CN112165422A - One-master multi-slave temperature control system and address automatic matching method - Google Patents
One-master multi-slave temperature control system and address automatic matching method Download PDFInfo
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- CN112165422A CN112165422A CN202011040754.1A CN202011040754A CN112165422A CN 112165422 A CN112165422 A CN 112165422A CN 202011040754 A CN202011040754 A CN 202011040754A CN 112165422 A CN112165422 A CN 112165422A
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- controller
- slave
- temperature control
- control system
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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 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, 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 a one-master multi-slave temperature control system and an address automatic matching method.
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 manual recording mode is far from the requirement, 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 need manual operation, the operation is complicated, the operation time of an operator is long, and the manual operation has the hidden trouble of wrong dial or wrong setting.
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 CAN modules connected with the control units, adjacent slave controllers are connected through bidirectional transmission lines 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 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.
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.
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 a wire end and returning in an echo mode, so that interference on data transmission is avoided.
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 are started, the built-in control unit of each slave controller automatically generates a communication address of the slave controller as the identity of each slave controller;
s2, the coding unit built in the slave controller converts the generated communication address information into binary data, and the formed binary data is sent to the sending area of the receiving and sending end to wait for sending;
s3, judging whether the bidirectional transmission line is in an idle state or not by the sending area of the slave controller;
s4, if the bidirectional transmission line is in an idle state, the binary data of the current slave controller is sent 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, the receiving area of the main controller receiving and transmitting end converts the binary data into normal data, namely the communication address of the slave controller, through the decoding unit in the main controller, and the converted communication address is sent to the control unit in the main controller;
and S6, adding a random but non-repeated value at the tail end of the received communication address by the control unit built in the master 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 master controller as data for identifying each slave controller by the master 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 transmitting area transmits a random code to the main controller before transmitting the communication address, and if the main controller does not respond 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 7, 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, the data transmission terminal 15 being a resistor connected in parallel between the output pin 14 and the output pin 11, which prevents data from being reflected back in the form of echoes at the line end, thereby affecting 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:
when the slave controllers 7 are activated S1, 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 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.
In step S1, the communication address generated by the slave controller 7 includes the physical IP address and the geographical address of the slave controller, so that the master controller 1 can accurately locate when a fault occurs, 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 transmission area 10 of the transmitting/receiving end to wait for transmission.
S3, the transmission area 10 of the slave controller 7 judges whether or not 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, and if the master controller 1 does not respond within a first time, it indicates that the two-wire transmission line 8 is in a non-idle state.
S4, if the bidirectional transmission line 8 is in an idle state, the binary data of the current slave controller 7 is sent to the master controller 1 through the bidirectional transmission line 8; on the contrary, the sending area 101 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 at the transceiving end of the master controller 1 converts the binary data into normal data, i.e. the communication address of the slave controller 7, by the decoding unit 12 built in the master controller 1, and sends the converted communication address to the control unit 3 built in the master controller 1.
S6, the control unit 3 in the master controller 1 adds a random but non-repeating value to the end of the received communication address to form a unique communication address for the slave controller 7, thereby preventing the communication addresses of the slave controllers 7 from being repeated, and these unique communication addresses are stored in the control unit 3 in the master controller 1 as data for the master controller 1 to identify each slave controller 7.
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 (9)
1. The utility model provides a main temperature control system that follows more, includes heating furnace and temperature control system, the heating furnace is equipped with temperature control device (6) that are used for regulating and control the temperature and heat, its characterized in that: 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 further 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).
2. A one-master-multiple-slave temperature control system according to claim 1, characterized in that all of the CAN modules (4) comprise a parsing end and a transmitting and receiving end, the parsing end is composed of a decoding unit (12) and an encoding unit (9), the transmitting and receiving 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 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).
3. A master-slave temperature control system according to claim 1 or 2, characterized in that the CAN module (4) further comprises a data transmission terminal (15); the data transmission terminal (15) is a resistor connected in parallel between the output pin (11) and can prevent data from being reflected at the end of the line and returning in the form of echo, thereby influencing data transmission.
4. A master-slave temperature control system according to claim 1, wherein the bidirectional transmission line (8) is a high-low twisted pair line, so as to prevent external electromagnetic interference from affecting information transmission.
5. A master-slave temperature control system according to claim 1, characterized in that the master controller (1) is further provided with an RS-485 communication interface (5) connected to its built-in control unit (3), said RS-485 communication interface (5) enabling the configuration of the master controller (1) to connect to local networks and multi-branch communication links.
6. An address automatic matching method using a master-slave temperature control system according to any one of claims 1 to 5, comprising the steps of:
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 () to be used as the identity of each slave controller (7);
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 receiving and sending end to wait for sending;
s3, judging whether the bidirectional transmission line (8) is in an idle state or not by the 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); on the contrary, 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 receiving and transmitting end of the main controller (1) converts the binary data into normal data through the decoding unit (12) arranged in the main controller (1), namely the communication address of the slave controller (7), and the converted communication address is sent to the control unit (3) arranged in the main controller (1);
s6, adding a random but non-repeated value at the 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) and prevent the communication address of the slave controller (7) from being repeated, wherein the unique communication addresses are stored in the control unit (3) built in the main controller (1) and are used as data for identifying each slave controller (7) by the main controller (1).
7. The method for automatically matching addresses using a temperature control system of claim 6, wherein: 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.
8. The method for automatically matching addresses using a temperature control system of claim 6, wherein: 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.
9. The method for automatically matching addresses using a temperature control system of claim 6, wherein: 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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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TWI816570B (en) * | 2022-10-04 | 2023-09-21 | 新唐科技股份有限公司 | Method and system for automatically setting addresses |
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