Basic Help of TIA S7300 SCL ?

Hello
I'am using TIA portal V11 SP2.
My plc is a CPU315.

I would like to make a small program to read a peripheral profibus Element in SCL.

INPUT ADRESS :
I600...603 (2 words)
I604 (1 Byte)

OUTPUT ADRESS :
Q600...603 (2 words)
Q604 (1 Byte)

TO do that in CONT language i need to use :
DPRD_DAT to read my peripheral input
DPWR_DAT to write my peripheral output

I would like to do the same thing in SCL langage
how to do ?

Thanks