TrainController Gold and Silver - Freiwald Software

off again, even if the track occupancy detector is still turned on – this is done because
the Forced Reset option is selected. Turning off flagman “timer” is reported to the
flagman “alarm” by the trigger of “alarm”. The flagman “alarm” now checks its condition,
i.e. if the track occupancy detector is still turned on by some inadvertently uncoupled
cars. If this is the case then “alarm” is turned on and performs the emergency
operations.
The time period specified as memory of flagman “timer” must be large enough to enable
the longest/slowest train to leave the occupancy detector. Otherwise a false alarm
would be triggered. On the other hand the time period must be shorter than the interval
between two successive trains. Otherwise it could happen that the next train has already
turned on the occupancy sensor when the “timer” is turned off.
It is obvious that this mechanism only works if uncoupled cars can be detected by the
track occupancy detector. If necessary, the axles at the end of each train can be made
conductive using an appropriate resistor.
Example: Simple Track Occupancy Detection
The following example demonstrates how a track occupancy detection is made possible
using temporary track sensors.
Diagram 148: Simple Track Occupancy Detection
In addition to the contact indicators, an additional flagman indicator is needed for indication
of occupancy.
• Place or select the contact indicators into the track diagram and specify the digital
addresses of the respective track sensors.
• Create a flagman for indication of occupancy.
• Specify both contact indicators as trigger of the flagman using the option Or.
• Set the memory of the flagman to Toggle.
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