CN103365273B - A kind of master slave mode identification selection system of redundant communication module based on hardware mutex - Google Patents
A kind of master slave mode identification selection system of redundant communication module based on hardware mutex Download PDFInfo
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- CN103365273B CN103365273B CN201310278834.4A CN201310278834A CN103365273B CN 103365273 B CN103365273 B CN 103365273B CN 201310278834 A CN201310278834 A CN 201310278834A CN 103365273 B CN103365273 B CN 103365273B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
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Abstract
The present invention proposes the master slave mode identification selection system of a kind of redundant communication module based on hardware mutex, including main website, the gating passage being connected with main website, with the channel attached fastener box of gating, slot A and slot B is had on described fastener box, being also associated with conversion in fastener box selects module, conversion to select module to be connected with slot A and slot B respectively.
Description
Technical field
The invention belongs to mechanics of communication apparatus field, especially relate to the master slave mode identification selection system of a kind of redundant communication module based on hardware mutex.
Background technology
Along with the development of science and technology, people are more and more stricter to the safety requirements of production process.Particularly at industrial control field, once go wrong, huge property and personal casualty loss can be caused.Therefore, Contemporary Industrial Design increasingly highlights safety.Using redundancy designed system, its security performance is greatly improved, and fault rate is greatly lowered, and increases productivity.
Summary of the invention
More safe and reliable in order to reach above-mentioned communication link, can Weigh sensor master slave mode, seamless be switched fast, it is ensured that communication link unimpeded.Using hardware mutual exclusion, more safe and reliable advantage, the present invention proposes the master slave mode identification selection system of a kind of redundant communication module based on hardware mutex.
The technical scheme realizing above-mentioned beneficial effect is, a kind of master slave mode identification selection system of redundant communication module based on hardware mutex, including main website, the gating passage being connected with main website, with the channel attached fastener box of gating, described fastener box has slot A and slot B, it is characterised in that, being also associated with conversion in fastener box selects module, conversion to select module to be connected with slot A and slot B respectively.
The present invention uses method based on hardware mutex, it is judged that the communication link in redundant channel so that communication link is more safe and reliable.Can Weigh sensor master slave mode, seamless be switched fast, it is ensured that communication link unimpeded.Use hardware mutual exclusion, more safe and reliable.
Accompanying drawing explanation
Fig. 1 is the structural representation of the whole communication link of the communication controler of the present invention；
Fig. 2 is the structural representation being attached the DETECT of two-way with SELECT signal on base of the present invention；
Fig. 3 is that the present invention is inserted simultaneously into two fasteners, the then topology view of the connection of DETECT and SELECT signal；
Fig. 4 is the data exchange schematic diagram of CPU Yu CPLD original paper of the present invention；
Fig. 5 is the schematic diagram of a kind of embodiment of signal of the present invention output.
Detailed description of the invention
The present invention will be further described below in conjunction with the accompanying drawings.In conjunction with Fig. 1, the master slave mode identification selection system of redundant communication module based on hardware mutex, including main website, the gating passage being connected with main website, with the channel attached fastener box of gating, described fastener box has slot A and slot B, it is characterised in that, being also associated with conversion in fastener box selects module, conversion to select module to be connected with slot A and slot B respectively.In order to realize the redundancy feature of Profibus DP slave station communication controller, Profibus DP slave station communication controller module need to possess and automatically identifies master, from state, and realizes automatically switching, and communication controler is at whole communication link-termination structure such as Fig. 1.For the angle of main website, itself be not aware that data from IO fastener group A or IO fastener group B, he only obtains data from Profibus bus, and gates channel module itself and only does inspection physically, and which paths has signal, is switched on which road.Therefore the gating of fastener group must have the communication transfer interface module inserted in slot A or B identify and select.
Insert the fastener itself in slot A or B and there is no master and slave point, but in working order under, have heat, standby point.Heat, the path being the most just operated, standby, i.e. it is in SBR, but is not involved in collection and the communication of data.
Key component of the present invention is to check circuit, for inquiry hot, for future reference and switching.Such as Fig. 2, on base, the DETECT to two-way is attached with SELECT signal, and passes through resistance eutral grounding.Fastener checks DETECT when being low, then it is assumed that oneself be Warm status, open communication function, and draws high SELECT signal, to represent that the other side's fastener is for standby state.Therefore, under single deck tape-recorder state, no matter fastener inserts A or B slot, is all considered Warm status, carries out proper communication.If being inserted simultaneously into two fasteners, then DETECT and connection such as Fig. 3 of SELECT signal, in the case of fastener is not inserted into slot, DETECT signal is high, represents that fastener is in standby state, and ceaselessly inquires about the state of oneself, in order to enters Warm status at any time.If being inserted simultaneously into A, two fasteners of B, then it is constantly present the problem (Great possibility) successively that powers on, by electric resistance partial pressure on plate, one fastener of total existence first detects that DETECT signal is low, and fastener enters Warm status, and the SELECT signal of itself is drawn high by the fastener entering Warm status, to identify the DETECT of another fastener, it is allowed to enter standby state.Here, we always assume that fastener has powered on sequencing, but in the case of very small probability, fastener powers on simultaneously, then two signals can vibrate output.Gathering DETECT in this output frequency and fastener, the frequency of output SELECT signal is relevant, if if realizing with CPLD, then relevant with clock frequency, therefore adds filtering on hardware so that signal avoids this concussion frequency.The CPU of the present invention carries out heat, the lookup of standby state by the signal of CPLD, as shown in Figure 4, after CPU powers on, judges state the hottest, standby by sts signal pins.If sts is high, then it represents that for Warm status, CPU enters Warm status, if sts is 0, then carries out the inquiry of a period of time, if in inquiry a period of time not yet 0, then CPU enters for state.Either Warm status fastener, or standby state fastener, the moment monitors int pin, once int pin transmission interrupt signal, then CPU inquiry sts pin, to judge and to enter heat, standby state.Additionally, in order to make system relatively reliable, the output to SELECT, many condition judgement can be carried out, such as Fig. 5, the output of SELECT signal, not only relevant with DETECT, also relevant with some states of CPU itself, therefore, once CPU crashes or occurs abnormal, and the heat of fastener, standby state also can automatically switch.
The above; preferable case study on implementation for the present invention; not the present invention is imposed any restrictions, every any simple modification, change and equivalent structure change above example made according to the technology of the present invention essence, all still fall within the protection domain of technical solution of the present invention.
Claims (1)
1. a master slave mode identification selection system for redundant communication module based on hardware mutex,
Including main website, the gating passage being connected with main website, with the channel attached fastener box of gating, described fastener
Slot A and slot B is had, it is characterised in that in fastener box, be also associated with conversion select mould on box
Block, conversion selects module to be connected with slot A and slot B respectively；The circuit of conversion selection module is concrete
For: DETECT in slot A is connected and is passed through resistance eutral grounding with the SELECT in slot B, will insert
In groove A, SELECT is connected with the DETECT in slot B and passes through resistance eutral grounding；When inserting A, B
During two fasteners, then it is constantly present the situation successively that powers on, by electric resistance partial pressure, one card of total existence
Part first detects that DETECT signal is low, and fastener enters Warm status, and the fastener entering Warm status incite somebody to action this
The SELECT signal of body is drawn high, and to identify the DETECT of another fastener, allows it enter standby state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310278834.4A CN103365273B (en) | 2013-07-04 | 2013-07-04 | A kind of master slave mode identification selection system of redundant communication module based on hardware mutex |
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| CN201310278834.4A CN103365273B (en) | 2013-07-04 | 2013-07-04 | A kind of master slave mode identification selection system of redundant communication module based on hardware mutex |
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| Publication Number | Publication Date |
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| CN103365273A CN103365273A (en) | 2013-10-23 |
| CN103365273B true CN103365273B (en) | 2016-12-28 |
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| US8423695B2 (en) * | 2005-01-19 | 2013-04-16 | Broadcom Corporation | Dual PCI-X/PCI-E card |
| JP2010079445A (en) * | 2008-09-24 | 2010-04-08 | Toshiba Corp | Ssd device |
| CN101739326A (en) * | 2008-11-27 | 2010-06-16 | 英业达股份有限公司 | False pull prevention device of multi-storage device system |
| CN101699422B (en) * | 2009-09-30 | 2012-04-25 | 曙光信息产业(北京)有限公司 | Device for carrying out data transmission with terminal |
| CN103186126B (en) * | 2011-12-31 | 2017-03-01 | 北京国电智深控制技术有限公司 | Realize interface arrangement and method that dcs is interconnected with smart machine |
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