I would like to push data in a DB.
I would like to have a 100 variable DB (byte). 
A data is placed in the first place, by an input. 
Then when this input gives a signal again, 
the data that was in the first place should 
go to the second place and the new data should come
to the first place. 
This is a process to push as soon as there is input again. 
SFC20 is not the best because it would be a very long program, 
I would like to solve it with a pointer. 
Thanks

The most effective way to handle this type of application is to use a circular buffer [LINK: https://en.wikipedia.org/wiki/Circular_buffer]. That ensures that you are not pushing data around. Less waste on the processing. 

The work principle is that a read pointer and write pointer is used. Only the pointers move.

Using SCL would be a bit more easy to implement when using arrays. In STL some indirect addressing needs to be used. Some example may exist for the S7-300 on the support site. Best to search first.

Else use Mr. Brucatori idea if you wish to make use of a ready made and available code. Hopefully you have access to SCL. Or perhaps ask him to volunteer to code with STL using indirect addressing and pointing to the DB you requested.

qwazee

Else use Mr. Brucatori idea if you wish to make use of a ready made and available code. Hopefully you have access to SCL. Or perhaps ask him to volunteer to code with STL using indirect addressing and pointing to the DB you requested.

 I'm available if you, at the same time, will payme a coffee.

Gustavo Antonio Banchetti Brucatori

 

qwazee

Else use Mr. Brucatori idea if you wish to make use of a ready made and available code. Hopefully you have access to SCL. Or perhaps ask him to volunteer to code with STL using indirect addressing and pointing to the DB you requested.

 I'm available if you, at the same time, will payme a coffee.

@Kozma10 should take you up on your offer. Even at the high prices that coffee sells for now, its a bargain to rent your expertise for a short while with only a coffee. Unless you have a speciality coffee like Black Ivory in mind.

Hackers are coffee to code converters  

qwazee

 @Kozma10 should take you up on your offer. Even at the high prices that coffee sells for now, its a bargain to rent your expertise for a short while with only a coffee. Unless you have a speciality coffee like Black Ivory in mind.

 Simply a good Italian 'Illy' espresso, of course, including travel expenses.

Thanks, I'll do it again Meanwhile, my colleague did something similar