plc s7-300 vietnam pro1_09e_dbs

SITRAIN Training for

Automation and Drives

ST-7PRO1

Page 1 Data Storage in Data Blocks

Contents Page

Objectives ......................................................................................................................................... 2

Storage Areas for Data …………..................................................................................................... 3

Data Blocks (DBs) ............................................................................................................................ 4

Overview of Data Types in STEP 7 ................................................................................................. 5

Elementary Data Types in STEP 7 ..................................................................................................... 6

Creating a New Data Block ............................................................................................................ 7

Entering, Saving, Downloading and Monitoring a Data Block .......................................................... 8

Addressing Data Elements …........................................................................................................... 9

Accessing Data Elements .............................................................................................................. 10

Exercise: Counting the Transported Parts (FC 18) ………...……………………………….…........... 11

Complex Data Types …………........................................................................................................ 12

Example of an Array .......................................................................................................................... 13

Example of a Structure ..................................................................................................................... 14

Date: 25.07.2008

File: PRO1_09E.1

SIMATIC® S7

Siemens AG 2002. All rights reserved.

SITRAIN Training for

Automation and Drives

Data Storage in Data Blocks