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Intelligent circuit breaker with protocol conversion module of can and modbus

An intelligent circuit breaker and protocol conversion technology, applied in simulators, instruments, computer control, etc., can solve the problems of few nodes that can be connected to a single bus, poor system real-time performance, and high post-maintenance costs, reducing hardware costs and development. Difficulty, reasonable and simplified structure, stable and reliable performance

Active Publication Date: 2017-03-08
RENMIN ELECTRIC APPLIANCES GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the conversion between Modbus protocol and CAN protocol, because the CAN protocol stipulates that a frame of CAN message only contains 8 bytes of data [38] , but in the field, the amount of data contained in the Modbus protocol is much larger than the data that can be carried by the CAN protocol
[0004] Compared with Can, the Modbus bus itself has many limitations, mainly reflected in low efficiency, poor real-time performance of the system, low reliability of communication, high maintenance cost in the later period, complex network engineering debugging, unsatisfactory transmission distance, single bus can be connected Few connected nodes, inflexible applications, etc.
[0005] However, in the application of industrial field bus, the RS485 used by the Modbus protocol has a slight advantage in hardware cost and development difficulty, and it is still widely used in China, so it is unrealistic to completely abandon the Modbus bus at this stage

Method used

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  • Intelligent circuit breaker with protocol conversion module of can and modbus
  • Intelligent circuit breaker with protocol conversion module of can and modbus
  • Intelligent circuit breaker with protocol conversion module of can and modbus

Examples

Experimental program
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Embodiment 1

[0019] (Embodiment 1, protocol conversion module)

[0020] Figure 1 to Figure 4 A specific implementation of the protocol conversion module in the present invention is shown, wherein figure 1 It is a block diagram of a circuit structure of the protocol conversion module in the present invention, figure 2 Yes figure 1 A schematic circuit diagram of the protocol conversion module shown, image 3 Yes figure 1 The main program flow chart of the protocol conversion module shown, Figure 4 Yes figure 1 The working principle diagram of the protocol conversion module shown.

[0021] This embodiment is a protocol conversion module between Can and Modbus, including an MCU embedded with a CAN controller, an RS485 drive module connected to the MCU, a DC / DC double isolated regulated power supply, an optocoupler, configuration buttons, and a communication indicator light. A CAN drive module connected with an optocoupler and a DC / DC double-isolated regulated power supply, and the DC...

Embodiment 2

[0055] (Embodiment 2, protocol conversion module)

[0056] This embodiment is basically the same as Embodiment 1, except that the indicated indicating unit also includes a liquid crystal display and a debugging button.

Embodiment 3

[0057] (Embodiment 3, intelligent circuit breaker)

[0058] Figure 5 to Figure 7 A specific embodiment of the intelligent circuit breaker in the present invention is shown, wherein Figure 5 It is a schematic diagram of the three-dimensional structure of the first structure of the intelligent circuit breaker in the present invention, Image 6 Yes Figure 5 A schematic diagram of a three-dimensional structure of the protocol conversion module in the smart circuit breaker shown; Figure 7 Yes Image 6 A schematic diagram of the three-dimensional structure of the protocol conversion module shown when viewed from another angle.

[0059] This embodiment is an intelligent molded case circuit breaker made by the above embodiment 2, see Figure 5 to Figure 7 , including a molded case circuit breaker body 1, a remote action actuator (located inside the upper cover, not shown in the figure) and the protocol conversion module 2 described in Embodiment 1; the molded case circuit bre...

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Abstract

The invention discloses a protocol conversion module and an intelligent circuit breaker of a controller area network (Can) and a Modbus. The protocol conversion module comprises a microprogrammed control unit (MCU) center processing unit, a static random access memory (SRAM) storage unit which is connected with the MCU center processing unit, a dial-up switch, a Modbus communication interface, an indicating unit, a PROFIBUS interface chip, an isolated form RS 485 transceiver chip and a Can communication interface, wherein the isolated form RS 485 transceiver chip and the Can communication interface are sequentially connected with the PROFIBUS interface chip. The circuit breaker comprises a plastic shell circuit breaker body, a remote action actuator and the protocol conversion module. According to the protocol conversion module and the intelligent circuit breaker of the Can and the Modbus, a user can monitor and control Modbus equipment through a Can bus in real time.

Description

technical field [0001] The invention belongs to the technical field of intelligent circuit breakers, and in particular relates to an intelligent circuit breaker with a Can and Modbus protocol conversion module. Background technique [0002] Controller Area Network (CAN) is a serial communication network that effectively supports distributed control or real-time control. It is mainly used in data communication in the fields of automobile monitoring, switch control, and manufacturing. CAN is a bus-type serial communication network. Due to the adoption of many new technologies and unique designs, compared with general communication buses, its data communication has outstanding reliability, real-time and flexibility. [35，36] . As one of the most widely used field buses in the world, CAN bus has been widely used in the field of industrial control, and is considered to be one of the most promising field buses. [0003] Compared with the CAN bus, the Modbus bus itself has many li...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05B19/042
Inventor 叶海武李贺明包志舟陈凯佘定辉黄章武
Owner RENMIN ELECTRIC APPLIANCES GROUP