CN103338229A - Method and system for interaction between remote terminal device and data transmission unit - Google Patents

Method and system for interaction between remote terminal device and data transmission unit Download PDF

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Publication number
CN103338229A
CN103338229A CN2013102160551A CN201310216055A CN103338229A CN 103338229 A CN103338229 A CN 103338229A CN 2013102160551 A CN2013102160551 A CN 2013102160551A CN 201310216055 A CN201310216055 A CN 201310216055A CN 103338229 A CN103338229 A CN 103338229A
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instruction
dtu
data
rtu
data content
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CN103338229B (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 invention is applicable to the industrial communication technology field and provides a method and a system for interaction between a remote terminal device and a data transmission unit. The method comprises steps that: instructions issued by an RTU are received by a DTU; the instructions are parsed by the DTU, data contents are identified according to function codes in the instructions, response messages of the instructions are returned by the RTU, types of the instructions comprise a parameter query instruction, a parameter setting instruction, a parameter storing instruction, a reset instruction, an uplink data transparent transmission instruction, a downlink data transparent transmission instruction, a query state instruction, a GPIO control instruction, an upper and lower line control instruction and a receipt instruction. The method and the system have advantages of convenient maintenance and low cost.

Description

The exchange method of remote terminal unit and data transmission unit and system
Technical field
The invention belongs to the industrial communication field, relate in particular to exchange method and the system of a kind of remote terminal unit and data transmission unit.
Background technology
Traditional data transmission set, parameter and resetting system are inquired about and arranged to the interface that offers data acquisition equipment exactly, at present, each produces the producer of remote terminal unit, the general standard main product that has separately, this main product, generally all be simply to be responsible for data-transformation facility, in case need to use when certain industry, need use details function and the flow process of scene repositionings at the business of the sector again, for example status poll function, thus need the software code of reconstruct product, namely the Original Design Manufacturer of usually saying (Original Design Manufacturer, ODM).And radio data-transmission equipment has extensive application at industry-by-industry at present, and if things continue this way, and radio data-transmission equipment manufacturer will need to drop into fixing maintenance and the developer handles such product customization, the cost height.
Summary of the invention
The purpose of the embodiment of the invention is to provide the exchange method of a kind of remote terminal unit and data transmission unit, is intended to solve the cost height of prior art, problem difficult in maintenance.
The embodiment of the 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, verification and, data content and postamble; Described function code is used for the classification of this instruction of expression; Described data content is used for carrying the data of this instruction;
DTU resolves this instruction, identifies this data content according to the function code in this instruction, and RTU is returned the response message of this instruction, and described response message comprises: frame head, function code, frame length, verification and, 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 instructs, arranges parameter 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, line traffic control instruction and receipt instruction up and down.
Optionally, when the classification of described instruction was the query argument instruction, described DTU resolved this instruction, identified this data content according to the function code that this instruction is interior, and the response message that RTU returns this instruction is comprised:
DTU resolves described query argument instruction;
If described query argument instruction errors, the corresponding string data of the described query argument instruction of DTU sends to DSC as business datum;
If the data content of described query argument instruction is empty, or the ID of the data content in the query argument instruction is whole not in the parameter list that sets in advance, and DTU returns the response message of query argument instruction, and the data content of described response message is empty;
If have a plurality of ID numbers in the instruction of described query argument, there be part ID number not in the parameter list that sets in advance in described a plurality of ID numbers, then DTU skips described part ID number, handles in a plurality of ID numbers other ID numbers except described part ID number.
Optionally, when the classification of described instruction was the preservation parameter instruction, described method also comprised after the instruction that DTU reception RTU issues:
RTU after sending described preservation parameter instruction, receive the response message of the described preservation parameter instruction that described DTU returns after, send instructions under continuing.
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 is used for receiving the instruction that RTU issues; Described instruction comprises: frame head, function code, frame length, verification and, data content and postamble; Described function code is used for the classification of this instruction of expression; Described data content is used for carrying the data of this instruction;
Described DTU be used for to resolve this instruction, identifies this data content according to the function code that this instruction is interior, and RTU is returned the response message of this instruction, and described response message comprises: frame head, function code, frame length, verification and, 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 instructs, arranges parameter 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, line traffic control instruction and receipt instruction up and down.
Optionally, when described instruction was the query argument instruction, described DTU specifically was used for resolving described query argument instruction;
If described query argument instruction errors, the corresponding string data of the described query argument instruction of DTU sends to DSC as business datum;
If the data content of described query argument instruction is empty, or the ID of the data content in the query argument instruction is whole not in the parameter list that sets in advance, and DTU returns the response message of query argument instruction, and the data content of described response message is empty;
If have a plurality of ID numbers in the instruction of described query argument, there be part ID number not in the parameter list that sets in advance in described a plurality of ID numbers, then DTU skips described part ID number, handles in a plurality of ID numbers other ID numbers except described part ID number.
Optionally, when the classification of described instruction when preserving parameter instruction, described RTU is used for after sending described preservation parameter instruction, receive the response message of the described preservation parameter instruction that described DTU returns after, send instructions under continuing.
The embodiment of the invention compared with prior art, beneficial effect is: technical scheme of the present invention have low, an easy to maintenance advantage of cost.
Description of drawings
Fig. 1 is the flow chart of the exchange method of a kind of remote terminal unit of providing of the embodiment of the invention and data transmission unit.
Embodiment
In order to make purpose of the present invention, technical scheme and advantage clearer, 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 explaining the present invention, and be not used in restriction 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 this method comprises as shown in Figure 1:
101, DTU receives the instruction that RTU issues; Described instruction comprises: frame head, function code, frame length, verification and, data content and postamble; The above-mentioned functions sign indicating number is used for the classification of this instruction of expression; Above-mentioned data content is used for carrying the data of this instruction;
102, DTU resolves this instruction, identifies this data content according to the function code in this instruction, and RTU is returned the response message of this instruction, and this response message comprises: frame head, function code, frame length, verification and, 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 instructs, arranges parameter 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, line traffic control instruction and receipt instruction up and down.
Technical scheme provided by the invention provides exchange method to comprise most instruction, the client can select whether to select for use above-mentioned instruction in actual applications according to the actual needs like this, if the client does not need to select for use above-mentioned instruction, then above-mentioned instruction does not send, if customer selecting above-mentioned instruction, then send above-mentioned instruction, because technical scheme provided by the invention has comprised most of instruction, so the client can directly select according to actual needs, also need not equipment is returned the modification that former factory carries out code, so it has the advantage that reduces cost.
The concrete representation of above-mentioned instruction is as follows:
The query argument instruction:
Slave computer sends the parameter query instruction, RTU → DTU:
Data content: the ID group of query argument, such as: ID1, ID2, ID3....
ID:2Bytes (high byte is held form greatly preceding), the corresponding unique parameter name of each parameter I D, the high byte of parameter I D are represented the affiliated big class parameter type of this parameter, low byte represents the sequence number of this parameter in this big class parameter.
DTU returns query argument commanded response message, DTU → RTU:
Data content:
Each parameter all adopts the TLV form, i.e. parameter I D+ parameter length+parameter value;
Form:
[parameter I D1+ parameter length+parameter value] [parameter I D2+ parameter length+parameter value] [parameter I D3+ parameter length+parameter value]
Parameter I D:2Bytes (high byte is held form greatly preceding), the corresponding unique parameter name of each parameter I D, the high byte of parameter I D are represented the affiliated big class parameter type of this parameter, low byte represents the sequence number of this parameter in this big class parameter.
Parameter length: 2Bytes (high byte is held form greatly preceding), expression 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 restriction of data content field is 1056, if so find to have responded data content length=1056 of parameter, then when issuing query statement, preferably the disposable multi-parameter of not inquiring about namely reduces the number that the ID in the query statement organizes
If the query argument instruction errors (head, tail, function code, length, verification) that RTU sends, namely not in full conformity with the form of agreement regulation, this string data will be sent to as business datum data service center (data service center, DSC)
The query statement content that RTU sends is empty, or ID all is wrong, and the response content that DTU returns also is empty.
Having a plurality of ID numbers in the query statement that RTU sends, is wrong (all not being wrong ID number in parameter list the inside) if there be parameter I D number, and DTU can skip this ID number, handles next ID number.
Parameter instruction is set
Slave computer → DTU
Data content: with the response packet form in the query argument, each parameter all adopts the TLV form.
Return after DTU receives successfully parameter instruction response message, DTU → slave computer are set
State:
0x00 arranges all parameters of success-expression success is set
0x01 arranges failure-expression and has at least a parameter that failure is set
Illustrate:
Be provided with a plurality of parameters simultaneously a configuration-direct the inside, have only and want a parameter that failure is set, state is 0x01 just, and data content is the TLV value of the parameter of failure, and all parameters all arrange success, and state just is 0x00, and the data content of response message is empty
Arrange after the parameter, need RTU to send the preservation parameter instruction and preserve parameter, DTU can initiatively not preserve the parameter after arranging.
Preserve parameter instruction
Slave computer sends preserves parameter instruction, slave computer → DTU
Return after DTU receives successfully and preserve parameter instruction response message, DTU → slave computer
State:
0x00 preserves the parameter success
0x01 preserves the parameter failure
Remarks:
DTU preserves parameter to be needed about 10S, and DTU will preserve in parameter and just give the RTU response packet after finishing, and suggestion RTU does other operations after wait DTU replys again after sending this and preserving parameter instruction.
Reset instruction
Slave computer sends reset instruction, slave computer → DTU
Return the reset instruction response message after DTU receives successfully, expression receives the slave computer instruction, prepares to reset DTU → slave computer
Protocol data (GPRS) transparent transmission
The instruction of upstream data transparent transmission (RTU → DTU):
Slave computer sends the instruction of upstream data transparent transmission to dedicated tunnel, and DTU receives this instruction back no response, and directly the data content with the instruction of upstream data transparent transmission passes through dedicated tunnel;
Format description:
Channel number: 1 byte, value 0~4,0 expression sends to all passages, greater than representing only to send to special modality at 0 o'clock;
Data content: maximum 1024 bytes are the business datum content.
Remarks:
If slave computer sends data and do not meet above-mentioned form, then pass through all passages as business datum;
The instruction of downlink data transparent transmission (DTU → RTU):
When enabling " the GPRS descending protocol of RTU-DTU " after, DTU passes through RTU after the DSC data encapsulation that receives is become following form, if open " the GPRS descending protocol of RTU-DTU ", then directly with the data penetration transmission of DSC to RTU.
Format description:
Channel number: 1 byte, value 1~4, expression Data Source passage
Data content: maximum 1024 bytes are the 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 of receiving.
If receive that the data of DSC are divided into a plurality of bags above 1024, DTU and send to RTU;
Agreement note (SMS) transparent transmission
The instruction of upstream data transparent transmission (RTU → DTU):
Format description:
Destination number: 32 bytes, the recognition purpose phone number if there are not 32 bytes, must be mended 0x00
Data content: maximum 1024 bytes are the note data content that will send
The instruction of downlink data transparent transmission (DTU → RTU):
When enabling " the SMS descending protocol of RTU-DTU " after, DTU by following form encapsulation, is transmitted to RTU with the note received again.
Format description:
Source numbers: 32 bytes, sign note source numbers, less than 32 bytes, DTU can mend 0x00 and handle;
Data content: maximum 1024 bytes are the note data content that receives
Remarks:
When not enabling " the SMS descending protocol of RTU-DTU " time, DTU will not carry out any encapsulation to the note of receiving, directly pass 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 the TLV form:
Type(2Bytes) + Length(2Bytes) + Value(NBytes)
Type:
State ID number, high byte is represented the big class of state, low byte is illustrated in the sequence number in the big class parameter.
Length:
The length (be unit with the byte) of expression Value, high byte is preceding.
Value:
NBytes, the state content
A plurality of TLV bags can be arranged in the data content, but length can not surpass 1024B.
The state ID of supporting mainly comprises following content at present:
The state parameter table
The GPIO control command
RTU→DTU:
Format description:
GPIO data format=GPIO sign+length mark+level sign+level time+level sign+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):
The output of 0x00 low level
The output of 0x01 high level
Level time (2 byte):
High byte is preceding, the 100ms of unit
The GPIO data once can arrange a plurality of IO mouths by above form packing, in the IO mouth a plurality of level states can be arranged
DTU returns response message after receiving successfully, DTU → RTU:
Status indicator:
0x00 represents that the GPIO data of receiving are correct.
0x01 represents the GPIO data of receiving wrong (all wrong or part is wrong).
Data content:
If status indicator is 0x00, this is free of data (0 byte), if status indicator is 0x01, this content is wrong GPIO data.
Line traffic control instruction up and down
Have only when the mode of reaching the standard grade of DTU is configured to " RTU control is reached the standard grade " and has opened " RTU-DTU communication protocol " function, this control command just can come into force, otherwise this control command will not produce any control effect.
Two kinds of modes of reaching the standard grade of other of DTU are respectively to trigger and reach the standard grade and online dual mode always, do simple declaration at three kinds of application modes below:
If RTU producer wishes to reach the standard grade automatically after the DTU start, and keeps 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 transfer of data is arranged, automatically roll off the production line during the free of data transmission, can be WAKE by the mode of reaching the standard grade of configuration DTU then, as required the time of rolling off the production line free time is adjusted simultaneously and get final product that (giving tacit consent to the time of rolling off the production line free time is 0, do not roll off the production line automatically after namely reaching the standard grade, if be configured to 60, representing did not have professional transfer of data in 60 seconds, and DTU rolls off the production line automatically)
Whether reach the standard grade if RTU wishes to control DTU, then the mode of reaching the standard grade with DTU, and need to open this RTU-DTU communication protocol if being configured to CTRL.
In case after so disposing DTU, the original flow process of rolling off the production line on the DTU is revival not, transfer to RTU producer fully and control and roll off the production line on the network, if not the producer familiar to network control, suggestion is not configured to this pattern, otherwise will run counter to desire.
RTU sends control PPP line up and down, RTU → DTU
Type:
0x05---network control
Only support the 0x05 type herein at present, expansion was used after other values will be done
On the sign that rolls off the production line:
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 the sign mistake that rolls off the production line
The interim RTU-DTU agreement of opening
The RTU-DTU agreement, in the default configuration of DTU, be unsupported, if RTU needs interim this agreement of using, then can open the RTU-DTU agreement by this following special string temporarily, to not revival after restarting, DTU supports this agreement always if desired, then can dispose this parameter by configuration tool, makes its unlatching.
This instruction bag is totally 21 bytes, thes contents are as follows:
Can only there be these character strings the inside if DTU receives bag, if there are these character strings a bag the inside, but also have other data (as before 11 or also have other after 17), will not open the RTU-DTU agreement.
The receipt instruction
If opened this RTU-DTU communication protocol,
When DTU sends successfully or fails in note, will initiatively return to slave computer to the result
DTU when namely network changes, initiatively exports DTU network state value in dial-up success or failure back or when rolling off the production line
Concrete output format is seen following explanation, and state value herein when the status poll bag takes place RTU, also will be present in the response packet.
DTU→RTU
Data content:
Each parameter all adopts the TLV form:
Type(2Bytes) + Length(2Bytes) + Value(NBytes)
Type:
2 bytes, high byte is preceding
0XF011 represents short message sending status
0xF003 represents network state
Length:
2 bytes, high byte are 0x0001 preceding herein
Value:
1 byte
When type is note,
0x00-note sends successful 0x01-note and sends 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 is used for receiving the instruction that RTU issues; Described instruction comprises: frame head, function code, frame length, verification and, data content and postamble; Described function code is used for the classification of this instruction of expression; Described data content is used for carrying the data of this instruction;
Described DTU be used for to resolve this instruction, identifies this data content according to the function code that this instruction is interior, and RTU is returned the response message of this instruction, and described response message comprises: frame head, function code, frame length, verification and, 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 instructs, arranges parameter 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, line traffic control instruction and receipt instruction up and down.
Optionally, when described instruction was the query argument instruction, described DTU specifically was used for resolving described query argument instruction;
If described query argument instruction errors, the corresponding string data of the described query argument instruction of DTU sends to DSC as business datum;
If the data content of described query argument instruction is empty, or the ID of the data content in the query argument instruction is whole not in the parameter list that sets in advance, and DTU returns the response message of query argument instruction, and the data content of described response message is empty;
If have a plurality of ID numbers in the instruction of described query argument, there be part ID number not in the parameter list that sets in advance in described a plurality of ID numbers, then DTU skips described part ID number, handles in a plurality of ID numbers other ID numbers except described part ID number.
Optionally, when the classification of described instruction when preserving parameter instruction, described RTU is used for after sending described preservation parameter instruction, receive the response message of the described preservation parameter instruction that described DTU returns after, send instructions under continuing.
The above only is preferred embodiment of the present invention, not in order to limiting the present invention, all any modifications of doing within the spirit and principles in the present invention, is equal to and replaces and improvement etc., all should be included within protection scope of the present invention.

Claims (6)

1. the exchange method of a 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, verification and, data content and postamble; Described function code is used for the classification of this instruction of expression; Described data content is used for carrying the data of this instruction;
DTU resolves this instruction, identifies this data content according to the function code in this instruction, and RTU is returned the response message of this instruction, and described response message comprises: frame head, function code, frame length, verification and, 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 instructs, arranges parameter 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, line traffic control instruction and receipt instruction up and down.
2. method according to claim 1 is characterized in that, when the classification of described instruction was the query argument instruction, described DTU resolved this instruction, identified this data content according to the function code that this instruction is interior, and the response message that RTU returns this instruction is comprised:
DTU resolves described query argument instruction;
If described query argument instruction errors, the corresponding string data of the described query argument instruction of DTU sends to data service center DSC as business datum;
If the data content of described query argument instruction is empty, or the ID of the data content in the query argument instruction is whole not in the parameter list that sets in advance, and DTU returns the response message of query argument instruction, and the data content of described response message is empty;
If have a plurality of ID numbers in the instruction of described query argument, there be part ID number not in the parameter list that sets in advance in described a plurality of ID numbers, then DTU skips described part ID number, handles in a plurality of ID numbers other ID numbers except described part ID number.
3. method according to claim 1 is characterized in that, when the classification of described instruction was the preservation parameter instruction, described method also comprised after the instruction that DTU reception RTU issues:
RTU after sending described preservation parameter instruction, receive the response message of the described preservation parameter instruction that described DTU returns after, send instructions under continuing.
4. the interactive system of a remote terminal unit RTU and data transmission unit DTU is characterized in that described system comprises: DTU and RTU;
Described DTU is used for receiving the instruction that RTU issues; Described instruction comprises: frame head, function code, frame length, verification and, data content and postamble; Described function code is used for the classification of this instruction of expression; Described data content is used for carrying the data of this instruction;
Described DTU be used for to resolve this instruction, identifies this data content according to the function code that this instruction is interior, and RTU is returned the response message of this instruction, and described response message comprises: frame head, function code, frame length, verification and, 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 instructs, arranges parameter 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, line traffic control instruction and receipt instruction up and down.
5. system according to claim 4 is characterized in that, when described instruction was the query argument instruction, described DTU specifically was used for resolving described query argument instruction;
If described query argument instruction errors, the corresponding string data of the described query argument instruction of DTU sends to DSC as business datum;
If the data content of described query argument instruction is empty, or the ID of the data content in the query argument instruction is whole not in the parameter list that sets in advance, and DTU returns the response message of query argument instruction, and the data content of described response message is empty;
If have a plurality of ID numbers in the instruction of described query argument, there be part ID number not in the parameter list that sets in advance in described a plurality of ID numbers, then DTU skips described part ID number, handles in a plurality of ID numbers other ID numbers except described part ID number.
6. system according to claim 4 is characterized in that, when the classification of described instruction is the preservation parameter instruction, described RTU, be used for after sending described preservation parameter instruction, receive the response message of the described preservation parameter instruction that described DTU returns after, send instructions under continuing.
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CN107343003A (en) * 2017-07-07 2017-11-10 四川铭扬通信科技有限公司 The communication means and system of data transmission unit and remote terminal

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