Each locomotive on a railway layout has to be configured correctly to be controled by RailControl.
If more than one control is configured by RailControl, the control that controls the locomotive has to be selected. Otherwise the selection is not shown at all.
If the control supports more than one digital protocol, the protocol that is used by de locomotive has to be selected.
The digital address that is used by de locomotive has to be entered.
The length of the train prefered in cm. This is mainly user for the automatc operation to deside if a train can enter a route or a destination track.
RailControl supports multitraction. It is required that all locomotives in a multitraction have the same speed at the same level. Also should all locomotives know the absolute driving direction. Märklin Motorola 1 does not support absolute driving direction.
One locomotive can have configured several other slave locomotives, which then have the same behavior like the master locomotive.