WO2004107698A1 - プログラマブルコントローラ - Google Patents
プログラマブルコントローラ Download PDFInfo
- Publication number
- WO2004107698A1 WO2004107698A1 PCT/JP2003/006697 JP0306697W WO2004107698A1 WO 2004107698 A1 WO2004107698 A1 WO 2004107698A1 JP 0306697 W JP0306697 W JP 0306697W WO 2004107698 A1 WO2004107698 A1 WO 2004107698A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- serial port
- state
- protocol
- communication
- general
- Prior art date
Links
- 238000004891 communication Methods 0.000 claims abstract description 100
- 238000000034 method Methods 0.000 claims description 27
- 230000008569 process Effects 0.000 claims description 10
- 230000008859 change Effects 0.000 claims description 2
- 230000006870 function Effects 0.000 description 37
- 230000005540 biological transmission Effects 0.000 description 15
- 230000007704 transition Effects 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000013500 data storage Methods 0.000 description 4
- 238000007796 conventional method Methods 0.000 description 2
- 208000033748 Device issues Diseases 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000004044 response Effects 0.000 description 1
Classifications
-
- 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
- G06F13/38—Information transfer, e.g. on bus
- G06F13/382—Information transfer, e.g. on bus using universal interface adapter
- G06F13/387—Information transfer, e.g. on bus using universal interface adapter for adaptation of different data processing systems to different peripheral devices, e.g. protocol converters for incompatible systems, open system
-
- 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
- G06F13/14—Handling requests for interconnection or transfer
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
Definitions
- the present invention uses a general-purpose communication protocol function and a computer link dedicated protocol function! / Programmable controller with serial port
- serial communication required for a programmable controller includes a computer link dedicated protocol and a general-purpose communication protocol.
- the computer link-specific protocol is a fixed protocol in which the message to be accessed is composed of a header and application data.
- the programable controller is a fixed protocol sent from the partner device (measuring instrument, personal computer, etc.). This protocol does not require a user program because data is sent and received based on the specified command. For this reason, the computer link dedicated protocol can read and write the device data and user program of the programmable controller from a partner device such as a computer without writing a user program in the programmable controller, and can write to the program controller. It is possible to monitor the state of the equipment.
- the general-purpose communication protocol enables data communication in any message format that matches the specifications of the partner device, enabling communication between the programmer controller and the partner device equipped with another serial port. I have. For this reason, in order for the programmable controller to communicate with another device equipped with another serial port, it is necessary to create a communication control sequence program tailored to the other device.
- a parameter area is provided in the programmable controller to write parameters for using and dividing the serial port so that both functions of the computer link dedicated protocol and the general-purpose communication protocol can be used. ing.
- a parameter for selecting and setting one of the general-purpose communication function and the computer link function is set, thereby switching the communication control function of the serial port.
- the programmable display device switches between a communication mode in which the programmable display device communicates with a personal computer and a communication mode in which the programmable display device communicates with a PLC. It has communication middleware for switching.
- the communication middleware switches the communication mode according to a setting signal from a personal computer connected to the serial port in the programmable display.
- Patent Document 1
- Patent Document 2
- the communication control method cannot be changed by the middleware itself, and the programmable display can be performed by operating a personal computer.
- a personal computer was required separately from the programmable display to switch the communication control method of the display.
- the present invention has been made in view of the above, and provides a programmable controller capable of selecting and setting any one of a general-purpose communication protocol function and a computer link dedicated protocol function using a dedicated procedure by the programmable controller itself. It is aimed at. Disclosure of the invention
- a general-purpose communication protocol that performs communication with the serial port according to specifications of a partner device is processed.
- Switching means for selectively using one of three possible states, a second state capable of being processed by a dedicated computer link protocol for performing communication based on fixed specifications, and an idle state.
- the serial port is switched to the first state by an instruction to initialize the serial port in a program for general-purpose communication protocol, and the external device uses the dedicated protocol for the computer link.
- the signal to start the communication When the serial port receives, the serial port is switched to the second state, and when the serial port is in the first state, the serial port is idled by an instruction to close the serial port in the program for the general-purpose communication protocol. State, and when the serial port is in the second state, the serial port is switched to an idle state after communication with an external device using the computer link dedicated protocol is completed.
- the serial port of the programmable controller is provided with switching means for selectively using either the general-purpose communication protocol function or the computer link-specific protocol function using the special procedure, the general-purpose communication protocol function and the special procedure are used. To use the dedicated protocol function for computer link using It is not necessary to set the parameters for each time.
- FIG. 1 is a diagram showing a circuit configuration of the programmable controller according to the present embodiment
- FIG. 2 is a ladder program showing an instruction for initializing the serial port 6
- FIG. FIG. 4 is a ladder program showing a transmission instruction in the general-purpose communication used.
- FIG. 4 is a ladder program showing a reception instruction in the general-purpose communication using the serial port 6, and
- FIG. 5 is a ladder program showing the use of the serial port 6.
- Fig. 6 is a ladder program showing an instruction to initialize the serial port 6 by specifying a port number.
- FIG. 8 is a state transition diagram showing transition contents of a state sequence, and FIG. 8 shows an example of a communication frame used in a computer link dedicated protocol.
- FIG. 9 is a flowchart showing a processing procedure at the time of executing an instruction of the general-purpose communication protocol.
- FIG. 1 is a diagram showing a circuit configuration of a programmable controller according to the present invention.
- the programmable controller comprises a CPU 1, a ROM 2, a RAM 3, a user program memory unit 4, a 10 interface unit 5, and one or more serial ports 6.
- the serial port 6 is a computer 9 or an external device. It is electrically connected to 10 by serial cable 11. It is assumed that one serial port 6 is connected to one external device 10 or the like.
- the CPU 1 performs signal processing of the entire programmable controller. And an execution processing procedure such as a general-purpose communication protocol described later.
- the RAM 3 stores parameters that specify the operation of the work area sequence program.
- the RAM 3 includes a reception data storage area 30 for temporarily storing reception data during communication and a transmission data storage area 31 for temporarily storing transmission data during communication.
- the RAM 3 also has a device memory 32 for storing, as arguments, parameters of instructions used during communication.
- the device memory 32 here is a memory that can be used freely by the user of the programmable controller in the user program stored in the user program memory unit 4, and is temporarily generated by the program operation. It stores data and historical trend data.
- the RAM 3 has a status SQ storage area 33 for storing a status sequence indicating the usage status of the serial port 6.
- the user program memory unit 4 stores a user program for selectively using a general-purpose communication port of the serial port 6 and a dedicated protocol for computer link by a special procedure.
- the protocol dedicated to computer link is fixed to a message to be accessed consisting of a header and application data.
- the programmable controller is a fixed protocol sent from the partner device (measuring instrument, personal computer, etc.). This is a protocol that does not require a user program because data is sent and received based on simplified instructions.
- the general-purpose communication protocol allows data communication in an arbitrary message format that matches the specifications of the partner device, and enables the programmable controller to communicate with the partner device equipped with another serial port. .
- the I / O interface unit 5 connects the CPU 1, ROM 2, RAM 3, user program memory unit 4, and other peripheral circuits.
- the CPU 1, ROM 2, RAM 3, user program memory unit 4, and I / O interface unit 5 are electrically connected to each other via signal lines 7, so that signals can be exchanged with each other. .
- Serial port 6 can be connected to computer 9 or an external It is connected to the device 10 and exchanges various information between the programmable controller and the computer 9 or the external device 10. Further, the serial port 6 and the IZO interface unit 5 are electrically connected by a signal line 8 so that signals can be exchanged with each other. In addition, the serial port 6 has a control function that enables switching between a computer link dedicated protocol communication using a dedicated procedure performed between the computer 9 and the external device 10 and a general communication protocol.
- FIG. 2 is a ladder program showing an instruction for initializing the serial port 6.
- ⁇ 0 is the activation signal of the OPEN instruction.
- the O PEN instruction is executed by the ON of the start signal M 0, and a declaration to use the serial port 6 is made.
- FIG. 3 is a ladder program of a transmission instruction in general-purpose communication using the serial port 6.
- M 1 is a start signal of a transmission command
- the argument device S 1 and the argument device S 2 are arbitrary device numbers in the device memory 32 space existing in the RAM 3.
- the start signal M1 is turned on, the OUTPUT instruction is executed, and the data stored in the argument device S1 and subsequent devices is transferred to the computer 9 and the serial port 6 as many as the number of data stored in the argument device S2.
- Send to external device 10 (output data).
- the transmission data transmitted by the serial port 6 when communicating with the external device 10 or the like using the general-purpose communication protocol is temporarily stored in the transmission data storage area 31 and then transmitted to the external device 10. Shall be sent to FIG.
- M 2 is a start signal of a reception command
- the argument device D 1 and the argument device D 2 are arbitrary device numbers in the device memory 32 space existing in the RAM 3.
- the INPUT instruction is executed at ⁇ N of the start signal M2, and the data received from the computer 9 or the external device 10 via the serial port 6 is stored in the device memory 32 after the argument device D1 and received.
- the number of data Store it in D2 of the argument device.
- the received data received by the serial port 6 is temporarily stored in the received data storage area 30, and then transmitted to the external device 10. Shall be.
- FIG. 4 is a ladder program of a reception instruction in general-purpose communication using the serial port 6.
- M 2 is a start signal of a reception command
- the argument device D 1 and the argument device D 2 are arbitrary device numbers in the device memory 32 space existing in the RAM 3.
- the INPUT instruction is executed at ⁇ N of the start signal M2, and the data received from the computer 9 or the external device 10 via the serial port 6 is stored in the device memory
- FIG. 5 is a ladder program showing an instruction to end the use of the serial port 6.
- M3 is a start signal of the CLOSE instruction.
- the start signal M3 turns ON, the CLOSE instruction is executed and the occupation of serial port 6 is released.
- the ladder program in the case where the serial port 6 of the programmable controller is constituted by one is described.
- the serial port 6 of the programmable controller is constituted by a plurality, Also, by assigning the argument specifying the port number of serial / port 6 to the ladder program, the desired serial port 6 is selected from the plurality of serial ports 6 to perform communication using the general-purpose communication protocol. Becomes possible.
- FIG. 6 is a ladder program showing an instruction for initializing serial port 6 by designating a port number. If the argument device that specifies the port number is P N, for example, it becomes possible to execute the OP EN instruction with the port number specified by “OPEN PN”. Similarly, it is possible to execute an OUT PUT instruction with a specified port number using “OUTPUT PN SIS 2” and an IN PUT instruction with a specified port number using “I NPUT PN D 1 D 2” . Furthermore, it is possible to execute a CLOSE command with a specified port number by "CLOSE PN".
- FIG. 7 is a state transition diagram showing transition contents of the state sequence stored in the state SQ storage area 33.
- the sequence value when the sequence value is "0", it indicates an idle state in which no serial port 6 is used.
- the sequence value "1” indicates that the programmable controller is processing with the general-purpose communication protocol, and that the serial port 6 is using the general-purpose communication protocol function.
- the sequence value "2" is being processed by the programmable controller using the computer link dedicated protocol, and serial port 6 is being processed by the computer link dedicated protocol. This indicates that the tokonore function is being used.
- serial port 6 When serial port 6 is not used, the sequence value is always idle and shows "0".
- OPEN instruction shown in Fig. 2 is executed from this state, a declaration is made that serial port 6 is to be used for the general-purpose communication protocol, and serial port 6 transits while using the general-purpose communication protocol, and the sequence value changes to " 1 "
- serial port 6 can execute OUTPUT and NPUT instructions. If the sequence value is "1" and the serial port 6 is using the general-purpose communication protocol and the CLOSE instruction shown in Fig. 5 is executed, the serial port 6 transitions to the idle state and the sequence value changes. It becomes "0". By executing the CLOSE instruction, the serial port 6 is released from being occupied by the general-purpose communication protocol.
- serial port 6 When the sequence value is "1", the serial port 6 does not accept commands from external devices for use in the computer link dedicated protocol. If the sequence value is “1” and an external device issues an instruction to use serial port 6 with a computer link dedicated protocol, serial port 6 is used with an external device 10 using a computer link dedicated protocol. Tell them that it is not possible. As a result, the external device can recognize that the serial port 6 cannot be used with the computer link dedicated protocol. At this time, since the initialization contents of the serial port 6 are different, do not change the initial setting of the serial port 6 and the sequence status (use of the serial port 6).
- FIG. 8 is a diagram showing an example of a communication frame used in a computer link dedicated protocol.
- the communication frame in FIG. 8 is composed of a header and application data added at the beginning of the communication frame.
- ENQ (05H: Enquiry), which means a response request to the other party
- DLE (10H: Date Link Escae)
- communication frame STX (02H: Start) of T ext)
- ETX (03H: End of Text) characters that indicate the end of the communication frame.
- ENQ + F9H, ENQ + F8H, and DLE + STX all indicate the beginning of the communication frame. Define as a reserved word.
- serial port 6 when the sequence value of serial port 6 is in the idle state of "0", serial port 6 communicates from computer 9 or external device 10 with ENQ + F 9H, ENQ + F 8 ⁇ , or DLE + STX.
- serial port 6 transits to the state in which the computer link dedicated protocol is being used, and the sequence value becomes "2". In this state, the serial port 6 can use the dedicated protocol for the computer link using the dedicated procedure. Then, after the processing of the dedicated protocol for the computer link is completed, the serial port 6 transitions to the idle state, and the sequence value becomes "0".
- serial port 6 When the sequence value is "2", serial port 6 does not accept the OPEN instruction, CLOSE instruction, and transmission / reception instruction of the general-purpose communication protocol of serial port 6. If an OPEN instruction, a CLOSE instruction, or a general-purpose communication protocol transmission / reception instruction is issued to serial port 6 while the sequence value is "2", the general-purpose communication protocol function of serial port 6 is not valid for the user. Communicate that. This allows the user to recognize that the serial port 6 cannot be used for the general-purpose communication protocol function. If the sequence value is "2", the initialization of serial port 6 and the sequence state (use of serial port 6) should not be changed because the initialization contents of serial port 6 are different.
- FIG. 9 is a flowchart showing a processing procedure at the time of executing an instruction of a general-purpose communication protocol.
- the user has received an OPEN instruction, a CLOSE instruction, and a general-purpose communication protocol transmission / reception instruction for the serial port 6 from the serial port 6 (step S100). State if these instructions have not been executed If these instructions are executed without changing the sequence, it is checked whether the instructions are OPEN instructions or not (step S101).
- the OEPN instruction is executed on the serial port 6, it is checked whether or not the current sequence value is "0" (step S102). If the sequence value is not "0", since serial port 6 is already in use, inform the user that serial port 6 is in use and terminate the process without processing the OPEN instruction.
- serial port 6 if serial port 6 is in use, the initial settings of serial port 6 and the sequence status (use of serial port 6) are changed because the initialization contents of serial port 6 may be different. Do not let.
- step S102 if it is determined in step S102 that the sequence value is “0”, the serial number of the serial / report 6 is changed to “1” (general communication protocol is being processed) and the serial port 6 is changed. Is declared (step S103), the serial port 6 is initialized (step S104), and the process ends. This makes it possible to execute a transmission / reception instruction to the serial port 6 using the general-purpose communication protocol function.
- step S101 If it is determined in step S101 that the command to the serial port 6 is not an OPEN command, it is determined whether the command to the serial port 6 is a CLOSE command (step S105). If it is determined that the instruction to the serial port 6 is a CLOSE instruction, it is determined whether or not the current sequence number of the serial report 6 is "1" (step S106). Then, only when the sequence value of the serial port 6 is "1", the sequence value is changed to "0" (idle state) (step S107), and the occupation state of the serial port 6 by the general-purpose communication protocol function is changed. Release and end the process.
- step S106 if the sequence value is determined to be "2" instead of "1" in step S106, the user is notified that serial port 6 is being used by the computer link dedicated protocol and the CLOSE instruction is processed. The process ends without any processing.
- serial port 6 if serial port 6 is in use, the initialization of serial port 6 may be different, so the initialization The state (use of serial port 6) is not changed. If it is determined in step S103 that the sequence value is "0" instead of "1", the serial port 6 is in the idle state and the process is terminated.
- step S105 If it is determined in step S105 that the instruction to the serial port 6 is not a CLOSE instruction, the instruction is a general-purpose communication protocol transmission / reception instruction. 0 8) End the process.
- the transmission / reception instruction confirm that the sequence number is "1". If the sequence value is not "1", the user cannot use the general-purpose communication protocol. The status is notified, and the process ends without executing the process of the transmission / reception command.
- the sequence value is not "1"
- either the general-purpose communication protocol function or the computer link dedicated protocol function using the dedicated procedure can be selected and set at any time by the programmable controller itself. It is possible to use both functions at any time with a simple configuration without having to set the parameters in order.
- the programmable controller according to the present invention is useful for a programmable controller having a serial port, and in particular, a programmable controller that requires both a general-purpose communication protocol function and a computer link dedicated protocol function using a dedicated procedure. Suitable for controllers.
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- General Engineering & Computer Science (AREA)
- General Physics & Mathematics (AREA)
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- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Programmable Controllers (AREA)
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Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB0405040A GB2405500B (en) | 2003-05-28 | 2003-05-28 | Programmable controller |
JP2005500206A JP4252572B2 (ja) | 2003-05-28 | 2003-05-28 | プログラマブルコントローラ |
US10/492,626 US7797461B2 (en) | 2003-05-28 | 2003-05-28 | Programmable controller |
PCT/JP2003/006697 WO2004107698A1 (ja) | 2003-05-28 | 2003-05-28 | プログラマブルコントローラ |
DE10393401T DE10393401B4 (de) | 2003-05-28 | 2003-05-28 | Programmierbare Steuerung |
KR1020047008828A KR100628450B1 (ko) | 2003-05-28 | 2003-05-28 | 프로그래머블 컨트롤러 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2003/006697 WO2004107698A1 (ja) | 2003-05-28 | 2003-05-28 | プログラマブルコントローラ |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004107698A1 true WO2004107698A1 (ja) | 2004-12-09 |
Family
ID=32089061
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2003/006697 WO2004107698A1 (ja) | 2003-05-28 | 2003-05-28 | プログラマブルコントローラ |
Country Status (6)
Country | Link |
---|---|
US (1) | US7797461B2 (ja) |
JP (1) | JP4252572B2 (ja) |
KR (1) | KR100628450B1 (ja) |
DE (1) | DE10393401B4 (ja) |
GB (1) | GB2405500B (ja) |
WO (1) | WO2004107698A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017037550A (ja) * | 2015-08-12 | 2017-02-16 | アズビル株式会社 | エンジニアリングツール |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP4507125B2 (ja) * | 2007-09-10 | 2010-07-21 | 三菱電機株式会社 | プログラマブルコントローラ |
CN107393594A (zh) * | 2017-07-27 | 2017-11-24 | 郑州云海信息技术有限公司 | 一种多核固态硬盘调试方法及系统 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04250754A (ja) * | 1991-01-28 | 1992-09-07 | Matsushita Electric Works Ltd | プログラマブルコントローラのシリアルポートの制御方式 |
JP2001053828A (ja) * | 1999-06-17 | 2001-02-23 | Eci Telecom Ltd | 2つの動作モードを有するポートを備えるシステム |
JP2001160823A (ja) * | 1999-12-02 | 2001-06-12 | Hitachi Cable Ltd | モデム共有装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0678506B2 (ja) | 1989-05-27 | 1994-10-05 | 東リ株式会社 | 床タイル用接着剤 |
KR20000039643A (ko) | 1998-12-15 | 2000-07-05 | 홍종만 | 마이크로컨트롤러의 비동기 직렬 통신 방법 |
US6625640B1 (en) * | 1999-09-01 | 2003-09-23 | Inventec Corporation | Modem having embedded network transmission protocols |
US6826195B1 (en) * | 1999-12-28 | 2004-11-30 | Bigband Networks Bas, Inc. | System and process for high-availability, direct, flexible and scalable switching of data packets in broadband networks |
US6539030B1 (en) * | 2000-02-07 | 2003-03-25 | Qualcomm Incorporated | Method and apparatus for providing configurable layers and protocols in a communications system |
JP4147372B2 (ja) * | 2000-11-22 | 2008-09-10 | オムロン株式会社 | プログラマブル表示器およびその制御方法 |
US7116682B1 (en) * | 2001-03-19 | 2006-10-03 | Cisco Technology, Inc. | Methods and apparatus for dynamic bandwidth adjustment |
US6609185B1 (en) * | 2001-05-17 | 2003-08-19 | Emc Corporation | Data storage system having majority gate filter |
-
2003
- 2003-05-28 GB GB0405040A patent/GB2405500B/en not_active Expired - Fee Related
- 2003-05-28 WO PCT/JP2003/006697 patent/WO2004107698A1/ja active Application Filing
- 2003-05-28 JP JP2005500206A patent/JP4252572B2/ja not_active Expired - Fee Related
- 2003-05-28 US US10/492,626 patent/US7797461B2/en not_active Expired - Fee Related
- 2003-05-28 DE DE10393401T patent/DE10393401B4/de not_active Expired - Fee Related
- 2003-05-28 KR KR1020047008828A patent/KR100628450B1/ko not_active IP Right Cessation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH04250754A (ja) * | 1991-01-28 | 1992-09-07 | Matsushita Electric Works Ltd | プログラマブルコントローラのシリアルポートの制御方式 |
JP2001053828A (ja) * | 1999-06-17 | 2001-02-23 | Eci Telecom Ltd | 2つの動作モードを有するポートを備えるシステム |
JP2001160823A (ja) * | 1999-12-02 | 2001-06-12 | Hitachi Cable Ltd | モデム共有装置 |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2017037550A (ja) * | 2015-08-12 | 2017-02-16 | アズビル株式会社 | エンジニアリングツール |
Also Published As
Publication number | Publication date |
---|---|
GB0405040D0 (en) | 2004-04-07 |
JPWO2004107698A1 (ja) | 2006-07-20 |
US7797461B2 (en) | 2010-09-14 |
KR100628450B1 (ko) | 2006-09-26 |
KR20050013527A (ko) | 2005-02-04 |
GB2405500B (en) | 2006-03-15 |
JP4252572B2 (ja) | 2009-04-08 |
DE10393401T5 (de) | 2005-10-20 |
DE10393401B4 (de) | 2007-07-26 |
US20060064511A1 (en) | 2006-03-23 |
GB2405500A (en) | 2005-03-02 |
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