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7.1
System change during analogue operation
All SILVER decoders can be operated on conventional layouts
with traditional DC devices. If Bit 3 is set in CV29, a locomotive
equipped with a decoder will behave in conventional operation
like a locomotive without a decoder. However, a starting delay
programmed in the decoder can be used.
Even a flying splice between a digital and a conventional layout
section is possible. Here, the locomotive will behave as follows:
7.1.1
Change from digital to conventional
During a change from a digital layout section to a conventional
section, the locomotive decoder follows the polarity of the
conventional section. If the polarity of the section (and the
resulting direction of travel according to NEM) matches the
direction of travel in the digital section, the locomotive will
continue without stopping. However, because the speed
depends on the voltage applied in the conventional section,
variations in speed are possible.
If the polarity does not match the direction of travel, the
locomotive will stop following the braking delay set in the
locomotive decoder.
When the model railway is in operation, this behaviour can be an
advantage when stopping in front of signals. Simply add a
separate braking section in front of a signal, which is supplied
with direct current if the signal is "red". The current’s polarity in
the direction of the signal is set so that the locomotive stops. If
the signal is passed in the opposite direction, the locomotive will
drive through despite the red signal. A disadvantage is the
possible variation in speed which may occur during the change.
To find out how this can be avoided, please refer to the Section
"System change with switched-off analogue operation", page 20.
A relevant example is contained in the operating manual of the
sectioning model LT100 which is necessary for the transition
from digital to analogue operation and vice versa.
7.1.2
Change from conventional to digital
If a locomotive changes from the conventional layout section
back to the digitally controlled area, the locomotive decoder will
again be able to receive digital information. As in the case of the
example above, different reactions of the locomotive are
possible:
If the direction of travel transmitted by the
Digital plus by Lenz
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