Hello

is there any guideline on how to set up fail-safe communication between S7-1500 and S7-300 ?

I can't make them to communicate 

Dear Towome

the manual you indicated refers to TIA PORTAL environment only?

I have the S7-1500 project made in TIA portal and S7-300 project made in  SIMATIC Manager environment.

In the Simatic Manager environment I must use communication function SENDS7 and RCVS7 but in TIA environment I must use SENDDP and RCVDP.

Is that even possibile to establish Safety communication in this scenario?