Step7, Why use instance DB.

I`m new with FBD, have programmed in STL before.
We always combined FC and DB (global) in the programs.

So when will you preferred to use a instance DB together with a FB?
When you will you combine the FB with a global DB and not a instance DB?

I hope you understand "where I want"

S7 FB and FC

Hello Gordon;
The same question has been debated on the Siemens site a few times, here are some of the best answers:
Difference between FB and FC's
Differences between Function Block (FB) and Function (FC)
These should give you a good start for your reflexions.

Hope this helps,
Daniel Chartier

dchartier said:

Hello Gordon;
The same question has been debated on the Siemens site a few times, here are some of the best answers:
Difference between FB and FC's
Differences between Function Block (FB) and Function (FC)
These should give you a good start for your reflexions.

Hope this helps,
Daniel Chartier

Click to expand...

Thank you