When the switch is set to PLAY the previously recorded train
movements are played back, and the train runs with the same
behavior (speed, pauses and direction changes) as during the
recording run.
Dealing with sync errors
Because the recording and playback are based solely on time,
the movements during playback are not 100% consistent. A
number of factors can affect the precision of the playback:
a varying input voltage to the controller
dirt on the track
dirt on the wheels of the locomotive
the train’s motor and its lubricants warming up while in use
