Multiplex collecting port circuit, controller, analog quantity input collection method and system

Abstract

The invention discloses a multiplex collecting port circuit, a controller, an analog quantity input collection method and a system. One end of the multiplex collecting port circuit is connected with an input signal interface; the other end of the multiplex collecting port circuit is connected with the controller; the multiplex collecting port circuit collects one kind of various types of analog quantity input signals corresponding to control signals according to the control signals of the controller. Under the condition of not changing the circuit connection, the same external interface can beused for performing signal collection on an analog quantity sensors of different types. The universality of the controller is improved; the diversified use requirements in the field can be met.

Description

technical field [0001] The invention relates to the field of detection and control of engineering machinery, in particular to a multiplexing acquisition port circuit, a controller, an analog quantity input acquisition method and a system. Background technique [0002] With the rapid development of modern electronic technology, more sensor monitoring units need to be added for data monitoring. [0003] Commonly used analog sensor types include 0-5V voltage type, 4-20mA current type and resistance type. In different control systems, these three types of sensors are almost used at the same time, and the corresponding usage quantities will also vary. The difference is that the analog input of the controller in the prior art scheme adopts two processing schemes: (1) single input mode: only supports one kind of sensor input; (2) manual switching: internally through manual jumper conversion processing , to select different analog sensor requirements. [0004] The solution (1) in ...

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Problems solved by technology

[0004] The solution (1) in the prior art has poor compatibility, which will affect the selection of the controller and cannot satisfy the control input of the complex system; the solution (2) in the prior art requires manual jumper processing, and there will be operation The risk of mistakes leading to wrong measurements, so neither of these two methods can meet the diverse needs of the field

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