Reusability Of Blocks - Siemens S7-1200 Programming Manualline

3 General Programming
3.2 Program blocks
Example: Downloading without reinitialization
In the following example it is displayed how to download without reinitialization.
Table 3-4 Downloading without reinitialization
Step
1.
2.
3.
4.
5.
6.
Note Further information can be found in the online help of the TIA Portal under
"Loading block extensions without reinitialization".
You will find further information in the following entry:
What options does the S7-1500 provide for downloading data in RUN?
http://support.automation.siemens.com/WW/view/en/76278126
3.2.8

Reusability of blocks

The block concept offers you a number of options to program in a structured and
effective way.
Advantages
Blocks can be used universally in any location of the user program.
Blocks can be used universally in different projects.
Programming Guideline for S7-1200/1500
V1.2, Entry ID: 81318674
Requirement: a memory reserve has to be set (see above)
Open, e.g. an optimized global DB.
Click the "Download without reinitialization" button and confirm the dialog with
"OK"
Add a new tag (retentive tags are also possible).
Download the block to the controller.
Result:
Actual values of the block remain
Instruction
39