Monitoring data interaction system based on bus structure and response method of monitoring data interaction system in emergency

Abstract

The invention provides a monitoring data interaction system based on a bus structure and a response method thereof in an emergency, the system comprises a main control unit, a centralized control unit CCO, at least one slave system access point STA and at least one slave device, the main control unit is used for preferentially broadcasting an emergency response command frame to the CCO when receiving an emergency scheduling command; the CCO is used for preferentially transmitting the emergency response command frame to the STA when the RS485 interface detects the emergency response command frame; the STA is used for preferentially sending the emergency response command frame to the slave equipment when receiving the emergency response command frame; the slave equipment is used for receiving and responding to the emergency response command frame; and the main control unit is also used for recovering the monitoring data request task. The system provided by the invention can quickly and effectively transmit the emergency dispatching command in emergency, ensures the stable operation of the power system, and improves the emergency processing capability of the power system.

Description

Technical Field

[0001] The present invention relates to the technical field of bus communication, and in particular to a monitoring data interaction system based on a bus structure and a response method thereof in an emergency situation. Background Art

[0002] In existing power systems, especially in the scenario of slave device integration and management, the communication between the master control unit and the slave devices usually requires signal conversion through multiple intermediate devices.

[0003] When the system administrator manually detects an abnormality in the power system, for example, when an abnormality occurs in the power collector, in order to avoid a chain reaction in other collectors, the power system administrator issues a power-off command through the collector's monitoring system. The main control unit receives the power-off command issued by the superior monitoring system to the main control unit, and then queues it for processing according to the bus monitoring data request / reply situation.

[0004] Since slave devices in power systems are usually widely distributed and numerous, in emergency situations, the traditional communication protocol uses a question-and-answer method that limits the ability to quickly respond to commands. When the master control unit receives an emergency dispatch command from the superior, it is difficult to respond in time, which may lead to serious consequences. Summary of the invention

[0005] The present invention provides a monitoring data interaction system based on a bus structure and a response method thereof in an emergency state, which can quickly and effectively transmit emergency dispatching commands in an emergency state, ensure the stable operation of the power system, and improve the emergency processing capability of the power system.

[0006] According to a first aspect of an embodiment of the present invention, a monitoring data interaction system based on a bus structure is provided, the system comprising a main control unit, a centralized control unit CCO, at least one slave system access point STA and at least one slave device,

[0007] The main control unit is used to broadcast an emergency response command frame to the CCO first upon receiving an emergency dispatch command;

[0008] CCO, used to transmit the emergency response command frame to STA first when the RS485 interface detects the emergency response command frame;

[0009] The STA is configured to preferentially send the emergency response command frame to the slave device when receiving the emergency response command frame;

[0010] The slave device is used to receive and respond to the emergency response command frame;

[0011] The main control unit is also used to resume the monitoring data request task.

[0012] In a possible implementation, the main control unit is specifically configured to:

[0013] If a monitoring data request task is in progress, stop sending monitoring request frames;

[0014] The emergency response command frame is broadcasted to the CCO for multiple times continuously until the data amount of the emergency response command frame broadcasted to the CCO exceeds the maximum data amount of the monitoring reply frame of the slave device.

[0015] In a possible implementation, CCO is specifically used to:

[0016] Detect the current state of the power carrier channel between CCO and STA;

[0017] If the power carrier channel is idle, an emergency response command frame is sent to the STA;

[0018] If the power carrier channel is preparing to send a monitoring request frame, the monitoring request frame is discarded and an emergency response command frame is sent to the STA;

[0019] If the power carrier channel is sending a monitoring request frame, stop sending the monitoring request frame and send an emergency response command frame to the STA;

[0020] If the power carrier channel is receiving monitoring reply frames, it stops receiving monitoring reply frames and sends an emergency response command frame to the STA;

[0021] If the power carrier channel receives the monitoring reply frame completely, the monitoring reply frame is discarded and an emergency response command frame is sent to the STA.

[0022] In a possible implementation, the STA is specifically used to:

[0023] Detect the current status of the RS485 channel between the slave device;

[0024] If the RS485 channel is idle, an emergency response command frame is sent to the slave device;

[0025] If the RS485 channel is preparing to send a monitoring request frame, the monitoring request frame is discarded and an emergency response command frame is sent to the slave device;

[0026] If the RS485 channel is sending a monitoring request frame, it will stop sending the monitoring request frame and send an emergency response command frame to the slave device;

[0027] If the RS485 channel is receiving monitoring reply frames, it stops receiving monitoring reply frames and sends an emergency response command frame to the slave device;

[0028] If the RS485 channel has completed receiving the monitoring reply frame, the monitoring reply frame is discarded and an emergency response command frame is sent to the slave device.

[0029] In a possible implementation, the main control unit is further configured to send a monitoring request frame to the CCO under normal circumstances;

[0030] The CCO is further used to transmit the monitoring request frame to the STA;

[0031] The STA is further configured to receive and send the monitoring request frame to the slave device;

[0032] A slave device, configured to send a monitoring reply frame to the STA based on the monitoring request frame;

[0033] The STA is further configured to receive and send the monitoring reply frame to the CCO;

[0034] The CCO is further configured to receive and send the monitoring reply frame to the main control unit.

[0035] According to a second aspect of an embodiment of the present invention, a response method of a monitoring data interaction system based on a bus structure in an emergency is provided, the system includes a main control unit, a centralized control unit CCO, at least one slave system access point STA and at least one slave device, and the response method includes:

[0036] When the main control unit receives an emergency dispatch command, it will first broadcast an emergency response command frame to the CCO;

[0037] When the RS485 interface of CCO detects an emergency response command frame, CCO will preferentially transmit the emergency response command frame to STA;

[0038] When the STA receives an emergency response command frame, it will first send an emergency response command frame to the slave device;

[0039] The slave device receives and responds to the emergency response command frame;

[0040] The main control unit resumes the monitoring data request task.

[0041] In a possible implementation, the emergency response command frame is preferentially broadcast to the CCO, including:

[0042] If a monitoring data request task is in progress, suspend the monitoring data request task;

[0043] The emergency response command frame is broadcasted to the CCO for multiple times continuously until the data amount of the emergency response command frame broadcasted to the CCO exceeds the maximum data amount of the monitoring reply frame of the slave device.

[0044] In a possible implementation, the CCO preferentially transmits an emergency response command frame to the STA, including:

[0045] Detect the current state of the power carrier channel between CCO and STA;

[0046] If the power carrier channel is idle, an emergency response command frame is sent to the STA;

[0047] If the power carrier channel is preparing to send a monitoring request frame, the monitoring request frame is discarded and an emergency response command frame is sent to the STA;

[0048] If the power carrier channel is sending a monitoring request frame, stop sending the monitoring request frame and send an emergency response command frame to the STA;

[0049] If the power carrier channel is receiving monitoring reply frames, it stops receiving monitoring reply frames and sends an emergency response command frame to the STA;

[0050] If the power carrier channel receives the monitoring reply frame completely, the monitoring reply frame is discarded and an emergency response command frame is sent to the STA.

[0051] In a possible implementation, the emergency response command frame is preferentially sent to the slave device, including:

[0052] Detect the current status of the RS485 channel between STA and slave devices;

[0053] If the RS485 channel is idle, an emergency response command frame is sent to the slave device;

[0054] If the RS485 channel is preparing to send a monitoring request frame, the monitoring request frame is discarded and an emergency response command frame is sent to the slave device;

[0055] If the RS485 channel is sending a monitoring request frame, it will stop sending the monitoring request frame and send an emergency response command frame to the slave device;

[0056] If the RS485 channel is receiving monitoring reply frames, it stops receiving monitoring reply frames and sends an emergency response command frame to the slave device;

[0057] If the RS485 channel has completed receiving the monitoring reply frame, the monitoring reply frame is discarded and an emergency response command frame is sent to the slave device.

[0058] In a possible implementation, the method further includes:

[0059] Under normal circumstances, the main control unit sends a monitoring request frame to the CCO;

[0060] The CCO receives and transmits the monitoring request frame to the STA;

[0061] The STA receives and sends the monitoring request frame to the slave device;

[0062] The slave device sends a monitoring reply frame to the STA based on the monitoring request frame;

[0063] The STA receives and sends the monitoring reply frame to the CCO;

[0064] The CCO receives and sends the monitoring reply frame to the main control unit.

[0065] The embodiment of the present invention provides a monitoring data interaction system based on a bus structure and a response method thereof in an emergency. When the main control unit receives an emergency dispatch command, the emergency response command frame is broadcast to the CCO first; when the RS485 interface of the CCO detects the emergency response command frame, the CCO transmits the emergency response command frame to the STA first; when the STA receives the emergency response command frame, the emergency response command frame is sent to the slave device first. The system can timely identify the emergency response command in an emergency, quickly switch the communication mode to give priority to the emergency response command, stop or discard the data of the monitoring data request task of the non-emergency situation to avoid data conflict and loss, quickly and effectively transmit the emergency response command, reduce the communication delay on the power carrier and the RS485 signal communication link, ensure the rapid and accurate dispatch of the slave device, not only improve the communication efficiency and response speed of the power system in an emergency, but also enhance the stability, reliability and emergency handling capability of the system, and provide a strong guarantee for the safe operation of the power system. In addition, the operation process in an emergency is simplified. When the system administrator detects an abnormality in the power system and sends an emergency response command to the main control unit through the monitoring system, the emergency event can be handled conveniently and quickly, and the operability and management efficiency of the system are improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0067] Figure 1 A schematic diagram of the structure of a monitoring data interaction system based on a bus structure provided by an embodiment of the present invention;

[0068] Figure 2 A schematic flow chart of a response method of a bus-structured monitoring data interaction system under normal circumstances provided by an embodiment of the present invention.

[0069] Figure 3 A schematic flow chart of a method for responding to an emergency situation in a monitoring data interaction system based on a bus structure provided by an embodiment of the present invention;

[0070] Figure 4 A flowchart of another bus-structure-based monitoring data interaction system response method in an emergency situation provided by an embodiment of the present invention;

[0071] Figure 5 A flowchart of another bus-structure-based monitoring data interaction system response method in an emergency situation provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0072] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0073] The embodiment of the present invention also provides a monitoring data interaction system based on a bus structure, such as Figure 1 As shown, the system includes a main control unit, a centralized control unit CCO, at least one slave system access point STA and at least one slave device. The main control unit communicates with CCO through an RS485 channel, CCO communicates with STA through a power carrier channel, and STA communicates with the slave device through an RS485 channel.

[0074] Among them, the RS485 channel transmits 485 signals, and the power carrier channel transmits carrier signals.

[0075] Under normal circumstances, the main control unit performs monitoring data request tasks, mainly using a question-and-answer monitoring data interaction mode, such as Figure 2 As shown, the main control unit sends a monitoring request frame to the CCO; the CCO receives and transmits the monitoring request frame to the STA; the STA receives and sends a monitoring request frame to the slave device; the slave device sends a monitoring reply frame to the STA based on the monitoring request frame; the STA receives and sends a monitoring reply frame to the CCO; the CCO receives and sends a monitoring reply frame to the main control unit.

[0076] The embodiment of the present invention also provides a bus-structured monitoring data interaction system in an emergency response method, which is applied to the above-mentioned bus-structured monitoring data interaction system, such as Figure 3 As shown, the method may include the following steps:

[0077] S310, when the main control unit receives the emergency dispatch command, it preferentially broadcasts the emergency response command frame to the CCO.

[0078] After the main control unit receives the emergency dispatch command from the superior, the system immediately enters an emergency state.

[0079] The emergency response command frame includes data related to the emergency dispatch command.

[0080] If the master control unit is performing a monitoring data request task, the monitoring data request task is suspended to avoid continuous occupation of bus resources during the issuance of the emergency response command frame; and the emergency response command frame is immediately broadcast to the CCO for multiple consecutive times until the amount of data of the emergency response command frame broadcast to the CCO exceeds the maximum data amount of the monitoring reply frame of the slave device.

[0081] If the master control unit is idle, it directly broadcasts the emergency response command frame to the CCO for multiple consecutive times until the data amount of the emergency response command frame broadcast to the CCO exceeds the maximum data amount of the monitoring reply frame of the slave device.

[0082] The data amount of the emergency response command frame broadcast to the CCO exceeds the maximum data amount of the monitoring reply frame of the slave device, which can prevent the monitoring reply frame and the emergency response command frame from being stuck together and unrecognizable when they are transmitted on the bus at the same time. The data amount of the emergency response command frame sent exceeds the maximum data amount of the monitoring reply frame. Even if the data are stuck together, the excess data can be identified as valid data.

[0083] S320, when the RS485 interface of the CCO detects an emergency response command frame, the CCO preferentially transmits the emergency response command frame to the STA.

[0084] When the RS485 interface of the CCO detects an emergency response command frame, the CCO detects the current state of the power carrier channel between the CCO and the STA;

[0085] like Figure 4 As shown, if the power carrier channel is idle, an emergency response command frame is immediately sent to the STA.

[0086] If the power carrier channel is about to send a monitoring request frame, the current monitoring request frame is discarded and an emergency response command frame is immediately sent to the STA to ensure the stability and reliability of communication.

[0087] If the power carrier channel is sending a monitoring request frame, it will stop sending the monitoring request frame and immediately send an emergency response command frame to the STA to ensure the stability and reliability of communication.

[0088] If the power carrier channel is receiving monitoring reply frames, in order to avoid data conflict and loss of the RS485 channel, it stops receiving monitoring reply frames and immediately sends emergency response command frames to STA to ensure the priority of the command and the real-time transmission of the emergency response command frames.

[0089] If the power carrier channel has completed receiving the monitoring reply frame, in order to avoid data conflict and loss of the RS485 channel, the current monitoring reply frame will be discarded and an emergency response command frame will be immediately sent to the STA to avoid data conflict and loss and ensure the stability and reliability of communication.

[0090] S330, when the STA receives the emergency response command frame, it preferentially sends the emergency response command frame to the slave device.

[0091] When STA receives the emergency response command frame through the carrier channel between STA and CCO, STA detects the current state of the RS485 channel between STA and the slave device;

[0092] like Figure 5 As shown, if the RS485 channel is idle, an emergency response command frame is sent to the slave device.

[0093] If the RS485 channel is about to send a monitoring request frame, the current monitoring request frame will be discarded and an emergency response command frame will be immediately sent to the slave device to ensure the stability and reliability of communication.

[0094] If the RS485 channel is sending a monitoring request frame, the sending of the monitoring request frame will be suspended, and an emergency response command frame will be immediately sent to the slave device to ensure the stability and reliability of communication.

[0095] If the RS485 channel is receiving a monitoring reply frame, it stops receiving the monitoring reply frame and immediately sends an emergency response command frame to the slave device to ensure the immediate transmission of the emergency response command frame.

[0096] If the RS485 channel has completed receiving the monitoring reply frame, the current monitoring reply frame is discarded, the monitoring reply frame is no longer forwarded to the carrier channel, and an emergency response command frame is immediately sent to the slave device.

[0097] S340, the slave device receives and responds to the emergency response command frame.

[0098] S350, the main control unit resumes the monitoring data request task.

[0099] After the emergency response command frame is broadcast, the emergency situation will be relieved, the system will return to normal, and the main control unit will resume the monitoring data request task.

[0100] The embodiment of the present invention provides a monitoring data interaction system based on a bus structure and a response method thereof in an emergency. When the main control unit receives an emergency dispatch command, the emergency response command frame is broadcast to the CCO first; when the RS485 interface of the CCO detects the emergency response command frame, the CCO transmits the emergency response command frame to the STA first; when the STA receives the emergency response command frame, the emergency response command frame is sent to the slave device first. The system can timely identify the emergency response command in an emergency, quickly switch the communication mode to give priority to the emergency response command, stop or discard the data of the monitoring data request task of the non-emergency situation to avoid data conflict and loss, quickly and effectively transmit the emergency response command, reduce the communication delay on the power carrier and the RS485 signal communication link, ensure the rapid and accurate dispatch of the slave device, not only improve the communication efficiency and response speed of the power system in an emergency, but also enhance the stability, reliability and emergency handling capability of the system, and provide a strong guarantee for the safe operation of the power system. In addition, the operation process in an emergency is simplified. When the system administrator detects an abnormality in the power system and sends an emergency response command to the main control unit through the monitoring system, the emergency event can be handled conveniently and quickly, and the operability and management efficiency of the system are improved.

[0101] For the above-mentioned method embodiments, for the sake of simplicity, they are all described as a series of action combinations, but those skilled in the art should know that the present invention is not limited by the order of the actions described, because according to the present invention, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also know that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the present invention.

[0102] It should be noted that each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the embodiments can be referred to each other. For the device embodiment, since it is basically similar to the method embodiment, the description is relatively simple, and the relevant parts can be referred to the partial description of the method embodiment.

[0103] The steps in the methods of the embodiments of the present invention may be adjusted in order, combined, or deleted according to actual needs, and the technical features recorded in the embodiments may be replaced or combined.

[0104] The modules and sub-modules in the devices and terminals of the various embodiments of the present invention may be combined, divided, or deleted according to actual needs.

[0105] In the several embodiments provided by the present invention, it should be understood that the disclosed terminals, devices and methods can be implemented in other ways. For example, the terminal embodiments described above are only schematic, for example, the division of modules or submodules is only a logical function division, and there may be other division methods in actual implementation, such as multiple submodules or modules can be combined or integrated into another module, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be an indirect coupling or communication connection through some interfaces, devices or modules, which can be electrical, mechanical or other forms.

[0106] The modules or submodules described as separate components may or may not be physically separated, and the components of the modules or submodules may or may not be physical modules or submodules, that is, they may be located in one place, or they may be distributed on multiple network modules or submodules. Some or all of the modules or submodules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0107] In addition, each functional module or submodule in each embodiment of the present invention may be integrated into one processing module, or each module or submodule may exist physically separately, or two or more modules or submodules may be integrated into one module. The above-mentioned integrated modules or submodules may be implemented in the form of hardware or in the form of software functional modules or submodules.

[0108] Professionals may further appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in the above description according to function. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professionals and technicians may use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0109] The steps of the method or algorithm described in conjunction with the embodiments disclosed herein may be implemented directly by hardware, software units executed by a processor, or a combination of the two. The software units may be placed in a random access memory (RAM), a memory, a read-only memory (ROM), an electrically programmable ROM, an electrically erasable programmable ROM, a register, a hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.

[0110] Finally, it should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0111] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A monitoring data interaction system based on a bus structure, the system comprising a main control unit, a centralized control unit CCO, at least one slave system access point STA and at least one slave device, characterized in that: The main control unit is used to preferentially broadcast an emergency response command frame to the CCO upon receiving an emergency dispatch command; The CCO is used to preferentially transmit the emergency response command frame to the STA when the RS485 interface detects the emergency response command frame; The STA is configured to preferentially send the emergency response command frame to the slave device when receiving the emergency response command frame; The slave device is used to receive and respond to the emergency response command frame; The main control unit is also used to resume the monitoring data request task.

2. The system according to claim 1, characterized in that The main control unit is specifically used for: If a monitoring data request task is in progress, stop sending monitoring request frames; The emergency response command frame is broadcasted to the CCO for multiple times continuously until the data amount of the emergency response command frame broadcasted to the CCO exceeds the maximum data amount of the monitoring reply frame of the slave device.

3. The system according to claim 1, characterized in that The CCO is specifically used for: Detecting the current state of the power carrier channel between the CCO and the STA; If the power carrier channel is idle, the emergency response command frame is sent to the STA; If the power carrier channel is preparing to send a monitoring request frame, the monitoring request frame is discarded and the emergency response command frame is sent to the STA; If the power carrier channel is sending a monitoring request frame, suspend sending the monitoring request frame and send the emergency response command frame to the STA; If the power carrier channel is receiving a monitoring reply frame, stop receiving the monitoring reply frame and send the emergency response command frame to the STA; If the power carrier channel completes receiving the monitoring reply frame, the monitoring reply frame is discarded and the emergency response command frame is sent to the STA.

4. The system according to claim 1, characterized in that The STA is specifically used for: Detect the current status of the RS485 channel between the slave device; If the RS485 channel is idle, the emergency response command frame is sent to the slave device; If the RS485 channel is about to send a monitoring request frame, the monitoring request frame is discarded and the emergency response command frame is sent to the slave device; If the RS485 channel is sending a monitoring request frame, the sending of the monitoring request frame is suspended, and the emergency response command frame is sent to the slave device; If the RS485 channel is receiving a monitoring reply frame, stop receiving the monitoring reply frame and send the emergency response command frame to the slave device; If the RS485 channel has completed receiving the monitoring reply frame, the monitoring reply frame is discarded and the emergency response command frame is sent to the slave device.

5. The system according to claim 1, characterized in that The main control unit is further used to send a monitoring request frame to the CCO under normal circumstances; The CCO is further used to transmit the monitoring request frame to the STA; The STA is further configured to receive and send the monitoring request frame to the slave device; A slave device, configured to send a monitoring reply frame to the STA based on the monitoring request frame; The STA is further configured to receive and send the monitoring reply frame to the CCO; The CCO is further configured to receive and send the monitoring reply frame to the main control unit.

6. A method for responding to an emergency situation of a monitoring data interaction system based on a bus structure, the system comprising a main control unit, a centralized control unit CCO, at least one slave system access point STA and at least one slave device, characterized in that: The response method includes: When the main control unit receives an emergency dispatch command, it preferentially broadcasts an emergency response command frame to the CCO; When the RS485 interface of the CCO detects the emergency response command frame, the CCO preferentially transmits the emergency response command frame to the STA; When the STA receives the emergency response command frame, it preferentially sends the emergency response command frame to the slave device; The slave device receives and responds to the emergency response command frame; The main control unit resumes the monitoring data request task.

7. The method according to claim 6, characterized in that The priority broadcasting of the emergency response command frame to the CCO includes: If a monitoring data request task is in progress, suspend the monitoring data request task; The emergency response command frame is broadcasted to the CCO for multiple times continuously until the data amount of the emergency response command frame broadcasted to the CCO exceeds the maximum data amount of the monitoring reply frame of the slave device.

8. The method according to claim 6, characterized in that The CCO preferentially transmits the emergency response command frame to the STA, including: Detect the current state of the power carrier channel between CCO and STA; If the power carrier channel is idle, the emergency response command frame is sent to the STA; If the power carrier channel is preparing to send a monitoring request frame, the monitoring request frame is discarded and the emergency response command frame is sent to the STA; If the power carrier channel is sending a monitoring request frame, stop sending the monitoring request frame and send an emergency response command frame to the STA; If the power carrier channel is receiving a monitoring reply frame, stop receiving the monitoring reply frame and send an emergency response command frame to the STA; If the power carrier channel receives the monitoring reply frame completely, the monitoring reply frame is discarded and an emergency response command frame is sent to the STA.

9. The method according to claim 6, characterized in that The STA preferentially sends the emergency response command frame to the slave device, including: STA detects the current status of the RS485 channel between the slave device; If the RS485 channel is idle, the emergency response command frame is sent to the slave device; If the RS485 channel is about to send a monitoring request frame, the monitoring request frame is discarded and the emergency response command frame is sent to the slave device; If the RS485 channel is sending a monitoring request frame, the sending of the monitoring request frame is suspended, and the emergency response command frame is sent to the slave device; If the RS485 channel is receiving a monitoring reply frame, stop receiving the monitoring reply frame and send the emergency response command frame to the slave device; If the RS485 channel has completed receiving the monitoring reply frame, the monitoring reply frame is discarded and the emergency response command frame is sent to the slave device.

10. The method according to claim 6, characterized in that The method further comprises: Under normal circumstances, the main control unit sends a monitoring request frame to the CCO; The CCO receives and transmits the monitoring request frame to the STA; The STA receives and sends the monitoring request frame to the slave device; The slave device sends a monitoring reply frame to the STA based on the monitoring request frame; The STA receives and sends the monitoring reply frame to the CCO; The CCO receives and sends the monitoring reply frame to the main control unit.

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