Page 32 Non-Sound Decoder MX618 - MX634 and Sound Decoder MX640 - MX648
#137
#138
#139
PWM at stand still
PWM at steady speed
PWM during accelera-
tion
0 - 255
0 - 255
0 - 255
0
0
0
CV #137: PWM of FOx at standstill
CV #138: PWM of FOx at cruising speed
CV #139: PWM of FOx at acceleration
(PWM = Pulse With Modulation)
#351
Exhaust fan speed at
cruising speed
For DIESEL engines
1 - 255
128
The fan speed is adjusted by PWM; the value in CV
#351 defines the effect at steady speed.
= 128: Fan is driven at half the voltage at cruising
speed.
#352
Exhaust fan speed at
motor starts and during
acceleration
For DIESEL engines
1 - 255
255
The exhaust fan is set to a higher speed (usually top
speed) for generating the typical exhaust puff during
motor starts as well during hard accelerations.
= 255: Fan receives maximum voltage at start-up or
accelerations.
#353
Automatic smoke
generator shutdown
For STEAM and
DIESEL engines
0
– 255
=
0 - 106
min.
0
If a smoke generator is controlled by one of the effects
“010010xx“ or „010100xx“ in CV’s #127 to 132 (for one
of the function outputs FO1 to FO6), the output turns
itself off automatically after the time defined in this
CV, in order to protect the generator against overheat-
ing.
= 0: no automated turn-off
= 1 to 255: automatic turn-off after 25sec/unit, which
offers a maximum time of about 6300sec = 105min.
(#354)
See chapter 5.5
#355
Exhaust fan speed at
stand-still
For STEAM and
DIESEL engines
1
– 255
0
Supplement to the settings in CV #133 and the effects
with code “72” (steam engines) or “80” (diesel en-
gines), where the fan is only set-up for chuff beats or
during start-ups and cruising speeds.
With CV # 355, however, the fan speed is adjusted at
a standstill, so that even in this state smoke is dis-
charged (to a lesser extent). The sound must be
turned ON.
3.24 Configuration of Electric Uncouplers
“System KROIS” and “System ROCO”
When one or two of the function outputs
FO1…FO8
(FO
1… FO6 with software versions below 34)
are assigned for the uncoupler function (CV #127 for FO1 etc.), the control of the couplers as well as
the entire uncoupling process is defined by the settings in
CV #115 and CV #116.
These CV’s limit the pull-in time (to prevent overheating), define a hold-in voltage if required (i.e. Sys-
tem “Roco”) as well as the automated coupler unloading and train disengagement.
It is recommended to use the following settings for the
Krois system:
CV #115 = 60, 70 or 80;
these
settings will limit the pull-in time (at full track power) to 2, 3 or 4 seconds respectively. A hold-in voltage
is not re
quired for the Krois coupler and the ones digit can therefore remain at “0”.
CV
Designation
Range
Default
Description
#115
Uncoupler control
“Pull-in” time
and
“hold” voltage
or use of
CV # 115
for an alternative second
dim value
(dimming 0-90% using ones
digit; tens digit must be 0)
0 - 99
0
The uncoupler function is only active if
“uncoupler” is
selected (value 48) in one of the CV’s #125…132:
Tens digit (0
– 9): Time in seconds the coupler re-
ceives full voltage (pull-in time):
Value: 0 1 2 3 4 5 6 7 8 9
seconds: 0 0,1 0,2 0,4 0,8 1 2 3 4
5
Ones digit (0 to 9): hold-in power in percent of track
voltage, 0 - 90%. Applied after the pull-in time elapsed
(necessary for ROCO coupler, not needed for KROIS
coupler).
#116
Automatic disengage-
ment after uncoupling
0 - 99,
0 - 199
0
Tens digit (0
– 9): Length of time the loco should move
away (disengage) from the train; coding as in CV
#115.
Ones digit (0
– 9) x 4 = Internal speed step applied for
disengagement (Momentum per CV #3 etc.)
Hundredths digit = 0: No unloading.
= 1: Coupler unloading: engine
moves toward train in order to relieve coupler tension,
before uncoupling and disengaging from the train.
Example:
CV #116 = 61: Loco uncouples and drives away from
train for 2 seconds at speed step 4.
CV #116 = 155: Loco pushes against train first to un-
load couplers, uncouples and then drives away from
the train for 1 second at speed step 20.
Notes to automated uncoupling with coupler-unloading and train disengagement
- The automatic train disengagement is active if the tens digit in CV #116 is other than 0; if desired with prior coupler
unloading (when CV #116 > 100).
- The automatic train disengagement (or the preceding coupler unloading) is started at the same time the coupler is
activated, but only if the train is standing still (speed 0); if the train is still moving, the uncoupling, unloading and
disengagement procedure won’t start until the train comes to a full stop.
- The procedure termin
ates when the “temporary” function key is released (or pressed again if in latched mode), or
when the predetermined times (CV #115 for the coupler, CV #116 for the disengagement) have expired.
- The uncoupling and disengagement process is aborted immediately if the speed regulator is operated at the same
time.
- The driving direction for the train disengagement is always according to the cab setting; directional settings in the
“special effects” definition for uncoupling (Bits 0 and 1 of CV #127, CV #128 etc.) will not be applied.
