76
multi
MAUS
hand, the switching module or relay is replaced by the decoder; this is naturally not in DCC
format, but in Motorola format.
4.5.2. CVs
All values which infl uence the behaviour of the locomotive decoder – and therefore the behav-
iour of the locomotive – are saved in so-called CVs. CV is the abbreviation for confi guration
variables. Since the
multi
MAUS
and the Z21 are compatible with the NMRA / DCC standard,
they can read and write these CVs.
With ROCO amplifi ers
10761 and 10764 and boosters 10762 and 10765 it is no longer
possible to read out the CV of a decoder! Only fi ctitious suggested values are displayed.
CVs can have a value range from “0” up to “255”. This makes it clear that reprogramming re-
quires experience, as incorrectly set CVs can affect the behaviour of the decoder.
4.5.3. Speed steps
In a conventional model railway, a regulating transformer is used to control the locomotive. The
transformer uses the speed controller to output voltage values between 0 volts and the maxi-
mum voltage (usually between 12 and 16 volts), which control the locomotive motor.
In contrast, in a digital system, fi xed voltage is applied to the track from the outset. Here, the
motor is controlled with control signals that the decoder converts into voltage values. Since
these signals consist of ones and zeros, they are graduated. The smaller the steps – speed
steps – are, the more fi nely the locomotive can be regulated. The NMRA / DCC standard which
the
multi
MAUS
operates in compliance with knows 14, 27, 28 or 128 speed steps.
Modern decoders (since about the year 2000) can be controlled in at least 28 speed steps.
They automatically adjust to the number of speed steps set in the locomotive control, meaning
the
multi
MAUS
, so that you do not have to worry about making a setting in the decoder. You
can check the respective instructions to determine whether your decoders support automatic
speed stage setting or which speed stages your decoders accept.
4.5.4. Smart Search function
The
multi
MAUS
has a Smart Search function that helps you fi nd a locomotive. This function is
available both in library mode and in locomotive address mode.
Each locomotive address you call up during operation is entered in the internal Smart Search
list. If you search for a locomotive by pressing an arrow button, the search stops briefl y at each
locomotive in this list. This helps you fi nd locomotives you have used very quickly.
A maximum of 32 locomotives can be added to the list of Smart Search addresses; this makes
sense for a minimum of one locomotive. The oldest locomotive is removed from the Smart
Search list if you have called up more locomotives than there is space for in this list. You can
delete all Smart Search addresses by restarting the system (disconnect the power supply or
unplug the master
multi
MAUS
).
You can activate the Smart Search function using the “Operation” menu item (see
3.3.2.
on
page
66).
4.5.5. Z21 and booster
They supply the model railway system with the necessary voltage and forward the digital control
signals of the
multi
MAUS
to locomotives, turnouts and other digital accessories.
The Z21 centrally manages all control commands and other information (therefore also digital
control centre Z21). The Z21 also generates the digital rail system (and much more).
Part 4 - Appendix
