TL;DR
Train schedules should handle a station that is not connected to a circuit network the same as a station that is connected to an empty circuit network.What?
Currently, when a train station is not connected to a circuit network, train schedules at that station will evaluate all circuit conditions to False.However, I think that in this case, conditions that would evaluate to True when the station had circuit connection to just a pole, should still evaluate to True. As an example, the condition 'wood == 0' should evaluate to True, no matter if there is no circuit network or a circuit network where wood is actually 0.
Why?
1) This would match the behavior of combinators.2) When needing to change schedules of trains or whole train groups during a playthrough to include circuit conditions that evaluate to True if a certain signal is 0, I currently need to go to every single train stop and ensure that it is connected to a circuit network. Alternatively, I can connect each train station to a single power pole by default. The first one is very annoying, not fun and error-prone, the second one goes directly against the principle of build it when you need it, like outlined in FFF 402.
Ref: 123385 and 133110.