s5 libraries

hi all

i need to convert an s5 program to s7
the s5 program was call fb51 and fb52 which are libraries called tdop:511 and tdop:523

can someone expalin these fb
i tried to look them up in the manuals i have but i did not find them
also there are calls for ob 255 , what i have red in the amnual is that this transfer data blocks to db ram and tere is no equivalent for them in the s7 , so how should i handle them ?

i found out that these fb are related to the op used

thanks

Hi Amr Hassan,

These blocks are cpu depended to connect an OP to programming port.
Attached you will find the libraries for all s5-cpu´s.

But for s7 you dont need these blocks, forget them, you should only know wich db's are used to data transfer.

Good luck,