Creating Reusable Code Blocks - Siemens SIMATIC S7-1200 System Manual

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Programming concepts

7.3 Using blocks to structure your program

Creating reusable code blocks

You can store objects you want to reuse in libraries. For each project, there is a project

library that is connected to the project. In addition to the project library, you can create any

number of global libraries that can be used over several projects. Since the libraries are

compatible with each other, library elements can be copied and moved from one library to

Libraries are used, for example, to create templates for blocks that you first paste into the

project library and then further develop there. Finally, you copy the blocks from the project

library to a global library. You make the global library available to other colleagues working

on your project. They use the blocks and further adapt them to their individual requirements,

where necessary.

For details about library operations, refer to the STEP 7 online Help library topics.

Use the "Add new block"

dialog under "Program

blocks" in the Project navi-

gator to create OBs, FBs,

FCs, and global DBs.

When you create a code

block, you select the pro-

gramming language for the

block. You do not select a

language for a DB because

it only stores data.

Selecting the "Add new

and open" check box (de-

fault) opens the code block

in the Project view.

S7-1200 Programmable controller

System Manual, V4.2, 09/2016, A5E02486680-AK