CN203825445U - IO module address overlap identification system in process control station - Google Patents
IO module address overlap identification system in process control station Download PDFInfo
- Publication number
- CN203825445U CN203825445U CN201420090746.1U CN201420090746U CN203825445U CN 203825445 U CN203825445 U CN 203825445U CN 201420090746 U CN201420090746 U CN 201420090746U CN 203825445 U CN203825445 U CN 203825445U
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- Prior art keywords
- module
- resistance
- circuit
- process controller
- control station
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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]
Abstract
The utility model discloses an IO module address overlap identification system in a process control station. The system comprises a plurality of IO modules and a process controller, wherein the IO modules are connected with the process controller through an IO communication network and an IO module address overlap identification circuit. The IO module address overlap identification circuit comprises a process controller inner circuit arranged inside the process controller and multiple IO module circuits. Each IO module circuit comprises an IO module resistor connected with the corresponding IO module and a switch circuit connected with the other end of the IO module resistor. The process controller inner circuit comprises a comparison circuit whose positive end input voltage is a fixed value and negative end input voltage changes according to the fact that whether the IO module address inside the process control station overlaps, and the negative end of the comparison circuit is connected with the common end of the multiple switch circuits. The system can rapidly judge whether the addresses of the IO modules overlap, and damage to site equipment caused by abnormal conditions can be effectively prevented.
Description
Technical field
The utility model relates to a kind of address overlap recognition system, is specifically related to IO module address overlap recognition system in a kind of process control station.
Background technology
Scattered control system (distribute control system, DCS) is a kind of new control system that integrates control technology, computer technology, the communication technology, network technology.Decentralised control and centralized management, be distributed to the control task of complicated industrial process on several process control stations and complete, and realize concentrated supervision, operation and the management to whole production run by the communication between SCADA and each process control station.
Process control station is the scattered control system CPU (central processing unit) of (being called for short DCS), is the core component of DCS.Scattered control system comprises the various IO modules in process controller (being called for short DPU) and station, thereby process controller is responsible for the computing of steering logic and is realized the signal collecting and controlling to field apparatus by communicating by letter of the IO module with in station, in general each IO module is assigned a unique address in this process control station, and process controller is generally all realized by these addresses and the exchanges data of the interior IO module of standing.
Process controller just need to be processed following several situation like this:
(1) stand in IO module address arrange incorrect, not in process controller configured list, the not communication of response process controller of this IO module, process controller can not carry out normal exchanges data with this IO module.
(2) stand in IO module address arrange correct incorrectly but type arranges, whether process controller can mate to identify with the type that corresponding address in process controller configures according to the type in communication message.
(3) not identical but the interior IO module address of standing arranges the module type of overlapping address overlap, now, the IO module reading and writing data that address configuration is correct is normal, and the IO module of address configuration mistake can not normally read and write data, but the data between two kinds of modules are independent of each other.
(4) stand in IO module address overlapping and address is set that overlapping module type is set is identical, now, the IO module data of address configuration mistake will have influence on the IO module data that address configuration is correct, can bring very large danger to field apparatus like this.
In actual field debug process, even also can find in time while there are above-mentioned abnormal conditions, and also not all operations of equipment in debug process, therefore the danger bringing is less; But in system business operational process, occur IO module damage and more renew IO module time, if maintainer's carelessness arranges mistake by new IO module address, cause above-mentioned the 4th kind of abnormal conditions to occur, the lighter will cause system stoppage in transit, severe one, by damage on-site equipment, is brought huge loss to user.
Utility model content
The deficiency existing for prior art, the utility model object is to provide a kind of interior IO module address overlap recognition system of process control station that can identify overlapping address, has avoided infringement equipment being caused because of the interior IO module address overlap of process control station.
To achieve these goals, the utility model is to realize by the following technical solutions:
IO module address overlap recognition system in process control station of the present utility model, comprises a plurality of IO modules and process controller, and a plurality of IO modules are connected with process controller by IO communication network, IO module address overlap identification circuit respectively; IO module address overlap identification circuit comprises circuit and a plurality of IO module circuit in the process controller being arranged in process controller; IO module circuit comprises the IO module resistance being connected with corresponding IO module and the on-off circuit being connected with the IO module resistance other end; In process controller circuit comprise anode input voltage be fixed value, negative terminal input voltage according to the whether overlapping comparator circuit changing in IO module address in process control station, the negative terminal of comparator circuit is connected with the common port of a plurality of on-off circuits.
Between the negative terminal of above-mentioned comparator circuit and the common port of a plurality of on-off circuits, be also connected with resistance R 5, one end of resistance R 5 also connects voltage source by resistance R 4, and the other end of resistance R 5 is also by resistance R 6 ground connection; The anode of described comparator circuit is connected with resistance R 1 and resistance R 2, resistance R 1 is connected with resistance R 2, and the other end of resistance R 1 also connects voltage source, the other end ground connection of resistance R 2, the common port of resistance R 1 and resistance R 2 is also connected with resistance R 3, the output terminal of another termination comparator circuit of resistance R 3.
The utility model unusual condition that the interior IO module of deterministic process control station address overlaps fast, and effectively take precautions against the infringement that this abnormal conditions cause field apparatus; Hardware is realized the disposal route of IO module address overlap in deterministic process control station and has been simplified the communication protocol between process controller and IO module, guarantee the real-time communication between process control station and IO module, improved the control effect of whole process control station simultaneously; Realize circuit simple possible and cost lower.
Accompanying drawing explanation
Fig. 1 is the configured in one piece Organization Chart (wherein, solid line represents IO communication network, and dotted line represents IO module address overlap identification circuit line) of process control station of the present utility model;
Fig. 2 is IO module address overlap identification circuit schematic diagram of the present utility model.
Embodiment
For technological means, creation characteristic that the utility model is realized, reach object and effect is easy to understand, below in conjunction with embodiment, further set forth the utility model.
Referring to Fig. 1, between process controller and IO module, by IO communication network, connect; Between process controller and each IO module, by IO module address overlap identification circuit, (referring to Fig. 2, be labeled as " circuit in DPU " realizes in DPU; Be labeled as " IO module n circuit " and realize in each IO module, the circuit in each IO module is the same) connect.
The IO module address being connected on this IO communication network need to be arranged to different.
The IO module being connected on this IO communication network all need to be configured at process control station, and configuration information comprises IO module address and type.
Process controller visits these IO modules according to the IO module information configuring, and needs the address information that comprises IO module in visit data;
When process controller is accessed any one IO module, the IO module being accessed to (according to the address in visit data whether with self mate to determine whether to have access to oneself) will by communication message, return oneself data and type.
The circuit that the utility model has designed a set of uniqueness is used for monitoring whether IO module address overlap occurs on IO network; In process controller, designed a comparator circuit, the anode input voltage of comparator circuit is fixed value; Whether negative terminal input voltage overlaps and changes according to IO module address in station.
Between the negative terminal of comparator circuit and the common port of a plurality of on-off circuits, be also connected with R1, R2 and R3; The anode of comparator circuit is connected with R4, R5 and R6.
Recognition methods of the present utility model, specifically comprises following step:
(1) each IO module is arranged to different address and type, specifically by the hardware circuit setting on IO module or software, arrange and all can.
(2) on process controller, configure address and the type of each IO module.
Referring to Fig. 2, the positive terminal voltage of comparator circuit is a fixed value V+; This magnitude of voltage changes according to the resistance value of resistance R 1, R2 and R3 is different.Comparator circuit negative terminal voltage is V-, and by on-off circuit in and IO module different according to the resistance value of resistance R 4, R5 and R6, whether closure changes this magnitude of voltage.
(3) while there is no IO module responding communication on IO communication network, now closed without any on-off circuit, V->V+, the output MACK signal of comparator circuit is low level.
When process controller is accessed any one IO module, the IO module being accessed to (according to the address in visit data whether with self mate to determine whether to have access to oneself) by the IOn_ACK signal setting of oneself, be high level, on-off circuit is closed, IO module resistance access circuit; Now comparator circuit negative terminal voltage V-will reduce, but still keep V->V+, and the output MACK signal of comparator circuit is still low level;
On IO communication network, all IO module addresses do not have when overlapping, namely process controller can only carry out normal exchanges data with an IO module, at synchronization, only has a unique on-off circuit closure, now, the output MACK signal of comparator circuit will be low level;
While having two or more IO module address overlap on IO communication network, now process controller carries out exchanges data by the IO module with all identical address, in this case, at synchronization, to have two or more on-off circuits closed, now, comparator circuit negative terminal voltage V-will continue to reduce, make V-<V+, the output MACK signal of comparator circuit will become high level;
When process controller is when to monitor MACK signal be high, can confirm to have in active procedure control station the IO module of address overlap.
The simple comparator circuit of the utility model utilization just can guarantee the unusual condition of the interior IO module address overlap of identifying control station accurately, has guaranteed the control effect of whole process control station simultaneously.
More than show and described ultimate principle of the present utility model and principal character and advantage of the present utility model.The technician of the industry should understand; the utility model is not restricted to the described embodiments; that in above-described embodiment and instructions, describes just illustrates principle of the present utility model; do not departing under the prerequisite of the utility model spirit and scope; the utility model also has various changes and modifications, and these changes and improvements all fall within the scope of claimed the utility model.The claimed scope of the utility model is defined by appending claims and equivalent thereof.
Claims (2)
1. an IO module address overlap recognition system in process control station, comprises a plurality of IO modules and process controller, it is characterized in that,
Described a plurality of IO module is connected with process controller by IO communication network, IO module address overlap identification circuit respectively;
Described IO module address overlap identification circuit comprises circuit and a plurality of IO module circuit in the process controller being arranged in process controller;
Described IO module circuit comprises the IO module resistance being connected with corresponding IO module and the on-off circuit being connected with the IO module resistance other end;
In described process controller, circuit comprises comparator circuit, and the negative terminal of described comparator circuit is connected with the common port of a plurality of on-off circuits.
2. the interior IO module address overlap recognition system of process control station is characterized in that according to claim 1,
Between the negative terminal of described comparator circuit and the common port of a plurality of on-off circuits, be also connected with resistance R 5, one end of resistance R 5 also connects voltage source by resistance R 4, and the other end of resistance R 5 is also by resistance R 6 ground connection;
The anode of described comparator circuit is connected with resistance R 1 and resistance R 2, resistance R 1 is connected with resistance R 2, and the other end of resistance R 1 also connects voltage source, the other end ground connection of resistance R 2, the common port of resistance R 1 and resistance R 2 is also connected with resistance R 3, the output terminal of another termination comparator circuit of resistance R 3.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420090746.1U CN203825445U (en) | 2014-02-28 | 2014-02-28 | IO module address overlap identification system in process control station |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420090746.1U CN203825445U (en) | 2014-02-28 | 2014-02-28 | IO module address overlap identification system in process control station |
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| Publication Number | Publication Date |
|---|---|
| CN203825445U true CN203825445U (en) | 2014-09-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420090746.1U Expired - Fee Related CN203825445U (en) | 2014-02-28 | 2014-02-28 | IO module address overlap identification system in process control station |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103853140A (en) * | 2014-02-28 | 2014-06-11 | 南京国电南自美卓控制系统有限公司 | IO module address overlap identification system and method in process control station |
-
2014
- 2014-02-28 CN CN201420090746.1U patent/CN203825445U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103853140A (en) * | 2014-02-28 | 2014-06-11 | 南京国电南自美卓控制系统有限公司 | IO module address overlap identification system and method in process control station |
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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 |
Granted publication date: 20140910 Termination date: 20170228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |