WO2012086074A1 - プログラマブルコントローラの周辺装置、およびその通信方法 - Google Patents
プログラマブルコントローラの周辺装置、およびその通信方法 Download PDFInfo
- Publication number
- WO2012086074A1 WO2012086074A1 PCT/JP2010/073412 JP2010073412W WO2012086074A1 WO 2012086074 A1 WO2012086074 A1 WO 2012086074A1 JP 2010073412 W JP2010073412 W JP 2010073412W WO 2012086074 A1 WO2012086074 A1 WO 2012086074A1
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- WIPO (PCT)
- Prior art keywords
- peripheral device
- programmable controller
- system information
- communication
- interface
- Prior art date
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F13/00—Interconnection of, or transfer of information or other signals between, memories, input/output devices or central processing units
- G06F13/10—Program control for peripheral devices
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
- G05B19/0426—Programming the control sequence
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/23—Pc programming
- G05B2219/23277—Use of separate interface software, main program calls functions from it
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/23—Pc programming
- G05B2219/23401—Programmer has connection with pc to enter parameters into system directly by pc
Definitions
- the present invention relates to a peripheral device of a programmable controller (PC) and a communication method thereof, and more particularly to communication between a peripheral device connected to a PC and programming the PC.
- PC programmable controller
- Peripheral devices that perform programming of the PC through communication with the PC are connected to the PC via a communication path.
- the user operates the input device of the peripheral device to perform a setting operation on the PC.
- the user confirms the setting result and determines the operation to be performed next.
- the communication middleware in the peripheral device repeats transmission of a request message to the PC and reception of a response message from the PC a plurality of times.
- the round trip time When the round trip time (RTT) is long as a characteristic of the communication path, the number of communication messages affects the communication time, and the time until the operation is completed increases. In the communication path with a short RTT, the processing time of the PC and peripheral devices is dominant in the time until the operation is completed. On the other hand, in the communication path with a long RTT, the waiting time of the RTT is dominant and the usability deteriorates.
- a technique has been proposed that speeds up the acquisition of a request message from a peripheral device and a response message from a PC by providing a cache on a communication path (for example, Patent Documents). 1). Further, a technique for improving the overall performance by using the waiting time until the communication is completed for another work has been proposed (see, for example, Patent Document 2).
- Patent Documents 1 and 2 have a problem of an increase in response time due to poor performance of PCs and peripheral devices, and RTT, which is a characteristic of a communication path, spends much of the communication time. Not effective in the scene.
- the present invention has been made in view of the above, and an object of the present invention is to obtain a peripheral device of a programmable controller and a communication method thereof that can reduce the influence of an increase in RTT and improve usability.
- the present invention is a peripheral device for performing programming of the programmable controller by communication with the programmable controller, and transmits a request to the programmable controller. It has an interface which receives a response according to the request, and the interface acquires and holds system information of the programmable controller transmitted from the programmable controller.
- the present invention pays attention to the fact that communication for acquiring system information is frequently performed.
- the number of messages per operation can be reduced by acquiring part of information necessary for communication from the peripheral device to the PC in advance, and the RTT is long. Reduce the waiting time during operation on the communication path. Thereby, the influence by the increase in RTT is reduced, and usability can be improved.
- FIG. 1 is a block diagram for explaining a peripheral device and a communication method thereof according to the first embodiment of the present invention.
- FIG. 2 is a flowchart for explaining the procedure of the setting operation for the PC.
- FIG. 3 is a conceptual diagram illustrating the relationship between processing from the start of operation to the end of operation by the peripheral device and time.
- FIG. 4 is a flowchart for explaining acquisition of a copy of the system information by the peripheral device according to the second embodiment.
- FIG. 5 is a flowchart for explaining the transmission of a request message.
- FIG. 6 is a flowchart for explaining reception and confirmation of a response message for a request message.
- FIG. 7 is a flowchart illustrating a procedure for determining whether the peripheral device uses a copy of system information or not.
- FIG. 8 is a block diagram illustrating a conventional peripheral device and its communication method.
- FIG. 9 is a flowchart for explaining the procedure of the conventional setting operation for the PC.
- the peripheral device 11 is connected to the PC 2 via the communication path 3.
- the user operates the input device 14 of the peripheral device 11 to perform a setting operation on the PC 2.
- the setting result is displayed on the display device 15 of the peripheral device 11.
- the user confirms the displayed result and determines the operation to be performed next.
- the communication middleware 16 in the peripheral device 11 transmits the request message 17 to the PC 2 and receives the response message 18 from the PC 2 a plurality of times. repeat.
- the processing time of the PC 2 and the peripheral device 11 is dominant in the time from the start of the operation to the completion.
- the RTT waiting time is dominant.
- FIG. 1 is a block diagram for explaining a peripheral device and a communication method thereof according to the first embodiment of the present invention.
- the peripheral device 1 performs programming of the PC 2 by communicating with the PC 2 connected via the communication path 3.
- the peripheral device 1 includes an input device 4, a display device 5, and communication middleware 6.
- the input device 4 receives an input for a setting operation on the PC 2.
- the display device 5 displays the setting result of the PC 2.
- the communication middleware 6 functions as an interface that transmits the request message 7 to the designated PC 2 and receives the response message 8 corresponding to the request message 7.
- the communication middleware 6 has a mechanism for acquiring and holding a copy of the system information 9 of the PC 2 transmitted from the PC 2. A copy of the system information 9 is stored in the communication middleware 6 as the content of the response message 8 for the type of the request message 7.
- FIG. 2 is a flowchart for explaining the procedure of the setting operation for the PC.
- the user performs an input operation with the input device 4 (step S1).
- the communication middleware 6 acquires and holds a copy of the system information 9 of the designated PC 2 in synchronization with, for example, an operation by the user.
- the communication middleware 6 determines whether or not a copy of the system information 9 can be used for the setting content input from the input device 4 (step S2).
- step S2 When the copy of the system information 9 is not usable (step S2, No), the communication middleware 6 transmits the request message 7 to the PC 2 (step S4) and receives the response message 8 from the PC 2 (step S5). ) And do.
- step S2 Yes When the copy of the system information 9 is usable (step S2, Yes), the communication middleware 6 refers to the copy of the system information 9 and acquires data corresponding to the response message 8 (step S3).
- the peripheral device 1 performs the processing of the response message 8 received in step S5 (step S6).
- the peripheral device 1 acquires data in step S3
- the peripheral device 1 regards the acquired data as the response message 8 and performs processing.
- the procedure from Step S2 is repeated as many times as necessary.
- the display device 5 displays the result of the setting operation (step S8). As described above, the peripheral device 1 ends the communication process for setting for the PC 2.
- FIG. 3 is a conceptual diagram for explaining the relationship between processing and time from the operation start to the operation end by the peripheral device.
- three request processes in the peripheral device are executed three times, and two of them can use a copy of the system information 9 as an example.
- the peripheral device 1 performs information acquisition processing in the peripheral device 1 for two request processes.
- the peripheral device 1 transmits the request message 7 to the PC 2 and receives the response message 8 by the response process in the PC 2 only for one request process.
- the peripheral device 1 reduces the communication time by a time T corresponding to two transmission / reception of messages. It can be shortened.
- the peripheral device 1 can effectively shorten the communication time according to the present invention as the RTT of the communication path 3 is longer.
- the waiting time during the operation in the communication path with a long RTT is shortened by reducing the number of messages per operation.
- the effect of increasing the RTT is reduced, and the usability can be improved.
- Embodiment 2 the peripheral device 1 acquires a copy of the system information 9 without being synchronized with the operation by the user. Further, the peripheral device 1 confirms the coincidence between the system information 9 of the PC 2 and the copy of the system information 9 held in the communication middleware 6.
- the configuration of the second embodiment is the same as the configuration of the first embodiment shown in FIG. In the second embodiment, the same parts as those in the first embodiment are denoted by the same reference numerals, and repeated description is omitted as appropriate.
- FIG. 4 is a flowchart for explaining acquisition of a copy of the system information by the peripheral device according to the second embodiment.
- the communication middleware 6 determines whether or not the peripheral device 1 is connected to the PC 2 (step S11). When the peripheral device 1 is connected to the PC 2 (step S11, Yes) and can communicate with the PC 2, the communication middleware 6 transmits a request message 7 for acquiring the system information 9 of the PC 2 to the PC 2.
- the communication middleware 6 acquires a copy of the system information 9 by the response message 8 corresponding to the request message 7 (step S12) and holds it.
- the communication middleware 6 waits until the peripheral device 1 is connected to the PC 2 (Step S13).
- the peripheral device 1 adds a hash value to the request message 7 in order to confirm that the system information 9 of the PC 2 matches the copy of the system information 9 held in the communication middleware 6.
- FIG. 5 is a flowchart for explaining the transmission of a request message.
- the peripheral device 1 calculates the hash value of the data related to the request message 7 out of the copy of the system information 9 held by the communication middleware 6 (step S21).
- the communication middleware 6 adds the hash value calculated in step S21 to the request message 7 and transmits it (step S22).
- FIG. 6 is a flowchart for explaining reception and confirmation of a response message for a request message.
- the peripheral device 1 extracts a hash value from the response message 8 (step S31).
- the peripheral device 1 checks whether or not the hash value added to the request message 7 in step S22 matches the hash value extracted in step S31 (step S32).
- step S32 When it is confirmed that the hash values match (step S32, Yes), the peripheral device 1 continues the response message reception process (step S33). On the other hand, if the hash values do not match (step S32, No), the peripheral device 1 determines that the copy of the system information 9 held by the communication middleware 6 is invalid (step S34). The peripheral device 1 re-executes an operation for obtaining a copy of the system information 9 (step S35).
- Peripheral device 1 determines whether or not the copy of system information 9 held by communication middleware 6 is valid by comparing hash values. Thereby, the peripheral device 1 can suppress an operation based on erroneous information.
- the peripheral device 1 may determine whether to use a copy of the system information 9 for the setting operation of the PC 2 according to the RTT of the communication path 3.
- FIG. 7 is a flowchart illustrating a procedure for determining whether or not a peripheral device uses a copy of system information.
- the peripheral device 1 determines whether or not the copy of the system information 9 held by the communication middleware 6 is valid by the method using the hash value (step S41). If the copy of the system information 9 is invalid (No at Step S41), the communication middleware 6 transmits a request message 7 for acquiring the system information 9 of the PC 2 to the PC 2 (Step S42).
- the communication middleware 6 receives the response message 8 corresponding to the request message 7 (step S43).
- the peripheral device 1 measures the time from the transmission of the request message 7 to the reception of the response message 8 as the RTT of the communication path 3 (step S44).
- the peripheral device 1 determines whether or not the copy acquisition and the RTT measurement are completed for the data size of the system information 9 (step S45).
- the peripheral device 1 performs steps S42, S43, and S44 for the data size of the system information 9. repeat.
- the communication middleware 6 stores a copy of the system information 9 (step S46). After the copy of the system information 9 is stored in step S46, or when the copy of the system information 9 is valid (Yes in step S41), the peripheral device 1 determines whether the measured RTT is greater than a predetermined reference value. Is determined (step S47).
- step S47 If the measured RTT is larger than the predetermined reference value (step S47, Yes), the peripheral device 1 determines that the copy of the system information 9 held by the communication middleware 6 is valid and needs to be used (step S48). ). On the other hand, when the measured RTT is equal to or less than the predetermined reference value (No in step S47), the peripheral device 1 determines that the copy of the system information 9 held by the communication middleware 6 is valid and is not required to be used. (Step S49).
- the peripheral device 1 notifies the user by displaying on the display device 5 that the copies of the system information 9 held by the communication middleware 6 match and whether or not the peripheral device 1 is using a copy of the system information 9. (Step S50).
- the display device 5 functions as a notification unit that notifies the user of the validity of using the copy of the system information 9 held by the communication middleware 6.
- the user recognizes from the information displayed on the display device 5 whether the copy of the system information 9 held by the communication middleware 6 matches and whether the peripheral device 1 uses the copy of the system information 9. be able to.
- the peripheral device 1 applies the method of the present invention when the communication time can be effectively shortened by determining whether or not to use a copy of the system information 9 according to the result of measuring the RTT. Therefore, it is possible to maintain compatibility with conventionally performed communication.
- peripheral device of the programmable controller and the communication method thereof according to the present invention are useful when programming the PC through the communication path.
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Abstract
Description
図1は、本発明の実施の形態1にかかる周辺装置およびその通信方法を説明するブロック図である。周辺装置1は、通信路3を介して接続されたPC2との通信により、PC2のプログラミングを実施する。周辺装置1は、入力装置4、表示装置5および通信ミドルウェア6を有する。
実施の形態2では、周辺装置1は、ユーザによる操作とは同期しないで、システム情報9のコピーを取得する。また、周辺装置1は、PC2のシステム情報9と、通信ミドルウェア6にて保持するシステム情報9のコピーとの一致を確認する。実施の形態2の構成は、図1に示す実施の形態1の構成と同様である。実施の形態2では、実施の形態1と同じ部分には同じ符号を付し、重複する説明を適宜省略する。
2 PC
3 通信路
4 入力装置
5 表示装置
6 通信ミドルウェア
7 要求伝文
8 応答伝文
9 システム情報
Claims (5)
- プログラマブルコントローラとの通信により、前記プログラマブルコントローラのプログラミングを実施するための周辺装置であって、
前記プログラマブルコントローラへ要求を送信し、前記要求に応じた応答を受信するインタフェースを有し、
前記インタフェースは、前記プログラマブルコントローラから送信される前記プログラマブルコントローラのシステム情報を取得し、保持することを特徴とする、プログラマブルコントローラの周辺装置。 - 前記インタフェースは、保持する前記システム情報から算出されたハッシュ値を、前記要求に付加して送信することを特徴とする請求項1に記載のプログラマブルコントローラの周辺装置。
- 前記インタフェースが保持する前記システム情報が有効か否かを判断した結果から、前記インタフェースが保持する前記システム情報の使用の妥当性を通知する通知手段をさらに有することを特徴とする、請求項2に記載のプログラマブルコントローラの周辺装置。
- 前記プログラマブルコントローラとの通信の往復遅延時間を測定し、
前記往復遅延時間が基準値より大きい場合に、前記インタフェースが保持する前記システム情報の使用を要すると判定することを特徴とする請求項1から3のいずれか一つに記載のプログラマブルコントローラの周辺装置。 - プログラマブルコントローラとの通信により、前記プログラマブルコントローラのプログラミングを実施するための周辺装置の通信方法であって、
前記プログラマブルコントローラから送信される前記プログラマブルコントローラのシステム情報を、前記周辺装置のインタフェースが取得し、保持する工程と、
前記周辺装置から前記プログラマブルコントローラへの前記システム情報の取得の要求に応じて、前記インタフェースが保持する前記システム情報を取得する工程と、を含むことを特徴とする、プログラマブルコントローラの周辺装置の通信方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2010/073412 WO2012086074A1 (ja) | 2010-12-24 | 2010-12-24 | プログラマブルコントローラの周辺装置、およびその通信方法 |
CN2010800709249A CN103282844A (zh) | 2010-12-24 | 2010-12-24 | 可编程控制器的***装置及其通信方法 |
DE112010006083.5T DE112010006083T5 (de) | 2010-12-24 | 2010-12-24 | Peripherievorrichtung einer programmierbaren Steuereinrichtung und ein Kommunikationsverfahren dafür |
JP2012549559A JP5595523B2 (ja) | 2010-12-24 | 2010-12-24 | プログラマブルコントローラの周辺装置、およびその通信方法 |
KR1020137016067A KR20130101569A (ko) | 2010-12-24 | 2010-12-24 | 프로그래머블 콘트롤러의 주변 장치 및 그 통신 방법 |
TW100112442A TW201227313A (en) | 2010-12-24 | 2011-04-11 | Peripheral device of programmable controller and communication method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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PCT/JP2010/073412 WO2012086074A1 (ja) | 2010-12-24 | 2010-12-24 | プログラマブルコントローラの周辺装置、およびその通信方法 |
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WO2012086074A1 true WO2012086074A1 (ja) | 2012-06-28 |
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PCT/JP2010/073412 WO2012086074A1 (ja) | 2010-12-24 | 2010-12-24 | プログラマブルコントローラの周辺装置、およびその通信方法 |
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JP (1) | JP5595523B2 (ja) |
KR (1) | KR20130101569A (ja) |
CN (1) | CN103282844A (ja) |
DE (1) | DE112010006083T5 (ja) |
TW (1) | TW201227313A (ja) |
WO (1) | WO2012086074A1 (ja) |
Cited By (1)
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CN110213028A (zh) * | 2013-12-23 | 2019-09-06 | 高通股份有限公司 | Lte分层突发模式 |
Families Citing this family (2)
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WO2014162575A1 (ja) * | 2013-04-04 | 2014-10-09 | 三菱電機株式会社 | エンジニアリングツールおよびプログラマブルロジックコントローラ |
CN106483860B (zh) * | 2015-09-02 | 2019-06-07 | 上海宝信软件股份有限公司 | 针对plc的数据自动采集中间件及其使用方法 |
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JPH0756619A (ja) * | 1993-08-10 | 1995-03-03 | Nissan Motor Co Ltd | 生産管理装置 |
JP2008282363A (ja) * | 2007-05-14 | 2008-11-20 | Keyence Corp | プログラマブルコントローラ、プログラム作成支援装置、コンピュータプログラム及びplcシステム |
JP2010060502A (ja) * | 2008-09-05 | 2010-03-18 | Yokogawa Electric Corp | 計測レコーダ・システム |
Family Cites Families (2)
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JP2006508429A (ja) * | 2003-11-03 | 2006-03-09 | エンドレス ウント ハウザー フローテック アクチエンゲゼルシャフト | プロセスオートメーション技術におけるフィールドデバイスのオフラインパラメータリングの方法 |
JP2007079651A (ja) * | 2005-09-12 | 2007-03-29 | Fuji Electric Fa Components & Systems Co Ltd | プログラマブルコントローラのプログラミング装置 |
-
2010
- 2010-12-24 KR KR1020137016067A patent/KR20130101569A/ko not_active Application Discontinuation
- 2010-12-24 JP JP2012549559A patent/JP5595523B2/ja not_active Expired - Fee Related
- 2010-12-24 DE DE112010006083.5T patent/DE112010006083T5/de not_active Withdrawn
- 2010-12-24 WO PCT/JP2010/073412 patent/WO2012086074A1/ja active Application Filing
- 2010-12-24 CN CN2010800709249A patent/CN103282844A/zh active Pending
-
2011
- 2011-04-11 TW TW100112442A patent/TW201227313A/zh unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0756619A (ja) * | 1993-08-10 | 1995-03-03 | Nissan Motor Co Ltd | 生産管理装置 |
JP2008282363A (ja) * | 2007-05-14 | 2008-11-20 | Keyence Corp | プログラマブルコントローラ、プログラム作成支援装置、コンピュータプログラム及びplcシステム |
JP2010060502A (ja) * | 2008-09-05 | 2010-03-18 | Yokogawa Electric Corp | 計測レコーダ・システム |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110213028A (zh) * | 2013-12-23 | 2019-09-06 | 高通股份有限公司 | Lte分层突发模式 |
CN110213028B (zh) * | 2013-12-23 | 2022-06-21 | 高通股份有限公司 | Lte分层突发模式 |
US11510194B2 (en) | 2013-12-23 | 2022-11-22 | Qualcomm Incorporated | Mixed numerology OFDM design |
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KR20130101569A (ko) | 2013-09-13 |
JP5595523B2 (ja) | 2014-09-24 |
JPWO2012086074A1 (ja) | 2014-05-22 |
CN103282844A (zh) | 2013-09-04 |
TW201227313A (en) | 2012-07-01 |
DE112010006083T5 (de) | 2014-04-10 |
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