进行程序的设计之前，先设计出应用程序的总体方案如图4-1,图中把整个程

Before proceeding with the design of the program, first design the overall program of the application program as shown in Figure 4-1. The diagram divides the entire program into five parts, namely the main program, return to origin, manual, semi-automatic, fully automatic, and five parts. Enter the switch button to input, the I0.0 normally open contact is closed, and the program starts. When the touch screen is input back to the origin, the intermediate relay MO.0's normally open contact is turned on, and the return to origin program is executed; when the touch screen input jogs, The normally open contact of the intermediate relay MO.1 is closed and the jog program is executed, and the touch screen input is semi-automatic. The normally open contact of the intermediate relay MO.2 is closed and the semi-automatic program is executed. The touch screen input is fully automatic, and the intermediate relay MO.3 is normally input. The open contact is closed, and the fully automatic program is executed. The programming software V4.0STEP7MicroWINSP6 provided by Siemens is used for programming.

Before the design of the program, the overall solution of the application is designed as shown in Figure 4-1, the diagram divides the entire program into five blocks, namely, the main program, back to origin, manual, semi-automatic, fully automatic, five parts. Input switch button type, I0.0 often open contact closed, the program began, when the touch screen input back to the origin, the intermediate relay MO.0 its normally open contact on, began to execute the back to the origin program; When, its touch screen input point, intermediate relay MO.1 often open contact closed, began to execute the touch screen input semi-automatic, intermediate relay MO.2 often open contact closed, began to perform semi-automatic program, its touch screen input fully automatic, intermediate relay MO.3 often open contact closed, began to perform fully automatic procedures, using Siemens V4.0STEProMicroWINSP6 programming software programming

Before the design of the program, the overall scheme of the application program is designed, as shown in Figure 4-1. In the figure, the whole program is divided into five parts: main program, back to the origin, manual, semi-automatic, full-automatic, and so on. Input the switch button, i0.0 normally open contact is closed, and the program starts. When the touch screen input returns to the origin, the normally open contact of the intermediate relay mo.0 is connected, and the program starts to return to the origin; When the touch screen input is inching, the normally open contact of the intermediate relay MO.1 is closed, and the inching program is started. The touch screen input is semi-automatic, the normally open contact of the intermediate relay mo.2 is closed, and the semi-automatic program is started. The touch screen input is fully automatic, and the normally open contact of the intermediate relay mo.3 is closed, and the fully automatic program is started. V4.0step7microwinsp provided by Siemens is adopted 6 programming software<br>