TWI376117B - - Google Patents

Description

IX. Description of the Invention: [Technical Field] The present invention provides a method for detecting response time under a master-slave communication protocol, which is calculated by the slave station device's response time to a preset Mo dbu ε request A precise response time is obtained, and the precise response time is applied to the official communication period of the master/slave end, and the master station device can issue the function of executing the relevant instruction or command at a very precise time point. [Prior Art] According to the rapid evolution of communication technology, its derivative communication network has also developed rapidly. According to its size, it can be divided into regional network and wide area network. The regional network is composed of Many of the same network architectures complete the regional network, while the WAN is a large network of many regional networks, and its services and connections can be spread across the country and even the world. Whether it is a regional network or a wide area network, the common basic architecture is the Ethernet (Ethernet), and in the Ethernet, there is a hub that uses fiber or stranded cable as the transmission line. Network, such as a switch (tch) or a router (RQuter), and by means of a network packet relay device and a transmission line, a unique regional network, as well as a computer or other device, such as a monitoring system, Security systems and automation are able to transmit or control data 'instructions'. In addition, another network architecture commonly used in industrial applications is 1376117.

Modbus, Modbus is a sequence type developed in 1979 and "& 1 protocol, touch QdbUs originally used for the most combat with programmable logic control l〇glc c〇ntr〇; Pr〇 Grammable 0 1 1 er S or PLC s) = After the evolution of money, M〇dbus has gradually become an industry

It is said that the device under the MQdbus architecture has become a tool for various industrial electronic devices, and the first reason for its widespread use in various fields is that the Modbus standard is open and does not need to be paid. The premium 'first' is that the architecture can be modified and applied to the entity in a short time' and the M 〇db US architecture allows the transfer of raw bits (rawb 1 ts) or text 'without Limited to the developers is the third reason why Mo db us is widely used.

However, since the M〇dbuS system is a master/slave-related communication protocol, the master station device must be viewed from the time of the _, and cannot be simultaneously _, and then The device is configured with a unique button so that the slave device can communicate with the master device correctly, and only the slave device that wants to communicate with the master device will process the command or command issued by the line device, regardless of Whether other lion devices have (4) the command or order. Since the Mo dbus system is a master/slave communication protocol, and the master station device must be viewed on a _ slave station device, the problem derived from the lining is how to learn the slave device and the main post. The response of the issued order 6 1376117 time, in general, the current Mo db us slave response time is mostly determined by the user based on empirical rules or tests such as empirical rules or error verification (tr丨a丨anderror) However, such a less rigorous verification method is prone to problems such as inaccurate response time, high cost and time-consuming manual verification, and unsuitable response time, which may cause the system to be inoperable. For example, Industrial production lines (such as fabs, plastics factories), etc., if the response time required by the slave device cannot be accurately obtained, so that the master station device cannot be at the correct time, or the slave device cannot The correct time to execute the command of the line device, the financial system may completely interrupt the production line or an abnormal phenomenon, and lead to dysentery or even damage in the production line of the rainbow industry. Destroy; in addition, such as temperature control in the building control, escape system, etc., because these actions are extremely necessary at the right time _ do positive tampon, and therefore if you can not be in the positive two _ _ _ contingency measures, will not be Help reduce the incidence and damage caused by disasters. Therefore, the above-mentioned deficiencies in the conventional technology are necessary for those who are engaged in this industry to change their courses and to be further improved and innovatively designed by the relevant industry. SUMMARY OF THE INVENTION Nowadays, the inventor has invented such a lack of methods and methods for responding to time in response to the above-mentioned master-slave communication age. Therefore, the inventor has invented the experience of many years of research and invention in this industry, and has finally invented such a method. A method of detecting response time under a precise master-slave communication protocol. 7 The main purpose of the present invention is to obtain the response time required by the domain controller to return the Mo dbus request sent by the slave device, and the master terminal can automatically start the phase at a very precise time. Strain measures, such as Shiyu's automatic control system, etc., because these actions have the requirements of _sheng and positive time-point triggering, so if the (10) can be calculated from the correct response time, the host or manager will be able to When it is extremely accurate, the contingency measures, rather than being too early or too late, can help reduce the probability of disasters and the losses caused: the installed side is scattered, and it is not through experience. The law or the wrong verification force = to get - the general response time, and make the wrong time point effect. The number two!! The purpose of the invention is that the invention can utilize different functions of the function. For example, the slave axis of the Chengda and the minimum solution should be the steel-delay time of the user's industrial or technical technology. The field is to be precise r: the use of empirical rules or false verification methods to take advantage of the general response time. The second purpose is to make the MG db U s gradually two = two communication standards. Therefore, the method of the master-slave communication protocol 2== time of the present invention will not require the addition of devices or components of the real Zhao. And ==:dbu is called the invention only needs to be set by the software to be able to switch between scales and scales, because "the cost of purchasing a physical device of 1376117 is not required." [Embodiment] In order to achieve the above structure, and in order to enable the members of the investigation committee to have a better understanding of the purpose and the purpose of the present invention, the technical means of tearing off the _ _ _ _ _ _ _ _ _ Add _ as follows, fully understand

First of all, the specification first explains the RTU and ASCU aspects under the M〇dbUS architecture actually used in the present invention, and further implements the technique of implementing the miscellaneous money through the steps of the flow and the operation of the miscellaneous money (4), so that the review committee can Have a clearer understanding.

From the above, we have clearly learned that M〇dbus is a master/slave communication protocol. In general, Mo dbus allows different slaves to connect to the master device in the same network. Under the Mo dbus wire structure, there are two standard architectures. The first meaning is to be more streamlined and use binary to present data. _Q dbus rt^ Grid 'Second _ is more Mq db us RTU; ^ is longer And the Modbu s ASC II specification with human readability to present data, and the same characteristics of the two are transmitted in the order of the preamble, and the request of the master device to the slave device is only A request can be transmitted at the same time point, however, a detailed description of the Modbus RTIJ/ASCII second standard is described in more detail later in this description. 9 See the first and second figures,

MnHh (10) is not a preferred embodiment of the present invention.

The Modbus RTU/As ^ ^ architecture is not intended to be the preferred embodiment of the present invention. The MQdbus R, the one-ASCII communication diagram is clearly shown in the figure. There is a slave station t 2 ' and the master/slave interaction can be issued by the master station device 1 to the slave station device and the request includes a function code (Function cod 〇 and request data (Data reQuest), and the slave station device 2 Receiving the threat from the war 1, if the slave 2 supports this request, the slave device 2 has a response to the function code (F un ^ ti 〇 ^ C〇d〇 and Data response). Master station device 1' However, if the slave station device 2 does not support the request of the master station device, the slave station device 2 years old has an exception function code (

Exception function code) The response of the Exception code to the master device. Referring to the first and second figures, in conjunction with the third embodiment, it is a preferred embodiment of the present invention. Schematic diagram of the dbus RTU/ASCII communication architecture, the Mo dbυ s RTU/ASCI I communication diagram of the preferred embodiment of the present invention, and the M〇dbus RTU/ASCII test flow chart of the preferred embodiment of the present invention are shown in the third figure. It is clear that the test procedure is as follows: (1 0 0) start detection; (1〇1) - to the slave device 2, the master station device 1 sends a MOD B us request [and records the transmission time (TSm); 2) = station device 2 receives the m〇d β w request sent by the master station device; if not, the execution (1〇3) from the transposition 2 touch supports this request, 0 5); the result is echoed, executed (1 〇 4 Ship loading 12 performs the request and transmits the correct '10 6); :1〇5) transmits the exception response from transpose 2, executes 1〇6)=device 1 receives the correct/case corresponding, and records the receiving time (Dm m=TRm-TSm. 10 7) Calculate the response time r $ 1 Execute (101 0 8) to determine whether to perform the next_time_, if yes, ) 'RS f = F η RS ν+1); (10 9) Calculate the exact response time (r $ RSi » Rs2 , (11 ο) to complete the detection.

And recording the reception time (TR in short, 'the invention first transmits the M0D BUS request to the slave station device 2 through the master station device i, and records the transmission request time (TS1)', then the master station device 1 The response m slave will be received from the slave device 2, and the response time (Rs 1376117 TRm - TSm) will be calculated. However, after repeating the above steps n times, TSn+ι and TRn+i can be obtained each time and the response time RSn is calculated. +1, and finally obtain the accurate response time RSf by substituting the obtained RSi, rs2, ...' rsn+1 into the predefined function Fn (RSi, RS2, ..., RSn+i); however, on the above-mentioned master-slave end In the function used to detect the response time, the average response time plus the delay (de 1 ay ) time can also be used to calculate 'so the F η () can be:

RSf =Fn (RSi,RS2,...,rSn+1)

YrSm M=\ \N^\) T Offset In addition, the function used in the above-mentioned master-slave_response time method can also use the longest time plus deiay time to calculate ' Therefore, the F η () can be: RSf =Fn (RSl'RS2,...,RSn+〇

MAX (RSl,rS2 ’ ...,

RS N+ 1

The SET TOff phase is consistent with the requirements of the Μdbu ε RTU/ASCI I standard specification packet format, please refer to the fourth and fourth diagrams. 'The MQdbus Rtu standard specification packet format is not intended and Mo dbus δ 〇r τ τ , DUS ASCH standard specification packet format in the figure 8 'the main difference is the coding method, M〇dbUS ASCI1 slave address, function code and data block is 12 υΐΐ / will be 4〇dbus The 16-bit value of each tuple (byte) of the same block of the RTU is converted into two 〇_9, a-f ASCI I-characters (char), and the Mq dbus RTu packet format includes a ring. Check and (cyclic redundancy checksum or CLC), the overall package is more streamlined, and the Mo dbu s ASC jj packet format includes a linear check of the longitudinal redundancy a ecksum or lrc), a yarn character and two ends Characters, the overall package is rather verbose, and R Tu/A scrj are the most dominant = ^ the same _ both are transmitted in a sequence, so the rule js CI I can use the above method to respond Time detect When, in response to detection of the main terminal protocol Yau volume months

Limit the function code (f υ nc ti 〇n code) contained in the RTU/AS Γ τ TII and the operation of the slave θ 响 slave station device, you can use ^, and in practice, to avoid _ Return to the query data (retur η query ή ά f ^ ta' function code is 〇χ〇8, sub-function code (sub-funct·v line IKreaci eQ ^ GQde) is QX (10)), read amount input (read d S, Function code 〇X〇1), read discrete code 0 and 0 2), continue to take the "1^161111" 111:3' function... 2: memory (...". 1ding gong 〇 code X〇3) Read the wheel register (13 1376117 ... d input regi st ... ) or the user-defined function code as the M 1 code 〇 x 〇 4 u DU s ^ See the fifth figure, After the technical content and method of the response time of the invention/applicable to the dry slave station of the Modb u S master station device, the response time (RSf) described above by the master station device is actually applied to the official communication period: obtained Accurate ^ device 2 in the official operation and transmission of data or command, etc. = 3 period, so the master station device 1 will use the room (RL) in the official communication period to scale (4) with the rhyme response Station to wear home? The secret material #1 in that - the gamma point can get the response from the = set 2 'by this, the main station device does not need to pass through the test room, such as the use of the test The six figures show the schematic diagram of the door-to-door (4) busdbus communication closed-circuit application of the detection slave station of the present invention, and the Modbus communication gateway between the temples can be connected with the slave station. 3, to use the material shechuan _ spray 4 and =1, should be time USF), and wait for Modbus communication to close = set the precise response time (RSf), then the exact response time can be applied to the remote device 3, communication The official communication period of gateway 4 and slave device 2 is therefore during the interaction of one, Modbus communication channel 4 will be able to use the precise response time (RSf) to accurately determine the communication _ at that time 14 1376117 time point _ The slave device 2 transmits a _ or step-by-step interaction with the remote device 3. However, the preferred embodiment of the primary station device used in the above description is only the method for the lower side response time of the master-slave communication protocol of the present invention. However, in practice, the -Mo dbus communication gateway can be used. Separate equipment with functional functions or other electronic devices such as Gai Huai or Towels, which have the requirements for issuing jobs: In addition, the above descriptions are issued by the main station, and the types of requirements may be as Read multiple registers (rea (1 hQl (Ung registers) or return query data (retu『n Query data) and other different requirements of the instructions; in addition, the operation function used in the above description, in the real shot can also In order to calculate the response time of the average coffee, the shortest time of the longest time gate, or the delay time of the above-mentioned one time, the above-mentioned detection device with the test request, different kinds of request instructions, different arithmetic functions, etc. The scope of the invention is intended to be protected, and the above-mentioned simple modifications and equivalent structural changes are equally included in the scope of the patent of the present invention, and are combined with Chen Ming. Compared with the conventional technology, it has the following advantages: (-) Generally used in traditional building automation applications, most of them are planned with near/distal or master/slave devices, and all event management and strain It will be connected to the computer in the main control room through a transmission interface. When there is a situation, the personnel in the main control room or the computer will issue commands to the external wheel 15 to perform some specific actions, for example, if the temperature is too high. When the cooling fan is turned on, the safety is out of phase, the county is brighter, or the temperature exceeds the fire preset temperature. The coffee starts from the water, because these actions are instantaneous and correct when the trigger is required, so if the slave device can be calculated The correct response _, the host or manager will automatically start the phase _ strain at very precise time _, without triggering the relevant device at a premature or late time point, which will help to reduce The probability of disasters and the losses they cause and the evacuation that can help people effectively eliminate the need to use empirical rules or false verification methods as in the case of conventional techniques. Obtain a general response time' and make a wrong time point judgment. (1) Due to the current response time of the Mo dbus slave, the user is often verified according to the rule of thumb or error (tria 1 and ei* rq) Experience or embarrassment to decide, the less stringent verification method of age b is easy to cause the response time obtained is not accurate and if it is not suitable for the arbitrarily, it may cause the secret to be unable to run. Therefore, the industrial production line (such as : fabs, plastics factories, etc., if the correct rectification space required by the slave device cannot be accurately obtained, the master station device cannot deliver the correct command at the correct time, or the slave device cannot be correct. At the time of the execution of the command of the master station, it is possible to completely smash the production line or cause an abnormal phenomenon, and cause mechanical defects or even damage on the industrial production line, so by calculating the precise response time (RSf) of the master/slave end. It is also used in the official communication period between devices. The master will be able to accurately determine the time point of the trigger event and avoid the confusion of the event trigger time. (iii) The present invention can utilize function functions of different functions: if the maximum, minimum or average slave response time is obtained, or further combined with a delay time, the user can make precise settings for a specific industrial or technical field. There is no need to use a rule of thumb or error verification as a conventional technique to achieve a general response time. (d) Due to the evolution of the generations, d0 dbus has gradually become the communication standard in the industrial field, and the singularity in accordance with the M 〇dbus architecture has become a universal connection to the various electronic industry Μ anus, so the I slave communication by the present invention The method of detecting the response time under the agreement will not require the addition of physical devices or components, and the lightness and wideness of the _Q dbus architecture. The present invention only needs to pass the mosquito or silk to complete the accurate response time acquisition. The cost of the implementation of the slave device will not be affected by the direct use of the command of the M〇db us standard specification. Therefore, the command used will not affect the normal operation of the slave device. In addition, whether it is the G db 1^ master station device or the Mo db U 3 gateway, the response time from the 1376117 station will be calculated by the software. The user will not need to manually set the time from the Lange, avoiding sighs. It is not appropriate to take care of the secret operation problems caused by the time, and affect the customer's confidence in the product and return it. The above disclosure is only a preferred embodiment of the present invention, and it is not possible to use the invention as a specialization. Therefore, the average amount of money made by the patent scope of the present invention is reduced. Within the scope of the patent covered by this release. The method of detecting the response time under the master-slave communication protocol of the present invention is indeed effective in terms of its efficacy and purpose, so the present invention is an invention that is excellent in practicality. The requirements are in line with the industry's Xiang nature, new nature and progressive ''application according to law, and hope to grant this case as soon as possible to protect the inventor's hard work of inventing'. If there is any ship in the bureau, please do not hesitate to instruct or invent People will try their best to cooperate and feel polite.

18 1376117 BRIEF DESCRIPTION OF THE DRAWINGS The first figure is a schematic diagram of a communication architecture of Mo d b u s RTV/ A S CI I according to a preferred embodiment of the present invention. The second 11 is a preferred embodiment of the present invention Μ o d b u s R τ υ κ A S CI I communication diagram β

The third figure is a flow chart of the Mo d b u s RTU/ A S C I I test of the preferred embodiment of the present invention. The quaternary system is a VI o d u s diagram. R D U standard specification packet format

The fourth A picture is a schematic diagram of M〇db A. The ASCI1 fresh job package format The fifth picture is a schematic diagram of the present invention using the response time of the slave station to be applied to the 〇 dbUs master station device.

The sixth figure is a schematic diagram of the present invention using the response time of the detecting slave to be applied to the 〇 dbUS passway. [Main component 1, master station device 2, slave device 4, 3, remote device, description, communication gateway 19

Claims (1)

1376117 X. The scope of application for patents··1. A method of _response time under the master-slave communication protocol, especially the method of calculating the time required by the station device under the ____ , Q Q db U Sit. One of the agreed frequency Whs RTU and M〇dbus Asc^ I, the method includes: _ device sends a M〇dbus at the same time point, sub-record the sending time; Straight = ^ Receive __ sent dbus request, and generate a response 'This response includes the correct result _ and the exception response detection device receives the response from the slave device, and records the receiving time; and the reception received back ^ The two-station device root tree detection device M 〇dbus requires the required response to be received after receiving the preset -d, us request, the exact return 2, = the primary and secondary communication protocol described in item 1. The next test response time method 'where the response time is the Mo dbu 3 standard specification resP〇nse time-out. 3 The method of the master-slave communication protocol as described in the patent application of claim 4, wherein the calculation accurately responds to the response time of 1 time, and the purchase between the two is 20 [ja ij, 2 3 In the master-slave communication protocol, the response is measured. = Method 'The calculation method for calculating the exact response time can be added - delay time, or other operations. 5. The method for detecting the response time under the master-slave communication protocol as described in the scope of the patent application, wherein the equation for calculating the response time may be: R Sm = TRm-T Sm " the RSm is the response time 'TRm is the time to receive the slave = when it is _ ' TSm is the time for the detection device to send the request to the slave device 6 Scope of the range of the primary and secondary communication protocol detection response time described in item 2... The equation for obtaining the average time of the exact response time is: /Ul J]rsm :M=\ Sf n (RSi ' RS2,...,rsn+1) ,(#+1) in the basin]7 nf N =S1,.. is the exact response time of the slave device for nRSF, and RSn+1 is the response time for the period. 7. For example, the method under the master-slave object described in the object _ item 2, wherein the equation for obtaining the maximum value of the exact response time can be used for time 仏... (RSi, RS2'..., RSn+i) ” , , . , AX (RSl, RS2,.. JL P ^ ^ N + 1 ) Eight n () is the "function" RSf is the exact response time from the call of the nickname m RSl, ·.., RS ' Response time for the period. 21 1376117 Year Θ Month 24; Application for Amendment Date 8. Method for detecting response time under the master-slave communication protocol as described in item 1 of the patent application scope, if the 4-station device does not support the M 0 dus request of the master station device' The slave device can further send an exception response. 9. The method for detecting response time under the master-slave communication protocol described in claim 1 of the patent scope, wherein the 2M 〇dbus request sent by the detecting device is a return inquiry data (function code 〇x〇8, Secondary function code 〇χ〇〇), read coil (function code 0x01), sell and sell discrete input (function code 〇 〇 2), read multiple registers (function code 0χ03) or read input The instruction of the scratchpad (function code 〇Χ〇 4). 10. The method of claiming the response time under the master-slave communication protocol as described in item i of the patent scope, wherein the precise response time can be further applied to the official communication period of the master/slave device. 11 For example, the scope of the patent application scope (the method of the debt response time under the master-slave communication protocol described in the item), wherein the precise response time can be used for the formalization between the master/slave device and the remote device. The communication period. 12 The method for detecting the response time under the master-slave communication protocol as described in the first item of the application of the invention, wherein the detection device can be the MQ db US master device, the M 〇dbus communication gateway. Or a separate device with fine functions. The method of detecting the response time gate under the master-slave communication protocol described in Item 1 of the patent is as follows: The correct result response includes the function code and the reply data. The primary and secondary communication ages described in 1 item "R贞回回麟22 1376117 The method of correcting this S9.1Z2 3, wherein the exception response includes an exception function code and an exception code. 23 L376117 X Η—, pattern: 24 f MODBUSWS MODBUSsemB 1376117 13761.17 1376117 s Η 1 byte (lbyte) Slave address Slave address 1 byte i (lbyte) Function code Function code S g .0 stealing data Data 2 byte Gbytes) Ring check and CRC 13761.17 嘁SAa 1 character (lchar) Start character Start char 2 characters (2chars) Slave address Slave address 2 characters (2chars) Function code Function code 0-504 characters (0 up to 504 chars) Data 2 characters (2chars) ) Linear check and LRC 2 characters (2chars) End End 1376117 is is L factory MODBUSh+s潲 Η MODBUS 潲 L L J J 1376117 Remote device MODBUS communication gateway MODBUS slave device