CN102739456B - Wired and wireless hot backup redundancy multi-master communication method, and field gateway module - Google Patents

Abstract

The invention discloses a wired and wireless hot backup redundancy multi-master communication method and a field gateway module, wherein corresponding controlled objects are controlled in a field-level wired and wireless mutual backup double-network observe and control network so as to acquire the state of the monitored objects; the wired communication and the wireless communication of a network node module are both on line in the working, all modules in the general network preferably communicate by the wired form; the field gateway module provided by the invention can obtain the state of a field instrument or control a field apparatus in the observe and control field by the node module, and meanwhile, wired and the wireless communication units can achieve the redundancy multi-master communication by proper arithmetic, so as to build a field obverse and control system of double-network redundancy multi-master communication. With the adoption of the method, the reliability of the industrial field monitoring and control system is enhanced, and the method and the module have the advantages that the zero-cost communication is operated without additional redundancy management equipment.

Description

A wired and wireless hot standby redundant multi-master communication method and field gateway module

Technical field

The invention belongs to the field of network communication, especially the technical field of industrial site measurement and control network.

Background technique

1) Fieldbus and its multi-master communication technology

In the field of industrial applications, the field bus control system FCS has matured and gradually replaced the original distributed control system DCS. FCS has the advantages of simple installation, high degree of digitalization, fault diagnosis and protection operation according to default values. It can save costs for users, improve the level of automation and the level of intelligence of the system.

The working mode of the field bus is divided into master-slave mode and multi-master mode. There is only one master in the fieldbus network of the master-slave mode, and the others are all slaves. The slaves cannot communicate with each other, and the slaves only communicate with the master. In the multi-master mode, any network node in the fieldbus can become a master to communicate with other nodes in the network.

Since the field bus mostly adopts a bus structure and is often connected in a daisy chain, if one of the nodes is separated from the bus link, there will be a node communication failure or a disconnection failure, resulting in a high risk of communication reliability. . Therefore, some field buses adopt a ring network structure. When a node is offline, the ring network topology becomes a bus topology, and the host can continue to communicate with non-offline nodes. This is the redundant ring network technology. However, the application of this technology requires a ring network management module, which increases the equipment cost; and the head and tail must be connected, which increases the installation cost.

2) Wireless communication technology

Wireless communication technology and wireless network technology have attracted extensive attention from the industry due to their good mobility, no need for wiring, low power consumption, and adaptive networking, and they are gradually becoming mature. From the original more wireless sensor network applications, it has begun to be applied to the control field. For example, there have been improved PID algorithms suitable for industrial wireless modules and wireless measurement and control networks. The wireless modules developed by Emerson's process management automation department have been successfully used in chemical, cement and other industries. Wireless communication networks often use multi-hop technology to improve communication reliability and environmental adaptability. Many also use the Mesh network model for multi-routing reliable communication. The currently used wireless communication technologies include GPRS communication, WiFi communication and other wireless LAN communication technologies such as ZigBee.

But in general, there is still a certain gap between the wireless communication technology currently used in industry and the wired communication in terms of communication speed, security, and anti-interference ability. In large-scale, especially newly-built industrial networks, wired networks are mostly preferred, and optical fiber is used as the communication medium when the distance is long. Wireless networks often exist as a backup communication network for wired communications.

In the wide area network, there is a dual-network redundancy scheme in which wired and wireless backup each other. The main function is that when one network fails, the router will automatically switch to another network, so as to improve the stability of communication. Such as MOXA's F4X33 series products, its application architecture is shown in Figure 1:

F4X33 series products can support wireless mobile network, ordinary PPPOE mode or wired network with static IP access mode, and support automatic redundant backup function.

The program features are:

1) It belongs to wide area network application.

2) It is managed by a router, that is, it has a dedicated redundant management device.

3) High operating costs. If this solution is used to build a measurement and control platform for the industrial station system, each node in the station needs an IP or a SIM card for mobile communication, otherwise it is necessary to connect many instrument signals to one device, and then connect the The device is connected to the network. In this case, cabling and installation is still required from the point of field instrumentation to the devices connected to the network. In this case, the devices that support redundant communication are not field-level communication modules.

In summary, the shortcoming of prior art can be summarized as:

1) The scope of application is mostly wide area network applications, not suitable for field-level measurement and control networks

2) If it is applied in the industrial field measurement and control network, the operating cost is too high

3) Redundancy management of communication requires a special module, which is not directly connected to the on-site instrument point

4) This kind of redundant network still cannot avoid problems such as cumbersome wiring installation at the measurement and control site.

Contents of the invention

In view of the above shortcomings of the prior art, the object of the present invention is to provide a wired and wireless hot standby redundant multi-master communication method for building a field-level low-cost redundant measurement and control network, and to make it easy to install. advantage.

The object of the present invention is achieved by the following means.

A wired and wireless hot standby redundant multi-master communication method controls the corresponding controlled objects in the field-level dual-network measurement and control network with mutual backup of wired and wireless, and obtains the status of the monitored objects; the wired communication and wireless communication of network node modules The communication is online when it is working, and usually all modules in the network prefer wired communication; and the following steps are used to monitor and control the working status of the network node modules:

1) Fault detection and positioning and communication switching methods:

In the wired communication mode, when a node module sends a query/control command to another node module without reply, or the format of the reply content is incorrect, resend the query/control command; When there is no reply in the format or there is no reply at all, the node module sends diagnostic frames to the left and right neighbor modules of the destination node respectively, and judges and locates the fault according to the reply to the diagnostic frame, as follows:

A) When neither the left neighbor nor the right neighbor module of the destination node responds, the node module considers that it is offline or has a fault, lights its own fault indicator light, and switches to a wireless mode to communicate with the destination node that wants to communicate. Communication to complete this query/control task; at the same time communicate with the gateway wirelessly to inform the gateway that it has a fault, the gateway will set the "node fault flag" in the mapping space of the node address in its internal memory and external memory, and record the fault time. Form the fault record of the node module and report it to the superior system or man-machine interface.

B) When both the left and right neighbor modules of the destination node reply and the reply is correct, it is considered that the destination node module is faulty or the destination node module is disconnected from the bus. The node module that initiates the communication switches to the wireless communication mode to communicate with the destination node module to complete the communication task. At the same time, send a "report frame" to the gateway module to report that the destination node module is faulty, and the gateway will set the "node fault flag" in the mapping space of the node address in its internal memory and external memory, record the fault time, and form the fault of the node module Record and report to the superior system or man-machine interface.

C) When the left neighbor node of the destination node replies correctly and the right neighbor module does not reply or replies incorrectly, it is considered that the node initiating communication is on the left side of the destination node module, and the disconnection fault occurs between the destination node and its right neighbor node. Then the node module that initiates the communication switches to the wireless communication mode to communicate with the destination node module to complete the communication task. At the same time, the "report frame" is sent to the gateway module to report the location of the disconnection fault point, and the gateway will set the "disconnection fault flag" in the mapping space corresponding to the bus line number address in its internal memory and external memory, record the fault time, and form the segment Record the faults of the line and report to the superior system or human-machine interface.

D) When the right neighbor node of the destination node replies correctly but the left neighbor module does not reply or replies incorrectly, it is considered that the node initiating communication is on the right side of the destination node module, and the disconnection fault occurs between the destination node and its left neighbor node. Then the node module that initiates the communication switches to the wireless communication mode to communicate with the destination node module to complete the communication task. At the same time, the "report frame" is sent to the gateway module to report the location of the disconnection fault point, and the gateway will set the "disconnection fault flag" in the mapping space corresponding to the bus line number address in its internal memory and external memory, record the fault time, and form this area Record the faults of the section line and report to the superior system or man-machine interface.

After the gateway module receives the report of the failure of the node module and the disconnection of the line between nodes, it will send a "broadcast frame" to the whole network through wireless communication, and inform all the nodes on the network of the type and location of the failure, so that the nodes on the network can adjust The communication method with the module related to the fault point.

After receiving the "broadcast frame", the network node analyzes the type and location of the fault, and takes corresponding measures to ensure future communication. details as follows:

A) If the node is offline or there is a fault in the wired communication of the node itself, add a "node fault record" in the corresponding address space of the corresponding faulty node in its internal memory and external storage, and then communicate with the faulty node in a wireless manner.

B) If there is a disconnection fault in the line section between nodes, add a "disconnection fault record" in the corresponding address space of the corresponding line fault section of its internal memory and external memory. The nodes on the right side of the fault point communicate wirelessly; if they are on the right side of the fault point, then they communicate with the nodes on the left side of the fault point wirelessly.

2) Method to restore wired communication:

A) Method for restoring wired communication after node troubleshooting

The node module with a wired communication fault continuously monitors its own "troubleshooting flag", when it detects that the fault has been eliminated, it switches to the wired communication mode, and sends a "report frame" that can resume wired communication to the gateway module, the gateway After receiving the report, add a "node troubleshooting record" in the slave address mapping space in the memory and storage, and send a "broadcast frame" to all network nodes. Thereafter the node module reverts to wired communication mode.

B) Method for restoring wired communication after disconnection troubleshooting

When the disconnection fault of the line section is eliminated, the corresponding "disconnection fault troubleshooting button" on the left and right network nodes connected to this section is manually pressed, and the two nodes will send the corresponding "disconnection fault" to the gateway module. Exclude the signal". After the gateway module receives the disconnection troubleshooting signal from the two nodes, it sets the "disconnection troubleshooting flag" at the corresponding section mapping address in its own memory and storage, and at the same time the gateway sends a "broadcast frame" to notify all network node, the network returns to the wired communication state.

The purpose of the present invention is also to provide a field gateway module for realizing the above wired and wireless hot standby redundant multi-master communication method.

Using the above means, the present invention can be conveniently used to build a low-cost redundant measurement and control network at the field level and realize zero-cost communication operation of the measurement and control field. The node itself has a redundant management algorithm, and realizes simple network deployment at the bottom of the industrial measurement and control system, saving installation and commissioning costs.

Description of drawings:

FIG. 1 is a scheme diagram of dual-network redundancy in which wired and wireless backup each other in a wide area network in the prior art.

FIG. 2 is a schematic diagram of the field-level measurement and control network in the multi-master communication mode of the present invention.

Fig. 3 is the working flowchart of the gateway in the multi-master communication mode of the present invention: Fig. 3a is the general execution flow diagram of the gateway module; 3b is the execution flow diagram of the normal task communication between the gateway module and the node module.

Fig. 4 is a flow chart of the network nodes in the multi-master communication mode of the present invention.

Fig. 5 is a schematic diagram of the gateway structure of the present invention.

Fig. 6 is an implementation diagram of the field gateway module of the present invention in which the CAN bus is used for wired communication.

Fig. 7 is a diagram of external relations of the packaged field gateway module according to the embodiment of the present invention.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific implementation.

In the field-level measurement and control network using the multi-master communication mode as shown in Figure 2, the gateway module obtains the status of the monitoring object through the node module in the network, or controls the corresponding controlled object through the network node module. The gateway adopts the flow chart in Figure 3, and the network nodes adopt the work flow of the wired and wireless hot standby communication method described in Figure 4, so as to realize zero-cost multi-master redundant communication at the field level.

1) Fault detection and positioning and communication switching methods:

In the wired communication mode, when a node module sends a query/control command to another node module without reply, or the format of the reply content is incorrect, resend the query/control command; When there is no reply in the format or there is no reply at all, the node module sends diagnostic frames to the left and right neighbor modules of the destination node respectively, and judges and locates the fault according to the reply to the diagnostic frame, as follows:

A) When neither the left neighbor nor the right neighbor module of the destination node responds, the node module considers that it is offline or has a fault, lights its own fault indicator light, and switches to a wireless mode to communicate with the destination node that wants to communicate. Communication to complete this query/control task; at the same time communicate with the gateway wirelessly to inform the gateway that it has a fault, the gateway will set the "node fault flag" in the mapping space of the node address in its internal memory and external memory, and record the fault time. Form the fault record of the node module and report it to the superior system or man-machine interface.

B) When both the left and right neighbor modules of the destination node reply and the reply is correct, it is considered that the destination node module is faulty or the destination node module is disconnected from the bus. The node module that initiates the communication switches to the wireless communication mode to communicate with the destination node module to complete the communication task. At the same time, send a "report frame" to the gateway module to report that the destination node module is faulty, and the gateway will set the "node fault flag" in the mapping space of the node address in its internal memory and external memory, record the fault time, and form the fault of the node module Record and report to the superior system or man-machine interface.

C) When the left neighbor node of the destination node replies correctly and the right neighbor module does not reply or replies incorrectly, it is considered that the node initiating communication is on the left side of the destination node module, and the disconnection fault occurs between the destination node and its right neighbor node. Then the node module that initiates the communication switches to the wireless communication mode to communicate with the destination node module to complete the communication task. At the same time, the "report frame" is sent to the gateway module to report the location of the disconnection fault point, and the gateway will set the "disconnection fault flag" in the mapping space corresponding to the bus line number address in its internal memory and external memory, record the fault time, and form the segment Record the faults of the line and report to the superior system or human-machine interface.

D) When the right neighbor node of the destination node replies correctly but the left neighbor module does not reply or replies incorrectly, it is considered that the node initiating communication is on the right side of the destination node module, and the disconnection fault occurs between the destination node and its left neighbor node. Then the node module that initiates the communication switches to the wireless communication mode to communicate with the destination node module to complete the communication task. At the same time, the "report frame" is sent to the gateway module to report the location of the disconnection fault point, and the gateway will set the "disconnection fault flag" in the mapping space corresponding to the bus line number address in its internal memory and external memory, record the fault time, and form this area Record the faults of the section line and report to the superior system or man-machine interface.

After the gateway module receives the report of the failure of the node module and the disconnection of the line between nodes, it will send a "broadcast frame" to the whole network through wireless communication, and inform all the nodes on the network of the type and location of the failure, so that the nodes on the network can adjust The communication method with the module related to the fault point.

After receiving the "broadcast frame", the network node analyzes the type and location of the fault, and takes corresponding measures to ensure future communication. details as follows:

A) If the node is offline or there is a fault in the wired communication of the node itself, add a "node fault record" in the corresponding address space of the corresponding faulty node in its internal memory and external storage, and then communicate with the faulty node in a wireless manner.

B) If there is a disconnection fault in the line section between nodes, add a "disconnection fault record" in the corresponding address space of the corresponding line fault section of its internal memory and external memory. The nodes on the right side of the fault point communicate wirelessly; if they are on the right side of the fault point, then they communicate with the nodes on the left side of the fault point wirelessly.

2) Method to restore wired communication:

A) Method for restoring wired communication after node troubleshooting

The node module with a wired communication fault continuously monitors its own "troubleshooting flag", when it detects that the fault has been eliminated, it switches to the wired communication mode, and sends a "report frame" that can resume wired communication to the gateway module, the gateway After receiving the report, add a "node troubleshooting record" in the slave address mapping space in the memory and storage, and send a "broadcast frame" to all network nodes. Thereafter the node module reverts to wired communication mode.

B) Method for restoring wired communication after disconnection troubleshooting

When the disconnection fault of the line section is eliminated, the corresponding "disconnection fault troubleshooting button" on the left and right network nodes connected to this section is manually pressed, and the two nodes will send the corresponding "disconnection fault" to the gateway module. Exclude the signal". After the gateway module receives the disconnection troubleshooting signal from the two nodes, it sets the "disconnection troubleshooting flag" at the corresponding section mapping address in its own memory and storage, and at the same time the gateway sends a "broadcast frame" to notify all network node, the network returns to the wired communication state.

3) Gateway module

The gateway module in the system is a special node module that can communicate with the human-computer interaction interface. The realization of the gateway module can adopt a variety of embedded platforms, such as using ARM, DSP, MSP430 or 51 single-chip microcomputer as a microcontroller, and then equipped with a peripheral communication management unit and communication interface. Or the gateway is an industrial PC with corresponding communication boards. The general gateway module has higher computing speed and stronger communication management ability than other node modules on site, and is responsible for the data interaction function of the entire networked on-site measurement and control system and human-machine interface.

The wired communication unit adopts some kind of industrial field bus, such as CAN bus, PROFIBUS bus and so on. The wireless communication unit can adopt ZigBee technology, nRF wireless communication technology and so on. The communication unit of the gateway module is matched with other nodes. There are many ways to communicate between the gateway module and the human-machine interface (HMI) equipment, such as using wired RS232, RS485, or some kind of field bus, Ethernet, etc., or using wireless communication technologies such as GPRS, WiFi, etc.

The structure of the entire gateway module can be shown in Figure 5: the gateway is an intermediate device that connects the upper computer HMI device and the slave. Its structure and working process are illustrated as follows.

Assume that the multi-master communication mode of the on-site measurement and control network is CAN bus (wired mode) and ZigBee (wireless mode) hot standby redundancy, and the communication mode between the gateway and the upper computer HMI device is RS485Modbus. In the figure, the wired bus communication interface and the management unit of the gateway are respectively the transceiver and the controller of the CAN bus. The wireless interface and management unit are ZigBee's transceiver antenna and communication management controller. The communication interface with the upper computer HMI is the RS485 communication interface circuit.

Its working process is: under normal circumstances, the field network node modules, network nodes and gateways communicate through the CAN bus. For example, the gateway receives and sends data through the CAN transceiver, and the detailed process of sending and receiving is controlled by its controller. Such as communication error detection and so on. When the gateway module learns that a certain node in the on-site measurement and control network or a certain section in the line has a communication fault according to the aforementioned "communication fault detection and location method", it records the fault into the memory and storage to form a "communication fault record"; And use the "communication redundancy switching method" system to switch to wireless mode for communication; fault records will also be reported to the host computer system or human-computer interaction interface. When it is known that the fault has been eliminated according to the aforementioned "communication recovery method after troubleshooting", the gateway module records the fault into the memory and storage to form a "communication troubleshooting record"; the system returns to the wired communication state; and notifies the host computer system or human-computer interface. The power supply of the gateway module is solved by the power supply unit. When data storage is required, the memory is responsible.

The realization of a gateway module is shown in Figure 6, and the specific description is as follows:

The entire gateway module is powered by 24VDC, because the on-site instruments or actuators generally use 24VDC power supply, such as pressure and temperature transmitters and solenoid valves. At the same time, the backup mode of external power supply and battery power supply is adopted. When the external power supply is disconnected or other circumstances cannot supply power, the battery pack is used for power supply. 24VDC becomes 3.3VDC after being regulated and regulated to supply power to the main control STM32ARM chip, and realize RS485 communication and serial communication (USART) with CC2530 (ZigBee communication module).

The gateway module communicates with the wired CAN network through the CAN interface and transceiver, while the ZigBee wireless module exchanges data with the ZigBee wireless network through the antenna and communication management controller, and performs serial communication with the main control ARM chip through the USART interface.

The gateway module uses another USART interface, which is converted into an RS485 interface through MAX485 to communicate with the HMI device for human-computer interaction.

The external relationship of the encapsulated field gateway module is shown in Figure 7.

The beneficial effects brought by the technical solution of the present invention can be summarized as follows:

1) Together with the field network node module, a field-level dual-network redundant multi-master communication measurement and control system can be constructed. Improve the reliability of industrial site monitoring and control.

2) Zero-cost operation of on-site wired and wireless dual network redundant communication.

3) There is no need for additional redundant communication management equipment, which saves costs and simplifies the redundant communication network structure.

4) Wired communication adopts reliable industrial field bus, general bus structure, and there is only one physical connection cable for the entire field measurement and control system. The installation of the system is simple and fast, with low installation cost and short cycle.

The basic scheme of the present invention can also be made into various changes and equivalent choices in actual implementation, and the specific implementation details of the fault detection method, the redundant communication switching method and the fault recovery method are different.

These optional combinations with conventional techniques are all concrete manifestations of the basic scheme of the present invention in practice.

Claims (5)

1. a wired and wireless hot backup redundancy multi-master communication method, controls corresponding controlled device in two net measurement and control networks of the wired and wireless mutual backup of level at the scene, obtains the state of monitoring target; The wire communication of network node module and radio communication are operationally all online, and all modules in network all prioritizing selection wired mode communicate; And adopt the operating state comprising the following steps mutual monitor and forecast network node module:

1) fault detect location and communication handover method:

Under wire communication mode, when certain node module sends inquiry/control command to another node module without reply, or when reply content form is incorrect, resend inquiry/control command; The reply of correct format or basic without when replying all is can not get when limited number of time repeats to send instruction, this node module then sends diagnosis frame respectively to the left neighbor and right neighbor module of destination node, according to the reply situation to diagnosis frame, fault is judged and locates, specific as follows:

A) when the left neighbor and right neighbor module of destination node is all without reply, this node module is thought self go offline or have fault, light the malfunction indicator lamp of self, and be switched to wireless mode and communicate with the destination node wanting to communicate, complete this inquiry/control task; Wireless mode and gateway communication simultaneously, inform that gateway self has fault, gateway is just within it deposited and is arranged " node failure mark " with the mapping space of this node address in external memory, the record trouble time, form the failure logging of this node module, and report and submit to superior system or man-machine interface;

B) when the left neighbor and right neighbor module of destination node all has reply, and when replying correct, think that destination node module has fault or destination node module to go offline from bus, the node module of initiating communication is switched to communication and destination node module communication, completes communication task; Send " report frame " to gateway module simultaneously, Objective of Report node module has fault, gateway is just within it deposited and is arranged " node failure mark " with the mapping space of this node address in external memory, the record trouble time, form the failure logging of this node module, and report and submit to superior system or man-machine interface;

C) when the left neighbors of destination node is correctly replied, right adjacent module, without reply or when replying incorrect, thinks that the left side of the node of initiating communication in destination node module, disconnection fault occur between destination node to its right neighbors; Then the node module of initiating communication is switched to communication and destination node module communication, completes communication task; Send " report frame " to gateway module simultaneously, report disconnection fault point position, gateway is just deposited the mapping space corresponding with the bus line numbered address in external memory within it and is arranged " disconnection fault mark ", the record trouble time, form the failure logging of this section of circuit, and report and submit to superior system or man-machine interface;

D) when the right neighbors of destination node is correctly replied, left adjacent module, without reply or when replying incorrect, thinks that the node of initiating communication the right in destination node module, disconnection fault occur between destination node to its left neighbors; Then the node module of initiating communication is switched to communication and destination node module communication, completes communication task; Send " report frame " to gateway module simultaneously, report disconnection fault point position, gateway is just deposited the mapping space corresponding with the bus line numbered address in external memory within it and is arranged " disconnection fault mark ", the record trouble time, form the failure logging of this section circuit, and report and submit to superior system or man-machine interface;

After gateway module receives the report of line disconnection failure between node module fault and node, " broadcast frame " is sent by communication to the whole network, by all nodes on fault type and position informing network, so that the communication mode of the knot adjustment on network and fault point correlation module;

After network node receives this " broadcast frame ", analysis of failure type and position, and the communication that the guarantee that takes appropriate measures is later; Specific as follows:

A) node is gone offline or node self wire communication out of order, within it deposit and add " node failure record " with the corresponding failure node corresponding address space of external memory, all wirelessly carry out with the communication of this malfunctioning node thereafter;

B) disconnection fault is occurred to track section between node, within it deposit and add " disconnection fault record " with the respective lines fault section corresponding address space of external memory, if from the left side of fault point, then all wirelessly communicated with the node on the right of this fault point thereafter; If from the right of fault point, then all wirelessly communicated with the node on this left side, fault point thereafter;

2) method of wire communication is recovered:

A) node failure recovers the method for wire communication after getting rid of

The node module with wire communication fault continues to monitor " the node failure eliminating flag bit " of oneself, when monitoring fault and getting rid of, then be switched to wire communication mode, and send can re-start wire communication " report frame " to gateway module, after gateway receives this report, slave addresses mapping space in internal memory and external memory adds " node failure gets rid of record ", and sends " broadcast frame " to whole network nodes; Thereafter this node module just returns to wired communication modes;

B) disconnection fault recovers the method for wire communication after getting rid of

After track section disconnection fault is got rid of, pressed by hand with corresponding " disconnection fault eliminating button " on the network node of two, the left and right that this section connects, two nodes just send corresponding " disconnection fault eliminating signal " to gateway module; After gateway module receives the disconnection fault eliminating signal of two nodes, by " the disconnection fault eliminating flag bit " set at the respective section mapping address place in oneself internal memory and external memory, gateway sends " broadcast frame " and notifies overall network node simultaneously, and network recovery is to wire communication state.

2. the wired and wireless hot backup redundancy multi-master communication method of one according to claim 1, it is characterized in that, described gateway module is within it deposited and is arranged " node failure mark " and " disconnection fault mark " with the network node address mapping space in external memory, the record trouble time, form the failure logging of network node and track section, and failure logging is informed to whole network nodes and report and submit the human-computer interaction interface to master system or site measuring and control system.

3. the wired and wireless hot backup redundancy multi-master communication method of one according to claim 1, it is characterized in that, deposit when to arrange " node failure eliminating flag bit " and " disconnection fault eliminating flag bit " with the mapping space of the slave addresses in external memory within it, record trouble gets rid of the time; When " node failure gets rid of mark " and " disconnection fault gets rid of mark " set, notice overall network node, System recover is to original wire communication.

4. one kind realizes the wired of claim 1 or 2 or 3 method and the on-the-spot gateway module of wireless hot backup redundancy multi-host communication, it is characterized in that, gateway module has microcontroller and the wired bus communication interface that connects with microcontroller and wireless communication interface, and wired bus communications management unit is between wired bus communication interface and microcontroller; Wireless communications management unit is connected between wireless communication interface and microcontroller.

5. the on-the-spot gateway module of wired and wireless hot backup redundancy multi-host communication according to claim 4, it is characterized in that, described microcontroller can adopt one of ARM, DSP, MSP430 or 51 single-chip microcomputers; The wired bus communication interface of gateway and administrative unit can be transceiver and the controller of CAN; Wireless interface and administrative unit can be ZigBee communication antenna and communication manage cortrol device; Gateway module also has memory and power supply unit.