Circuit for controlling device switch and control method thereof

Abstract

The invention aims to provide an equipment on-off control circuit which has fewer elements and is low in cost, simple and practical and a control method thereof. The key points of the equipment on-off control circuit are that each set of equipment has a corresponding control switch which is connected with an input end of a processing unit and that a signal of the control switch is output to the corresponding equipment to control the switching of the equipment after being processed by the processing unit. The processing unit receives the signal from the control switch. When the electrical level of the control switch changes, the processing unit sends a control signal to change the on-off state of the equipment. The equipment on-off control circuit and the control method thereof save an input switch and an input module required by the prior circuit on the premise of realizing an equipment control function, use one switch to control the equipment, and reduce hardware investment, thereby reducing hardware cost and installation cost. The circuit and the method are particularly suitable for industries with extremely high requirements on cost and space such as automobile industry.

Description

technical field [0001] The present invention relates to a circuit for controlling a switch of a device and a control method thereof. Background technique [0002] like figure 1 As shown, in the general "start" and "stop" control circuit, the secondary control loop is usually used to control the equipment, that is, the control loop is formed by connecting the start button and the stop button with the processing unit. When the start or stop button is pressed, the button will send a signal to the processing unit to start or stop, and then the processing unit generates and outputs a control signal through the internally set program to control the contactor to be energized or de-energized, thereby turning on or off The power supply of the equipment to achieve the purpose of controlling the switch of the equipment. Although the above-mentioned control circuit and control method are simple in design, they have the following problems: 1. The hardware investment is large, two sets ...

AI Technical Summary

Problems solved by technology

Although the above-mentioned control circuit and control method are simple in design, there are the following problems: 1. The investment in hardware is large. Two sets of buttons require two processing unit input points, two sets of connections are required, and the number of spare parts required is large, resulting in increased cost; 2. The wiring is complex and the construction volume is large, resulting in an increase in installation costs

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