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propriately depending on its current orientation. This is done by operating the turntable
automatically by routes and by using the special turntable commands explained above.
232
Diagram 164: The block diagram
The block diagram is displayed in Diagram 164.
• There is one block “Entry” on the left side of the turntable.
• On the right side of the turntable there are three blocks assumed to be located in the
roundhouse. These blocks are called “Track A”, “Track B”, “Track C”.
• There is an additional indicator wired to the bridge of the turntable, i.e. the indicator
is turned on, when an engine is located on the bridge. This indicator is associated
with block “Bridge”. This indicator is also assigned to the bridge of the turntable
according to Diagram 158.
• A Turntable Window is created and the track layout of the turntable is configured
accordingly. The turn boundary is adjusted to separate the block “Entry” from the
blocks in the roundhouse.
• There are four routes. The first route is called “Entry to Bridge” and the other are
called “Bridge – Track A”, “Bridge – Track B”, “Bridge – Track C”. The first
route is used to turn the bridge to track “Entry” to allow engines to enter the bridge
from the left. The route “Bridge – Track A” is used to turn the bridge to “Track A”
to allow engines to leave the bridge and enter the roundhouse via this track. The
parallel tracks are operated accordingly. This is configured as operations of the
routes according to Table 11. The operation assigned to the route “Entry to Bridge”
is a normal or direct move to track “Entry”. When this route is selected no engine is
located on the bridge and the bridge shall move to track “Entry” on the shortest
possible (direct) way. The operation assigned to the other routes is specified as
turn to the left/top because the engine shall enter the roundhouse in backward direction
facing the bridge of the turntable, i.e. with orientation to the left.