I have a merge where one of the lanes is feeding in with a decline right at the merge and accumulation behind the decline. The other lanes are normal with accumulation feeding directly into the merge. Attached is an example model I created of the situation: MergeWithDeclineExample.fsm
For the line with the decline the real world controls will have a photoeye at the end of the decline to run the line up to and stop awaiting release into the merge to minimize the gaps between lane releases. I placed a photoeye on the decline in the model but I am not sure how to create the logic in FlexSim to run up the box while also using the slug builder logic and merge controller.