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A current loop communication control and detection circuit

A technology for current loop communication and communication detection, applied in electrical components, digital transmission systems, transmission systems, etc., can solve the problems of complex monitoring operation, high application difficulty and high cost, and achieve complex monitoring operation, simple circuit structure, and cost. low effect

Active Publication Date: 2017-11-24
GD MIDEA AIR-CONDITIONING EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a current loop communication control and detection circuit, which aims to solve the problems of complicated monitoring operation, difficult application and high cost in the prior art

Method used

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  • A current loop communication control and detection circuit
  • A current loop communication control and detection circuit
  • A current loop communication control and detection circuit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] figure 2 An example circuit structure of the current loop communication control and detection circuit provided by the first embodiment of the present invention is shown. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

[0022] The host communication circuit 101 includes:

[0023] The first resistor R1, the second resistor R2, the first capacitor C1, the first optocoupler U1, the third resistor R3, the second capacitor C2, the third capacitor C3, the first diode D1, the fourth resistor R4, the second Diode D2, fifth resistor R5, first NPN transistor Q1, sixth resistor R6, seventh resistor R7, second optocoupler U2, first Zener diode DZ1, eighth resistor R8, fourth capacitor C4, The first electrolytic capacitor E1, the ninth resistor R9, the tenth resistor R10 and the third diode D3;

[0024] The first end of the first resistor R1 is the signal sending end of the host commu...

Embodiment 2

[0040] image 3 An example circuit structure of the current loop communication control and detection circuit provided by the second embodiment of the present invention is shown, wherein the internal structure of the master communication circuit 101 and the slave communication circuit 102 are the same as figure 2 The ones shown are the same, so they will not be described again. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

[0041] The communication data detection circuit 103 includes a second communication detection circuit 1033 and a monitoring processor 1032; the data input end and the data output end of the second communication detection circuit 1033 are respectively connected to the second signal line L2 and the first signal line L1, and the second communication detection circuit The signal receiving terminal and the signal transmitting terminal of the circuit 1033 are respe...

Embodiment 3

[0053] Figure 4 An example circuit structure of the current loop communication control and detection circuit provided by the third embodiment of the present invention is shown, wherein the internal structure of the master communication circuit 101 and the slave communication circuit 102 are the same as figure 2 and image 3 The ones shown are the same, so they will not be described again. For the convenience of description, only the parts related to the embodiment of the present invention are shown, and the details are as follows:

[0054] The communication data detection circuit 103 comprises a first communication detection circuit 1031, a second communication detection circuit 1033 and a monitoring processor 1032; the data input end of the first communication detection circuit 1031 and the data output end of the second communication detection circuit 1033 are connected to the first communication detection circuit 1033 A signal line L1, the data output end of the first com...

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PUM

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Abstract

The invention belongs to the technical field of current loop communication, and provides a current loop communication control and detection circuit. The current loop communication control and detection circuit comprising a host computer communication circuit, a slave computer communication circuit and a communication data detection circuit is adopted. The circuit structure is simple and cost is low, and current loop communication is performed by the host computer communication circuit and the slave computer communication circuit according to control of a host computer processor and a slave computer processor so that communication data receiving and transmission are mutually realized. Besides, communication data are detected by the communication data detection circuit via a first signal wire and a second signal wire which are connected in parallel between the host computer communication circuit and the slave computer communication circuit so that monitoring of the communication data is realized. The whole monitoring operation process is simple and convenient to apply so that problems in the prior art that monitoring operation is complicated, application difficulty is high and cost is high are solved.

Description

technical field [0001] The invention belongs to the technical field of current loop communication, in particular to a current loop communication control and detection circuit. Background technique [0002] At present, the current loop communication circuit is widely used in electronic products or industrial products, mainly for the communication between the master and the slave at a distance, but because the current loop communication data is difficult to monitor, it is difficult for product design, debugging and after-sales service. caused a lot of trouble. In the existing current loop communication monitoring method, the monitor is connected in series in the current loop communication loop, and the monitor detects and turns over the current loop communication data. Although the above-mentioned monitoring method can monitor the current loop communication data, since the monitor needs to perform data detection and turnover, it will lead to complicated monitoring operation, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/26
Inventor 孙铁军王明明韩晓明陈建昌
Owner GD MIDEA AIR-CONDITIONING EQUIP CO LTD