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Feed type bus method

A feeding type and bus technology, applied in the field of feeding type bus, can solve the problem of insufficient response of field front-end equipment, and achieve the effects of increasing anti-interference performance, reducing timing error requirements, and increasing response speed.

Inactive Publication Date: 2016-07-27
SHENZHEN TANDA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When there are multiple on-site front-end equipment inspections, the response of the on-site front-end equipment will not be timely enough

Method used

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Examples

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Comparison scheme
Effect test

Embodiment Construction

[0011] The following are preferred specific embodiments of the present invention to further illustrate the content of the present invention. The examples given are only for explaining the present invention, not for limiting the scope of the present invention.

[0012] A kind of feeding type field bus method described in this scheme, described bus method comprises aforementioned part, inspection part and end bit part, and specifically described above-mentioned three parts comprise the following steps:

[0013] A. The aforementioned part is a high level with a level of 24V, and the instruction interval is not less than 3ms wide;

[0014] B, the inspection part includes address instruction, command instruction, operand instruction and BCC instruction, and described address instruction is 8bit address plus 1bit effect; Described command instruction is 8bit command and adds 1bit effect; Described operand instruction is 8bit operand and 1bit parity; the BCC instruction is 8bitBCC p...

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PUM

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Abstract

The invention discloses a feed type bus method, and belongs to the technical field of electronic communication, for the purpose of providing a feed type onsite bus method which has the advantages of reducing onsite construction wiring requirements and improving product anti-interference performance. The bus method comprises a front portion, an inspection portion and an end bit portion. The three portions specifically comprise the following steps: A, the front portion is 24V high level with an instruction interval not smaller than 3ms wide; B, the inspection portion comprises an address instruction, a command instruction, an operand instruction and a BCC instruction, wherein the address instruction is an 8-bit address plus 1-bit verification, the command instruction is an 8-bit command plus 1-bit verification, the operand instruction is an 8-bit operand plus 1-bit verification, and the BCC instruction is an 8-bit BCC plus 1-bit verification; and C, after the inspection portion is sent, high level greater than 600[mu]s is taken as an end bit.

Description

technical field [0001] The invention relates to a bus method, in particular to a feeding bus method. Background technique [0002] In the prior art, the narrowest pulse width of the fieldbus technology is 50 μs, which is easily interfered by field interference signals, causing misjudgment by the controller or front-end equipment. The existing technology adopts a question-and-answer method for on-site front-end equipment inspection. Sending an inspection command can only inspect one front-end device. When there are multiple on-site front-end equipment inspections, the response of the on-site front-end equipment will not be timely enough. Contents of the invention [0003] The purpose of the present invention is to solve the timing sequence of receiving and sending codes of the existing loop bus, comprehensively improve the anti-interference ability of the field bus, and improve the response speed of the controller to the field front-end equipment through the global comman...

Claims

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Application Information

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IPC IPC(8): H04L12/40G05B19/418
CPCY02P90/02H04L12/40G05B19/4185
Inventor 陈宇弘董洋球
Owner SHENZHEN TANDA TECH
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