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Field bus communication module based on microcontroller

A field bus and communication module technology, applied in the field of bus communication modules, can solve problems such as increasing data transmission time and reducing real-time control, and achieves the effects of good compatibility and flexibility, strong real-time performance and good versatility

Active Publication Date: 2013-09-11
CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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AI Technical Summary

Problems solved by technology

Taking the USB-to-CAN bus communication module as an example, this module requires a USB control device and converts it through a serial protocol, which increases the time for data transmission and reduces the real-time performance of control

Method used

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  • Field bus communication module based on microcontroller
  • Field bus communication module based on microcontroller
  • Field bus communication module based on microcontroller

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Embodiment Construction

[0040] For the sake of reference and clarity, the technical terms, abbreviations or abbreviations used below are recorded as follows:

[0041] DC / DC: Refers to DC to DC power supply. DC / DC conversion is to control the output effective voltage by adjusting the original direct current (PWM) (duty cycle).

[0042] LDO: (Low Dropout Regulator), which means low dropout linear regulator. Linear regulators use transistors or FETs operating in their linear region to subtract excess voltage from the applied input voltage to produce a regulated output voltage.

[0043] TVS: (Transient Voltage Supressor), which means transient voltage suppressor. The TVS tube is a high-efficiency protection device in the form of a diode.

[0044] DPRAM: (Dual Part Memory), which means dual-port memory. DPRAM has two sets of completely independent data lines, address lines and read and write control lines on one SRAM memory, and allows two independent systems to simultaneously access the memory random...

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Abstract

The invention discloses a field bus communication module based on a microcontroller. The field bus communication module based on the microcontroller comprises an application interface module, a data exchange module and a field bus interface module, wherein the application interface module is connected with an external device, the application interface module further comprises a data exchange unit, and the data exchange unit is based on a dual-port RAM (random-access memory) and is subjected to data exchange with the external device and the data exchange module respectively through the dual-port RAM. The data exchange module comprises a processing unit, and the processing unit assesses the dual-port RAM of the data exchange unit in a mode of a built-in local bus interface. The field bus interface module is connected with an external field bus and is used for isolating signal interference between the processing unit of the data exchange module and the external field bus. The field bus communication module based on the microcontroller can be applied to any CAN (Controller Area Network) bus communication occasion, the circuit structure is simple, the communication speed is fast, the real time is strong, the costs are low, the generality is good, and the field bus communication module based on the microcontroller can be accessed to all control systems.

Description

technical field [0001] The invention relates to a bus communication module, in particular to a microcontroller-based field bus communication module applied to industrial automation control. Background technique [0002] At present, field bus communication systems are widely used in the field of industrial control, so a large number of devices need to be connected to the bus system. However, most of the communication modules now use parallel interfaces such as PCI, cPCI / PXI, PC104 / PC104+, PCMCIA, VXI, or serial interfaces, such as RS232, RS485, USB, etc. form of communication gateway. Parallel interfaces such as PCI and PC104, and serial interfaces such as USB and RS485 are widely used as standard industrial buses, but as application interfaces, they must be supported by interface protocol controllers. However, some microcontrollers do not have these control interfaces, and need to complete data exchange through an external control chip. As a result, the complexity of the ...

Claims

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Application Information

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IPC IPC(8): G05B19/042
Inventor 付如愿刘辉荣刘浩平韩志成郑晖王炼王成东
Owner CSR ZHUZHOU ELECTRIC LOCOMOTIVE RES INST
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