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Using different routes and schedules for steam engines and other engines it is even possible
to turn steam engines to a dedicated orientation before they enter the roundhouse
while other engines directly enter the roundhouse without any turn.
Turning Engines Automatically - The Turn Boundary of a Turntable
The turn boundary of a turntable, in conjunction with specific operations to move the
bridge of a turntable automatically, are important features when a turntable is operated
automatically under control of the Dispatcher.
With the turn boundary, it is possible to control the orientation of engines during automatic
operation. It is assumed that an engine changes its orientation if the bridge passes
the turn boundary while moving an engine. This is called a turn. For details about engine
orientation refer to section 5.3, “Direction of Travel vs. Engine Orientation”,
please.
The following does not apply for transfer tables and it applies only, and it only applies
to a turntable if it is controlled automatically.
Turntables are able to perform different types of moves. This is illustrated in the diagrams
below. These different types of moves can be assigned as turntable operations to
a route, push button or indicator element, for example, in order to perform these moves
automatically.
In the examples below, the turn boundary is marked as a red line. It divides the turntable
into two parts. In all examples it is assumed that an engine enters the turntable from
the left and leaves the turntable to the right.
Diagram 160: Move without Turn
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