, the bus-type connected mode, the CPU interrupt communication with PLC in case certain website breaks down, so all websites after this website all will with the CPU interrupt communication of PLC.
Summary of the invention
The utility model provides the communication structure of star-like connection among a kind of PLC for solving the technical problem that exists in the known technology.
The technical scheme that the utility model is taked for the technical problem that exists in the solution known technology is: the communication structure of star-like connection among a kind of PLC, include CPU main website and a plurality of remote site of PLC, also be provided with the DP repeater, wherein, the CPU main website of described PLC links to each other with a plurality of remote sites by the DP repeater, and what described a plurality of remote sites were in parallel is connected on the DP repeater.
The CPU main website of described PLC links to each other by the DP cable with the DP repeater.
Described DP repeater links to each other by the DP cable respectively with a plurality of remote sites.
Be provided with more than one DP repeater, the setting that is in parallel of described more than one DP repeater, each DP repeater is drawn three remote sites of connection of 3 node correspondences.
The advantage that the utlity model has with good effect is: the star-like communication structure that is connected among the PLC of the present utility model, be simple and easy to use, in the structure of star-like connection, after breaking down, certain website also can have influence on other website operate as normal, can guarantee the operate as normal of other website.Adopt star-like syndeton, failure judgement and handling failure accurately timely when breaking down.And the DP repeater hardware itself that is adopted also has system's anti-jamming capacity.
Description of drawings
Fig. 1 is the structural representation that the bus-type that adopts of prior art connects communication;
Fig. 2 is the structural representation of the star-like connection communication adopted of the utility model.
Label among the figure is respectively:
The CPU main website of A-PLC; B-DP repeater; C-remote site.
Embodiment
For further understanding summary of the invention of the present utility model, characteristics and effect, enumerate following examples now, and conjunction with figs. to describe the communication structure of star-like connection among the PLC of the present utility model in detail as follows:
As shown in Figure 2, the communication structure of star-like connection among the PLC of the present utility model, include the A of CPU main website and a plurality of remote site C of PLC, also be provided with DP repeater B, wherein, the A of CPU main website of described PLC links to each other with a plurality of remote site C by DP repeater B, and what described a plurality of remote site C were in parallel is connected on the DP repeater B, thereby constitutes the structure of star-like connection.The advantage of star-like connection is not have influence on other website operate as normal after certain website breaks down, to failure judgment and the very big again benefit of processing.
Wherein, the A of CPU main website of described PLC links to each other by Profibus DP cable with DP repeater B.Described DP repeater B links to each other by Profibus DP cable respectively with a plurality of remote site C.
In the communication structure of star-like connection, be provided with more than one DP repeater B among the PLC of the present utility model, the described more than one DP repeater B setting that is in parallel, each DP repeater B draws three remote site C of connection of 3 node correspondences.The model of the DP repeater that the utility model adopted is: 6ES7 972-0AA01-0XA0, this DP repeater hardware itself also has the function of system's antijamming capability.
The communication structure of star-like connection among the PLC of the present utility model, specific implementation is the advanced DP repeater of DP cable of drawing from the CPU main website of PLC, then with the parallel connection of 3 DP repeaters, each DP repeater can be drawn 3 nodes and is used to connect three distant stations, has so just realized the communication modes of star-like connection.
Claims (4)
1. the communication structure of star-like connection among the PLC, include CPU main website (A) and a plurality of remote site (C) of PLC, it is characterized in that: also be provided with DP repeater (B), wherein, the CPU main website (A) of described PLC links to each other with a plurality of remote sites (C) by DP repeater (B), and what described a plurality of remote sites (C) were in parallel is connected on the DP repeater (B).
2. the communication structure of star-like connection among the PLC according to claim 1 is characterized in that: the CPU main website (A) of described PLC links to each other by the DP cable with DP repeater (B).
3. the communication structure of star-like connection among the PLC according to claim 1 is characterized in that: described DP repeater (B) links to each other by the DP cable respectively with a plurality of remote sites (C).
4. the communication structure of star-like connection among the PLC according to claim 1, it is characterized in that: be provided with more than one DP repeater (B), described more than one DP repeater (B) setting that is in parallel, each DP repeater (B) is drawn three remote sites of connection (C) of 3 node correspondences.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206846196U CN202068434U (en) | 2010-12-28 | 2010-12-28 | Star-shaped connection communication structure in PLC (programmable logic controller) |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010206846196U CN202068434U (en) | 2010-12-28 | 2010-12-28 | Star-shaped connection communication structure in PLC (programmable logic controller) |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202068434U true CN202068434U (en) | 2011-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010206846196U Expired - Fee Related CN202068434U (en) | 2010-12-28 | 2010-12-28 | Star-shaped connection communication structure in PLC (programmable logic controller) |
Country Status (1)
| Country | Link |
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| CN (1) | CN202068434U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11276366B2 (en) | 2018-07-20 | 2022-03-15 | Samsung Electronics Co., Ltd. | System including a plurality of display apparatus and control method thereof |
-
2010
- 2010-12-28 CN CN2010206846196U patent/CN202068434U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11276366B2 (en) | 2018-07-20 | 2022-03-15 | Samsung Electronics Co., Ltd. | System including a plurality of display apparatus and control method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111207 Termination date: 20161228 |