TrainController Gold and Silver - Freiwald Software

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Diagram 87: Train is still located inside the sensed section
Diagram 88: Train has left the sensed section – the sensor is turned off
There is one major difference between momentary contacts and occupancy sensors to
remember: the points at which the indicators are turned on. A momentary track contact
is turned on when a train reaches a certain point on the layout regardless of the direction
of travel of the passing train. In this way a momentary track contact represents one single
sensing point on the model railroad. An occupancy sensor is turned on when a train
reaches either end of the sensed track section depending on the current direction of travel
of the passing train. In this way an occupancy sensor represents two different sensing
points on the model railroad. It depends on the direction of travel of a passing train
at which of these two points the train triggers the sensor.
Even though the software works well with both types of sensors, momentary and occupancy,
it is important to ensure, that the indicator symbol, that is associated with a certain
sensor, is only turned on once by each passing train, even if the physical sensor is
triggered two or more times by the same passing train. Indicator symbols, that are
turned on two or more times by the same passing train (“flickering”) may mislead the
software and can cause unexpected behavior of the affected trains. This is especially
true for trains running under automatic control of the computer. Each indicator symbol,
that is being passed by a train under automatic control of the computer,
should be turned on only once by the passing train.