Under R80.x then when you open the SmartConsole to the SMS then if you have seperate Log Server, even a seperate Event Server then the information from those Servers is displayed in the SmartConsole connected to the SMS.
Gives you the Unified Console where logs, events, etc all visible.
The connectivity between the devices goes on in the background so you don't need to open each one.
You can still direct SmartConsole at the IP of the Log Server if you want and it will just give you the Log Tab and won't see the Policy or Gateways part.