CN111756734A - Internal interconnection communication interface and protocol of frequency converter - Google Patents
Internal interconnection communication interface and protocol of frequency converter Download PDFInfo
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- CN111756734A CN111756734A CN202010585298.2A CN202010585298A CN111756734A CN 111756734 A CN111756734 A CN 111756734A CN 202010585298 A CN202010585298 A CN 202010585298A CN 111756734 A CN111756734 A CN 111756734A
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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
- H04L69/06—Notations for structuring of protocol data, e.g. abstract syntax notation one [ASN.1]
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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
- H04L69/26—Special purpose or proprietary protocols or architectures
Abstract
The invention relates to the technical field of communication programs and discloses an internal interconnection communication interface and protocol of a frequency converter. The internal interconnection communication interface and protocol of the frequency converter realize communication rate self-adaption by automatically scanning baud rate, indirectly define the data package formats of subsequent standard transmission messages and special transmission messages by configuring configuration information in the messages, each module can automatically identify and explain various messages according to the configuration information to realize the complete interconnection and intercommunication of communication of each module, define the standard and special transmission messages, and summarize the information types into real-time information and non-real-time information according to the types and characteristics of information transmitted among the modules, the real-time information types among the modules of the frequency converter are few, but the non-real-time information types are many and complex, thereby obviously improving the compatibility of the communication protocol.
Description
Technical Field
The invention relates to the technical field of communication programs, in particular to an internal interconnection communication interface and protocol of a frequency converter.
Background
The frequency converter comprises a motor control core module, a basic IO function module, an operation panel module, an extended encoder module, an extended communication module and other various extended modules, and the like, wherein the frequency converter is internally provided with the motor control core module, the basic IO function module, the operation panel module, the extended encoder module, the extended communication module and other various extended modules; it is difficult for the client to upgrade or add a new extended function module.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides an internal interconnection communication interface and protocol of a frequency converter, which have the advantages of high working efficiency and convenient use and solve the problems provided by the technical background.
The invention provides the following technical scheme: an internal interconnection communication interface and protocol of a frequency converter comprise a main module A, a module B, a module C and a module D, wherein the main module A comprises a controller, a conversion chip and an interface terminal;
the main module A: the controller is electrically connected with the terminal interface through the UART, and is electrically connected with the conversion chip through the UART, and the conversion chip is electrically connected with the interface terminal through the RS 485;
and a module B: the controller is electrically connected with the interface terminal through the UART, and is electrically connected with the conversion chip through the UART, and the conversion chip is electrically connected with the interface terminal through the RS 485;
and a module C: the controller is electrically connected with the interface terminal through the UART;
a module D: the controller is electrically connected with the conversion chip through the UART, and the conversion chip is electrically connected with the interface terminal through the RS 485;
the main module A is electrically connected with the module B, the module C and the module D respectively.
The main module A and the module B, and the module C and the module D are carefully selected to transmit messages, and the message formats include Head (1byte), Type (1byte), Status (1byte), Data (40byte) and CRC (1 byte).
The selection is carried out, and 3 states of connection state, configuration state and transmission state are included between the main module A and the module B, and between the module C and the module D.
Compared with the prior art, the invention has the following beneficial effects:
1. the internal interconnection communication interface and protocol of the frequency converter realize communication rate self-adaption by automatically scanning baud rate, indirectly define the data package formats of subsequent standard transmission messages and special transmission messages by configuring configuration information in the messages, each module can automatically identify and explain various messages according to the configuration information to realize the complete interconnection and intercommunication of communication of each module, define the standard and special transmission messages, and summarize the information types into real-time information and non-real-time information according to the types and characteristics of information transmitted among the modules, the types of the real-time information among the modules of the frequency converter are few, but the types of the non-real-time information are many and complex, so the real-time information defines the message formats according to the information characteristics; the data message format is greatly simplified through the definition of the virtual parameters, the compatibility of a communication protocol is obviously improved, and the whole system is high in working efficiency and convenient to use.
Drawings
FIG. 1 is a schematic diagram of the electrical connection of a main module A, a module B, a module C and a module D and the electrical connection of the respective modules according to the present invention;
fig. 2 is a schematic diagram of communication between a main module a and a module B according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1-2, an internal interconnection communication interface and protocol for a frequency converter includes a main module a, a module B, a module C, and a module D, where the main module a includes a controller, a conversion chip, and an interface terminal;
the main module A: the controller is electrically connected with the terminal interface through the UART, and is electrically connected with the conversion chip through the UART, and the conversion chip is electrically connected with the interface terminal through the RS 485;
and a module B: the controller is electrically connected with the interface terminal through the UART, and is electrically connected with the conversion chip through the UART, and the conversion chip is electrically connected with the interface terminal through the RS 485;
and a module C: the controller is electrically connected with the interface terminal through the UART;
a module D: the controller is electrically connected with the conversion chip through the UART, and the conversion chip is electrically connected with the interface terminal through the RS 485;
the main module A is electrically connected with the module B, the module C and the module D respectively.
The message format includes Head (1byte), Type (1byte), Status (1byte), Data (40byte), and CRC (1byte), and the basic message format is explained: a Head header byte which is a message header identification code; the Type is a message Type byte, and defines the Type of the message, including common messages such as a connection message, a configuration message and a standard transmission message, and special transmission messages such as a parameter copy message, a program download message, a test message and a fault diagnosis message; status byte, which is a current Status indication message used for reporting the current Status of the module; data is Data transmission bytes, and the Data transmission bytes have different packet formats according to different message types, so that the transmission of corresponding Data is realized; CRC is a check byte and is used for checking whether the message is correct, the connection message is used for handshaking to establish connection when the first communication between the modules or the recovery after the communication is interrupted, the configuration message is used for transmitting the module type, hardware and software configuration information between the modules, after the communication handshaking is successful, the configuration message needs to be transmitted firstly, and after the configuration is successful, the standard or special message transmission can be started, the standard or special message is used for information interactive transmission after the modules enter a normal communication state, and the configuration message can be transmitted and received only after the configuration message is transmitted; the packet format of Data transmission bytes of standard and special transmission messages is automatically adjusted according to configuration messages, the message types are summarized into real-time information and non-real-time information according to the message types and characteristics, the real-time information refers to IO terminal state information and information of various sensors such as an encoder, corresponding information messages are automatically and sequentially packaged according to different configuration messages, the non-real-time information refers to display information, key operation information, standard parameter reading and writing, fault diagnosis information, parameter copying, program downloading and the like, all the information is converted into virtual parameters, then the information is packaged in the message format of the standard parameters, and finally the real-time information and the non-real-time information are uniformly packaged into one message.
The main module A and the module B, and the module C and the module D respectively comprise 3 states of connection state, configuration state and transmission state, the three states are three work flows specifically, the module B, the module C or the module D feed back corresponding messages to the main module A, the configuration state and the connection state both have the work of information receiving and feedback, when a problem occurs, the configuration state and the connection state both feed back the problem to the connection state, and then the work is tried again, and when the messages are correct, signals of the sub-modules can be transmitted to the main module at one time.
The working principle is as follows: taking the main module a and the module B as an example, the main module a and other modules have the same working condition, each module is powered on and initialized, then the module B sends a connection message to the module a, if no feedback timeout is received, the connection message is retransmitted, when the module A feeds back the correct connection message and starts to enter the configuration state, the module B sends the configuration message to the module A, if the feedback is not received and is overtime, the module B retransmits the configuration message, when the continuous 1S does not receive the feedback, the communication fault is reported and the communication is transferred to the connection state, if the module A feeds back the correct configuration message, the configuration message is interpreted and the communication state is transferred to the transmission state, at this time, the module B sends a standard or special transmission box message to the module A in the transmission state, if the module A does not receive the overtime, the retransmission is carried out, and when the continuous 1S does not receive the feedback, reporting the communication fault and transferring to a connection state, if the module A feeds back the correct transmission message, interpreting the transmission message and sending to the next transmission message.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention. In the drawings of the present invention, the filling pattern is only for distinguishing the layers, and is not limited to any other way.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (3)
1. An interconnection communication interface and protocol in a frequency converter comprises a main module A, a module B, a module C and a module D, and is characterized in that: the main module A comprises a controller, a conversion chip and an interface terminal;
the main module A: the controller is electrically connected with the terminal interface through the UART, and is electrically connected with the conversion chip through the UART, and the conversion chip is electrically connected with the interface terminal through the RS 485;
and a module B: the controller is electrically connected with the interface terminal through the UART, and is electrically connected with the conversion chip through the UART, and the conversion chip is electrically connected with the interface terminal through the RS 485;
and a module C: the controller is electrically connected with the interface terminal through the UART;
a module D: the controller is electrically connected with the conversion chip through the UART, and the conversion chip is electrically connected with the interface terminal through the RS 485;
the main module A is electrically connected with the module B, the module C and the module D respectively.
2. The interconnection communication interface and protocol within a frequency converter of claim 1, wherein: the message formats include Head (1byte), Type (1byte), Status (1byte), Data (40byte) and CRC (1 byte).
3. The interconnection communication interface and protocol within a frequency converter of claim 1, wherein: the main module A and the module B, and the module C and the module D respectively comprise 3 states of connection state, configuration state and transmission state.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010585298.2A CN111756734A (en) | 2020-06-24 | 2020-06-24 | Internal interconnection communication interface and protocol of frequency converter |
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| CN202010585298.2A CN111756734A (en) | 2020-06-24 | 2020-06-24 | Internal interconnection communication interface and protocol of frequency converter |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114488903A (en) * | 2022-02-11 | 2022-05-13 | 上海雷诺尔科技股份有限公司 | Communication optical fiber communication composite coding system and method for high-voltage frequency converter unit |
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Application publication date: 20201009 |