Online Create Data Block in S7-300/400

Hello everyone!

Can I create an online data block in S7-300 / 400 controller.
That is, whether there are commands (or functions) for PLCs that would allow runtime, within himself to create data blocks.

How do I know that something like that exists in the PLC S7-1500 (for example - CREATE_DB).

Thanks in advance

Hello Unreality;

These SFCs are available to create, read and write DBs in a S7-300/400 CPUs.

Use the Online help or the System and standard Functions manual to see how to program them.

System Software for S7-300/400 System and Standard Functions Volume 1 and Volume 2

https://support.industry.siemens.com/cs/ww/en/view/44240604

Hope this helps,

Daniel Chartier

 Hello ,

In addition to Daniel's answer,

Unreality

How do I know that something like that exists in the PLC S7-1500 (for example - CREATE_DB).

 It's very hard (at least for me) to find instruction lists of S7-1500. However, when you look at technical specs. of S7-1500 CPU (e.g. CPU 1511C-1 PN), you will find that SFC86 is supported by S7-1500.

Best regards,

H-H