Siemens NAN 67 Series Servisní příručka stáhnout pdf (Strana 22)

2-6

Ladder Logic (LAD) for S7-300 and S7-400

C79000-G7076-C504-02

When you save a block in the Editor, remember the following points:

S File

Save always saves the block in the “Blocks” folder on the hard disk

of your programming device/PC.

S PLC

Download downloads the opened block to the CPU.

After creating the blocks for your user program, download them to the S7

CPU in your SIMATIC Manager. For further information about downloading

user programs, refer to the User Manual /231/.

Note

It is not always sufficient to download the created blocks individually to the

CPU because data from the system configuration may sometimes be

required. You should therefore download the complete program in the

SIMATIC Manager.

The LAD Editor has the following functions which you will find useful when

creating programs and starting up.

Table 2-1 Supporting Functions in the LAD Editor

Function Menu Command

Call reference data of the active user

programs

Options

Reference Data

Edit the symbol table / individual

symbols

Options



Symbol Table /

Options



Edit Symbols

Monitor / modify variables PLC

Monitor/Modify Variables

Display / modify operating mode or

memory reset on the CPU

PLC

Operating Mode or

PLC



Clear/Reset

Display the status of the selected

module

PLC

Module Information

Set the time and date on the CPU PLC

Set Time and Date

These functions are described in detail in the User Manual /231/.

Saving and

Downloading

Blocks

Calling Supporting

Functions

Introduction

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