Use of RD_SYS_T in SCL (S7 1200)

Hello guys !

I'm a bit new in SCL programing, since now i've only created/used Ladder based programs.

So I have a little problem, and I can't figure why it won't work : I try to get the system time (RD_SYS_T), but the syntax is always wrong, whereas i have a DTL variable and an int variable for OUTs.

(i'v got this in english : "Number of parameters transmitted in the function or in the functional block is divergent.")

I try some variations (see attachment) but it doesn't work ; please is anyone seeing my mistake  ?

Thanks in advance !

The Fiuntion RD_Sys_T has a returnvalue therefor you have to write as in the attachment

"INT":=RD_SYS_T("DTL");