Specifications

3 General Programming

3.2 Program blocks

Programming Guideline for S7-1200/1500

V1.2, Entry ID: 81318674

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Example: Downloading without reinitialization

In the following example it is displayed how to download without reinitialization.

Table 3-4 Downloading without reinitialization

Step Instruction

1. Requirement: a memory reserve has to be set (see above)

2. Open, e.g. an optimized global DB.

3. Click the “Download without reinitialization” button and confirm the dialog with

“OK”

4. Add a new tag (retentive tags are also possible).

5. Download the block to the controller.

6. Result:

 Actual values of the block remain

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.