Page 48 Non-Sound Decoder MX618 - MX638 and Sound Decoder MX640 - MX659
5.7 Diesel and Electric engines
Diesel motor sound, Turbocharger sound
Thyristor sound, Electric motor and Switchgear sound
Diesel and Electric engines have certain commonalities and are therefore described in the same
chapter: Diesel-electric propulsion systems have sound components (sound sequences) from both
areas. On the other hand, the separation of "Basic settings" and "Load dependence" (as with the
steam engines in the previous chapters) is not practical.
CV
Denomination
Range
INC-step
De-
fault
Description
#
266
Total volume
0 - 255
5
64
See chapter
5.4 “Basic settings independent of powertrain”
#280
Diesel engine
-
Load influence
0 - 255
10
0
This CV determines the reaction of the diesel
sound to load, acceleration, inclination:
Diesel-hydraulic engines
– higher and lower
rpm’s and notches
Diesel-electric engines
– cruise/idle rpm
Diesel-mechanical
– shift points.
= 0: no influence, motor rpm changes with speed
= 1 to 255: minimum to maximum influence.
NOTE: It is highly recommended to perform the
automated test run
with CV #302 = 75 first (see
chapter 5.3).
#154
Various special bits
-
0
Bit 1 = 1: DIESEL: Drive off immediately even if
idle sound has not finished playback.
Bit 2 = 1: DIESEL, ELECTRO: After short stops,
wait for idle sound before driving off.
Bit 4 = 1, bit 7 = 1: see STEAM.
#158
Various special bits
(mostly in connection
with functions
defined in various
other
CV’s)
Bit 0 = 1: SPECIAL MX648: If function output FO1
is used for automatic control of external energy
storage. This was an OEM feature. For more de-
tails contact www.zimo.at
Bit 1 = 1: DIESEL-MECHANICAL: No RPM
increase when braking (see CV #364).
Bit 2 = 0: RailCom speed (kph) feedback in the
“old” format (for MX31ZL, RailCom ID 4).
= 1: RailCom speed (kph) feedback in the
current format (RailCom ID 7).
Bit 3 = 1: “Looped” driving sounds (i.e. idle sound)
will be faded out when switching to a
different speed step in order to shorten
the sounds.
Bit 4 = 1: Steam chuff frequency increases slower
at high speed (non-proportional)
Bit 5 = 1: Braking (even by just one speed
step) causes the motor and turbo loader
sounds to decrease by on sound step.
Bit 6 = 1: Thyristor sound volume may increase
when braking (even if the volume is
CV
Denomination
Range
INC-step
De-
fault
Description
supposed to decrease according to
CV #357); see CV #357.
Bit 7 = 1: SPECIAL MX645: ELECTRIC: Flashes
of light (approx. 0.1 sec) on FO7 when
switch gear sound is played.
#394
Light-flashes with
switch gear sound
0
– 255
0
Bit 0 = 1: SPECIAL MX645: ELECTRIC: Flashes
of light (approx. 0.1 sec) on FO6 when
switch gear sound is played.
#344
Run time of motor
sounds after stops
(Cooling fan etc.)
0 - 255
=
0 - 25
sec
-
0
After the engine comes to a stop some accesso-
ries are supposed to remain operating (i.e. cool-
ing fans)
and automatically stop after the time
defined here, provided the engine di
dn’t
start up
again.
= 0
: Won’t run after stop
= 1 … 255: Runs for another 1 to 25 seconds.
#345
SHIFT key
to switch between
two sound
variations within a
sound collection:
for different operating
modes of a
locomotive or
between the sounds
of a
MULTI-SYSTEM
engine
1 - 28
0
Defines a function key (F1
– F28) which switches
between two sound types that is, between the se-
lected sound in CV #265 and the next one in the
list. For example:
- Switch between two modes of operation (light
train / heavy train) or
- Switch between electric and diesel propulsion of
a multi-system engine; typical case: Sound project
for RhB Gem.
#346
Conditions for
switching between
collections,
as per CV #345
0, 1, 2
0
Bit 0 = 1: Switches between sound collections at
stand-still even if sound is ON.
Bit 1 = 1: Switching is also possible while
driving.
#835
Further switching
keys
0 - 32
0
Extension to CV #345. Here the number of
consecutive keys can be defined, which then
switch to auf Set2, Set3, Set4, …. Then first key is
still defined in CV #345.
#347
Switch key for driving
and sound perfor-
mance when driving
solo
0 - 28
0
= 0: No key, no switch possible.
= 1…28: One of these function keys (F1 – F28)
acts as the switch-over key for driving a heavy
train or a single locomotive. Parameters are se-
lected with CV #348.
#348
Switch-over parame-
ters for driving solo
(with key selected in
CV #347)
0 - 31
0
When driving solo (Function key as per CV #347
is ON), the…
Bit 0 = 1: Diesel sound should rev up
unhindered to maximum rpm (or limited in
relation to speed step as per CV #389).
Bit 1 = 1: acceleration and deceleration times in
CV #3 and 4 should be reduced by the
amount defined in CV #390.
