CN112165422B - Automatic address matching method for one-master multi-slave temperature control system - Google Patents
Automatic address matching method for one-master multi-slave temperature control system Download PDFInfo
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- CN112165422B CN112165422B CN202011040754.1A CN202011040754A CN112165422B CN 112165422 B CN112165422 B CN 112165422B CN 202011040754 A CN202011040754 A CN 202011040754A CN 112165422 B CN112165422 B CN 112165422B
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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
- H04L12/40006—Architecture of a communication node
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5038—Address allocation for local use, e.g. in LAN or USB networks, or in a controller area network [CAN]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5046—Resolving address allocation conflicts; Testing of addresses
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L67/00—Network arrangements or protocols for supporting network services or applications
- H04L67/01—Protocols
- H04L67/12—Protocols specially adapted for proprietary or special-purpose networking environments, e.g. medical networks, sensor networks, networks in vehicles or remote metering networks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D19/00—Arrangements of controlling devices
- F27D2019/0003—Monitoring the temperature or a characteristic of the charge and using it as a controlling value
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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
- H04L2012/40215—Controller Area Network CAN
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention relates to an address automatic matching method of a master multi-slave temperature control system, which comprises a heating furnace and the temperature control system, wherein the heating furnace is provided with a temperature control device, and the temperature control system comprises a master controller and a plurality of slave controllers; the main controller and each slave controller are provided with a control unit and CAN modules connected with the control unit, adjacent slave controllers are connected through bidirectional transmission lines connected with the CAN modules, and the CAN module of the main controller is connected with the CAN module of the first slave controller through the bidirectional transmission lines; the main controller is also provided with an Ethernet communication module used for communicating with an external monitoring terminal, the Ethernet communication module is connected with the control unit arranged on the main controller, and the control unit arranged on each slave controller is respectively connected with different temperature control devices. Meanwhile, the invention also relates to a method for automatically matching addresses by using the temperature control system, which solves the problem that the addresses can only be manually allocated.
Description
Technical Field
The invention belongs to the technical field of control systems, and particularly relates to an address automatic matching method of a one-master multi-slave temperature control system.
Background
The heating furnace is applied to various industrial fields such as petroleum, chemical industry, metallurgy, machinery, heat treatment, surface treatment, building materials, electronics, materials, light industry, daily chemicals, pharmacy and the like. In order to ensure the product quality, the operation state of each heating furnace needs to be closely monitored, but the number of the heating furnaces is large, the requirement cannot be answered far by adopting a manual recording mode, and the phenomenon of missing detection is easy to occur.
With the advancement of technology, the operation of the heating furnace is gradually separated from a single operation mode, and when one host controller is connected to a plurality of heating furnaces, each heating furnace is required to have an exact and unrepeated address code, otherwise, the heating furnace cannot be used. At present, common communication address allocation methods include dial setting, specific program menu setting, manual one-by-one setting of non-repetitive addresses and the like, which all require manual operation, are relatively complicated in operation, consume a lot of time for operating personnel, and have hidden dangers of wrong dial or wrong setting in manual operation.
Disclosure of Invention
The invention aims to provide a one-master multi-slave temperature control system to solve the problem that address allocation can only be realized through manual operation in the prior art, and simultaneously provides an automatic address matching method using the temperature control system.
In order to solve the above problems, the present invention provides a master-slave temperature control system, which comprises a heating furnace and a temperature control system, wherein the heating furnace is provided with a temperature control device for regulating and controlling temperature and heating, and the temperature control system comprises a master controller and a plurality of slave controllers; the master controller and each slave controller are provided with a control unit and a CAN module connected with the control unit, adjacent slave controllers are connected through a bidirectional transmission line connected with the CAN modules, and the CAN module of the master controller is connected with the CAN module of the first slave controller through the bidirectional transmission line; the main controller is also provided with an Ethernet communication module used for communicating with an external monitoring terminal, the Ethernet communication module is connected with the control unit arranged on the main controller, and the control unit arranged on each slave controller is respectively connected with different temperature control devices.
As a further technical solution of the present invention, all the CAN modules include an analysis end and a transceiver end, the analysis end is composed of a decoding unit and an encoding unit, the transceiver end is composed of a receiving area and a transmitting area, the receiving area is provided with an input pin, and the transmitting area is provided with an output pin; the control unit is connected with the receiving area through the decoding unit, and the control unit is connected with the sending area through the encoding unit.
As a further technical scheme of the invention, the CAN module also comprises a data transmission terminal; the data transmission terminal is a resistor connected in parallel between the output pin and the output pin, and can prevent data from being reflected at the line end and returning in the form of echo, thereby influencing data transmission.
As a further technical scheme of the invention, the bidirectional transmission line is a high-low level twisted pair, so that the influence of external electromagnetic interference on information transmission is prevented.
As a further technical scheme of the invention, the main controller is also provided with an RS-485 communication interface connected with a built-in control unit of the main controller, and the RS-485 communication interface enables the main controller to be connected with a local network and a configuration of a multi-branch communication link to be possible.
Compared with the prior art, the invention has the following advantages and prominent effects:
1. the control unit arranged in the slave controller can read real-time data of the temperature control device in the heating furnace in real time, and the data are transmitted to the master controller through the bidirectional transmission line, so that the heating furnace is monitored in real time without manual intervention, and the working efficiency is improved.
And 2, the data transmission terminal arranged in the CAN module can prevent data from being reflected at the line end and returning in an echo mode, so that the interference on the data transmission is avoided.
Meanwhile, the invention also provides an address automatic matching method for the temperature control system, which comprises the following steps:
s1, when the slave controllers are started, a control unit built in each slave controller can automatically generate a communication address of the slave controller as an identity of each slave controller;
s2, a coding unit arranged in the slave controller converts the generated communication address information into binary data, and the formed binary data is sent to a sending area of a receiving and sending end of the binary data to wait for sending;
s3, judging whether the bidirectional transmission line is in an idle state or not by a sending area of the slave controller;
s4, if the bidirectional transmission line is in an idle state, sending the binary data of the current slave controller to the master controller through the bidirectional transmission line; otherwise, the sending area waits until the bidirectional transmission line is in an idle state, and then sends the binary data of the slave controller to the master controller through the bidirectional transmission line;
s5, after receiving the binary data, a receiving area of a transceiving end of the main controller converts the binary data into normal data, namely a communication address of a slave controller, through a decoding unit arranged in the main controller, and the converted communication address is sent to a control unit arranged in the main controller;
and S6, adding a random but non-repeated numerical value at the tail end of the received communication address by the control unit built in the main controller to form a unique communication address of the slave controller, preventing the communication addresses of the slave controllers from being repeated, and storing the exclusive communication addresses into the control unit built in the main controller to serve as data for identifying each slave controller by the main controller.
As a further technical scheme of the invention, the built-in control unit of the slave controller can monitor the operation state of the heating furnace in real time through the temperature control device, data information of the operation state is sent to the main controller through the bidirectional transmission line, and the main controller sends the operation state of the heating furnace to the PC port through the built-in Ethernet communication module, so that the real-time monitoring of the heating furnace is realized.
As a further technical solution of the present invention, in step S2, the sending area sends a string of random codes to the main controller before sending the communication address, and if the main controller does not receive a response within a first time, it indicates that the two-wire transmission line is in a non-idle state.
As a further technical solution of the present invention, in step S1, the communication address generated by the slave controller includes a physical IP address and a geographical position address of the slave controller.
Compared with the prior art, the invention has the following advantages and prominent effects:
1. by automatically generating the communication address of the slave controller, the number of slave devices in the system can be quickly searched, and the address and the position of the fault machine can be automatically positioned according to the data received by the master controller.
2. The system realizes automatic address matching, avoids manual setting, reduces the error rate and improves the working efficiency.
Drawings
In order to more clearly illustrate the embodiments or technical solutions of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
FIG. 1 is a structural block diagram of a temperature control system according to the present invention.
Fig. 2 is a structural frame diagram of a CAN module according to the present invention.
FIG. 3 is a flow chart of the method for automatically matching the address of the temperature control system according to the present invention.
The reference numbers illustrate: 1. the device comprises a main controller, 2, an Ethernet communication module, 3, a control unit, 4, a CAN module, 5, an RS-485 communication module, 6, a temperature control device, 7, a slave controller, 8, a bidirectional transmission line, 9, a decoding unit, 10, a sending area, 11, an output pin, 12, the decoding unit, 13, a receiving area, 14, an input pin, 15 and a data transmission terminal.
Detailed Description
In order to better understand the technical solution of the present invention, the following embodiments are described in detail with reference to the accompanying drawings.
Referring to the embodiment shown in fig. 1 and 2, a master-slave temperature control system includes a heating furnace and a temperature control system, the heating furnace is provided with a temperature control device 6 for controlling temperature and heating, and the temperature control system includes a master controller 1 and a plurality of slave controllers 7. The main controller 1 and each slave controller 7 are provided with a control unit 3 and CAN modules 4 connected with the control unit 3, adjacent slave controllers 7 are connected through bidirectional transmission lines 8 connected with the CAN modules 4, and the CAN module 4 of the main controller 1 is connected with the CAN module 4 of the first slave controller 7 through the bidirectional transmission lines 8. The bidirectional transmission line 8 is a high-low level twisted pair line, which prevents the influence of external electromagnetic interference on information transmission, adopts a two-line serial communication mode, has strong error detection capability, and can work in a high-noise interference environment.
Referring to the embodiment shown in fig. 1, the master controller 1 is further provided with an ethernet communication module 2 for communicating with an external monitoring terminal, the ethernet communication module 2 is connected to the control unit 3 of the master controller 1, and the control unit 3 of each slave controller 7 is respectively connected to different temperature control devices 6. The CAN communication has the advantages of strong real-time performance, long transmission distance, strong anti-electromagnetic interference capability, low cost and the like, and CAN transmit and receive data in a point-to-point, one-to-many and broadcast centralized mode. The control unit 3 arranged in the slave controller 7 can read real-time data of the temperature control device 6 in the heating furnace in real time, and the data are transmitted to the main controller 1 through the bidirectional transmission line 8, so that real-time monitoring and operation of the heating furnace are realized, manual intervention is not needed, and the working efficiency is improved. The main controller 1 is also provided with an RS-485 communication interface 5 connected with the built-in control unit 3, and the RS-485 communication interface 5 enables the main controller 1 to be connected with a local network and a configuration of a multi-branch communication link.
Referring to the embodiment shown in fig. 2, the CAN module 4 includes an analysis end and a transmission and reception end, the analysis end is composed of a decoding unit 12 and an encoding unit 9, the transmission and reception end is composed of a receiving area 13 and a transmitting area 10, the receiving area 13 is provided with an input pin 14, and the transmitting area 10 is provided with an output pin 11. The control unit 3 is connected to the receiving area 13 via a decoding unit 12 and the control unit 3 is connected to the transmitting area 10 via an encoding unit 9. The CAN module 4 further comprises a data transmission terminal 15, which data transmission terminal 15 is a resistor connected in parallel between the input pin 14 and the output pin 11 and prevents data from being reflected back in the form of echoes at the line end, which affects the transmission of data.
Meanwhile, the invention also provides an address automatic matching method performed by the temperature control system, which comprises the following steps:
s1, when the slave controllers 7 are started, the control unit 3 built in each slave controller 7 automatically generates a communication address of the slave controller 7 as an identity of each slave controller 7, so as to facilitate the identification of the master controller 1.
The built-in control unit 3 of subordinate controller 7 can be through the running state of temperature control device 6 real-time supervision heating furnace, and the data message of these running states sends to main control unit 1 through two-way transmission line 8, and main control unit 1 sends the running state of heating furnace to the PC port through built-in ethernet communication module 2, realizes the real-time supervision to the heating furnace.
In step S1, the communication address generated by the slave controller 7 includes the physical IP address and the geographical position address of the slave controller, so that when a fault occurs, the master controller 1 can be conveniently and accurately located, and the search time is saved.
S2, the coding unit 9 built in the slave controller 7 converts the generated communication address information into binary data, and the formed binary data is sent to the sending area 10 of the sending and receiving end to wait for sending.
And S3, the sending area 10 of the slave controller 7 judges whether the bidirectional transmission line 8 is in an idle state.
In step S2, the transmitting area 10 transmits a random code to the master controller 1 before transmitting the communication address, indicating that the two-wire transmission line 8 is in a non-idle state if the master controller 1 does not respond within a first time.
S4, if the bidirectional transmission line 8 is in an idle state, sending the binary data of the current slave controller 7 to the master controller 1 through the bidirectional transmission line 8; otherwise, the sending area 10 waits until the bidirectional transmission line 8 is in an idle state, and then sends the binary data of the slave controller 7 to the master controller 1 through the bidirectional transmission line 8.
S5, after receiving the binary data, the receiving area 13 of the transmitting and receiving end of the main controller 1 converts the binary data into normal data, namely the communication address of the slave controller 7, through the decoding unit 12 arranged in the main controller 1, and the converted communication address is sent to the control unit 3 arranged in the main controller 1.
And S6, adding a random but non-repeated numerical value at the tail end of the received communication address by the control unit 3 built in the main controller 1 to form a unique communication address of the slave controller 7, preventing the communication address of the slave controller 7 from being repeated, and storing the unique communication addresses into the control unit 3 built in the main controller 1 as data for identifying each slave controller 7 by the main controller 1.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
Claims (4)
1. An address automatic matching method of a master multi-slave temperature control system comprises a heating furnace and the temperature control system, wherein the heating furnace is provided with a temperature control device (6) for regulating and controlling temperature and heating, and the temperature control system comprises a master controller (1) and a plurality of slave controllers (7);
the master controller (1) and each slave controller (7) are provided with a control unit (3) and CAN modules (4) connected with the control units (3), adjacent slave controllers (7) are connected through bidirectional transmission lines (8) connected with the CAN modules (4), and the CAN module (4) of the master controller (1) is connected with the CAN module (4) of the first slave controller (7) through the bidirectional transmission lines (8);
the main controller (1) is also provided with an Ethernet communication module (2) used for communicating with an external monitoring terminal, the Ethernet communication module (2) is connected with a control unit (3) arranged on the main controller (1), and the control unit (3) arranged on each slave controller (7) is respectively connected with different temperature control devices (6);
all the CAN modules (4) comprise analysis ends and transceiving ends, the analysis ends are composed of decoding units (12) and encoding units (9), the transceiving ends are composed of receiving areas (13) and transmitting areas (10), the receiving areas (13) are provided with input pins (14), and the transmitting areas (10) are provided with output pins (11);
the control unit (3) is connected with the receiving area (13) through a decoding unit (12), and the control unit (3) is connected with the sending area (10) through an encoding unit (9);
the CAN module (4) further comprises a data transmission terminal (15); the data transmission terminal (15) is a resistor connected in parallel between the input pin (14) and the output pin (11) and can prevent data from being reflected at the line end and returning in the form of echo, so that the transmission of the data is influenced;
the bidirectional transmission line (8) is a high-low level twisted pair, so that the influence of external electromagnetic interference on information transmission is prevented;
the main controller (1) is also provided with an RS-485 communication interface (5) connected with a built-in control unit (3) of the main controller, and the RS-485 communication interface (5) enables the main controller (1) to be connected with a local network and is provided with a multi-branch communication link;
the method is characterized in that: comprises the following steps:
s1, when the slave controllers (7) are started, a control unit (3) built in each slave controller (7) automatically generates a communication address of the slave controller (7) to serve as an identity of each slave controller (7);
s2, a coding unit (9) built in the slave controller (7) converts the generated communication address information into binary data, and the formed binary data is sent to a sending area (10) of a transmitting and receiving end of the binary data to wait for sending;
s3, judging whether the bidirectional transmission line (8) is in an idle state or not by a sending area (10) of the slave controller (7);
s4, if the bidirectional transmission line (8) is in an idle state, sending the binary data of the current slave controller (7) to the master controller (1) through the bidirectional transmission line (8); otherwise, the sending area (10) waits until the bidirectional transmission line (8) is in an idle state, and then sends the binary data of the slave controller (7) to the master controller (1) through the bidirectional transmission line (8);
s5, after receiving the binary data, a receiving area (13) of a transceiving end of the main controller (1) converts the binary data into normal data, namely a communication address of the slave controller (7), through a decoding unit (12) arranged in the main controller (1), and the converted communication address is sent to a control unit (3) arranged in the main controller (1);
s6, adding a random but non-repeated numerical value to the tail end of the received communication address by the control unit (3) built in the main controller (1) to form unique communication addresses of the slave controllers (7), preventing the communication addresses of the slave controllers (7) from being repeated, and storing the unique communication addresses into the control unit (3) built in the main controller (1) as data for identifying each slave controller (7) by the main controller (1).
2. The method of claim 1, wherein the address of the one-master multi-slave temperature control system is automatically matched with the address of the one-master multi-slave temperature control system, and the method comprises the following steps: the built-in control unit (3) of slave controller (7) can pass through temperature control device (6) real-time supervision heating furnace's running state, and the data message of these running states sends to main controller (1) through two-way transmission line (8), and main controller (1) sends the running state of heating furnace to the PC port through built-in ethernet communication module (2), realizes the real-time supervision to the heating furnace.
3. The method of claim 1, wherein the address of the one-master multi-slave temperature control system is automatically matched with the address of the one-master multi-slave temperature control system, and the method comprises the following steps: in step S2, the sending area (10) sends a string of random codes to the main controller (1) before sending the communication address, and if the main controller (1) does not respond within a first time, it indicates that the bidirectional transmission line (8) is in a non-idle state.
4. The method of claim 1, wherein the address of the one-master multi-slave temperature control system is automatically matched with the address of the one-master multi-slave temperature control system, and the method comprises the following steps: in step S1, the communication address generated by the slave controller (7) includes a slave controller physical IP address and a geographical position address.
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| CN202011040754.1A CN112165422B (en) | 2020-09-28 | 2020-09-28 | Automatic address matching method for one-master multi-slave temperature control system |
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| CN202011040754.1A CN112165422B (en) | 2020-09-28 | 2020-09-28 | Automatic address matching method for one-master multi-slave temperature control system |
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| WO1997046834A1 (en) * | 1996-05-31 | 1997-12-11 | Monitrol Inc. | Fail-safe networked control system for ventilation units |
| CN102156494A (en) * | 2011-01-24 | 2011-08-17 | 句容市博远电子有限公司 | Multi-point temperature control system |
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| CN110325929A (en) * | 2016-12-07 | 2019-10-11 | 阿瑞路资讯安全科技股份有限公司 | System and method for detecting the waveform analysis of cable network variation |
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2020
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|---|---|---|---|---|
| WO1997046834A1 (en) * | 1996-05-31 | 1997-12-11 | Monitrol Inc. | Fail-safe networked control system for ventilation units |
| CN102156494A (en) * | 2011-01-24 | 2011-08-17 | 句容市博远电子有限公司 | Multi-point temperature control system |
| CN204513790U (en) * | 2014-12-24 | 2015-07-29 | 高台县聚合热力有限责任公司 | A kind of boiler heating control system |
| CN110325929A (en) * | 2016-12-07 | 2019-10-11 | 阿瑞路资讯安全科技股份有限公司 | System and method for detecting the waveform analysis of cable network variation |
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