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Modbus bus communication digital input and output system and method

A digital input and output, bus communication technology, applied in the direction of electrical digital data processing, instruments, etc., to achieve the effect of reducing wiring harness, increasing reliability and flexibility, and reliable protocol

Pending Publication Date: 2021-03-12
YANFENG VISTEON AUTOMOTIVE ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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  • Modbus bus communication digital input and output system and method
  • Modbus bus communication digital input and output system and method
  • Modbus bus communication digital input and output system and method

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[0032] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0033] Such as Figure 1-3 As shown, the present invention adopts RS485 bus architecture, Modbus communication protocol, and adopts plug-in card expansion to realize the control and reading of external relays and inputs by the computer.

[0034] The purpose of this patent is to solve the difficulties encountered in practical applications. It adopts a plug-in box design, which is flexible and easy to use. It is faster in the layout of the test equipment development process, easier to check the status of ...

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Abstract

The invention provides a Modbus bus communication digital input and output system and method. The Modbus bus communication digital input and output system comprises a plug-in box, a computer, an inputboard, an output board and an RS485 circuit, the RS485 circuit is arranged on an internal bottom plate of the subrack; a Modbus bus is adopted for communication between the computer and the subrack;an internal bottom plate of the subrack is vertically installed on the back of the Modbus bus communication digital input and output system. The plug-in box comprises 14 clamping grooves with 96 pins.By the adoption of the double-clamping-groove design of the plug-in box bottom plate, the problem that an output load needs to be directly connected with a relay is solved, wiring harnesses are reduced, and reliability and flexibility are improved.

Description

technical field [0001] The invention relates to the technical field of bus communication, in particular to a Modbus bus communication digital input and output system and method. Background technique [0002] In the development and application of automotive electronic test equipment, digital input and output (DIO) is widely used. It is a bridge to provide the signal and on-off load required by the product in the process of testing the electrical performance of the product. In general applications, we generally buy general-purpose products on the market. The DIO module may have problems such as complex communication protocols, inconsistency, few hardware interfaces, and difficult layout and expansion. [0003] Patent document CN202203480U discloses a Modbus bus control system for electric actuators, including a main control unit and a motor drive device connected to the main control unit, a knob plate, a torque sensor, a valve position absolute encoder and a display screen, T...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06F13/42G06F13/40
CPCG06F13/4068G06F13/4282G06F2213/0034
Inventor 杨建军季志华
Owner YANFENG VISTEON AUTOMOTIVE ELECTRONICS