Multifunctional communication monitoring module

Abstract

A multifunctional communication monitoring module belongs to the technical field of communication monitoring and comprises a main control circuit module, a first CAN communication circuit module, a second CAN communication circuit module, an RS-485 communication circuit module, a Profibus communication circuit module, an Ethernet circuit module, a fault data storage circuit module and a power supply circuit module. The main control circuit module is connected with the first CAN communication circuit module, the second CAN communication circuit module, the RS-485 communication circuit module, the Profibus communication circuit module, the Ethernet circuit module, the fault data storage circuit module and the power supply circuit module. The communication monitoring module provided by the utility model can meet the requirements of each industrial field in the prior art on the communication monitoring module, can be compatible with three communication protocols, and has the advantages of strong compatibility, stable performance, strong interference seeing capability and low maintenance cost. The problems that an existing industrial-grade communication module is single in function, high in communication failure rate and high in maintenance cost can be solved.

Description

Technical Field

[0001] This utility model belongs to the field of communication monitoring technology, and specifically relates to a multifunctional communication monitoring module. Background Technology

[0002] Industrial communication technology began to emerge in the 1970s, initially primarily using serial communication. Serial communication is relatively simple, sending and receiving bytes bit by bit. It allows sending data on one wire while receiving data on another. It's simple and can achieve long-distance communication. However, this type of communication only enables communication between two devices. With the increase in industrial field devices and data transmission, industrial bus communication emerged. Around 2000, Ethernet communication became the mainstream communication method. Ethernet is currently the most widely used communication protocol standard, defining physical layer connections, electronic signals, and media access protocols. It offers advantages such as plug-and-play functionality, real-time connectivity, high concurrency, and high bandwidth, while also being low-cost and highly resistant to interference. Industrial automation scenarios have evolved from partially using Ethernet technology to now employing a complete Ethernet network solution.

[0003] Many communication modules in the industrial communication field are currently limited in function, and most can only support one communication protocol. They cannot achieve compatibility with mainstream communication protocols such as CAN, RS-485, and Profibus. Moreover, most of these communication modules are outdated, and many of the internal components have been updated or discontinued, resulting in high maintenance costs.

[0004] In view of the current situation in the field of industrial communication, there is an urgent need to develop a multifunctional communication monitoring module that is compatible with multiple communication protocols, has low cost, low maintenance cost, and can realize historical data storage. Utility Model Content

[0005] To address the issues of limited functionality, high failure rate, and high maintenance costs associated with existing industrial-grade communication modules, a multifunctional communication monitoring module, or simply communication module, is proposed. This module is compatible with multiple industrial communication protocols and offers stable performance, low cost, and convenient maintenance, thus overcoming the shortcomings of existing technologies.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A multi-functional communication monitoring module is constructed, comprising seven parts: a main control circuit module, two-channel CAN communication circuits, an RS-485 communication circuit module, a Profibus communication circuit module, a fault data storage circuit module, a power supply circuit module, and an Ethernet circuit module.

[0008] The main control circuit module uses an STM32F407ZGT6 main control chip, powered by a 3.3V supply. Its power supply pins are connected to the 3.3V output of the power supply circuit module. The main control chip's reset pin is connected to the manual reset circuit for manual reset of the communication module. The CAN communication pin defined on the main control chip is connected to the CAN communication pin of the CAN isolation chip IL721, and the other CAN communication circuit is connected in the same way. The RS-485 communication pin defined on the main control chip is connected to the three-channel digital isolator ADUM1301BRWZ. The Profibus communication pin defined on the main control chip is connected to the signal isolation half-duplex transceiver chip ADM2486BRWZ. The pin on the main control chip used for fault data storage is connected to the fault data storage TF card slot. The Ethernet pin on the main control chip is connected to the Ethernet transceiver chip DP83848C (TI).

[0009] The aforementioned dual-channel CAN communication circuit: The CAN communication circuit can support dual-channel CAN communication simultaneously. The CAN communication signal of the external device is connected to the CAN transceiver chip TJA1051 after being filtered by the common-mode inductor through the socket. The communication signal processed by the TJA1051 chip is connected to the CAN isolation chip IL721. The CAN isolation chip IL721 isolates the CAN communication signal and then transmits it to the main chip to realize communication between the external device and the main chip.

[0010] The RS-485 communication circuit module: The 485A and 485B communication signals of the external device are input to the RS-485 transceiver TPT485E-SO1R (3PEAK) chip through the DB9 socket. After processing the communication signals, they are connected to the three-channel digital isolator ADUM1301BRWZ (ADI) to isolate the communication signals before connecting them to the main control chip to realize communication with the external device.

[0011] The Profibus communication circuit module: The Profibus communication signal from the external device is input through the DB9 socket to the signal isolation half-duplex transceiver ADM2486BRWZ (ADI) chip. After isolating the communication signal to be transmitted, it is transmitted to the DP fieldbus communication controller APC3 (Microcyber) chip. The chip converts the signal into 8 communication signals and transmits them to the tri-state output D-type latch 74AHC573 (Nexperia). After controllable processing of the communication signal, it is connected to the main control chip to realize communication between the external device and the main control chip according to the RS-485 communication protocol.

[0012] The Ethernet circuit module: The main chip transmits communication data between the main chip and external devices to the Ethernet transceiver DP83848C (TI). The Ethernet transceiver is then connected to the Ethernet port HR911105A. The Ethernet port is connected to the external terminal device via a network cable. Through dedicated software, the communication data between the devices can be viewed in real time on the external terminal device.

[0013] The aforementioned fault data storage circuit module: A TF card is installed in a TF card slot, which is connected to the main control chip. When the communication module communicates with external devices, the main chip triggers the fault storage function upon receiving a fault signal from the external device. The main chip then transmits the fault data—before the external device malfunctions, during the malfunction, and for a period of time after the malfunction—to the TF memory card and stores the fault data.

[0014] The power supply circuit module is as follows: The main power supply for the communication monitoring module comes from an external 24V switching power supply. The 24V power supply is connected to one VRB2405ZP-6WR3 (MORNSUN) isolated power supply module, which outputs +5V (DC) after isolation. The other 24V power supply is connected to the input terminals of two WRF2405S-3WR2 (MORNSUN) power supply modules, which output two independent +5V (DC) voltages after isolation, without a common ground. An LM1117 power chip is used to convert the +5V (DC) voltage to +3.3V for powering the main chip and related devices. The backup power supply circuit is characterized by the following: When the main power supply is normal, the TP4056 (UWM) charge / discharge management power supply automatically charges the backup battery to full and then automatically stops. When the main power supply fails, the backup battery switches to a discharge state to provide backup power to the main control chip to save current data. Additionally, the PCF8563T (NXP) real-time clock chip in this circuit can record the real-time time at the time of power failure.

[0015] The beneficial effects of this utility model are: This utility model patent can meet the needs of various existing industrial fields for communication monitoring modules. This communication monitoring module is compatible with three communication protocols, has strong compatibility, stable performance, strong interference detection capability, and low maintenance cost. It can solve the problems of existing industrial-grade communication modules having limited functionality, high communication failure rate, and high maintenance cost. Attached Figure Description

[0016] Figure 1 This is the driving principle diagram of the multifunctional communication monitoring module of this utility model;

[0017] Figure 2 This is a schematic diagram of the dual-channel CAN communication circuit module of this utility model;

[0018] Figure 3 This is a schematic diagram of the RS-485 communication circuit module of this utility model;

[0019] Figure 4 This is a schematic diagram of the Profibus communication circuit module of this utility model.

[0020] 1. Main control circuit module; 2. First CAN communication circuit module; 3. Second CAN communication circuit module; 4. RS-485 communication circuit module; 5. Profibus communication circuit module; 6. Ethernet circuit module; 7. Fault data storage circuit module; 8. Power supply circuit module. Detailed Implementation

[0021] A multi-functional communication monitoring module, such as Figure 1 As shown, the system includes a main control circuit module 1, a first CAN communication circuit module 2, a second CAN communication circuit module 3, an RS-485 communication circuit module 4, a Profibus communication circuit module 5, an Ethernet circuit module 6, a fault data storage circuit module 7, and a power supply circuit module 8. The main control circuit module 1 is connected to the first CAN communication circuit module 2, the second CAN communication circuit module 3, the RS-485 communication circuit module 4, the Profibus communication circuit module 5, the Ethernet circuit module 6, the fault data storage circuit module 7, and the power supply circuit module 8.

[0022] The main control chip inside the main control circuit module 1 is an STM32F407ZGT6.

[0023] The first CAN communication circuit module 2 includes a CAN isolation chip IL721 and a CAN transceiver chip TJA1051. The main control chip is sequentially connected to the CAN isolation chip IL721, the CAN transceiver chip TJA1051, the interface socket, and the external device to realize data transmission and reception between the external device and the main control chip.

[0024] The second CAN communication circuit module 3 includes a CAN isolation chip IL721 and a CAN transceiver chip TJA1051. The main control chip is sequentially connected to the CAN isolation chip IL721, the CAN transceiver chip TJA1051, the interface socket, and the external device to realize data transmission and reception between the external device and the main control chip.

[0025] The RS-485 communication circuit module 4 includes a three-channel digital isolator ADUM1301BRWZ and an RS-485 transceiver TPT485E chip. The main control chip is sequentially connected to the three-channel digital isolator ADUM1301BRWZ, the RS-485 transceiver TPT485E chip, the interface socket, and external devices to realize data transmission and reception between external devices and the main control chip.

[0026] The Profibus communication circuit module 5 includes a tri-state output D-type latch 74AHC573, a DP fieldbus communication controller APC3 chip, and a signal isolation half-duplex transceiver ADM2486BRWZ chip. The main control chip is sequentially connected to the tri-state output D-type latch 74AHC573, the DP fieldbus communication controller APC3 chip, the signal isolation half-duplex transceiver ADM2486BRWZ chip, the interface socket, and external devices to realize data transmission and reception between external devices and the main control chip.

[0027] The Ethernet circuit module 6 includes a DP83848C chip and an Ethernet port HR911105A. The main control chip is connected in sequence to the DP83848C chip, the Ethernet port HR911105A, and the terminal device to realize data transmission and reception between the external device and the main control chip.

[0028] The fault data storage circuit module 7 includes a TF memory card, which is installed in a TF card slot and connected to the main control chip.

[0029] This utility model patent can meet the needs of various industrial sectors for communication monitoring modules. The module is compatible with three communication protocols, exhibiting strong compatibility, stable performance, strong interference detection capability, and low maintenance costs. It solves the problems of existing industrial-grade communication modules, such as limited functionality, high communication failure rates, and high maintenance costs.

[0030] Example 2

[0031] like Figure 1 As shown, the present invention mainly consists of seven parts: main control circuit module 1, two-channel CAN communication circuit, RS-485 communication circuit module 4, Profibus communication circuit module 5, fault data storage circuit module 7, power supply circuit module 8, and Ethernet circuit module 6.

[0032] The main control circuit module 1 uses an STM32F407ZGT6 as its internal main control chip. The main control chip is powered by 3.3V, and its power supply pins are connected to the 3.3V output of the power supply circuit module. The reset pin of the main control chip is connected to a manual reset circuit for manual reset of the communication module. The CAN communication pins of the main control chip are connected to the CAN communication pins of the CAN isolation chip IL721 in CAN communication circuit 1. Another set of CAN communication function pins of the main control chip is connected to the CAN communication pins of the CAN isolation chip IL721 in CAN communication circuit 2. The main control chip's RS-485 communication function pins are connected to the ADUM1301BRWZ three-channel digital isolator in the 485 communication circuit 4; the main control chip's Profibus communication function pins are connected to the ADM2486BRWZ signal isolation half-duplex transceiver chip in the Profibus communication circuit module 5; the main control chip's fault data storage pins are connected to the TF card slot in the fault data storage circuit module 7; and the main control chip's Ethernet function pins are connected to the DP83848C (TI) Ethernet transceiver chip in the Ethernet circuit module 6.

[0033] The first CAN communication circuit module 2: as described above Figure 2 As shown, the CAN communication signal from the external device is received through the interface socket J6 of the communication module. After being filtered by capacitors C74 and C75 and common-mode inductor L19, it is connected to the CAN transceiver chip U27-TJA1051. The communication signal processed by the U27-TJA1051 chip is then connected to the CAN isolation chip U28-IL721. The CAN isolation chip U28-IL721 isolates the CAN communication signal (adding a CAN isolation chip can effectively improve communication quality, strengthen the circuit's anti-interference capability, and reduce the risk of communication data loss) before transmitting it to the main control chip, thus realizing data transmission and reception between the external device and the main chip. Additionally, SW1, R108, R109, and C233 at the circuit input are used to adjust the input impedance to ensure impedance matching with the external device.

[0034] The second CAN communication circuit module 3, as described above: Figure 2As shown, the CAN communication signal from the external device is received through the interface socket J7 of the communication module. After being filtered by capacitors C83 and C95 and common-mode inductor L20, it is connected to the CAN transceiver chip U31-TJA1051. The communication signal processed by the U31-TJA1051 chip is then connected to the CAN isolation chip U32-IL721. The CAN isolation chip U32-IL721 isolates the CAN communication signal (adding a CAN isolation chip can effectively improve communication quality, strengthen the circuit's anti-interference capability, and reduce the risk of communication data loss) before transmitting it to the main control chip, thus realizing data transmission and reception between the external device and the main chip. Additionally, SW1, R91, R93, and C234 at the circuit input are used to adjust the input impedance to ensure impedance matching with the external device.

[0035] The RS-485 communication circuit module 4 mentioned above: as Figure 3 As shown, the communication signal from the external device using the RS485 communication protocol is input to the RS-485 transceiver U75-TPT485E chip through interface socket P1 on the communication monitoring module and input resistors R207 and R208. After processing, the communication signal is connected to the three-channel digital isolator U74-ADUM1301BRWZ for isolation (adding a CAN isolation chip effectively improves communication quality, strengthens the circuit's anti-interference capability, and reduces the risk of data loss). The signal then passes through resistors R110, R111, and R211 (resistors are used to ensure impedance matching and improve the circuit's anti-interference capability) before being connected to the main control chip to achieve communication with the external device. Additionally, resistors R265, R266, and R287 at the circuit input are used to adjust the input impedance to ensure impedance matching with the external device.

[0036] The Profibus communication circuit module 5 mentioned above: such as Figure 4As shown, the communication signals from external devices using the Profibus communication protocol are input to the signal isolation half-duplex transceiver chip U80-ADM2486BRWZ via interface socket P2 and resistors R112 and R114 on the communication module. After isolating the communication signals (adding a CAN isolation chip effectively improves communication quality, strengthens the circuit's anti-interference capability, and reduces the risk of data loss), the signals are transmitted via resistors R281 and R286 to the DP fieldbus communication controller U68-APC3 (Microcyber) chip. The chip converts the signals into 8 communication signals, which are then transmitted to the tri-state output D-type latch U69-74AHC573 (Nexperia) chip. After controllable processing of the communication signals, they are connected to the main control chip to enable communication between the external device and the main control chip according to the RS-485 communication protocol. Additionally, resistors R279, R285, and R293 at the circuit input are used to adjust the input impedance to ensure impedance matching with the external device.

[0037] The Ethernet circuit module 6, in order to monitor the communication data between the external device and the communication monitoring module in real time, transmits the communication data between the main control chip and the external device to the Ethernet transceiver DP83848C (TI) chip. The Ethernet transceiver DP83848C (TI) chip is then connected to the Ethernet port HR911105A. The Ethernet port is connected to the external terminal device (PC computer) through a network cable. Through dedicated software, the communication data between the devices can be viewed in real time on the external terminal device, and historical data can also be downloaded.

[0038] The fault data storage circuit module 7 includes a TF memory card installed in a TF card slot, which is connected to the main control chip. When the communication monitoring module communicates with external devices, the main control chip triggers the fault storage function upon receiving a fault report from the monitored external device. The main control chip transmits fault data—before, during, and for a period after the fault occurs—to the TF memory card and stores the fault data. Users can download and retrieve this historical data to quickly determine the cause of the fault and provide timely solutions.

[0039] The power supply circuit module 8 provides power support for the communication monitoring module. The main power supply for the communication monitoring module comes from an external 24V switching power supply. The 24V power supply is connected to one VRB2405ZP-6WR3 isolated power supply module, which outputs +5V after isolation. The other 24V power supply is connected to the input terminals of two WRF2405S-3WR2 power supply modules, which output two independent +5V voltages after isolation, without a common ground. An LM1117 power chip is used to convert the +5V voltage to +3.3V for powering the main control chip and other related equipment. The backup power circuit is characterized in that: when the main power supply is normal, the TP4056 (UWM) charge / discharge management chip automatically charges the backup battery to full and then stops automatically. When the main power supply fails, the backup battery switches to a discharge state to provide backup power to the main control chip to save current data. Additionally, the real-time clock chip PCF8563T (NXP) in this circuit can record the real-time time during power outages.

[0040] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of the present utility model, and these improvements and modifications should also be considered within the protection scope of the present utility model.

Claims

1. A multi-functional communication monitoring module, characterized in that, It includes a main control circuit module (1), a first CAN communication circuit module (2), a second CAN communication circuit module (3), an RS-485 communication circuit module (4), a Profibus communication circuit module (5), an Ethernet circuit module (6), a fault data storage circuit module (7), and a power supply circuit module (8). The main control circuit module (1) is connected to the first CAN communication circuit module (2), the second CAN communication circuit module (3), the RS-485 communication circuit module (4), the Profibus communication circuit module (5), the Ethernet circuit module (6), the fault data storage circuit module (7), and the power supply circuit module (8).

2. The multi-functional communication monitoring module according to claim 1, characterized in that, The main control chip inside the main control circuit module (1) is an STM32F407ZGT6.

3. The multifunctional communication monitoring module according to claim 1, characterized in that, The first CAN communication circuit module (2) includes a CAN isolation chip IL721 and a CAN transceiver chip TJA1051. The main control chip is connected in sequence to the CAN isolation chip IL721, the CAN transceiver chip TJA1051, the interface socket, and the external device to realize data transmission and reception between the external device and the main control chip.

4. The multi-functional communication monitoring module according to claim 1, characterized in that, The second CAN communication circuit module (3) includes a CAN isolation chip IL721 and a CAN transceiver chip TJA1051. The main control chip is connected in sequence to the CAN isolation chip IL721, the CAN transceiver chip TJA1051, the interface socket, and the external device to realize data transmission and reception between the external device and the main control chip.

5. The multifunctional communication monitoring module according to claim 1, characterized in that, The RS-485 communication circuit module (4) includes a three-channel digital isolator ADUM1301BRWZ and an RS-485 transceiver TPT485E chip. The main control chip is connected in sequence to the three-channel digital isolator ADUM1301BRWZ, the RS-485 transceiver TPT485E chip, the interface socket, and external devices to realize data transmission and reception between external devices and the main control chip.

6. The multi-functional communication monitoring module according to claim 1, characterized in that, The Profibus communication circuit module (5) includes a tri-state output D-type latch 74AHC573, a DP fieldbus communication controller APC3 chip, and a signal isolation half-duplex transceiver ADM2486BRWZ chip. The main control chip is connected in sequence to the tri-state output D-type latch 74AHC573, the DP fieldbus communication controller APC3 chip, the signal isolation half-duplex transceiver ADM2486BRWZ chip, the interface socket, and the external device to realize data transmission and reception between the external device and the main control chip.

7. The multifunctional communication monitoring module according to claim 1, characterized in that, The Ethernet circuit module (6) includes a DP83848C chip and an Ethernet port HR911105A. The main control chip is connected to the DP83848C chip, the Ethernet port HR911105A, and the terminal device in sequence to realize data transmission and reception between the external device and the main control chip.

8. The multifunctional communication monitoring module according to claim 1, characterized in that, The fault data storage circuit module (7) includes a TF memory card, which is installed in a TF card slot and connected to the main control chip.

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