CN107147552B - Method and device for remotely controlling return letter reading - Google Patents

Method and device for remotely controlling return letter reading Download PDF

Info

Publication number
CN107147552B
CN107147552B CN201710283963.0A CN201710283963A CN107147552B CN 107147552 B CN107147552 B CN 107147552B CN 201710283963 A CN201710283963 A CN 201710283963A CN 107147552 B CN107147552 B CN 107147552B
Authority
CN
China
Prior art keywords
remote control
control command
return
station equipment
request
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN201710283963.0A
Other languages
Chinese (zh)
Other versions
CN107147552A (en
Inventor
贺学文
贺本彪
张保航
刘小树
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beijing Helishi System Integration Co ltd
Original Assignee
Beijing Hollysys Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Beijing Hollysys Co Ltd filed Critical Beijing Hollysys Co Ltd
Publication of CN107147552A publication Critical patent/CN107147552A/en
Application granted granted Critical
Publication of CN107147552B publication Critical patent/CN107147552B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1685—Details of the supervisory signal the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]
    • H04L12/40—Bus networks
    • H04L2012/40208—Bus networks characterized by the use of a particular bus standard
    • H04L2012/40228—Modbus

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)

Abstract

The invention discloses a method and a device for reading remote control return messages, wherein the method comprises the following steps: the master station equipment sends a remote control command to the slave station equipment; and when the return letter reading delay time corresponding to the remote control command is reached, the master station equipment sends a remote control return letter request to the slave station equipment so as to obtain the remote control return letter of the slave station equipment. The embodiment of the invention can realize that the reading time of the remote control return message is irrelevant to the number of the devices and the size of the polling list, and realize the rapid and stable remote control return message with less time delay and small fluctuation, thereby improving the automation level.

Description

Method and device for remotely controlling return letter reading
Technical Field
The invention relates to the field of industrial automation, in particular to a method and a device for remotely controlling return letter reading.
Background
The polling protocol is a communication protocol widely used in the field of industrial automation, and common industrial automation field polling protocols are as follows: modbus, IEC60870-5-101, IEC60870-5-103, etc., which have become common industry standards, are widely used in the field of automated communications. The polling protocol is also usually a bus-type (bus) protocol, and communication uses Master-Slave technology, i.e. only one Master device can initiate transmission (inquiry, also called request, and in turn inquiry is called polling) at the same time, and the Slave device responds accordingly according to data provided by the inquiry of the Master device. The master device can communicate with the slave devices individually or, in some cases, with all the slave devices in a broadcast manner. The slave device returns a message in response if communicating alone, and no response if queried in a broadcast manner.
As shown in fig. 1, when preparing a new request, the master device initially preferentially checks whether a remote control command needs to be sent, if so, obtains remote control information and generates a remote control message, sends the remote control message and then starts a reception timeout timer, and if successfully receives a response from the slave device within a timeout period, it indicates that the remote control transmission is successful, but this only indicates that the slave device successfully receives the command, and if so, it needs to be seen only by a real remote control return point read by the master device through the transmission request. Because the remote control processing is usually asynchronous response, that is, after receiving a remote control command, the slave station device checks whether the current conditions required for executing remote control are met, then sends a corresponding response to the master station device first, and then executes remote control, if the remote control is successful, the information of a corresponding remote control return point is updated to the slave station data area for polling update of the master station device, only when the master station device polls the information, the master station device can know that the remote control is really successful, and the problems of long read remote control return delay time and large time fluctuation range of the return time are existed.
Disclosure of Invention
In order to solve the technical problem, the invention provides a method for remote control return letter, which can shorten the delay time for reading the remote control return letter, reduce the time fluctuation range of the return letter time, and realize that the reading time of the remote control return letter is irrelevant to the number of devices and the size of a polling list.
In order to achieve the purpose of the invention, the invention provides a method for remotely controlling return message reading, which comprises the following steps:
the master station equipment sends a remote control command to the slave station equipment;
and when the return letter reading delay time corresponding to the remote control command is reached, the master station equipment sends a remote control return letter request to the slave station equipment so as to obtain the remote control return letter of the slave station equipment.
In order to achieve the object of the present invention, the present invention further provides a device for reading remote control return messages, which is applied to a master station device, and comprises:
the first sending module is used for sending a remote control command to the slave station equipment;
and the second sending module is used for sending a remote control return request to the slave station equipment by the master station equipment when the return reading delay time corresponding to the remote control command is reached so as to obtain the remote control return of the slave station equipment.
Compared with the prior art, the embodiment of the invention comprises the following steps: the master station equipment sends a remote control command to the slave station equipment and starts timing; and when the return letter reading delay time corresponding to the remote control command is reached, the master station equipment sends a remote control return letter request to the slave station equipment so as to obtain the remote control return letter of the slave station equipment. The embodiment of the invention optimizes the defects that the reading delay time of the returned remote control messages is longer when the number of equipment is larger and the polling list is larger in the remote control method in the prior art, the reading time of the remote control messages is completely irrelevant to the number of the equipment and the size of the polling list, and the rapid and stable remote control messages with less time delay and small fluctuation are realized, so that the automation level is improved.
Furthermore, by configuring the return letter reading delay time corresponding to each remote control command, the return letter reading delay corresponding to each remote control command can be accurately configured according to the actual condition of the equipment, and the reading efficiency of the remote control return letter is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the example serve to explain the principles of the invention and not to limit the invention.
FIG. 1 is a flow chart of a prior art polling process with remote control;
FIG. 2 is a polling presentation intent of a polling protocol;
FIG. 3 is a flowchart of a method for remote control return message reading according to an embodiment of the present invention;
FIG. 4 is a flow chart of polling with remote control according to an exemplary embodiment of the present invention;
fig. 5 is a schematic diagram of a remote-control return message reading apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
The steps illustrated in the flow charts of the figures may be performed in a computer system such as a set of computer-executable instructions. Also, while a logical order is shown in the flow diagrams, in some cases, the steps shown or described may be performed in an order different than here.
In this context, remote control return means return of a deflection signal by remote control operation (e.g., performing on/off) of an automation system, that is, feedback of a remote control result from a station device; the remote control return point refers to a logical unit (for example, an on/off state) of information required to be fed back from the station apparatus as a result of executing the remote control command. When the slave station equipment receives a remote control command of the master station equipment and executes the remote control command, the information of the remote control return point is updated to the slave station data area, when the slave station equipment receives a remote control return request sent by the master station equipment, the data in the data area is inquired, a response message is returned to the master station equipment, and the response message carries the remote control return message.
In different polling protocols, technical terms may be called differently, and all requests for reading uplink data in a polling protocol may be collectively referred to as three-remote requests (remote signaling, remote sensing and remote pulse), and all devices may be set up as three-remote requestsThe summary of the backup three remote requests may be referred to as a polling list. In the prior art, the remote control return point is covered in a polling list (as shown in fig. 2, the total number of requests in the polling list is recorded as N), the request including the remote control return point (hereinafter, this request is abbreviated as Rx) is usually a normal request, and other requests are a priority, and are queued to wait for polling. In other words, after sending the remote control command, the master device will still obtain the next request to be sent from the polling list in the previous polling order. Therefore, the fluctuation range of the interval time (denoted as Ts) after the master station transmits the remote control command until the master station obtains the remote control return message is TsMinimum size～TsMaximum ofWherein, in the step (A),
Tsminimum sizeThe time (hereinafter, Tx) when the device is successfully remotely controlled plus the time (hereinafter, Tr) elapsed after the remote control reply request is sent until the response is received; wherein, Tx means the time that the slave station device successfully returns the remote control signal point setting value in the device data area after the master station device transmits the remote control signal;
Tsmaximum ofTx + (N × request interval) + Tr;
wherein, the typical Tr time of a TCP LAN is 10 ms, therefore Tr can be ignored, therefore TsMinimum size≈Tx，TsMaximum ofTx + (N × request interval).
The expected value of Ts is Tx + (N × request interval/2).
Taking serial port Modbus RTU (remote terminal unit) communication as an example, a typical access example is a serial port accessing 10 slave station devices, each slave station device has 6 requests, the request interval time is 100 ms, the total number of the requests is N10 × 6 60, (N × request interval/2) 60 × 100/2 ms 3 s, that is, the expected value Ts is Tx +3 s, and at worst, Tx +6 s, and the fluctuation range is Tx to Tx +6 s.
In the field of industrial automation, an important index for measuring the automation level is the remote control feedback performance, obviously, the remote control feedback index Ts is slow, and the feedback speed needs to be predicted in advance without certainty depending on luck (large fluctuation range). Moreover, the larger the number of devices and the larger the polling list, the longer the return-mail-reading delay and the larger the fluctuation range of the return-mail-obtaining time.
The embodiment of the invention carries out targeted optimization aiming at the defects that the more the number of the devices is, the larger the polling list is, the longer the delay of Ts is and the larger the fluctuation range of the return time is.
As shown in fig. 3, the method for remote control return signaling reading according to the embodiment of the present invention is applicable to a polling protocol, and includes:
step 101, a master station device sends a remote control command to a slave station device;
and 102, when the return letter reading delay time corresponding to the remote control command is reached, the master station device sends a remote control return letter request to the slave station device so as to obtain the remote control return letter of the slave station device.
After step 101, if the slave station device sends a response message to the master station device, the remote control command is successfully sent; and if the master station equipment does not receive the response message of the slave station equipment after time out, the remote control command fails to be sent.
The timing may be started from the time of transmission of the remote control command, or may be started when the transmission of the remote control command is successful (when the master station device receives the response message).
When the method is adopted, if the remote control command transmission fails, the master station device retransmits the remote control command and restarts timing.
The reply reading delay time corresponding to each remote control command can be configured in advance, and is related to the action execution duration of the slave device corresponding to each remote control command.
After the step 102 is executed, the master station device receives a remote control return letter response message sent by the slave station device, wherein the remote control return letter response message carries a remote control return letter.
And if the remote control return letter request fails to be sent, the remote control return letter request is sent again. And if the master station equipment does not receive the remote control return-letter response message of the slave station equipment after timeout, the remote control return-letter request is failed to send.
As shown in fig. 4, a polling flow chart with remote control according to an exemplary application of the present invention includes:
step 201, judging whether a remote control command needs to be sent, if so, executing step 202, and if not, executing step 203;
the remote control command is a high-priority command, so that whether the remote control command needs to be sent is judged firstly;
step 202, obtaining remote control information, and executing step 204;
step 203, reading a request from the polling list in sequence;
step 204, generating a message;
step 205, sending a message and starting an overtime timer;
in the step, if the sent message is a remote control command, a remote control message returning timer is started;
step 206, judging whether the message is successfully received, if the overtime timer is not up to the time when the response of the slave station equipment is not received, indicating that the message is not successfully received, executing step 207, and if the response of the slave station equipment is successfully received, executing step 208;
step 207, executing timeout processing, and executing step 209, wherein the message may be retransmitted or not retransmitted according to the execution policy;
step 208, processing the received data;
step 209, prepare for next transmission;
step 210, determining whether a remote control return request needs to be sent, if yes, executing step 211, and if not, executing step 212;
when the remote control return message timer is up, the remote control return message timer indicates that a remote control return message request needs to be sent; and the remote control return letter request is a high priority command, so before the request in the polling list is sent, the remote control return letter request is sent;
step 211, obtaining the remote control return message, and executing step 213;
step 212, reading a request from the polling list in sequence;
step 213, generating a message;
step 214, sending the message and starting an overtime timer;
step 215, judging whether the message is successfully received, if the overtime timer is not up to the time when the response of the slave station equipment is not received, indicating that the message is not successfully received, executing step 216, and if the response of the slave station equipment is successfully received, executing step 217;
step 216, executing timeout processing, and executing step 218 according to the execution policy, which may be to resend the message or not to resend the message any more;
step 217, processing the received data;
step 218, prepare for the next transmission.
It should be noted that, in order to show that the remote control command is sent first and then the remote control return request is sent, the above flowchart is divided into two parts (steps 201 to 209 and steps 210 to 218) for representation; in practical application, steps 201 to 209 and steps 210 to 218 may be combined, that is, each time the process is executed, the process may first perform a judgment on whether a remote control return request needs to be sent, if yes, obtain remote control return information, if no, judge whether a remote control command needs to be sent, if yes, obtain remote control information, if no, obtain a request from the polling list, and then perform steps 204 to 209; or, each time the process is executed, the process may first execute to determine whether a remote control command needs to be sent, if yes, obtain remote control information, if not, determine whether a remote control return request needs to be sent, if yes, obtain remote control return information, if not, obtain a request from the polling list, and then execute steps 204-209. In addition, a remote control return timer is started each time a remote control command is sent. If the remote control command is not successfully received, the remote control command is resent and the remote control back-letter timer is restarted. And if the remote control return letter request is not successfully received, retransmitting the remote control return letter request. The remote control command and the remote control return request can set the maximum retransmission times, if the retransmission times are equal to the maximum retransmission times, faults can occur, the retransmission is not performed, and information such as alarms can be prompted.
In the embodiment of the present invention, the remote control reply request may be automatically sent by a driver of the master station device, or may be manually or automatically sent by an upper computer (e.g., a human-computer interface) through a configuration.
In the embodiment of the present invention, the return message reading delay time of each remote control command may be configured precisely, and the configuration may be slightly greater than Tx (time for successful remote control of the device). Tx is related to the action characteristics of the slave device, for example, the on action of a switch may require 100 ms to complete, and the off action of a switch may require 500 ms, although the return credit reading delay time of each remote control command may be different, these values are measurable in advance, and these values do not change greatly with the operation, that is, the delay time configuration of the return credit request corresponding to each remote control is completely measurable in advance and performed according to the respective remote control return credit test values. Namely: the reply reading delay time may be set to be the action execution time of the slave device corresponding to the remote control command plus a preset time, which may be a fixed short time, such as 100 ms.
Still in the above example, a serial port accesses 10 slave devices, each slave device has 6 requests, the request interval time is 100 ms (denoted as T1), and assuming that T0 ═ 200 ms, the total number of requests is N ═ 10 × 6 ═ 60.
When the remote control return signaling process in the prior art is used, the request interval (N ×/2) is 60 × 100/2 milliseconds to 3 seconds, the expected value of Ts is 3 seconds + T0 to 3.2 seconds, the worst requirement is Ta +6 to 6.2 seconds, and the fluctuation range of Ts is as high as 200-6200 milliseconds!
When the technology of the embodiment of the invention is used, a certain remote control is assumed to be configured with a corresponding return request, and the configured return reading delay time is 300 milliseconds (marked as T0a and greater than Tx), and the range of Ts is greatly reduced to T0a to (T0a + T1) milliseconds which are 300-400 milliseconds.
For example, if a subway line has 46 stations, sequential power-on and sequential power-off are required every day, taking sequential power-off as an example, it takes about 6 minutes to complete power-off of 46 stations by adopting the method in the prior art, but by adopting the method of the embodiment of the present invention, only about 30 seconds are required, so that power-off efficiency is greatly improved, and power-off time is saved.
From the above description, the method of the embodiment of the invention realizes that Ts is completely independent of the number of devices and the size of the polling list, thereby not only effectively shortening Ts, but also optimizing the actual fluctuation range of Ts. Under the serial bus, the advancement of the invention is highlighted when the more devices are accessed and the polling list is larger.
As shown in fig. 5, which is a schematic diagram of an apparatus for reading remote control return messages according to an embodiment of the present invention, the apparatus is applied to a master station device, and includes:
a first sending module 31, configured to send a remote control command to a slave device;
and a second sending module 32, configured to send a remote control return request to the slave device when the return reading delay time corresponding to the remote control command is reached, so as to obtain a remote control return of the slave device.
Optionally, the apparatus further comprises:
and the configuration module 33 is configured to pre-configure a reply reading delay time corresponding to each remote control command, where the reply reading delay time is related to an action execution duration of the slave device corresponding to each remote control command.
And the return letter reading delay time is the sum of the action execution time length of the slave equipment corresponding to the remote control command and a preset time length.
Optionally, the first sending module 31 is further configured to send a remote control command to the slave device and start timing; and if the remote control command fails to be sent, the remote control command is sent again and timing is restarted.
Optionally, the second sending module 32 is further configured to, if the sending of the remote control return request fails, resend the remote control return request.
In summary, in the embodiment of the present invention, the sending of the return request after sending the remote control command is not only included in the conventional polling list, but also can be associated with a specific remote control, so that once the remote control operation is performed, a remote control return quick reading process (the present patent) can be triggered, thereby realizing quick and stable remote control return without delay and fluctuation, and further improving the automation level.
Although the embodiments of the present invention have been described above, the above description is only for the convenience of understanding the present invention, and is not intended to limit the present invention. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (6)

1. A method for remote control of return message reading, the method being applied to a polling protocol of a master-slave technology, the method comprising:
the master station equipment sends a remote control command to the slave station equipment;
when the return message reading delay time corresponding to the remote control command is reached, the master station device sends a remote control return message request to the slave station device so as to obtain the remote control return message of the slave station device; the remote control return letter request has higher priority than the request in the polling list, and the return letter reading delay time is the sum of the action execution time length of the slave station device corresponding to the remote control command and the preset time length.
2. The method of claim 1,
in the step of sending a remote control command to the slave station equipment by the master station equipment, the master station equipment sends the remote control command to the slave station equipment and starts timing;
after the master device sends a remote control command to the slave device, the method further includes: and if the remote control command fails to be sent, the master station equipment resends the remote control command and restarts timing.
3. The method of claim 1 or 2, wherein after the master device transmits a remote control reply request to the slave device, further comprising:
and if the remote control return request fails to be sent, the master station equipment resends the remote control return request.
4. A device for remotely controlling return message reading is applied to a master station device in a polling protocol of a master-slave technology, and is characterized by comprising the following components:
the first sending module is used for sending a remote control command to the slave station equipment;
the second sending module is used for sending a remote control return request to the slave station equipment by the master station equipment when the return reading delay time corresponding to the remote control command is reached so as to obtain the remote control return of the slave station equipment; the remote control return letter request has higher priority than the request in the polling list, and the return letter reading delay time is the sum of the action execution time length of the slave station device corresponding to the remote control command and the preset time length.
5. The apparatus of claim 4,
the first sending module is further used for sending a remote control command to the slave station equipment and starting timing; and if the remote control command fails to be sent, the remote control command is sent again and timing is restarted.
6. The apparatus according to claim 4 or 5,
the second sending module is further configured to resend the remote control return request if the sending of the remote control return request fails.
CN201710283963.0A 2016-11-16 2017-04-26 Method and device for remotely controlling return letter reading Active CN107147552B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN2016110083870 2016-11-16
CN201611008387.0A CN106656704A (en) 2016-11-16 2016-11-16 Modbus protocol remote control result feedback information reading method and device

Publications (2)

Publication Number Publication Date
CN107147552A CN107147552A (en) 2017-09-08
CN107147552B true CN107147552B (en) 2020-08-07

Family

ID=58805666

Family Applications (2)

Application Number Title Priority Date Filing Date
CN201611008387.0A Pending CN106656704A (en) 2016-11-16 2016-11-16 Modbus protocol remote control result feedback information reading method and device
CN201710283963.0A Active CN107147552B (en) 2016-11-16 2017-04-26 Method and device for remotely controlling return letter reading

Family Applications Before (1)

Application Number Title Priority Date Filing Date
CN201611008387.0A Pending CN106656704A (en) 2016-11-16 2016-11-16 Modbus protocol remote control result feedback information reading method and device

Country Status (1)

Country Link
CN (2) CN106656704A (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111130970A (en) * 2019-12-31 2020-05-08 深圳市无眼界科技有限公司 Communication method based on modbus communication protocol
CN112261512B (en) * 2020-12-07 2021-03-12 北京和利时系统工程有限公司 Master station remote control method, device, storage medium and equipment of unbalanced polling protocol

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102324793A (en) * 2011-10-11 2012-01-18 航天科工深圳（集团）有限公司 Method and system for realizing a plurality of virtual power distribution terminals
CN104392102A (en) * 2014-01-08 2015-03-04 国家电网公司 Automatic extraction and calculation method for online monitoring indexes of relaying protection equipment
CN104991530A (en) * 2015-05-19 2015-10-21 航天科工深圳（集团）有限公司 Communication method based on CAN bus, and power distribution terminal
CN105007209A (en) * 2015-06-04 2015-10-28 烟台东方威思顿电气股份有限公司 RS485-based polling communication method
CN105958642A (en) * 2016-05-20 2016-09-21 中山市厚源电子科技有限公司 Transformer substation automatic system real-time simulation device and test system thereof

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9201527B2 (en) * 2008-04-04 2015-12-01 Microsoft Technology Licensing, Llc Techniques to remotely manage a multimedia conference event
CN102163371A (en) * 2011-04-12 2011-08-24 丽水市海威光控科技有限公司 System and method for remotely controlling tunnel indicator boards
CN103513962B (en) * 2012-06-29 2016-01-27 上海宝信软件股份有限公司 Based on the Power SCADA concurrency control method of minicomputer
CN104486188B (en) * 2014-11-18 2018-04-27 深圳达实智能股份有限公司 A kind of method to set up and device for receiving and dispatching separate threads

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102324793A (en) * 2011-10-11 2012-01-18 航天科工深圳（集团）有限公司 Method and system for realizing a plurality of virtual power distribution terminals
CN104392102A (en) * 2014-01-08 2015-03-04 国家电网公司 Automatic extraction and calculation method for online monitoring indexes of relaying protection equipment
CN104991530A (en) * 2015-05-19 2015-10-21 航天科工深圳（集团）有限公司 Communication method based on CAN bus, and power distribution terminal
CN105007209A (en) * 2015-06-04 2015-10-28 烟台东方威思顿电气股份有限公司 RS485-based polling communication method
CN105958642A (en) * 2016-05-20 2016-09-21 中山市厚源电子科技有限公司 Transformer substation automatic system real-time simulation device and test system thereof

Also Published As

Publication number Publication date
CN107147552A (en) 2017-09-08
CN106656704A (en) 2017-05-10

Similar Documents

Publication Publication Date Title
US20220174781A1 (en) Drx configuration method for sidelink and device
EP3920447A1 (en) Method and apparatus for receiving target downlink signal, and device and system
EP3823195B1 (en) Data transmission method and apparatus
EP3537840A1 (en) Data transmission method, terminal and network-side device
EP3739992A1 (en) Information processing method, device, and apparatus
CN107147552B (en) Method and device for remotely controlling return letter reading
CN102693142A (en) Network adaptation method and device
CN107947906B (en) Slave device
EP3664521A1 (en) Rar interception method, sending method, related device and system
CN110830579A (en) Equipment state display method, system, device and computer storage medium
US11246065B2 (en) Method, apparatus, terminal and storage medium for measurement report
CN114585059A (en) Terminal idle state processing method and device, terminal and equipment
CN112261512B (en) Master station remote control method, device, storage medium and equipment of unbalanced polling protocol
CN111107041B (en) Method and device for preventing intelligent household appliance from being maliciously controlled
CN109800201B (en) Driving method for RS485 real-time receiving and transmitting control based on linux
CN103327125A (en) Code remote upgrading system and file transmission method thereof
CN107171915B (en) Communication protocol changing method and device
EP4210402A1 (en) Data communication method and related apparatus
CN108667682B (en) Connection synchronization method, device and medium based on secure gateway deep packet detection
CN115208794B (en) Timer adjustment method, device, equipment and medium of Profibus-DP protocol
KR102625778B1 (en) ARQ feedback method when ARQ is used in Half duplex mode in Proximity-1 system
CN112714453B (en) Board card mode determining method and device
CN116827932B (en) Multi-server remote control method and device, electronic equipment and storage medium
CN104038309A (en) Simulation system communication method and simulation system
CN113382094B (en) Module address determining method and device, power module and communication network

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20211122

Address after: 100176 room 3412, floor 4, building 3, yard 2, Desheng Middle Road, Beijing Economic and Technological Development Zone, Daxing District, Beijing

Patentee after: Beijing Helishi system integration Co.,Ltd.

Address before: 100176 No.2, Disheng Middle Road, Yizhuang Economic and Technological Development Zone, Daxing District, Beijing

Patentee before: BEIJING HOLLYSYS Co.,Ltd.