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Diagram 123: Trigger of a Flagman
By selecting and or or in the first entry of the trigger additional possibilities are available.
If and is selected, then all elements listed in the trigger must be in the required
state to turn on the flagman. If or is selected, then the flagman is already turned on, if at
least one of the elements has the required state.
In the example displayed above, the flagman is turned on if the signal “Station – Exit 3”
is red and the track section “Station 3” is occupied.
It is also possible to create complex triggers by mixing ‘and’ or ‘or’. This is done by
means of AND and OR groups. These groups are described in detail on page 177. They
work in the same way in triggers as they do in conditions.
It is furthermore possible to include a flagman in the trigger of other flagmen. This
function provides the ability to specify trigger conditions with virtually unlimited complexity.
Flagmen and Operations
It is possible to assign a set of operations to each state (on/off) of a flagman (see section
12.3, “Operations”). In this way it is possible to operate a set of elements automatically
when a certain event occurs. This feature enables flexible semi-automation of your
switchboards.