Device for expanding number of switching value input points of controller

Abstract

The invention discloses a device for expanding the number of switching value input points of a controller, which is manufactured and connected with diodes which are very common components in the electrical industry to form a diode special array, is matched with a cross switch and a relay to serve as an external circuit to be connected to the input points of the controller, and is matched with a simple program segment in the controller for use. The purpose of expanding the number of digital quantity input points is achieved. According to the invention, the diode is adopted, identification errors cannot occur only in the on state and the off state, and the device is more stable and accurate under the working condition that only one switching value is operated every time.

Description

technical field [0001] The invention relates to the technical field of controllers, in particular to a device for expanding the number of switching value input points of a controller. Background technique [0002] At present, the controllers on the market generally have input and output points such as analog quantities and switching quantities. For a fixed type of controller, the number of input points and output points is fixed. Among them, the switching value is a very commonly used input point. If the number of switching value input points of the controller is not enough due to some special circumstances, the general solution is to add a special digital expansion module that matches the controller model. expand. Although this expansion module is easy to use, it still has the following disadvantages: 1) High cost; 2) It needs to be used with the corresponding type of controller, which has poor versatility, such as Siemens brand controller and Schneider brand controller D...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a single-step manual operation condition (such as the operation of the swing arm of the guardrail cleaning vehicle) to change the shortcomings of the traditional digital quantity expansion module that needs to be matched with the controller, which has poor versatility and high cost. A universal digital expansion device for various brands of controllers, which reduces costs and has the characteristics of common production materials, simple production, and easy supply.

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