CN103338229B - The exchange method of remote terminal unit and data transmission unit and system - Google Patents

The exchange method of remote terminal unit and data transmission unit and system Download PDF

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CN103338229B
CN103338229B CN201310216055.1A CN201310216055A CN103338229B CN 103338229 B CN103338229 B CN 103338229B CN 201310216055 A CN201310216055 A CN 201310216055A CN 103338229 B CN103338229 B CN 103338229B
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instruction
dtu
rtu
data
data content
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CN103338229A (en
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邱小柱
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SHENZHEN HONGDIAN TECHNOLOGIES Corp
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SHENZHEN HONGDIAN TECHNOLOGIES Corp
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Abstract

The present invention is applicable to industrial communication technical field, and provide exchange method and the system of a kind of remote terminal unit RTU and data transmission unit DTU, described method comprises: DTU receives the instruction that RTU issues; DTU resolves this instruction, according to this data content of function code identification in this instruction, and RTU being returned the response message of this instruction, the classification of described instruction comprises: query argument instruction, parameters instruction, preservation parameter instruction, reset instruction, the instruction of upstream data transparent transmission, the instruction of downlink data transparent transmission, query State instruction, GPIO control command, up and down line traffic control instruction and receipt instruction.The technical scheme that the specific embodiment of the invention provides has easy to maintenance, the advantage that cost is low.

Description

The exchange method of remote terminal unit and data transmission unit and system
Technical field
The invention belongs to industrial communication field, particularly relate to exchange method and the system of a kind of remote terminal unit and data transmission unit.
Background technology
Traditional data transmission set, the interface being supplied to data acquisition equipment is inquired about and parameters and resetting system exactly, at present, each produces the producer of remote terminal unit, generally there is respective standard main product, this main product, general is all simply be responsible for data-transformation facility, certain industry is used in once needs, the business for the sector is needed again to use details function and the flow process of scene repositionings, such as status poll function, thus need the software code of reconstituted product, namely Original Design Manufacturer (the OriginalDesignManufacturer usually said, ODM).And radio data-transmission equipment has extensive application at industry-by-industry at present, if things continue this way, and radio data-transmission equipment manufacturer drops into fixing maintenance by needing and developer processes such product customization, and cost is high.
Summary of the invention
The object of the embodiment of the present invention is the exchange method providing a kind of remote terminal unit and data transmission unit, and the cost being intended to solve prior art is high, problem difficult in maintenance.
The embodiment of the present invention is achieved in that the exchange method of a kind of remote terminal unit RTU and data transmission unit DTU, and described method comprises:
DTU receives the instruction that RTU issues; Described instruction comprises: frame head, function code, frame length, School Affairs, data content and postamble; Described function code is for representing the classification of this instruction; Described data content is for carrying the data of this instruction;
DTU resolves this instruction, and according to this data content of function code identification in this instruction, and RTU is returned the response message of this instruction, described response message comprises: frame head, function code, frame length, School Affairs, data content and postamble; The function code of described response message is corresponding with the function code of described instruction, and the data content of described response message is corresponding with the data content of described instruction;
The classification of described instruction comprises: query argument instruction, parameters instruction, preservation parameter instruction, reset instruction, the instruction of upstream data transparent transmission, the instruction of downlink data transparent transmission, query State instruction, GPIO control command, up and down line traffic control instruction and receipt instruction.
Optionally, when the classification of described instruction is query argument instruction, described DTU resolves this instruction, and according to this data content of function code identification in this instruction, and response message RTU being returned this instruction comprises:
DTU resolves described query argument instruction;
If described query argument instruction errors, the string data that described in DTU, query argument instruction is corresponding is sent to DSC as business datum;
If the data content of described query argument instruction is empty, or the ID of data content in query argument instruction is not all in the parameter list pre-set, and DTU returns the response message of query argument instruction, and the data content of described response message be sky;
If have multiple No. ID in described query argument instruction, have No. ID, part not in the parameter list pre-set in described multiple No. ID, then DTU skips No. ID, described part, processes other No. ID except No. ID, described part in multiple No. ID.
Optionally, when the classification of described instruction is for preserving parameter instruction, described method, after the instruction that DTU reception RTU issues, also comprises:
RTU, after the described preservation parameter instruction of transmission, after receiving the response message of the described preservation parameter instruction that described DTU returns, sends instructions under continuation.
On the other hand, provide the interactive system of a kind of remote terminal unit RTU and data transmission unit DTU, described system comprises: DTU and RTU;
Described DTU, for receiving the instruction that RTU issues; Described instruction comprises: frame head, function code, frame length, School Affairs, data content and postamble; Described function code is for representing the classification of this instruction; Described data content is for carrying the data of this instruction;
Described DTU, for resolving this instruction, according to this data content of function code identification in this instruction, and RTU is returned the response message of this instruction, described response message comprises: frame head, function code, frame length, School Affairs, data content and postamble; The function code of described response message is corresponding with the function code of described instruction, and the data content of described response message is corresponding with the data content of described instruction;
The classification of described instruction comprises: query argument instruction, parameters instruction, preservation parameter instruction, reset instruction, the instruction of upstream data transparent transmission, the instruction of downlink data transparent transmission, query State instruction, GPIO control command, up and down line traffic control instruction and receipt instruction.
Optionally, when described instruction is query argument instruction, described DTU is specifically for resolving described query argument instruction;
If described query argument instruction errors, the string data that described in DTU, query argument instruction is corresponding is sent to DSC as business datum;
If the data content of described query argument instruction is empty, or the ID of data content in query argument instruction is not all in the parameter list pre-set, and DTU returns the response message of query argument instruction, and the data content of described response message be sky;
If have multiple No. ID in described query argument instruction, have No. ID, part not in the parameter list pre-set in described multiple No. ID, then DTU skips No. ID, described part, processes other No. ID except No. ID, described part in multiple No. ID.
Optionally, when the classification of described instruction is for preserving parameter instruction, described RTU, for after the described preservation parameter instruction of transmission, after receiving the response message of the described preservation parameter instruction that described DTU returns, sends instructions under continuation.
Compared with prior art, beneficial effect is the embodiment of the present invention: technical scheme of the present invention to have cost low, advantage easy to maintenance.
Accompanying drawing explanation
Fig. 1 is the flow chart of the exchange method of a kind of remote terminal unit of providing of the embodiment of the present invention and data transmission unit.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
The specific embodiment of the invention provides the exchange method of a kind of remote terminal unit (RTU) with data transmission unit (DTU), and the method as shown in Figure 1, comprising:
101, DTU receives the instruction that RTU issues; Described instruction comprises: frame head, function code, frame length, School Affairs, data content and postamble; Above-mentioned functions code is for representing the classification of this instruction; Above-mentioned data content is for carrying the data of this instruction;
102, DTU resolves this instruction, and according to this data content of function code identification in this instruction, and RTU is returned the response message of this instruction, this response message comprises: frame head, function code, frame length, School Affairs, data content and postamble; The function code of above-mentioned response message is corresponding with the function code of this instruction, and the data content of above-mentioned response message is corresponding with the data content of this instruction.
The classification of above-mentioned instruction comprises: query argument instruction, parameters instruction, preservation parameter instruction, reset instruction, the instruction of upstream data transparent transmission, the instruction of downlink data transparent transmission, query State instruction, GPIO control command, up and down line traffic control instruction and receipt instruction.
Technical scheme provided by the invention provides exchange method to contain most instruction, such client can select whether select above-mentioned instruction in actual applications according to the actual needs, if client does not need to select above-mentioned instruction, then above-mentioned instruction does not send, if the above-mentioned instruction of customer selecting, then send above-mentioned instruction, because technical scheme provided by the invention contains most of instruction, so client can directly select according to actual needs, also without the need to equipment being returned the amendment that genuine carries out code, so it has the advantage reduced costs.
The concrete representation of above-mentioned instruction is as follows:
Query argument instruction:
Slave computer sends parameter query instruction, RTU → DTU:
Data content: the ID group query argument, such as: ID1, ID2, ID3....
The corresponding unique parameters title of ID:2Bytes (high byte, front, holds form greatly), each parameter ID, the high byte of parameter ID represents large class parameter type belonging to this parameter, and low byte represents the sequence number of this parameter in this large class parameter.
DTU returns query argument instruction response message, DTU → RTU:
Data content:
Each parameter all adopts TLV form, i.e. parameter ID+ parameter length+parameter value;
Form:
[parameter ID1+ parameter length+parameter value] [parameter ID2+ parameter length+parameter value] [parameter ID3+ parameter length+parameter value]
The corresponding unique parameters title of parameter ID:2Bytes (high byte, front, holds form greatly), each parameter ID, the high byte of parameter ID represents large class parameter type belonging to this parameter, and low byte represents the sequence number of this parameter in this large class parameter.
Parameter length: 2Bytes (high byte, front, holds form greatly), represents subsequent parameter value length.
Parameter value: NBytes, represents the content of this parameter.
Illustrate:
The form of the corresponding ID of concrete parameter and parameter value is common technology, at present because the length of data content fields is restricted to 1056, if so find to respond data content length=1056 of parameter, then when issuing query statement, preferably disposablely do not inquire about multi-parameter, namely reduce the number of the ID group in query statement
If the query argument instruction errors that RTU sends (head, tail, function code, length, verification), namely not in full conformity with the form that agreement specifies, this string data will be sent to data service center (dataservicecenter, DSC) by as business datum
The query statement content that RTU sends is empty, or ID is all wrong, and the response content that DTU returns also is empty.
Have multiple No. ID in the query statement that RTU sends, if there is No. ID, parameter to be wrong (not being all No. ID of mistake inside parameter list), DTU can skip this No. ID, processes next No. ID.
Parameters instruction
Slave computer → DTU
Data content: with the response packet form in query argument, each parameter all adopts TLV form.
DTU receives successfully and returns parameters instruction response message, DTU → slave computer
State:
0x00 arranges successfully-represents all parameters and arranges successfully
0x01 setup failed-expression has an optimum configurations failure at least
Illustrate:
Inside a configuration-direct, be provided with multiple parameter, only have and want an optimum configurations failure, state is just 0x01, and data content is the TLV value of failed parameter, and all parameters are all arranged successfully, and state is just 0x00, and the data content of response message is empty simultaneously
After parameters, need RTU to send and preserve parameter instruction to preserve parameter, DTU initiatively can not preserve the parameter after arranging.
Preserve parameter instruction
Slave computer sends preserves parameter instruction, slave computer → DTU
DTU receives successfully and returns preservation parameter instruction response message, DTU → slave computer
State:
0x00 preserves parameter success
0x01 preserves parameter failure
Remarks:
DTU preserves parameter needs about 10S, and DTU will just give RTU response packet after parameter is preserved, and suggestion RTU, after this preservation parameter instruction of transmission, waits for and does other operations again after DTU gives response.
Reset instruction
Slave computer sends reset instruction, slave computer → DTU
DTU receives successfully and returns reset instruction response message, represents and receives slave computer instruction, prepares to reset, DTU → slave computer
Protocol data (GPRS) transparent transmission
Upstream data transparent transmission instruction (RTU → DTU):
Slave computer sends the instruction of upstream data transparent transmission to dedicated tunnel, and DTU receives nonreply after this instruction, directly the data content of upstream data transparent transmission instruction is passed through dedicated tunnel;
Format description:
Channel number: 1 byte, value 0 ~ 4,0 expression is sent to all passages, represents and be only sent to special modality when being greater than 0;
Data content: maximum 1024 bytes is business datum content.
Remarks:
If slave computer sends data and do not meet above-mentioned form, then pass through all passages as business datum;
Downlink data transparent transmission instruction (DTU → RTU):
When enabling " the GPRS descending protocol of RTU-DTU " after, DTU passes through RTU, if do not opened after the DSC data encapsulation received is become following form " the GPRS descending protocol of RTU-DTU ", then direct by the data penetration transmission of DSC to RTU.
Format description:
Channel number: 1 byte, value 1 ~ 4, represents Data Source passage
Data content: maximum 1024 bytes is business datum content
Remarks:
When not enabling " the GPRS descending protocol of RTU-DTU " time, DTU does not carry out any encapsulation to the GPRS data received.
If the data receiving DSC are divided into multiple bag to send to RTU more than 1024, DTU;
Agreement note (SMS) transparent transmission
Upstream data transparent transmission instruction (RTU → DTU):
Format description:
Destination number: 32 bytes, recognition purpose phone number, if do not have 32 bytes, must mend 0x00
Data content: maximum 1024 bytes is the note data content that will send
Downlink data transparent transmission instruction (DTU → RTU):
When enabling " the SMS descending protocol of RTU-DTU " after, the note that receives by the encapsulation of following form, then is transmitted to RTU by DTU.
Format description:
Source numbers: 32 bytes, mark note source numbers, less than 32 bytes, DTU can mend 0x00 process;
Data content: maximum 1024 bytes is the note data content received
Remarks:
When not enabling " the SMS descending protocol of RTU-DTU " time, DTU does not carry out any encapsulation by the note received, and directly passes through RTU.
Inquiry DTU status command
RTU sends status poll instruction, RTU → DTU
DTU return state query statement response message: DTU → RTU
Data content:
Each parameter all adopts TLV form:
Type(2Bytes)+Length(2Bytes)+Value(NBytes)
Type:
State ID number, high byte represents the large class of state, and low byte represents the sequence number in large class parameter.
Length:
Represent the length (in units of byte) of Value, high byte is front.
Value:
NBytes, state content
Multiple TLV can be had in data content to wrap, but length can not more than 1024B.
The state ID of current support mainly comprises following content:
State parameter table
GPIO control command
RTU→DTU:
Format description:
GPIO data format=GPIO mark+length mark+level mark+level time+level mark+level time
GPIO identifies (1 byte):
0~31←→P0.0~P0.31
32~63←→P1.0~P1.31
64~95←→P2.0~P2.31
96~127←→P3.0~P3.31
Length mark (2 byte):
Represent the data length that this GPIO is follow-up
GPIO level (1 byte):
0x00 low level output
0x01 high level output
Level time (2 byte):
High byte front, unit 100ms
GPIO data, by the packing of above form, once can arrange multiple I/O port, can have multiple level state in an I/O port
DTU receives successfully and returns response message, DTU → RTU:
Status indicator:
0x00 represents that the GPIO data received are correct.
0x01 represents the GPIO data received wrong (all wrong or part is wrong).
Data content:
If status indicator is 0x00, this is countless certificate (0 byte), if status indicator is 0x01, this content is the GPIO data of mistake.
Upper and lower line traffic control instruction
When only having the mode of reaching the standard grade as DTU be configured to " RTU controls to reach the standard grade " and open " RTU-DTU communication protocol " function, this control command just can come into force, otherwise this control command will not produce any control effects.
Other two kinds of modes of reaching the standard grade of DTU are respectively triggering and reach the standard grade and online two kinds of modes always, do simple declaration below for three kinds of application modes:
If RTU producer wishes the rear automatic wire charging of DTU start, and keep online always, then the mode of reaching the standard grade of DTU is configured to AUTO and gets final product (factory-default)
If RTU producer wishes that DTU just reaches the standard grade when there being transfer of data, automatically roll off the production line without during transfer of data, the mode of reaching the standard grade then by configuration DTU is WAKE, adjusted by idle downtime as required can (Default Idle downtime be 0 simultaneously, namely automatically do not roll off the production line after reaching the standard grade, if be configured to 60, represent 60 seconds without business data transmission, DTU rolls off the production line automatically)
If RTU wishes whether control DTU reaches the standard grade, then the mode of reaching the standard grade of DTU is configured to CTRL, and needs to open this RTU-DTU communication protocol.
Once after so configuring DTU, original flow process that DTU rolls off the production line incites somebody to action not revival, transfers to RTU producer to come net control rolls off the production line completely, and if not the producer familiar to network control, suggestion is not configured to this pattern, otherwise will run counter to desire.
RTU sends the upper and lower line of control PPP, RTU → DTU
Type:
0x05---network control
Only support 0x05 type at present herein, other values will expand use after doing
On to roll off the production line mark:
1---reach the standard grade
0---roll off the production line
DTU response message, DTU → RTU:
Status indicator:
0---instruction is correct, and PPP prepares to reach the standard grade or roll off the production line
1---instruction errors, type error or on to roll off the production line mark mistake
Interim unlatching RTU-DTU agreement
RTU-DTU agreement, do not support in the default configuration of DTU, if RTU needs this agreement of Interim use, then can open RTU-DTU agreement by this special string below temporarily, not revival is incited somebody to action after restarting, if need DTU to support this agreement always, then configure this parameter by configuration tool, make it open.
This instruction bag is totally 21 bytes, and content is as follows:
If DTU receives a bag the inside can only these character strings, if there are these character strings a bag the inside, but also having other data (as also having other before 11 or after 17), RTU-DTU agreement will not be opened.
Receipt instruction
If open this RTU-DTU communication protocol,
DTU, when short message sending is successful or failed, initiatively will return to slave computer result
DTU, after dial-up success or failure or when rolling off the production line, when namely network changes, initiatively exports the network-like state value of DTU
Concrete output format is shown in following explanation, state value herein, when status poll bag occurs RTU, also will be present in response packet.
DTU→RTU
Data content:
Each parameter all adopts TLV form:
Type(2Bytes)+Length(2Bytes)+Value(NBytes)
Type:
2 bytes, high byte is front
0XF011 represents short message sending status
0xF003 represents network state
Length:
2 bytes, high byte, front, is 0x0001 herein
Value:
1 byte
When type is note,
0x00-short message sending success 0x01-short message sending failure
When type is network state,
0x00-online 0x01-not online
The specific embodiment of the invention also provides the interactive system of a kind of remote terminal unit RTU and data transmission unit DTU, and described system comprises: DTU and RTU;
Described DTU, for receiving the instruction that RTU issues; Described instruction comprises: frame head, function code, frame length, School Affairs, data content and postamble; Described function code is for representing the classification of this instruction; Described data content is for carrying the data of this instruction;
Described DTU, for resolving this instruction, according to this data content of function code identification in this instruction, and RTU is returned the response message of this instruction, described response message comprises: frame head, function code, frame length, School Affairs, data content and postamble; The function code of described response message is corresponding with the function code of described instruction, and the data content of described response message is corresponding with the data content of described instruction;
The classification of described instruction comprises: query argument instruction, parameters instruction, preservation parameter instruction, reset instruction, the instruction of upstream data transparent transmission, the instruction of downlink data transparent transmission, query State instruction, GPIO control command, up and down line traffic control instruction and receipt instruction.
Optionally, when described instruction is query argument instruction, described DTU is specifically for resolving described query argument instruction;
If described query argument instruction errors, the string data that described in DTU, query argument instruction is corresponding is sent to DSC as business datum;
If the data content of described query argument instruction is empty, or the ID of data content in query argument instruction is not all in the parameter list pre-set, and DTU returns the response message of query argument instruction, and the data content of described response message be sky;
If have multiple No. ID in described query argument instruction, have No. ID, part not in the parameter list pre-set in described multiple No. ID, then DTU skips No. ID, described part, processes other No. ID except No. ID, described part in multiple No. ID.
Optionally, when the classification of described instruction is for preserving parameter instruction, described RTU, for after the described preservation parameter instruction of transmission, after receiving the response message of the described preservation parameter instruction that described DTU returns, sends instructions under continuation.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments done within the spirit and principles in the present invention, equivalent replacement and improvement etc., all should be included within protection scope of the present invention.

Claims (4)

1. an exchange method of remote terminal unit RTU and data transmission unit DTU, is characterized in that, described method comprises:
DTU receives the instruction that RTU issues; Described instruction comprises: frame head, function code, frame length, School Affairs, data content and postamble; Described function code is for representing the classification of this instruction; Described data content is for carrying the data of this instruction;
DTU resolves this instruction, and according to this data content of function code identification in this instruction, and return the response message of this instruction to RTU, described response message comprises: frame head, function code, frame length, School Affairs, data content and postamble; The function code of described response message is corresponding with the function code of described instruction, and the data content of described response message is corresponding with the data content of described instruction;
The classification of described instruction comprises: query argument instruction, parameters instruction, preservation parameter instruction, reset instruction, the instruction of upstream data transparent transmission, the instruction of downlink data transparent transmission, query State instruction, GPIO control command, up and down line traffic control instruction and receipt instruction;
When the classification of described instruction is query argument instruction, described DTU resolves this instruction, according to this data content of function code identification in this instruction, and comprises to the response message that RTU returns this instruction:
DTU resolves described query argument instruction;
If described query argument instruction errors, string data corresponding for described query argument instruction is sent to data service center DSC as business datum by DTU;
If the data content of described query argument instruction is empty, or the ID of data content in query argument instruction is not all in the parameter list pre-set, and DTU returns the response message of query argument instruction, and the data content of described response message be sky;
If have multiple No. ID in described query argument instruction, have No. ID, part not in the parameter list pre-set in described multiple No. ID, then DTU skips No. ID, described part, processes other No. ID except No. ID, described part in multiple No. ID.
2. method according to claim 1, is characterized in that, when the classification of described instruction is for preserving parameter instruction, described method, after the instruction that DTU reception RTU issues, also comprises:
RTU, after the described preservation parameter instruction of transmission, after receiving the response message of the described preservation parameter instruction that described DTU returns, sends instructions under continuation.
3. an interactive system of remote terminal unit RTU and data transmission unit DTU, is characterized in that, described system comprises: DTU and RTU;
Described DTU, for receiving the instruction that RTU issues; Described instruction comprises: frame head, function code, frame length, School Affairs, data content and postamble; Described function code is for representing the classification of this instruction; Described data content is for carrying the data of this instruction;
Described DTU, for resolving this instruction, according to this data content of function code identification in this instruction, and return the response message of this instruction to RTU, described response message comprises: frame head, function code, frame length, School Affairs, data content and postamble; The function code of described response message is corresponding with the function code of described instruction, and the data content of described response message is corresponding with the data content of described instruction;
The classification of described instruction comprises: query argument instruction, parameters instruction, preservation parameter instruction, reset instruction, the instruction of upstream data transparent transmission, the instruction of downlink data transparent transmission, query State instruction, GPIO control command, up and down line traffic control instruction and receipt instruction;
When described instruction is query argument instruction, described DTU is specifically for resolving described query argument instruction;
If described query argument instruction errors, string data corresponding for described query argument instruction is sent to DSC as business datum by DTU;
If the data content of described query argument instruction is empty, or the ID of data content in query argument instruction is not all in the parameter list pre-set, and DTU returns the response message of query argument instruction, and the data content of described response message be sky;
If have multiple No. ID in described query argument instruction, have No. ID, part not in the parameter list pre-set in described multiple No. ID, then DTU skips No. ID, described part, processes other No. ID except No. ID, described part in multiple No. ID.
4. system according to claim 3, is characterized in that, when the classification of described instruction is for preserving parameter instruction, described RTU, for after the described preservation parameter instruction of transmission, after receiving the response message of the described preservation parameter instruction that described DTU returns, send instructions under continuation.
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