Siemens Simatic S7-300 Erste Schritte - Seite 29

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3.11

10. Step: Controlling the axis with the STEP 7 user program

Procedure

Step

Activity

In SIMATIC Manager, open the sample project

"\Examples\PROJECT-CPU317T". Copy the blocks listed

below to your project:

OB1

•

FB 100 (SimplePositioning)

•

FB401 (MC_Power)

•

FB402 (MC_Power)

•

FB405 (MC_Halt)

•

FB410 (MC_MoveAbsolute)

•

DB 100 (IDB_SimplePositioning)

•

AxisData (variable table for axis control)

•

Confirm the message "The object 'OB1' already exists. Do

you want to overwrite it?" with "Yes".

Also copy the inputs (I), outputs (O) and flags (F) from the

example symbol table to the project, so that the symbols are

displayed completely in the variable table.

Important: The sample program does not contain DB 1 to

DB 4! Create these technology DBs in STEP 7 (see the step

"Creating the technology DBs"), in order to maintain

consistency between the user program and the technology

objects.

Double-click the FB 100 if you want to edit the program

example.

Select these settings:

View > LAD,

•

View > Overviews, and

•

View > Details.

•

Load the entire user program to the CPU selecting Target

system > Download user program to memory card in the

SIMATIC Manager.

Confirm the message box with "Yes".

CPU 317T-2 DP: Controlling a physical axis

Getting Started, 03/2008, A5E00251786-05

3.11 10. Step: Controlling the axis with the STEP 7 user program

Result

The sample program is copied to the project.

The LAD/STL/FBD editor opens.

You have now opened an extended and

clear view for editing the STEP 7 user

program.

The STEP 7 user program is now stored in

the CPU. This download of your SDBs may

take longer (up to a few minutes), because

of their larger data volume.

Learning units