Siemens v1.0 Manuel de service télécharger pdf (Page 41)

Simple example

2.4 Create program

STEP 7 Basic V10.5

Getting Started, 12/2009, A5E02651459-01

6. Insert the "Negated coil" instruction at the end of the branch.

Note

Modifying an instruction

If you have selected the wrong instruction type, you can modify it directly in the network

by means of the instruction icon. You open the drop-down list for selection of an

instruction icon by moving the mouse pointer across the yellow triangle in the upper right-

hand corner of the instruction.

Result

By inserting the LAD instructions in the first network of the organization block "Main [OB1]",

you have created the first part of the program for switching the example machine on and off.

In the next section, you interconnect the LAD instructions with PLC tags and thereby close

the program.

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Siemens v1.0 Manuel de service Page 41