Page 10 H0 Sound Decoder MX640
CV
Designation
Range
Default
Description
#115
Uncoupler control
(KROIS and ROCO)
“Pull-in” time and
“hold” voltage
CV # 115
alternatively used for
additional dim value
(0-90% according to ones
digit; set tens digit to 0)
0 - 99
See add.
notes
0
Active if “uncoupling” is selected (with value of
48) in CV #125......132:
Tens digit = 0 - 9, pull-in time in seconds of ap-
plied full voltage:
Value: 0 1 2 3 4 5 6 7 8 9
Seconds: 0
.
1
.
2
.
4
.
8 1 2 3 4 5
Ones digit = 0 to 9, hold power in percent of
track voltage, 0 - 90%. Applied after the pull-in
time elapsed (i.e. for ROCO uncoupler)
#116
Automated
uncoupling proce-
dure
0 – 99
100 – 199
See de-
script. in
chapter 7!
0
Tens digit (0 – 9): Length of time the loco
should move away from train; values as in CV
#115.
Ones digit (0 – 9) = x 4: Internal speed step
applied to loco (Momentum per CV #3 etc.)
Hundredths digit = 0: No tension relieve.
= 1: Tension relieve: loco
moves toward coupler (to relieve tension) be-
fore moving away.
#117 Flasher 0
-
99 0
Duty cycle for flasher function:
Tens digit = on time (0= 100msec…..9= 1 sec)
Ones digit = off time (0= 100msec…..9= 1 sec)
#118 Flashing
mask
Bits
0 - 7
0
Bit 0 to 5 for one function output each
(Bit 0 = front headlight, Bit 1 = rear headlight,
Bit 2 = function output F1, etc.)
Bit values = 0: no flasher
Bit values = 1: output flashing
Bit 6 = 1: 4th output flashing inverse!
Bit 7 = 1: 6th output flashing inverse!
#119
Low beam mask for
F6
Bits
0 - 7
0
Bit 0 to 5 for one function output each
(Bit 0 = front headlight, Bit 1 = rear
headlight, Bit 2 = function output
F1, etc.)
Bit values = 0: no low beam function
Bit values = 1: Low beam with key F6, bright-
ness determined by value in
CV #60.
Bit 7 = 0: normal effect of F6.
= 1: effect of F6 inverted.
#120
Low beam mask for
F7
Bits 0 - 7
Same as in CV #119 but for F7 key.
#121
Exponential
acceleration
0 – 99
(See add.
notes)
00
Acceleration time (momentum) can be
stretched in the lower speed range:
Tens digit: Percentage of speed range to be
included (0 to 90%).
Ones digit: Exponential curve (0 to 9).
CV
Designation
Range
Default
Description
#122
Exponential
deceleration
0 – 99
(See add.
notes)
00
Deceleration time (momentum) can be
stretched in the lower speed range:
Tens digit: Percentage of speed range to be
included (0 to 90%).
Ones digit: Exponential curve (0 to 9).
# 123
Adaptive
acceleration and
deceleration
0 – 99
(See add.
notes)
0
Raising or lowering the speed occurs only after
the speed reaches the defined range of speed
steps of the previously set target speed. CV
#123 contains the number of speed steps in
the target speed that must be reached (the
smaller this value the smoother the accelera-
tion/deceleration).
Tens digit: 0 - 9 for acceleration
Ones digit: 0 - 9 for deceleration
Value 0 = no adaptive accel. or decel.
#124
Shunting key
functions:
Momentum
reduction or
deactivation
and
Low gear
and
SUSI assignment.
(See add.
notes)
0
Bit 2 = 0: “MAN” key for shunting,
= 1: F4 key for shunting (see Bit 6 if F3
key instead of F4)
Bit 0 = 0: no effect with above key’s
= 1: removes momentum of
CV #121+122
Bit 1 = 0: no effect,
= 1: CV #3 + 4 reduced to ¼.
Bit 0 + Bit 1 = 0: no effect
= 1: removes all momentum
above.
Bit 3 = 1: F7 as half speed key
Bit 4 = 1: F3 as half speed key
Bit 5 = 1: For “DC” stopping method
*)
Bit 6 = 1: F3 as shunting key (instead of F4
as in Bit 2).
*)
If polarity dependent
“DC” stopping
method
is used (i.e. Märklin), set
CV #29, Bit
2 = 0 and CV #124, Bit 5 = 1
!
