Drive and diagnosis circuit and device for switching of multiple industrial Ethernet in valve terminal

Abstract

The invention discloses a driving and diagnosis circuit for switching multiple industrial Ethernet in a valve terminal, and the circuit comprises an industrial Ethernet communication interface module which is used for receiving data in an industrial Ethernet network; the control processing module is used for converting the differential Ethernet signal into a level signal and analyzing a received data instruction through an industrial Ethernet protocol stack; and the valve terminal driving and diagnosis module comprises an SPI interface, an enabling pin and a diagnosis pin which are connected to the control processing module, and is used for receiving the analyzed industrial Ethernet data instruction, so that a corresponding channel in the valve terminal is opened or closed, and the valve terminal channel is driven and diagnosed. According to the invention, automatic switching among a plurality of industrial Ethernet protocols can be realized, higher compatibility and operation convenience are provided, real-time system state monitoring and fault early warning are provided through an intelligent diagnosis function, and the reliability and efficiency of the system are obviously improved.

Description

Technical Field

[0001] The present invention relates to the technical field of drive and diagnosis circuits, and in particular to a drive and diagnosis circuit and a device for switching various industrial Ethernet networks in a valve island. Background Art

[0002] Industrial Ethernet technology (such as PROFINET, EtherCAT, EtherNet / IP, etc.) is widely used in various types of automation equipment. Due to its high speed and stable characteristics, it can realize data exchange and control signal transmission between devices.

[0003] Valve Terminal is a widely used component in industrial automation, usually used to centrally control the operation of multiple solenoid valves to simplify the wiring and control of complex pneumatic systems. Valve Terminal is used in many industrial fields, including food processing, pharmaceuticals, chemicals, and water treatment.

[0004] The drive part of the valve island is mainly responsible for controlling the opening and closing of each pneumatic valve. Traditional valve islands usually use electromagnetic coils as drive elements to achieve valve operation by controlling the on and off of current. With the increasing demand for industrial automation, modern valve island drive circuits need to not only realize basic valve control functions, but also support more complex functions, such as switching of multiple industrial Ethernet protocols, high-precision control strategies, and real-time status monitoring. The diagnostic function of the valve island usually needs to detect whether the valve island channel is overloaded, overheated, and whether the electromagnetic coil is damaged.

[0005] At present, there are some valve island devices on the market that support multiple industrial Ethernet protocols. For example, Bürkert's Type 8652 AirLINE valve island supports multiple protocols such as PROFINET I / O, EtherNet / IP, Modbus TCP, and EtherCAT. The valve island also has an integrated LCD screen to display valve status, pressure value, switching cycle counter, and diagnostic report, which greatly simplifies system commissioning and maintenance. In addition, the device also supports redundant configuration to ensure that the system can continue to operate when a communication node fails, thereby improving system reliability.

[0006] Existing technical solutions have made great progress in multi-protocol support and system redundancy, but still have the following shortcomings:

[0007] 1. Complexity of protocol switching: Existing equipment requires manual intervention or complex configuration when switching between multiple protocols, which increases the difficulty of operation and the complexity of system integration.

[0008] 2. Insufficient device compatibility: Although some devices support multiple protocols, their performance on certain protocols is poor and cannot fully meet the needs of different application scenarios.

[0009] 3. Limited diagnostic functions: Although some valve islands are equipped with diagnostic functions, the depth and breadth of these functions are insufficient to provide comprehensive system health status monitoring.

[0010] 4. Energy consumption problem: Existing equipment has high energy consumption when switching multiple protocols, which affects the overall efficiency of the system. Summary of the invention

[0011] The purpose of the present invention is to address the deficiencies in the prior art and to provide a technical solution for a driving and diagnostic circuit and device for switching between multiple industrial Ethernet protocols in a valve island. The driving and diagnostic circuit can automatically switch between multiple industrial Ethernet protocols and can be directly used for driving and diagnosing the valve island, thereby solving the above-mentioned problems. The circuit will have higher compatibility and ease of operation, and through intelligent diagnostic functions, it can provide real-time system status monitoring and fault warning, significantly improving the reliability and efficiency of the system.

[0012] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0013] A driving and diagnostic circuit for switching various industrial Ethernet networks in a valve island, characterized in that:

[0014] Industrial Ethernet communication interface module, used to receive data in the industrial Ethernet network and transmit it to the control processing module;

[0015] The control processing module is connected to the industrial Ethernet communication interface module, and is used to convert the differential Ethernet signal into a level signal, and parse the received data instructions through the industrial Ethernet protocol stack, and send the diagnostic information of the valve island to the industrial Ethernet network through the running Ethernet protocol stack;

[0016] The valve island drive and diagnostic module includes an SPI interface, an enable pin and a diagnostic pin connected to the control processing module, and is used to receive industrial Ethernet data instructions after parsing is completed, so as to open or close the corresponding channel in the valve island, thereby realizing the driving and diagnosis of the valve island channel.

[0017] This drive and diagnostic circuit can automatically switch between multiple industrial Ethernet protocols and can be directly used for valve island drive and diagnosis, thus solving the above problems. This circuit will have higher compatibility and ease of operation, and through intelligent diagnostic functions, it can provide real-time system status monitoring and fault warning, significantly improving system reliability and efficiency.

[0018] Furthermore, the industrial Ethernet communication interface module includes a 100M Ethernet interface including two M12 interfaces CN1 and CN2 and a network transformer, which is connected to the industrial Ethernet network through the M12 interface and transmits the received data to the control processing module through the network transformer.

[0019] Furthermore, the signal lines of the SPI interface, the enable pin and the diagnostic pin are connected to the driver chip through the isolation chip U1, and the driver chip is used to open or close the corresponding channel of the valve island.

[0020] Furthermore, the control processing module includes a NetX90 chip, and the NetX90 chip includes a two-channel 100M Ethernet PHY.

[0021] Furthermore, the control processing module includes a flash and a dip switch, the flash is used to store the industrial Ethernet protocol stack, the dip switch is used to determine the protocol to be run, and the corresponding industrial Ethernet protocol is automatically loaded from the flash by identifying the combination of the dip switch.

[0022] Furthermore, the industrial Ethernet protocol stack includes Profinet, EtherCAT, ethernet / IP, CC-Link IEfield Basic, and Open Modbus TCP.

[0023] Furthermore, the NetX90 chip is provided with a pull-down resistor. When the dip switch is disconnected, the voltage detected by the pin of the NetX90 chip is 0V; when the dip switch is connected, the voltage detected by the pin of the NetX90 chip is 3.3V.

[0024] Furthermore, the level state of the DIP switch and the NetX90 chip is combined into a binary number of 000-111.

[0025] Furthermore, it also includes a power supply module, which is connected to the industrial Ethernet communication interface module, the control processing module and the valve island drive and diagnostic module, and is used to supply power to the industrial Ethernet communication interface module, the control processing module and the valve island drive and diagnostic module.

[0026] A driving and diagnostic device, characterized by comprising the driving and diagnostic circuit as described above for switching between multiple industrial Ethernets in a valve island.

[0027] The present invention has the following beneficial effects due to the adoption of the above technical solution:

[0028] The driving and diagnostic circuit of the present invention can automatically switch between multiple industrial Ethernet protocols and can be directly used for driving and diagnosing the valve island, thereby solving the above-mentioned problems. The circuit will have higher compatibility and ease of operation, and through intelligent diagnostic functions, provide real-time system status monitoring and fault warning, significantly improving the reliability and efficiency of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The present invention will be further described below in conjunction with the accompanying drawings:

[0030] Figure 1 A topological structure diagram of a driving and diagnostic circuit and a driving and diagnostic circuit in a device for switching multiple industrial Ethernet networks in a valve island according to the present invention;

[0031] Figure 2 A circuit diagram of the industrial Ethernet communication structure module in the present invention;

[0032] Figure 3 A circuit diagram of the valve island drive and diagnostic module in the present invention;

[0033] Figure 4 A circuit diagram of a control processing module in the present invention;

[0034] Figure 5 is a circuit diagram of a DIP switch in the present invention;

[0035] Figure 6 It is the circuit diagram of SDARM and FLASH in the present invention;

[0036] Figure 7 It is a circuit diagram of the power module in the present invention. DETAILED DESCRIPTION

[0037] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0038] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only embodiments of a part of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0039] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0040] like Figure 1 As shown, the present invention is a driving and diagnostic circuit for switching multiple industrial Ethernets in a valve island, including an industrial Ethernet communication interface module, a control processing module, a valve island driving and diagnostic module and a power supply module. The control processing module is connected to the first interface of the industrial Ethernet communication interface module, the valve island driving and diagnostic module is connected to the third interface of the control processing module, and the power supply module is connected to the second interface of the industrial Ethernet communication interface module, the fourth interface of the control processing module and the fifth interface of the valve island driving and diagnostic module, and is used to supply power to the industrial Ethernet communication interface module, the control processing module and the valve island driving and diagnostic module.

[0041] Power module such as Figure 7 As shown, the power module is responsible for providing the 24V, 5V and 3.3V DC voltages required in the entire circuit and providing power for the drive of the valve island.

[0042] like Figure 2 As shown, the industrial Ethernet communication interface module is used to receive data in the industrial Ethernet network and transmit it to the control processing module.

[0043] The industrial Ethernet communication interface module includes a 100M Ethernet interface with two M12 interfaces CN1 and CN2 and a network transformer. Taking CN1 as an example, it is connected to the industrial Ethernet network through the M12 interface. After receiving data, it is transmitted to the chip P1_RXP and P1_RXN pins of the control processing module through the network transformer T1.

[0044] like Figure 4 As shown, the control processing module is connected to the industrial Ethernet communication interface module, which is used to convert the differential Ethernet signal into a level signal, and parse the received data instructions through the industrial Ethernet protocol stack, and send the diagnostic information of the valve island to the industrial Ethernet network through the running Ethernet protocol stack;

[0045] The control processing module includes a NetX90 chip, which includes a two-channel 100M Ethernet PHY.

[0046] The control processing module includes flash and dip switches, such as Figure 6 As shown, flash is used to store the industrial Ethernet protocol stack, such as Figure 5As shown, the dip switches are used to determine the protocol to be run. By identifying the combination of the dip switches, the corresponding industrial Ethernet protocol is automatically loaded from the flash.

[0047] Industrial Ethernet protocol stacks include Profinet, EtherCAT, ethernet / IP, CC-Link IE fieldBasic, and Open Modbus TCP.

[0048] The NetX90 chip is equipped with a pull-down resistor. When the dip switch is off, the voltage detected by the pin of the NetX90 chip is 0V; when the dip switch is on, the voltage detected by the pin of the NetX90 chip is 3.3V.

[0049] The 12-bit DIP switch connects PIO8 to PIO19 of the NetX90 chip.

[0050] The combination of the level state of the DIP switch and the NetX90 chip is a binary number from 000 to 111, that is, a digital range from 0 to 7.

[0051] When the combination value of the dial code is 0, the control processing module runs the Profinet protocol stack, 1: EtherCAT, 2: Ethernet / IP, 3: CC-Link IE Field Basic, 4: Open Modbus TCP.

[0052] After the circuit is powered on, the control processing module will first initialize the input functions of PIO8~PIO19 and the SPI interface function; then it will read the combination of the DIP switches, read the corresponding Ethernet protocol stack from the flash, initialize the Ethernet function, and connect and communicate with the master device in the Ethernet; then it will receive the Ethernet data packet from the master, and the protocol stack will parse the valve island drive command to be controlled, and then send it to the valve island drive and diagnostic module through the SPI interface, and the diagnostic data will be returned to the control processing module through the SPI interface; finally, the control processing module will send it to the industrial Ethernet through the running protocol stack.

[0053] like Figure 3 As shown, the valve island drive and diagnosis module includes an SPI interface, an enable pin and a diagnosis pin connected to the control processing module. The SPI interface includes a CTEU_CLK pin, a CTEU_Din1 pin, a CTEU_Dout6 pin and a CTEU_Latch pin. The enable pin includes a CTEU_Enable pin. The diagnosis pin includes a CTEU_Fault pin, which is used to receive the industrial Ethernet data instructions after the parsing is completed, so that the corresponding channel in the valve island is opened or closed, thereby realizing the driving and diagnosis of the valve island channel.

[0054] The signal lines of the SPI interface, enable pin and diagnostic pin are connected to the six driver chips DRV8860PWR through the isolation chip U1. The driver chip is used to open or close the corresponding channels of the valve island. The DRV8860PWR driver chip has open circuit and overload diagnosis functions. Diagnostic information such as whether each channel in the valve island is overloaded or open circuited will also be sent to the control processing module through the SPI interface.

[0055] The VDD1 pin of the isolation chip U1 is connected to the 5V voltage and capacitor C280, the GND1 pin of the isolation chip U1 is connected to the other end of the capacitor C280 and grounded; the VDD2 pin of the isolation chip U1 is connected to 5V-VEN and capacitor C279, the GND2 pin of the isolation chip U1 is connected to the other end of the capacitor C279 and connected to 0V-VEN. The VIA pin, VIB pin, VIC pin, VID pin, VOE pin and VOF pin of the isolation chip U1 are connected to pins 1, 2, 3, 4, 5 and 6 of the SPI interface respectively.

[0056] This drive and diagnostic circuit can automatically switch between multiple industrial Ethernet protocols and can be directly used for valve island drive and diagnosis, thus solving the above problems. This circuit will have higher compatibility and ease of operation, and through intelligent diagnostic functions, it can provide real-time system status monitoring and fault warning, significantly improving system reliability and efficiency.

[0057] A driving and diagnostic device comprises the driving and diagnostic circuit as described above for switching multiple industrial Ethernets in a valve island.

[0058] The above are only specific embodiments of the present invention, but the technical features of the present invention are not limited thereto. Any simple changes, equivalent replacements or modifications made based on the present invention to achieve basically the same technical effects are all included in the protection scope of the present invention.

Claims

1. Driving and diagnostic circuit for switching multiple industrial Ethernet in valve island, characterized by: It includes an industrial Ethernet communication interface module, which is used to receive data in the industrial Ethernet network and transmit it to the control processing module; A control processing module, connected to the industrial Ethernet communication interface module, for converting differential Ethernet signals into level signals, parsing received data instructions through the industrial Ethernet protocol stack, and sending the diagnostic information of the valve island to the industrial Ethernet network through the running Ethernet protocol stack; The valve island drive and diagnostic module includes an SPI interface, an enable pin and a diagnostic pin connected to the control processing module, and is used to receive industrial Ethernet data instructions after parsing is completed, so as to open or close the corresponding channel in the valve island, thereby realizing driving and diagnosis of the valve island channel.

2. The driving and diagnostic circuit for switching multiple industrial Ethernet networks in a valve island according to claim 1, characterized in that: The industrial Ethernet communication interface module includes a 100M Ethernet interface including two M12 interfaces CN1 and CN2 and a network transformer. It is connected to the industrial Ethernet network through the M12 interface and transmits the received data to the control processing module through the network transformer.

3. The driving and diagnostic circuit for switching multiple industrial Ethernet networks in a valve island according to claim 1, characterized in that: The signal lines of the SPI interface, the enable pin and the diagnostic pin are connected to the driver chip through the isolation chip U1, and the driver chip is used to open or close the corresponding channel of the valve island.

4. The driving and diagnostic circuit for switching multiple industrial Ethernet networks in a valve island according to claim 1, characterized in that: The control processing module includes a NetX90 chip, and the NetX90 chip includes a two-channel 100M Ethernet PHY.

5. The driving and diagnostic circuit for switching multiple industrial Ethernet networks in a valve island according to claim 4, characterized in that: The control processing module includes a flash and a dip switch, the flash is used to store the industrial Ethernet protocol stack, the dip switch is used to determine the protocol to be run, and the corresponding industrial Ethernet protocol is automatically loaded from the flash by identifying the combination of the dip switch.

6. The driving and diagnostic circuit for switching multiple industrial Ethernet networks in a valve island according to claim 5, characterized in that: The industrial Ethernet protocol stack includes Profinet, EtherCAT, ethernet / IP, CC-Link IE fieldBasic, and Open Modbus TCP.

7. The driving and diagnostic circuit for switching multiple industrial Ethernet networks in a valve island according to claim 5, characterized in that: The NetX90 chip is provided with a pull-down resistor. When the dip switch is turned off, the voltage detected by the pin of the NetX90 chip is 0V; when the dip switch is turned on, the voltage detected by the pin of the NetX90 chip is 3.3V.

8. The driving and diagnostic circuit for switching multiple industrial Ethernet networks in a valve island according to claim 5, characterized in that: The level state combination of the DIP switch and the NetX90 chip is a binary number of 000-111.

9. The driving and diagnostic circuit for switching multiple industrial Ethernet networks in a valve island according to claim 1, characterized in that: It also includes a power supply module, which is connected to the industrial Ethernet communication interface module, the control processing module and the valve island drive and diagnostic module, and is used to supply power to the industrial Ethernet communication interface module, the control processing module and the valve island drive and diagnostic module.

10. A driving and diagnostic device, characterized in that: The invention comprises a driving and diagnostic circuit for switching multiple industrial Ethernet networks in a valve island as claimed in any one of claims 1 to 10.

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