Ethernet automatic addressing method of hydraulic support electro-hydraulic control system

Abstract

The invention provides an Ethernet automatic addressing method of a hydraulic support electrohydraulic control system, and belongs to the technical field of hydraulic support electrohydraulic control. The defect that a hand-in-hand addressing mode cannot be used for automatic addressing of the Ethernet is overcome; according to the automatic addressing method for the Ethernet electro-hydraulic control system, controllers are connected to a left port and a right port of a comprehensive access switch respectively, the controllers are defined as outer side controllers, middle controllers and inner side controllers, the controllers are recognized from the left side and the right side of the comprehensive access switch respectively according to the definition, and then addressing is conducted from inside to outside, so that the automatic addressing method for the Ethernet electro-hydraulic control system is achieved. Manual setting one by one is not needed, the installation workload is reduced, and the addressing error probability is reduced.

Description

Technical Field

[0001] The invention provides an Ethernet automatic addressing method for an electro-hydraulic control system of a hydraulic support, belonging to the technical field of electro-hydraulic control of a hydraulic support. Background Art

[0002] The current hydraulic support electro-hydraulic control system uses multi-core cables to connect the controllers hand in hand into a network. As the data bandwidth in the network continues to grow, 100M and 1000M Ethernet have replaced the traditional CAN bus and RS485 bus. The physical connection of Ethernet and the traditional CAN bus and RS485 bus network is essentially different. The hand-in-hand addressing method cannot be applied to Ethernet. Therefore, it is necessary to develop an automatic addressing method for electro-hydraulic control systems based on Ethernet. Summary of the invention

[0003] In order to solve the above technical problems, the present invention proposes an Ethernet automatic addressing method for an electro-hydraulic control system of a hydraulic support, which does not require manual setting one by one, reduces the installation workload, and reduces the probability of addressing errors.

[0004] The technical solution adopted by the present invention is: an Ethernet automatic addressing method for an electro-hydraulic control system of a hydraulic support, the electro-hydraulic control system of the hydraulic support includes an electro-hydraulic control server and multiple integrated access switches, the electro-hydraulic control server controls all the integrated access switches, two integrated access switches are connected by optical fiber, each integrated access switch is connected to multiple controllers, each controller is provided with a processor and a switch, the controllers are distributedly connected to the left port and the right port of the integrated access switch through Ethernet cables according to the set quantity, and multiple controllers on the same side are connected in series and then connected to the integrated access switch, the controller with only one end connected to the cable is defined as the outer controller, the controller with both ends connected to the cable is defined as the middle controller, and the controller with one end connected to the integrated access switch is defined as the inner controller, the automatic addressing function is started from the electro-hydraulic control server, and then the electro-hydraulic control server starts to issue control commands in sequence from near to far, and the specific addressing steps are as follows: S1: The electro-hydraulic control server sends a command to shut down the right port of the integrated access switch n; S2: The electro-hydraulic control server sends a sub-addressing command, which contains the sequence number of the integrated access switch. After receiving the command, multiple controllers enter the automatic addressing mode; S3: Automatic addressing method on the left: The statistical command is sent from the outer controller connected to the left port of the integrated switch n. The switch of the adjacent frame controller intercepts the above command and forwards it to the processor for processing to identify the type of the controller. Then, all the controllers on the left are traversed according to the above process to identify the inner controller, the middle controller, and the outer controller. The numbering starts from the inner controller, and the right port of the switch of the inner controller is closed. Then, the adjacent frame controller numbering command is created and sent until the outer controller is numbered and the automatic addressing is completed. The outer controller sends an automatic coding completion command to the electro-hydraulic control server. S4: Automatic addressing method on the right: The automatic addressing method on the right side is the same as the automatic addressing method on the left side. It starts with sending a statistical command from the outer controller connected to the right port of the integrated switch n, traverses all the controllers on the right side, identifies the inner controller, the middle controller, and the outer controller, starts numbering from the inner controller, and closes the left port of the switch of the inner controller. Then, a neighboring controller numbering command is created and sent until the outer controller is numbered and the automatic addressing is completed. The outer controller sends an automatic coding completion command to the electro-hydraulic control server. S5: The electro-hydraulic control server receives the automatic addressing completion command sent by the two outer controllers, confirms that the addressing of the controller connected to the integrated access switch n is completed, and issues a command to open the right port of the switch; S6: Repeat the process from S1 to S5 to complete the automatic addressing of the entire electro-hydraulic control system.

[0005] The IP address of the electro-hydraulic control server is fixed, the number of integrated access switches is known, the IP address of the integrated access switch is known, the installation sequence number is known, all controllers have the same factory IP address, the total number of controllers is known, and the IGMP snooping function is enabled on the integrated access switch and the controller before automatic addressing.

[0006] Each integrated access switch is connected to 6 controllers, namely controllers m1-m3 connected to the left port of the integrated access switch, controllers m4-m6 connected to the right port of the integrated switch, and the outer controllers are defined as controllers m1 and m6.

[0007] When the integrated access switch is connected to 6 controllers, step S3 is as follows: S3.1: In this state, the outer controller m1 starts to send statistics commands. The command area contains: (1) the number of controllers connected to the outer side of controller m1 is 0, (2) the network identifier of the left controller is 1. The command sent by controller m1 is intercepted by the switch of controller m2 and forwarded to its processor; S3.2: Controller m2 processes the statistics command sent by controller m1. Controller m2 first sends a response command and then sends a statistics command. The command area contains: (1) the number of controllers connected to the outside of controller m2 is 1, (2) the network identifier of the left controller is 1. The command sent by controller m2 will be intercepted by the switches of controller m1 and controller m3 and forwarded to their corresponding processors. S3.3: Controller m3 processes the statistics command sent by controller m2, and then controller m3 sends a response command first, and then sends a statistics command. The command area contains the number of controllers connected to the outside of controller m3, which is 2. The command sent by controller m3 is intercepted by the switches of controller m2 and integrated access switch n and forwarded to the processors corresponding to controller m2 and integrated access switch n respectively. S3.4: The integrated access switch n will not send a response command. The controller m3 is identified as the inner controller. According to the sequence number of the integrated access switch n, the controller number is changed to 6(n-1)+3, and then the right port of its switch is closed. A set number command is sent. The command area contains the number of the neighboring frame controller 6(n-1)+2. The switch of controller m2 intercepts the command, changes the number of the controller of this frame to 6(n-1)+2, and responds to controller m3. Controller m3 opens the right port. Similarly, controller m2 closes the right port of its switch and sends a set number command. The command area contains the number of the neighboring frame controller 6(n-1)+1. The switch of controller m1 intercepts the command, changes the number of the controller of this frame to 6(n-1)+1, and responds to controller m2. Controller m2 opens the right port. Controller m1 has no next level, and the automatic addressing is completed. Then controller m1 sends an automatic addressing completion command to the electro-hydraulic control server.

[0008] When the integrated access switch is connected to 6 controllers, step S4 is as follows: S4.1: In this state, only the external controller m6 sends a statistical command. The command area contains: (1) The number of controllers connected to the external side of controller m6 is 0, the network identifier of the right controller is 2, and the command sent by controller m6 is intercepted by the switch of controller m5 and forwarded to its processor; S4.2: Controller m5 processes the statistics command sent by controller m6. Controller m5 first sends a response command and then sends a statistics command. The command area contains: (1) the number of controllers connected to the outside of controller m5 is 1, and (2) the network identifier of the right controller is 2. The command sent by controller m5 is intercepted by the switches of controller m4 and controller m6 and forwarded to their corresponding processors. S4.3: Controller m4 processes the statistics command sent by controller m5, and then controller m4 sends a response command first, and then sends a statistics command. The command area contains the number of controllers connected to the outside of controller m4, which is 2. The command sent by controller m4 is intercepted by the switches of controller m5 and integrated access switch n and forwarded to the processors corresponding to controller m5 and integrated access switch n respectively. S4.4: The integrated access switch n does not send a response command, and the controller m4 is identified as the inner controller. According to the integrated access switch sequence numbering, the controller number is changed to 6(n-1)+4, and then the left port of its switch is closed, and a set number command is sent. The command area contains the neighboring frame controller number 6(n-1)+5. The switch of controller m5 intercepts the command, changes the controller number of this frame to 6(n-1)+5, and responds to controller m4. Controller m4 opens the left port; similarly, controller m5 closes the left port of its switch, and sends a set number command. The command area contains the neighboring frame controller number 6(n-1)+6. The switch of controller m6 intercepts the command, changes the controller number of this frame to 6(n-1)+6, and responds to controller m5. Controller m5 opens the left port; controller m6 has no next level, and the automatic addressing is completed. Then controller m6 sends an automatic addressing completion command to the electro-hydraulic control server.

[0009] When one or two controllers are connected to the integrated access switch, it is defined as an outer controller or an inner controller according to the set rules, and the process of distinguishing the middle controller and / or the outer controller is omitted in the automatic encoding stage.

[0010] The controller and the electro-hydraulic control server communicate using the UDP protocol.

[0011] The beneficial effects of the present invention compared to the prior art are as follows: the Ethernet automatic addressing method of the hydraulic support electro-hydraulic control system provided by the present invention only uses Ethernet, reduces communication cables, improves reliability, reduces costs, and can complete the automatic addressing function. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be further described below in conjunction with the accompanying drawings: Figure 1 A schematic diagram of the connection structure of the electro-hydraulic control system of the hydraulic support in an embodiment of the present invention; Figure 2 This is the workflow diagram of the electro-hydraulic control server; Figure 3 This is the working flow diagram of the external controller; Figure 4 This is the workflow diagram of the intermediate controller; Figure 5 This is the workflow diagram of the inner controller. DETAILED DESCRIPTION

[0013] like Figures 1 to 5 As shown, the present invention provides an Ethernet automatic addressing method for an electro-hydraulic control system of a hydraulic support, which is used in an electro-hydraulic control system of a hydraulic support, wherein the main network of the electro-hydraulic controller is composed of a switch and an optical fiber connection, and each integrated access switch determines the number of controllers connected to it according to the power supply capacity of the set power supply system, and generally adopts a symmetrical distributed connection method, and the left port and the right port of an integrated access switch are respectively connected to at least three controllers. Specifically, according to the number of hydraulic supports set in the mine, the last integrated access switch may also be connected to one or two controllers, and the above situation is also applicable to the addressing method of the present invention.

[0014] The accompanying drawings of the present invention provide a more specific embodiment, in which three controllers are connected to the left and right ports of an integrated access switch, respectively. The controllers are serially connected to the integrated access switch using a mining Ethernet cable, and each controller is provided with a processor and a switch. The integrated access switch is uniformly managed by an electro-hydraulic control server. The logic of automatic addressing of the present invention is described in detail below based on this embodiment.

[0015] like Figure 1 As shown, controllers m1 and m6 (only one end has a mining network cable) are defined as outer controllers, m2 and m5 are middle controllers, and m3 and m4 are inner controllers (one port is connected to the integrated access switch).

[0016] The IP address of the electro-hydraulic control server in the electro-hydraulic control system is fixed, the number of integrated access switches is known, the IP address of the integrated access switch is known, the installation sequence number is known, all controllers have the same factory IP address, and the total number of controllers is known. The IGMP snooping function is enabled on both the integrated access switch and the controller.

[0017] Start the automatic addressing function from the electro-hydraulic control server, and then the electro-hydraulic control server starts to issue control commands in sequence from near to far. The specific addressing steps are as follows: S1: The electro-hydraulic control server sends a command to shut down the right port of the integrated access switch n ( Figure 1 Integrated access switch and switch right ports shown).

[0018] S2: The electro-hydraulic control server sends a sub-addressing command (using the UDP protocol), which contains the sequence number of the integrated access switch. After receiving the command, the six controllers enter the automatic addressing mode. The addressing method is explained separately for the three controllers on the left and the three controllers on the right.

[0019] S3: Automatic addressing method on the left: S3.1: In this state, the external controller m1 starts to send statistics commands (using the custom IGMP protocol). The command area contains: (1) the number of controllers connected to the external side of controller m1 is 0, and (2) the network identifier of the left controller is 1 (the left port is empty). Because of the IGMP snooping function, the commands sent by controller m1 will be intercepted by the switch of the adjacent rack controller (controller m2) and forwarded to the processor.

[0020] S3.2: Controller m2 processes the statistics command sent by controller m1. Controller m2 first sends a response command (using a custom IGMP protocol) and then sends a statistics command (using a custom IGMP protocol). The command area contains: (1) the number of controllers connected to the outside of controller m2 is 1, and (2) the network ID of the left controller is 1. Because IGMP snooping is used, the commands sent by controller m2 will be intercepted by the switches of the neighboring controllers (controllers m1 and m3) and forwarded to the processor.

[0021] S3.3: Controller m3 processes the statistical command sent by controller m2, and then controller m3 first sends a response command (using a custom IGMP protocol), and then sends a statistical command (using a custom IGMP protocol). The command area contains the number of controllers connected to the outside of controller m3, which is 2. Because of the IGMP snooping function, the commands sent by controller m3 will be intercepted by the neighboring frame controller (controller m2) and the integrated access switch n and forwarded to their respective processors.

[0022] S3.4: Integrated access switch n will not send a response command, so controller m3 is identified as an inner controller. According to the sequence number of integrated access switch n, the controller number is changed to 6(n-1)+3, and then the right port of its switch is closed. A set number command is sent (using the custom IGMP protocol). The command area contains the neighboring controller number 6(n-1)+2. Due to the IGMP snooping function, the controller m2 switch intercepts the command, changes the controller number of the rack to 6(n-1)+2, and responds to controller m3. Controller m3 opens the right port. Similarly, controller m2 closes the right port of its switch and sends a set number command (using the custom IGMP protocol). The command area contains the neighboring controller number 6(n-1)+1. Due to the IGMP snooping function, the controller m1 switch intercepts the command, changes the controller number of the rack to 6(n-1)+1, and responds to controller m2. Controller m2 opens the right port. Controller m1 has no next level, and the automatic addressing ends. Then controller m1 sends the automatic addressing completion command to the electro-hydraulic control server (using the UDP protocol).

[0023] S4: Automatic addressing method on the right: S4.1: In this state, only the external controller m6 sends statistical commands (using the custom IGMP protocol). The command area contains: (1) The number of controllers connected to the outside of controller m6 is 0, and the network identifier of the right controller is 2 (the right port is empty). Because of the IGMP snooping function, the commands sent by controller m6 will be intercepted by the switch of the adjacent rack controller (controller m5) and forwarded to the processor.

[0024] S4.2: Controller m5 processes the statistics command sent by controller m6. Controller m5 first sends a response command (using a custom IGMP protocol) and then sends a statistics command (using a custom IGMP protocol). The command area contains: (1) the number of controllers connected to the outside of controller m5 is 1, and (2) the network ID of the right controller is 2. Because IGMP snooping is used, the command sent by controller m5 will be intercepted by the switches of the neighboring controllers (controllers m4 and m6) and forwarded to the processor.

[0025] S4.3: Controller m4 processes the statistical command sent by controller m5, and then controller m4 first sends a response command (using a custom IGMP protocol), and then sends a statistical command (using a custom IGMP protocol). The command area contains the number of controllers connected to the outside of controller m4, which is 2. Because of the IGMP snooping function, the commands sent by controller m4 will be intercepted by the neighboring frame controller (controller m5) and the integrated access switch n and forwarded to their respective processors.

[0026] S4.4: Integrated access switch n will not send a response command, so controller m4 is identified as an inner controller. According to the integrated access switch sequence number, the controller number is changed to 6(n-1)+4, and then the left port of its switch is closed. A set number command is sent (using the custom IGMP protocol). The command area contains the neighboring controller number 6(n-1)+5. Due to the IGMP snooping function, the controller m5 switch intercepts the command, changes the controller number of the rack to 6(n-1)+5, and responds to controller m4. Controller m4 opens the left port. Similarly, controller m5 closes the left port of its switch and sends a set number command (using the custom IGMP protocol). The command area contains the neighboring controller number 6(n-1)+6. Due to the IGMP snooping function, the controller m6 switch intercepts the command, changes the controller number of the rack to 6(n-1)+6, and responds to controller m5. Controller m5 opens the left port. Controller m6 has no next level, and the automatic addressing is completed. Then controller m6 sends the automatic addressing completion command to the server (using the UDP protocol).

[0027] S5: The electro-hydraulic control server receives the automatic addressing completion command (using the UDP protocol) sent by controllers m1 and m6, confirms that the addressing of the controller connected to the integrated access switch n is completed, and issues a command to open the right port of the switch.

[0028] S6: Repeat the process from S1 to S5 to complete the automatic addressing of the entire electro-hydraulic control system.

[0029] In this embodiment, only the automatic addressing process of connecting three controllers to the left and right ports of the integrated access switch is given. When one or two controllers are connected to the left and right ports of the integrated access switch, the logic of the automatic addressing is the same, except that when one controller is connected, the controller is the inner controller, and it is only necessary to determine whether it is the inner controller, and then address it according to the logic. When two controllers are connected, there is no middle controller, and it can be judged and addressed according to normal logic.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An Ethernet automatic addressing method for a hydraulic support electro-hydraulic control system, characterized in that: The hydraulic support electro-hydraulic control system includes an electro-hydraulic control server and multiple integrated access switches. The electro-hydraulic control server controls all integrated access switches. Two integrated access switches are connected by optical fiber. Multiple controllers are connected to each integrated access switch. Each controller is equipped with a processor and a switch. The controllers are distributedly connected to the left port and the right port of the integrated access switch through Ethernet cables according to the set quantity. Multiple controllers on the same side are connected in series and then connected to the integrated access switch. It is defined that the controller with only one end connected to the cable is the outer controller, the controller with both ends connected to the cable is the middle controller, and the controller with one end connected to the integrated access switch is the inner controller. The automatic addressing function is started from the electro-hydraulic control server, and then the electro-hydraulic control server starts to issue control commands in sequence from near to far. The specific addressing steps are as follows: S1: The electro-hydraulic control server sends a command to shut down the right port of the integrated access switch n; S2: The electro-hydraulic control server sends a sub-addressing command, which contains the sequence number of the integrated access switch. After receiving the command, multiple controllers enter the automatic addressing mode; S3: Automatic addressing method on the left: The statistical command is sent from the outer controller connected to the left port of the integrated switch n. The switch of the adjacent frame controller intercepts the above command and forwards it to the processor for processing to identify the type of the controller. Then, all the controllers on the left are traversed according to the above process to identify the inner controller, the middle controller, and the outer controller. The numbering starts from the inner controller, and the right port of the switch of the inner controller is closed. Then, the adjacent frame controller numbering command is created and sent until the outer controller is numbered and the automatic addressing is completed. The outer controller sends an automatic coding completion command to the electro-hydraulic control server. S4: Automatic addressing method on the right: The automatic addressing method on the right side is the same as the automatic addressing method on the left side. It starts with sending a statistical command from the outer controller connected to the right port of the integrated switch n, traverses all the controllers on the right side, identifies the inner controller, the middle controller, and the outer controller, starts numbering from the inner controller, and closes the left port of the switch of the inner controller. Then, a neighboring controller numbering command is created and sent until the outer controller is numbered and the automatic addressing is completed. The outer controller sends an automatic coding completion command to the electro-hydraulic control server. S5: The electro-hydraulic control server receives the automatic addressing completion command sent by the two outer controllers, confirms that the addressing of the controller connected to the integrated access switch n is completed, and issues a command to open the right port of the switch; S6: Repeat the process from S1 to S5 to complete the automatic addressing of the entire electro-hydraulic control system.

2. The Ethernet automatic addressing method of the hydraulic support electro-hydraulic control system according to claim 1 is characterized in that: The IP address of the electro-hydraulic control server is fixed, the number of integrated access switches is known, the IP address of the integrated access switch is known, the installation sequence number is known, all controllers have the same factory IP address, the total number of controllers is known, and the IGMP snooping function is enabled on the integrated access switch and the controller before automatic addressing.

3. The Ethernet automatic addressing method of the hydraulic support electro-hydraulic control system according to claim 2 is characterized in that: Each integrated access switch is connected to 6 controllers, namely controllers m1-m3 connected to the left port of the integrated access switch, controllers m4-m6 connected to the right port of the integrated switch, and the outer controllers are defined as controllers m1 and m6.

4. The Ethernet automatic addressing method of the hydraulic support electro-hydraulic control system according to claim 3 is characterized in that: When the integrated access switch is connected to 6 controllers, step S3 is as follows: S3.1: In this state, the outer controller m1 starts to send statistics commands. The command area contains: (1) the number of controllers connected to the outer side of controller m1 is 0, (2) the network identifier of the left controller is 1. The command sent by controller m1 is intercepted by the switch of controller m2 and forwarded to its processor; S3.2: Controller m2 processes the statistics command sent by controller m1. Controller m2 first sends a response command and then sends a statistics command. The command area contains: (1) the number of controllers connected to the outside of controller m2 is 1, (2) the network identifier of the left controller is 1. The command sent by controller m2 will be intercepted by the switches of controller m1 and controller m3 and forwarded to their corresponding processors. S3.3: Controller m3 processes the statistics command sent by controller m2, and then controller m3 sends a response command first, and then sends a statistics command. The command area contains the number of controllers connected to the outside of controller m3, which is 2. The command sent by controller m3 is intercepted by the switches of controller m2 and integrated access switch n and forwarded to the processors corresponding to controller m2 and integrated access switch n respectively. S3.4: The integrated access switch n will not send a response command. The controller m3 is identified as the inner controller. According to the sequence number of the integrated access switch n, the controller number is changed to 6(n-1)+3, and then the right port of its switch is closed. A set number command is sent. The command area contains the number of the neighboring frame controller 6(n-1)+2. The switch of controller m2 intercepts the command, changes the number of the controller of this frame to 6(n-1)+2, and responds to controller m3. Controller m3 opens the right port. Similarly, controller m2 closes the right port of its switch and sends a set number command. The command area contains the number of the neighboring frame controller 6(n-1)+1. The switch of controller m1 intercepts the command, changes the number of the controller of this frame to 6(n-1)+1, and responds to controller m2. Controller m2 opens the right port. Controller m1 has no next level, and the automatic addressing is completed. Then controller m1 sends an automatic addressing completion command to the electro-hydraulic control server.

5. The Ethernet automatic addressing method of the hydraulic support electro-hydraulic control system according to claim 3 is characterized in that: When the integrated access switch is connected to 6 controllers, step S4 is as follows: S4.1: In this state, only the external controller m6 sends a statistical command. The command area contains: (1) The number of controllers connected to the external side of controller m6 is 0, the network identifier of the right controller is 2, and the command sent by controller m6 is intercepted by the switch of controller m5 and forwarded to its processor; S4.2: Controller m5 processes the statistics command sent by controller m6. Controller m5 first sends a response command and then sends a statistics command. The command area contains: (1) the number of controllers connected to the outside of controller m5 is 1, and (2) the network identifier of the right controller is 2. The command sent by controller m5 is intercepted by the switches of controller m4 and controller m6 and forwarded to their corresponding processors. S4.3: Controller m4 processes the statistics command sent by controller m5, and then controller m4 sends a response command first, and then sends a statistics command. The command area contains the number of controllers connected to the outside of controller m4, which is 2. The command sent by controller m4 is intercepted by the switches of controller m5 and integrated access switch n and forwarded to the processors corresponding to controller m5 and integrated access switch n respectively. S4.4: The integrated access switch n does not send a response command, and the controller m4 is identified as the inner controller. According to the integrated access switch sequence numbering, the controller number is changed to 6(n-1)+4, and then the left port of its switch is closed, and a set number command is sent. The command area contains the neighboring frame controller number 6(n-1)+5. The switch of controller m5 intercepts the command, changes the controller number of this frame to 6(n-1)+5, and responds to controller m4. Controller m4 opens the left port; similarly, controller m5 closes the left port of its switch, and sends a set number command. The command area contains the neighboring frame controller number 6(n-1)+6. The switch of controller m6 intercepts the command, changes the controller number of this frame to 6(n-1)+6, and responds to controller m5. Controller m5 opens the left port; controller m6 has no next level, and the automatic addressing is completed. Then controller m6 sends an automatic addressing completion command to the electro-hydraulic control server.

6. The Ethernet automatic addressing method of the hydraulic support electro-hydraulic control system according to claim 4 or 5 is characterized in that: When one or two controllers are connected to the integrated access switch, it is defined as an outer controller or an inner controller according to the set rules, and the process of distinguishing the middle controller and / or the outer controller is omitted in the automatic encoding stage.

7. The Ethernet automatic addressing method of the hydraulic support electro-hydraulic control system according to claim 6 is characterized in that: The controller and the electro-hydraulic control server communicate using the UDP protocol.

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