TrainController Gold and Silver - Freiwald Software

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rent state of the condition. For this purpose the additional option Forced Reset can be
selected.
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Example: Preventing an Indicator from Flickering
In the following example it is assumed that a certain momentary track contact is triggered
by each axle of a passing train. It shows how the indicator symbol can be prevented
from flickering. Finally, the indicator will be turned on only once by a passing
train.
• Create a contact indicator and link it to the momentary track contact.
• Set the memory of the indicator to Timer 2 Seconds.
Memory
Indicator Reset:
after 2 seconds
Table 5: Preventing an Indicator from Flickering
When the first axle of a passing train touches the track contact, then the indicator is
turned on. When this axle leaves the track contact, the indicator remains turned on until
the 2 seconds have passed. If the next axle of the train touches the track contact before
the timer expires then the indicator will remain turned on for another 2 seconds and so
on. The indicator is turned off when no further axle of the train touches the track contact,
i.e. when the train has passed the contact completely. In the software the indicator
is turned on only once regardless of how many cars and axles the train contains.
Preventing contacts from flickering is especially recommended when feedback indicators
are being used for automatic control of trains. Each indicator symbol, that is
passed by a train under automatic control of the computer, should be turned on
only once by the passing train. Indicators, 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.
14.3 Protection and Locking with Conditions
In addition to the locking mechanisms provided by routes, there are even more possibilities
for locking and protection. It is possible to restrict the operation of turnouts, signals,
accessories and routes to certain conditions called conditions. For instance, it is