CN109839891A - Communication control unit - Google Patents
Communication control unit Download PDFInfo
- Publication number
- CN109839891A CN109839891A CN201811415141.4A CN201811415141A CN109839891A CN 109839891 A CN109839891 A CN 109839891A CN 201811415141 A CN201811415141 A CN 201811415141A CN 109839891 A CN109839891 A CN 109839891A
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- China
- Prior art keywords
- communication
- data
- transmission
- information
- data transmission
- Prior art date
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Classifications
-
- 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
- G05B19/054—Input/output
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- 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
- G05B19/052—Linking several PLC's
-
- 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
- G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
- G05B19/408—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by data handling or data format, e.g. reading, buffering or conversion of data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L69/00—Network arrangements, protocols or services independent of the application payload and not provided for in the other groups of this subclass
- H04L69/16—Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L12/00—Data switching networks
- H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
- H04L12/40—Bus networks
- H04L2012/40208—Bus networks characterized by the use of a particular bus standard
- H04L2012/40228—Modbus
Abstract
Communication control unit (1a) of the invention includes: communication request processing unit (11), according to write request information, production writes data into the command frame of transmission destination, and command frame is sent to PLC corresponding with workable connection with communication processing section (10-1~10-n)；Communication request processing unit (13) makes the command frame that data are read from transmission sources, and be sent to adjusting meter communication processing section (12-1~12-m) corresponding with transmission sources according to solicited message is read；And data transmission and processing portion (14), production defines the reading solicited message of transmission sources defined in information for the data transmission of data transmission definition portion (15), when receiving requested data in reading solicited message from transmission sources, the data are written to data and transmit the write request information for defining transmission destination defined in information by production.
Description
Technical field
The present invention relates to a kind of communication control units of data transmission realized between epigyny device and slave device.
Background technique
When by communicating reading and writing data to programmable logic controller (PLC) (Programmable Logic
Controller, hereinafter referred to as PLC) or when the metrical instruments such as attemperator (hereinafter referred to as adjust meter), have following logical
Believe agreement (protocol): via the revealed communication control unit of patent document 1, specifying and parameter (or the deposit in equipment
Device (register)) associated data address, it is communicated by command response (command response), and read and write the ginseng
Several values.As this communication protocol, there are 2 revealed MODBUS (registered trademark) of patent document, MC agreement, controller periphery
Link (Controller Peripheral Link, CPL) etc..
Figure 15 is the figure for illustrating the movement of the revealed communication control unit of patent document 1.In the example of fig. 15, it communicates
Control device 1 is to read data from meter 3 is adjusted using CPL, and the data of reading are written to PLC 2 using MODBUS.
PLC 2 is existed as host equipment, counts each adjust in the system that 3 are controlled by its instruction,
Each data (data of operating quantity MV or control amount PV) for adjusting meter 3 are to be read as described above by communication, and collect in PLC
In 2.
In the PLC 2 via communication control unit 1 and the communication for adjusting meter 3, existing is to utilize serial communication (serial
communication).In a case of the serial communication, as shown in figure 16, pass through life for a physical port (COM port)
The number of units for enabling response and reading the adjusting meter 3 of data is one.
That increases in recent years utilizes local area networks (Local Area such as Ethernet (Ethernet) (registered trademarks)
Network, LAN) Internet protocol (Internet protocol, IP) communication in the case where, as shown in figure 17, can be from depositing
It is that multiple adjusting meters 3 on identical LAN 4 largely and at high speed read data in parallel through command response.Communication control
It is directly proportional with the connection number of units of counting 3 is adjusted that device 1 processed to PLC 2 transmits the data volumes per unit time of data.Communication control
Device 1 and PLC's 2 can be limited by data number that command response is received and dispatched, when being more than the data number that can once exchange
When, it is necessary to be divided into multiple communication frame 5-1, communication frame 5-2 ... and sending and receiving data, when can not parallel processing when, then must be on one side
The command response of each communication frame is waited, is successively handled on one side.
About the traffic per unit time of communication control unit 1 and PLC 2, in a case of the serial communication, even if
The connection number of units for adjusting meter 3 increases, as the restriction of the quantity of communication port physically and without big variation, and in IP
In the case where communication, the traffic of communication control unit 1 and PLC2 is then increased in proportion to the connection number of units for adjusting meter 3.Its
It as a result is that in using a large amount of system for adjusting meter 3, there are the communications of communication control unit 1 and PLC 2 to become bottleneck
(bottleneck) the problem of.
As a solution of this problem, there is following method: in the communication of communication control unit 1 and PLC 2
In, it is not to wait for responding and transmitted in parallel order in command response processing.As long as example, MODBUS/ transmission control protocol
(Transmission Control Protocol, TCP) etc. has the function of frame number (frame identification marking (identity, ID))
The communication protocol of energy, so that it may once send multiple orders.
But it is possible to the specification restriction that the quantity executed parallel is intrinsic by communication protocol or equipment.If it exceeds PLC 2
Processing capacity and send order, there is TCP retransmission process can repeatedly there is a situation where and cause overall performance to decline.
Also, there is also the communication protocols for the function of not having frame number.When using this communication protocol, it is possible to because
For retransmission process etc. the sequence of frame is exchanged, therefore multiple command response processing can not be executed parallel.
[existing technical literature]
[patent document]
[patent document 1] Japanese Patent Laid-Open 2017-34433 bulletin
[patent document 2] Japanese Patent Laid-Open 2011-234171 bulletin
Summary of the invention
[problem to be solved by the invention]
The present invention be in order to solve described problem made of, and it is an object of the present invention to provide a kind of communication control unit, even if adjusting
In the increased situations of connection number of slave devices such as section meter, it can not also be restricted by communication protocol and realize epigyny device under
Efficient data transmission between the device of position.
[technical means to solve problem]
Communication control unit of the invention is characterized in that including: multiple first communication processing sections, for multiple the next dresses
Set each and be arranged, constituted in a manner of being communicated with corresponding slave device；Multiple second communication processing sections, needle
The each of the multiple connections (connection) set between epigyny device is arranged, via corresponding connection and institute
It states the mode that epigyny device is communicated and constitutes；Data transmit definition portion, the side that data transmission defines information is stored in advance
Formula and constitute；Data transmission and processing portion, is constituted in such a way: production defines in information for data transmission to be determined
The reading solicited message of the slave device of the transmission sources of justice, is asked when receiving in the reading solicited message from the transmission sources
When the data asked, the data received are written to the data to transmit by production defines transmission purpose defined in information
The write request information of the epigyny device on ground；First communication request processing unit, is constituted: in such a way according to the reading
Solicited message makes the first command frame (command frame) for reading data from the transmission sources, and is sent to and the biography
Corresponding first communication processing section in defeated source, when first communication processing section receives the first response from the transmission sources
When frame, requested Data Concurrent in the reading solicited message is taken out from first response frame and is sent to data transmission place
Reason portion；And the second communication request processing unit, it constitutes in such a way: workable when existing in the multiple connection
When connection, according to said write solicited message, production is write data into the second command frame of the transmission destination, and by institute
It states the second command frame and is sent to second communication processing section corresponding with the workable connection, when second communication
When processing unit receives the second response frame from the transmission destination, by result notice represented by second response frame to institute
State data transmission and processing portion.
Also, communication control unit of the invention is characterized in that including: multiple first communication processing sections, for it is upper
The multiple connections set between device each and be arranged, to be communicated via corresponding connect with the epigyny device
Mode and constitute；Multiple second communication processing sections, are arranged for each of multiple slave devices, to fill with corresponding bottom
It sets the mode communicated and constitutes；Data transmit definition portion, are constituted in a manner of data transmission is stored in advance and defines information；
Data transmission and processing portion, is constituted in such a way: production defines transmission defined in information for data transmission
The reading solicited message of the epigyny device in source, when receiving requested data in the reading solicited message from the transmission sources
When, the data received are written to the data and transmit the bottom for defining transmission destination defined in information by production
The write request information of device；First communication request processing unit, constitutes in such a way: depositing when in the multiple connection
In workable connection, according to the reading solicited message, the first command frame that data are read from the transmission sources is made, and
It is sent to first communication processing section corresponding with the transmission sources, when first communication processing section is from the transmission sources
When receiving the first response frame, from first response frame take out requested Data Concurrent in the reading solicited message send to
The data transmission and processing portion；And the second communication request processing unit, it constitutes: being requested according to said write in such a way
Information, production writes data into the second command frame of the transmission destination, and is sent to opposite with the transmission destination
Second communication processing section answered, when second communication processing section receives the second response frame from the transmission destination
When, give result notice represented by second response frame to the data transmission and processing portion.
Also, in a configuration example of communication control unit of the invention, the data transmission defines information together
The entry condition of information comprising the transmission sources, the information of the transmission destination and data transmission, and it is set with data biography
The defeated period, as the entry condition.
Also, in a configuration example of communication control unit of the invention, the data transmission defines information together
The entry condition of information comprising the transmission sources, the information of the transmission destination and data transmission, and it is set with triggering letter
Breath, as the entry condition.
Also, a configuration example of communication control unit of the invention is characterized in that, at one of the epigyny device
The multiple connection is set in communication port.
Also, a configuration example of communication control unit of the invention is characterized in that, in the multiple of the epigyny device
The connection is respectively set in communication port.
[The effect of invention]
According to the present invention, it is communicated and setting multiple connections between communication control unit and epigyny device, it can
By multiple command frames via multiple connection transmitted in parallel to epigyny device, therefore even if slave device the increased feelings of connection number
Under condition, it can not also be restricted by communication protocol and realize the efficient data between epigyny device and slave device and transmit.
Detailed description of the invention
Fig. 1 is the figure for illustrating the principle of the present invention.
Fig. 2 is the block diagram for indicating the composition of communication control unit of the first embodiment of the present invention.
Fig. 3 is to illustrate to set multiple connections on a TCP communication port of PLC in the first embodiment of the present invention
Exemplary figure.
Fig. 4 is the number stored in the data transmission definition portion for indicate the communication control unit of the first embodiment of the present invention
The figure of information is defined according to transmission.
Fig. 5 is the process for illustrating the movement in data transmission and processing portion of the communication control unit of the first embodiment of the present invention
Figure.
Fig. 6 be illustrate the first embodiment of the present invention communication control unit adjusting meter communication request processing unit and
The flow chart of the movement of communication processing section.
Fig. 7 is to illustrate the communication request processing unit of the PLC of communication control unit of the first embodiment of the present invention and lead to
Believe the flow chart of the movement of processing unit.
Fig. 8 is the precedence diagram for illustrating the movement of communication control unit of the first embodiment of the present invention.
Fig. 9 is the precedence diagram for illustrating the movement of existing communication control unit.
Figure 10 is to illustrate respectively to set a company on multiple TCP communication ports of PLC in the second embodiment of the present invention
The exemplary figure connect.
Figure 11 is stored in the data transmission definition portion for indicate the communication control unit of the third embodiment of the present invention
Data transmission defines the figure of information.
Figure 12 is to illustrate the communication request processing unit of the PLC of communication control unit of the third embodiment of the present invention and lead to
Believe the flow chart of the movement of processing unit.
Figure 13 is the communication request processing unit for illustrating the adjusting meter of the communication control unit of the third embodiment of the present invention
And the flow chart of the movement of communication processing section.
Figure 14 is the computer for indicating to realize the first embodiment of the present invention~3rd embodiment communication control unit
The block diagram of configuration example.
Figure 15 is the figure for illustrating the movement of existing communication control unit.
Figure 16 is figure of the explanation using the PLC of serial communication and the communication for adjusting meter.
Figure 17 is figure of the explanation using the PLC of LAN and the communication for adjusting meter.
[explanation of symbol]
1,1a: communication control unit
2:PLC
3,3-1~3-m: meter is adjusted
4:LAN
5-1,5-2: communication frame
10-1~10-n:PLC communication processing section
11,13: communication request processing unit
12-1~12-m: meter communication processing section is adjusted
14: data transmission and processing portion
15: data transmit definition portion
100-1~100-n, 101-1~101-m, 200,200-1~200-n, 300-1~300-m:TCP communication port
400:CPU
401: storage device
402: interface arrangement (I/F)
Cc-1~Cc-3, Pc-1~Pc-3: command frame
Ccon-1~Ccon-m, Pcon-1~Pcon-n: connection
Cr-1~Cr-3, Pr-1~Pr-3: response frame
S100~S108, S200~S209, S300~S309, S400~S409, S500~S509: step
Specific embodiment
[principle of invention]
Fig. 1 is the figure for illustrating the principle of the present invention.When being communicated with PLC, even if being in available communication protocol
Can not be in the case where parallel exectorial agreement, there is also the specifications as PLC, can be on a TCP communication port really
The case where standing multiple connections.Also, even if there is also can use multiple TCP simultaneously in the case where only allowing singular association
The case where communication port.The specification of these PLC is to imagine multiple equipment (touch panel or computer etc.) being connected to the rule of PLC
Lattice.
In the present invention, by utilizing the technology that can establish simultaneously multiple connections between PLC, communication control unit 1a
It is parallel to multiple connections to execute command response processing, it is wasted time caused by the response from PLC waits to delete.
[first embodiment]
Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.Fig. 2 is to indicate leading to for the first embodiment of the present invention
Believe the block diagram of the composition of control device 1a.Communication control unit 1a includes: that n PLC is communicated with communication processing section 10-1~PLC
Processing unit 10-n (integer that n is 2 or more), connect via networks such as Ethernets with PLC 2, for set between PLC 2
Multiple connections each and be arranged, communicated via corresponding connection with PLC 2；Communication request processing unit 11, according to
Write request information from aftermentioned data transmission and processing portion makes the command frame to transmission destination write-in data, will order
Frame is sent to PLC communication processing section 10-1~PLC communication processing section 10-n corresponding with workable connection, works as PLC
When receiving response frame with communication processing section 10-n with communication processing section 10-1~PLC, by result represented by the response frame
It notifies to give data transmission and processing portion；M adjusting meter communication processing section 12-1~adjusting meter communication processing section 12-m (m be 2 with
On integer), for each adjusting count 3-1~adjusting meter 3-m and be arranged, via the networks such as Ethernet and adjust meter 3-1~tune
Section meter 3-m connection；Communication request processing unit 13 makes according to the reading solicited message from data transmission and processing portion from transmission
Source reads the command frame of data, and is sent to adjusting meter communication processing section 12-1 corresponding with transmission sources~adjusting meter and uses and lead to
Believe processing unit 12-m, when adjusting meter receives response frame with communication processing section 12-m with communication processing section 12-1~adjusting meter,
Requested Data Concurrent in reading solicited message is taken out from response frame to send to data transmission and processing portion；Data transmission and processing portion
14, production defines the reading solicited message of transmission sources defined in information for data transmission, when receiving institute from transmission sources
When stating requested data in reading solicited message, the data received are written to data to transmit and be defined in information by production
The write request information of defined transmission destination；And data transmit definition portion 15, and the letter comprising transmission sources is stored in advance
The data transmission of the entry condition of breath, the information of transmission destination and data transmission defines information.
In the present embodiment, the case where being described as follows: as shown in figure 3, the specification as PLC 2, allows logical in a TCP
Believe and establishes multiple connection Pcon-1~connection Pcon-n on port 200.100-1~100-n in Fig. 3 is communication control dress respectively
Set the TCP communication port set in communication processing section 10-1~PLC communication processing section 10-n the PLC of 1a, 101-1~
101-m is institute in adjusting meter communication processing section 12-1~adjusting meter communication processing section 12-m of communication control unit 1a respectively
The TCP communication port of setting, 300-1~300-m are to adjust the meter TCP communication port 3-1~adjusting meter 3-m, Ccon-1 respectively
~Ccon-m is in TCP communication port 101-1~TCP communication port 101-m and TCP communication port 300-1~TCP communication port
Set connection between 300-m.
In data transmission definition portion 15, stores in advance data transmission as shown in Figure 4 and define information.Data transmission is fixed
Adopted information include data transmission entry condition, the address information of data transmission sources (the present embodiment for adjust meter 3-1~adjusting
Count 3-m monitoring point or specified data address) and the address information of data transmission destination (be in the present embodiment PLC
The address of 2 register).
In the example of fig. 4, be by data transmission period definition be data transmission entry condition, and know every
200msec just carries out data transmission.This data transmission, which defines information, to be logged in advance by the user of communication control unit 1a.
Fig. 5 is the flow chart for illustrating the movement in the data transmission and processing portion 14 of communication control unit 1a of the present embodiment, Fig. 6
It is to illustrate communication request processing unit 13 and adjusting meter communication processing section 12-1~adjusting meter communication processing section 12-m movement
Flow chart, Fig. 7 is to illustrate communication request processing unit 11 and PLC communication processing section 10-1~PLC communication processing section 10-n
Movement flow chart.
Data transmission and processing portion 14 carry out it is standby, until data transmission definition portion 15 data transmission define information in determine
Until the entry condition of justice is set up.
Data transmission and processing portion 14 should implement the timing (timing) of data transmission reaching, when entry condition is set up (
It is yes in Fig. 5 step S100), it is transmitted based on data and defines transmission source address information defined in information, production is for from number
The reading solicited message (Fig. 5 step S101) of data is read according to transmission sources.In reading solicited message, include transmission source address letter
Breath.
Then, made reading solicited message is sent to and transmits definition information with data by data transmission and processing portion 14
Defined in the corresponding communication request processing unit of data transmission sources (being in the present embodiment communication request processing unit 13) (figure
5 step S102).
The processing of step S101, step S102 is repeated in data transmission and processing portion 14, until for data transmission definition
All groups of data transmission sources and data transmission destination defined in information, read solicited message transmission terminate until
(being yes in Fig. 5 step S103).
Secondly, communication request processing unit 13 when receiving the reading solicited message from data transmission and processing portion 14 (
It is yes in Fig. 6 step S200), the reading solicited message will receive is saved to the communication request queue (request of inside
Queue) the communication request queue processing (Fig. 6 step S201) of (not shown).
When then, communication request processing unit 13 preserves untreated reading solicited message in communication request queue (
It is yes in Fig. 6 step S202), using untreated reading solicited message as process object, determine and the reading solicited message
Contained in transmission source address information between the adjusting meter 3 (3-1~3-m) of the specific data transmission sources of institute whether in communicating
In processing (Fig. 6 step S203).
(it is in step S203 when communication request processing unit 13 is not in communication process between data transmission sources
It is no), the reading solicited message based on process object makes command frame (Fig. 6 step for reading data from data transmission sources
S204).In command frame, include transmission source address information.
Then, made command frame is sent to data transmission sources (in the present embodiment by communication request processing unit 13
To adjust meter) corresponding adjusting meter communication processing section 12 (12-1~12-m).Adjust meter with communication processing section 12 (12-1~
12-m) the command frame that will be received is sent out via the connection Ccon (Ccon-1~Ccon-m) set between data transmission sources
It send to the adjusting meter 3 (3-1~3-m) (Fig. 6 step S205) of data transmission sources.
3 (3-1~3-m) of meter are adjusted when receiving command frame, are obtained in the command frame received from internal memory
Specified data in contained transmission source address information, production include the response frame of the data.Then, 3 (3-1 of meter are adjusted
~3-m) by made response frame, the connection Ccon that is set between the communication control unit 1a via the transmission source of command frame
(Ccon-1~Ccon-m) and be sent to communication control unit 1a.
The adjusting meter communication processing section 12 (12-1~12-m) of the communication control unit 1a of command frame has been sent from tune
When 3 (3-1~3-m) of section meter receive the response frame for the command frame (being yes in Fig. 6 step S206), by what is received
Response frame is sent to communication request processing unit 13.
Communication request processing unit 13 analyzes response frame, takes out the 3 (3- of adjusting meter from data transmission sources from response frame
1~3-m) send data (Fig. 6 step S207).The data that communication request processing unit 13 will take out from response frame, as processing
Requested result in the reading solicited message of object and be sent to data transmission and processing portion 14 (Fig. 6 step S208).
Then, the requested result in the reading solicited message by process object of communication request processing unit 13 is sent to number
After transmission process portion 14, the reading solicited message (Fig. 6 step S209) is deleted from internal communication request queue, and return
It is back to step S200.
Secondly, data transmission and processing portion 14 from communication request processing unit 13 receive read solicited message in it is requested
When as a result (being yes in Fig. 5 step S104), transmitted based on the data for making the raw information for reading solicited message are become
Transmission destination address information defined in information is defined, is made for writing data into the write-in of data transmission destination
Solicited message (Fig. 5 step S105).In write request information, transmitted comprising transmission destination address information and from data
The data that the adjusting meter 3 (3-1~3-m) in source is sent.
Then, made write request information is sent to and transmits definition information with data by data transmission and processing portion 14
Defined in the corresponding communication request processing unit of data transmission destination (be in the present embodiment communication request processing unit
11) (Fig. 5 step S106).
Secondly, communication request processing unit 11 when receiving the write request information from data transmission and processing portion 14 (
It is yes in Fig. 7 step S300), carry out the communication request queue (not shown) of the write request information preservation that will be received to inside
Communication request queue processing (Fig. 7 step S301).
When then, communication request processing unit 11 preserves untreated write request information in communication request queue (
It is yes in Fig. 7 step S302), using untreated write request information as process object, determine and said write solicited message
Contained in transmission destination address information the specific data transmission destination of institute (be between PLC 2) in the present embodiment
It is no to be in communication process (Fig. 7 step S303).
In the present embodiment, multiple connection Pcon-1~connections are set between communication control unit 1a and PLC 2
Pcon-n, therefore when using all connection Pcon-1~connection Pcon-n, it can become in this judgement in communication process
As a result, then becoming and being not in communication process when at least one connection is not used among connection Pcon-1~connection Pcon-n
This judgement result.
When communication request processing unit 11 is not in communication process between data transmission destination, i.e., in multiple connections
There are (being no in step S303) when workable connection in Pcon-1~connection Pcon-n, the write-in based on process object is asked
Information is sought, is made for the command frame (Fig. 7 step S304) to data transmission destination write-in data.In command frame, include
Transmission destination address information and the data sent from the adjusting meter 3 (3-1~3-m) of data transmission sources.
Then, made command frame is sent to data transmission destination (in this implementation by communication request processing unit 11
PLC corresponding to workable connection is used among the multiple connection Pcon-1~connection Pcon-n set between PLC 2) in example
Communication processing section 10 (10-1~10-n).PLC is with communication processing section 10 (10-1~10-n) via corresponding connection Pcon
Command frame is sent to the PLC 2 (Fig. 7 step S305) of data transmission destination by (Pcon-1~Pcon-n).
PLC 2 is when receiving command frame, using the connection Pcon (Pcon-1~Pcon-n) for receiving command frame, by table
Show that the response frame for having received command frame send back to communication control unit 1a.Also, PLC 2 will be counted contained in the command frame
According to the write-in register specified into transmission destination address information contained in the command frame received.
In this way, the data for adjusting 3 (3-1~3-m) of meter can be transmitted to PLC 2.
The PLC of the communication control unit 1a of command frame has been sent with communication processing section 10 (10-1~10-n) from PLC 2
When receiving the response frame for the command frame (being yes in Fig. 7 step S306), the response frame received is sent to logical
Letter request processing unit 11.
Communication request processing unit 11 is analyzed (Fig. 7 step S307) to response frame, when confirmation data transmission destination
When PLC 2 receives command frame, the information terminated is handled by requested in the write request information for indicating process object, is made
Data transmission and processing portion 14 (Fig. 7 step S308) is sent to for requested result in the write request information of process object.
Then, the requested result in the write request information by process object of communication request processing unit 11 is sent to number
After transmission process portion 14, said write solicited message (Fig. 7 step S309) is deleted from internal communication request queue, and return
It is back to step S300.
Data transmission and processing portion 14 is receiving requested result in write request information from communication request processing unit 11
When (being yes in Fig. 5 step S107), transmit defining data transmission sources and data defined in information and transmit mesh for data
All groups on ground determine whether data transmission has terminated (Fig. 5 step S108).
Data transmission and processing portion 14 is defining data transmission sources defined in information and data transmission for data transmission
All groups of destination are back to step S104 when data transmission is not finished (being no in step S108).Also, data
Transmission process portion 14 is defining all of data transmission sources and data transmission destination defined in information for data transmission
Group be back to step S100 at the end of data transmission (being yes in step S108), and standby open until next
Until dynamic condition is set up.
Fig. 8 is the precedence diagram for illustrating the movement of communication control unit 1a of the present embodiment.In the example of fig. 8, illustrate
There are three connect Pcon-1~connection Pcon-3 for setting between communication control unit 1a and PLC 2.
By Fig. 5, movement illustrated in fig. 6, communication control unit 1a sends and uses to meter 3-1~adjusting meter 3-3 is adjusted
In the command frame Cc-1~command frame Cc-3 for reading data.For the command frame Cc-1~command frame Cc-3, adjust meter 3-1~
It adjusts meter 3-3 and response frame Cr-1~response frame Cr-3 comprising requested data is sent back to communication control unit 1a.
Then, communication control unit 1a is by command frame Pc-1~command frame Pc-3, via three connection Pcon-1~connections
Pcon-3 and transmitted in parallel to PLC 2, response frame Cr-1 of the command frame Pc-1~command frame Pc-3 for that will receive~
Data contained in response frame Cr-3 are written to PLC 2.Expression is had received command frame Pc-1~command frame Pc-3 by PLC 2
Response frame Pr-1~response frame Pr-3 send back to communication control unit 1a via connection Pcon-1~connection Pcon-3 respectively.
Fig. 9 is the precedence diagram for illustrating the movement of existing communication control unit 1.On existing, communication control unit 1 and tune
Command response processing between section meter 3-1~adjusting meter 3-3 is also identical as the present embodiment.
On the other hand, for a connection Pcon-1 between communication control unit 1 and PLC 2, is only set with, so communication
Control device 1 is directed to the response frame Pr-1 of command frame Pc-1 until receiving, and Next Command frame Pc-2 could be sent to PLC
2.Similarly, communication control unit 1 is directed to the response frame Pr-2 of command frame Pc-2 until receiving, could be by Next Command frame
Pc-3 is sent to PLC 2.As described above, in existing communication control unit 1, it is known that multiple command responses can not be executed parallel
Processing.
As previously discussed, in the present embodiment, and setting multiple connections between communication control unit 1a and PLC 2
It is communicated, the efficient data that the PLC 2 via communication control unit 1a may be implemented and adjust 3 (3-1~3-m) of meter pass
It is defeated.The communication protocol of PLC 2 or adjust 3 (3-1~3-m) of meter as long as communication protocol using TCP/IP communication communication protocols
View can be using the present invention no matter the type of communication protocol.Therefore, can not be restricted by communication protocol and
Realize efficient data transmission.
[second embodiment]
In the first embodiment, it is stated that following situation: as the specification of PLC 2, allowing a TCP communication port
Multiple connection Pcon-1~connection Pcon-n are established on 200.In contrast, also the present invention can be applied to following situations:
As shown in Figure 10, the specification as PLC 2 only allows to establish a connection on each TCP communication port, but can set more
A TCP communication port 200-1~TCP communication port 200-n, can be in each TCP communication port 200-1~TCP communication port
Connection Pcon-1~connection Pcon-n is established on 200-n respectively.
In the example depicted in fig. 10, the composition of communication control unit 1a and movement are also as illustrated in first embodiment.
Also, also the present invention can be applied to following situations: as the specification of PLC 2, it is logical can to set multiple TCP
Believe port, and allows to establish multiple connections on each TCP communication port.
[3rd embodiment]
In first embodiment, second embodiment, it is stated that being the starting that data are transmitted by the period definition of data transmission
The case where condition, but can also be as shown in figure 11, triggering information is defined as entry condition.In the example of fig. 11, in PLC
2 when specific register becomes that (ON) is connected with this address M001, entry condition is set up, and starts data transmission.Also,
It is to illustrate that adjusting meter 3-1~adjusting meter 3-m is transmission sources, PLC 2 is transmission purpose in first embodiment, second embodiment
The case where ground, but can also be as shown in figure 11, PLC 2 is transmission sources, and adjusting meter 3-1~adjusting meter 3-m is transmission destination.
In the present embodiment, the composition of communication control unit 1a is also identical as first embodiment, second embodiment, therefore benefit
With the symbol of Fig. 2, illustrate to transmit that leading to when data transmission as shown in figure 11 defines information is stored in definition portion 15 in data
Believe the movement of control device 1a.
The process of the processing in data transmission and processing portion 14 is identical with the first embodiment, therefore is said using the symbol of Fig. 5
It is bright.Figure 12 is to illustrate communication request processing unit 11 and the PLC movement of communication processing section 10-1~PLC communication processing section 10-n
Flow chart, Figure 13 be illustrate communication request processing unit 13 and adjust meter communication processing section 12-1~adjusting meter communication process
The flow chart of the movement of portion 12-m.
In PLC 2, with this address M001, specific register becomes that (ON) is connected in data transmission and processing portion 14, opens
When dynamic condition is set up (being yes in Fig. 5 step S100), is transmitted based on data and define the letter of transmission source address defined in information
Breath, production read solicited message (Fig. 5 step S101).Furthermore the state of the register of PLC 2 can be handled via communication request
Portion 11 and PLC are regularly monitored with communication processing section 10 (10-1~10-n).
Then, made reading solicited message is sent to and transmits definition information with data by data transmission and processing portion 14
Defined in the corresponding communication request processing unit of data transmission sources (being in the present embodiment communication request processing unit 11) (figure
5 step S102).
Secondly, communication request processing unit 11 when receiving the reading solicited message from data transmission and processing portion 14 (
It is yes in Figure 12 step S400), the reading solicited message will receive is saved to the communication of the communication request queue of inside
Request queue handles (Figure 12 step S401).
When then, communication request processing unit 11 preserves untreated reading solicited message in communication request queue (
It is yes in Figure 12 step S402), using untreated reading solicited message as process object, determine and the reading solicited message
Contained in transmission source address information between the specific data transmission sources of institute whether in (Figure 12 step in communication process
S403)。
When communication request processing unit 11 is not in communication process between the PLC 2 of data transmission sources, that is, multiple
There are (being no in step S403), the readings based on process object when workable connection in connection Pcon-1~connection Pcon-n
Solicited message out makes the command frame (Figure 12 step S404) for reading data from data transmission sources.
Then, made command frame is sent to data transmission sources (in the present embodiment by communication request processing unit 11
PLC corresponding to workable connection is communicated among the multiple connection Pcon-1~connection Pcon-n set between PLC 2)
Processing unit 10 (10-1~10-n).PLC is with communication processing section 10 (10-1~10-n) via corresponding connection Pcon (Pcon-1
~Pcon-n) command frame is sent to the PLC 2 (Figure 12 step S405) of data transmission sources.
PLC 2 obtains transmission sources contained in the command frame received from internal memory when receiving command frame
Specified data in address information, production include the response frame of the data.Then, PLC 2 is utilized and is received command frame
It connects Pcon (Pcon-1~Pcon-n), response frame is sent back to communication control unit 1a.
The PLC of the communication control unit 1a of command frame has been sent with communication processing section 10 (10-1~10-n) from PLC 2
It receives (being yes in Figure 12 step S406) after the response frame for the command frame, the response frame received is sent to
Communication request processing unit 11.
Communication request processing unit 11 analyzes response frame, and takes out from response frame from the PLC 2 of data transmission sources and send out
The data (Figure 12 step S407) sent.The data that communication request processing unit 11 will take out from response frame, the reading as process object
Out in solicited message requested result and be sent to data transmission and processing portion 14 (Figure 12 step S408).
Then, the requested result in the reading solicited message by process object of communication request processing unit 11 is sent to number
After transmission process portion 14, the reading solicited message (Figure 12 step S409) is deleted from internal communication request queue, and
It is back to step S400.
Secondly, data transmission and processing portion 14 from communication request processing unit 11 receive read solicited message in it is requested
When as a result (being yes in the step S104 of Fig. 5), passed based on the data for making the raw information for reading solicited message are become
Transmission destination address information defined in defeated definition information makes for writing data into writing to data transmission destination
Enter solicited message (Fig. 5 step S105).In write request information, passed comprising transmission destination address information and from data
The data that the PLC 2 in defeated source is sent.
Then, made write request information is sent to and transmits definition information with data by data transmission and processing portion 14
Defined in the corresponding communication request processing unit of data transmission destination (be in the present embodiment communication request processing unit
13) (Fig. 5 step S106).
Secondly, communication request processing unit 13 when receiving the write request information from data transmission and processing portion 14 (
It is yes in Figure 13 step S500), carry out the communication of the communication request queue of the write request information preservation that will be received to inside
Request queue handles (Figure 13 step S501).
When then, communication request processing unit 13 preserves untreated write request information in communication request queue (
It is yes in Figure 13 step S502), using untreated write request information as process object, determine and said write solicited message
Contained in the specific data transmission destination of institute in transmission destination address information (in the present embodiment for adjust meter 3-1~
Adjust meter 3-m) between whether in the communication process (Figure 13 step S503).
When communication request processing unit 13 is not in communication process between data transmission destination (in step S503
It is no), the write request information based on process object makes for writing data into the command frame of data transmission destination
(Figure 13 step S504).In command frame, sent comprising transmission destination address information and from the PLC 2 of data transmission sources
Data.
Then, made command frame is sent to data transmission destination (in this implementation by communication request processing unit 13
To adjust meter in example) corresponding adjusting meter communication processing section 12 (12-1~12-m).Adjust meter communication processing section 12
The command frame that (12-1~12-m) will be received, via the connection Ccon (Ccon-1~Ccon- set between data transmission sources
M) it is sent to the adjusting meter 3 (3-1~3-m) (Figure 13 step S505) of data transmission sources.
3 (3-1~3-m) of meter are adjusted when receiving command frame, will indicate that the response frame for having received command frame is sent back to
Communication control unit 1a.Also, it adjusts 3 (3-1~3-m) of meter data contained in the command frame are written to the life received
Enable register specified in transmission destination address information contained in frame.
The adjusting meter communication processing section 12 (12-1~12-m) of the communication control unit 1a of command frame has been sent from tune
When 3 (3-1~3-m) of section meter receive the response frame for the command frame (being yes in the step S506 of Figure 13), it will receive
To response frame be sent to communication request processing unit 13.
Communication request processing unit 13 is analyzed (Figure 13 step S507) to response frame, when confirmation data transmission destination
When 3 (3-1~3-m) of adjusting meter receive command frame, it will indicate that requested processing is in the write request information of process object
The information of end is sent to data transmission and processing portion 14 as requested result in the write request information of process object
(Figure 13 step S508).
Then, the requested result in the write request information by process object of communication request processing unit 13 is sent to number
After transmission process portion 14, said write solicited message (Figure 13 step S509) is deleted from internal communication request queue, and
It is back to step S500.
Data transmission and processing portion 14 is receiving requested result in write request information from communication request processing unit 13
When (being yes in Fig. 5 step S107), transmit defining data transmission sources and data defined in information and transmit mesh for data
Ground all groups, determine data transmission whether terminate (Fig. 5 step S108).
Data transmission and processing portion 14 is defining data transmission sources defined in information and data transmission for data transmission
All groups of destination are back to step S104 when data transmission is not finished (being no in step S108).Also, data
Transmission process portion 14 is defining all of data transmission sources and data transmission destination defined in information for data transmission
Group be back to step S100 at the end of data transmission (being yes in step S108), and standby open until next
Until dynamic condition is set up.
So, in the present embodiment, the data of PLC 2 can be transmitted to 3 (3-1~3-m) of adjusting meter.
It furthermore in the present embodiment, is to be stepped on using using the information of the event of specified 2 side PLC generation as triggering information
The example recorded to data transmission definition portion 15 is illustrated, but also can be set to and 3-1~adjusting meter for example is counted in specified adjusting
The information of the generation of the specific alarm or event of 3-3 logs on to data transmission definition portion 15 as triggering information.Adjust meter 3
The state of (3-1~3-m) can via communication request processing unit 13 and adjust meter communication processing section 12 (12-1~12-m) and
Regularly monitor.
That PLC 2 is set as epigyny device in first embodiment~3rd embodiment, by multiple adjustings count 3 (3-1~
It 3-m) is set as slave device, but be not restricted to that this.Such as epigyny device and each of multiple slave devices are also possible to PLC.
It is the movement for illustrating to have established after connection also, in first embodiment~3rd embodiment, but certainly,
The establishment connected in TCP/IP communication is well-known technology.
Also, when for command frame transmission, when response frame is not sent back to before the deadline, certainly as it is well known,
It will do it the retransmission process of command frame.
Communication control unit 1a illustrated in first embodiment~3rd embodiment can be by including central processing unit
The computer of (Central Processing Unit, CPU), storage device and interface (interface) and hard to these
Program that part resource is controlled is realized.The composition of the computer is illustrated in Figure 14.Computer includes CPU 400, deposits
Storage device 401 and interface arrangement (being below slightly I/F) 402.On I/F 402, it is connected to PLC 2 and adjusts meter 3-1~tune
Section meter 3-3.In this computer, the program for realizing the present invention is stored in storage device 401.CPU 400 is pressed
According to the program saved in storage device 401, the processing illustrated in first embodiment~3rd embodiment is executed.
[industrial utilizability]
The present invention can be applied to the technology carried out data transmission between epigyny device and slave device.
Claims (10)
1. a kind of communication control unit, characterized by comprising:
Multiple first communication processing sections, are arranged for each of multiple slave devices, to carry out with corresponding slave device
The mode of communication and constitute；
Multiple second communication processing sections are arranged, via phase for each of the multiple connections set between epigyny device
Corresponding connection and mode that the epigyny device is communicated and constitute；
Data transmit definition portion, are constituted in a manner of data transmission is stored in advance and defines information；
Data transmission and processing portion, is constituted in such a way: production defines defined in information for data transmission
The reading solicited message of the slave device of transmission sources, it is requested in the reading solicited message when being received from the transmission sources
When data, the data received are written to the data to transmit by production defines transmission destination defined in information
The write request information of epigyny device；
First communication request processing unit, is constituted in such a way: according to the reading solicited message, being made from the transmission
Source reads the first command frame of data, and is sent to first communication processing section corresponding with the transmission sources, when described
When first communication processing section receives the first response frame from the transmission sources, the reading request is taken out from first response frame
Requested Data Concurrent is sent to the data transmission and processing portion in information；And
Second communication request processing unit, is constituted in such a way: when in the multiple connection there are when workable connection,
According to said write solicited message, production is write data into the second command frame of the transmission destination, and by described second
Command frame is sent to second communication processing section corresponding with the workable connection, when second communication processing section
When receiving the second response frame from the transmission destination, result notice represented by second response frame is given to the data
Transmission process portion.
2. a kind of communication control unit, characterized by comprising:
Multiple first communication processing sections are arranged, via phase for each of the multiple connections set between epigyny device
Corresponding connection and mode that the epigyny device is communicated and constitute；
Multiple second communication processing sections, are arranged for each of multiple slave devices, to carry out with corresponding slave device
The mode of communication and constitute；
Data transmit definition portion, are constituted in a manner of data transmission is stored in advance and defines information；
Data transmission and processing portion, is constituted in such a way: production defines defined in information for data transmission
The reading solicited message of the epigyny device of transmission sources, it is requested in the reading solicited message when being received from the transmission sources
When data, the data received are written to the data to transmit by production defines transmission destination defined in information
The write request information of slave device；
First communication request processing unit, is constituted in such a way: when there are workable connections in the multiple connection
When, according to the reading solicited message, the first command frame that data are read from the transmission sources is made, and be sent to and the biography
Corresponding first communication processing section in defeated source, when first communication processing section receives the first response from the transmission sources
When frame, requested Data Concurrent in the reading solicited message is taken out from first response frame and is sent to data transmission place
Reason portion；And
Second communication request processing unit, is constituted in such a way: according to said write solicited message, production is write data into
Extremely the second command frame of the transmission destination, and it is sent to second communication process corresponding with the transmission destination
Portion, when second communication processing section receives the second response frame from the transmission destination, by the second response frame institute
The result notice of expression gives the data transmission and processing portion.
3. communication control unit according to claim 1 or 2, which is characterized in that
It includes the information of the transmission sources, the information and data of the transmission destination that the data transmission defines information together
The entry condition of transmission,
It is set with the period of data transmission, as the entry condition.
4. communication control unit according to claim 1 or 2, which is characterized in that
It includes the information of the transmission sources, the information and data of the transmission destination that the data transmission defines information together
The entry condition of transmission,
It is set with triggering information, as the entry condition.
5. communication control unit according to claim 1 or 2, which is characterized in that
The multiple connection is set in a communication port of the epigyny device.
6. communication control unit according to claim 1 or 2, which is characterized in that
The connection is respectively set in multiple communication port of the epigyny device.
7. communication control unit according to claim 3, which is characterized in that
The multiple connection is set in a communication port of the epigyny device.
8. communication control unit according to claim 3, which is characterized in that
The connection is respectively set in multiple communication port of the epigyny device.
9. communication control unit according to claim 4, which is characterized in that
The multiple connection is set in a communication port of the epigyny device.
10. communication control unit according to claim 4, which is characterized in that
The connection is respectively set in multiple communication port of the epigyny device.
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| Publication number | Publication date |
|---|---|
| TW201926974A (en) | 2019-07-01 |
| JP2019097085A (en) | 2019-06-20 |
| TWI688248B (en) | 2020-03-11 |
| CN109839891B (en) | 2021-08-17 |
| KR20190062214A (en) | 2019-06-05 |
| JP7034681B2 (en) | 2022-03-14 |
| KR102136184B1 (en) | 2020-07-22 |
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