I have a OP77A (Type: 6AV6641‐0BA 11‐0AXO) installed at my facility. It communicates with Simatic S7-300 (via MPI). The S7 is time synchronized with my DCS. 

We noticed during recent event that the time on OP77A does not match the time on DCS. 

Does OP77A unit support external time source synchronization or do I have to set it up manually within the unit itself?

Thank you.

Hello, thank you. I will try this out.