H0 Sound Decoder MX640 Page 7
CV
Designation
Range
Default
Description
Notes, “Step
by step CV…”
(“Strategie“)
Examples of low frequencies:
# 9 = 255: frequency of 30 Hz,
# 9 = 208: frequency of 80 Hz,
# 9 = 192: frequency of 120 Hz.
#10
EMF Feedback
cut-off
NOTE: This CV is seldom
required.
0 – 252
(See add.
notes)
0
Assigns an internal speed step above which
back EMF intensity is reduced to the level de-
fined in CV #113. CV #10, #58 and #113 to-
gether define a back-EMF curve.
If either CV #10 or #113 is set to 0 a default
curve is valid.
#13
Analog functions
0 - 255
0
Selects function outputs F1 to F8 that should
be “on” in analog mode.
Each bit equals one function; Bit 0 = F1, Bit 1 =
F2, Bit 6 = F7, Bit 7 = F8.
#14
Analog functions
Acceleration, decel-
eration and motor
control in
analog operation.
0 - 127
64
(Bit 6 = 1)
Bits 5 to 0: Selects function outputs F12 to F9
as well as FLr and FLf that should be “on” in
analog mode. Each bit equals one function
(Bit 0 = front headlight …..Bit 5 = F12).
Bit 6 = 1: Analog operation without acceleration
and deceleration according to CV #3 and #4.
Bit 6 = 0: Analog operation with acceleration
and deceleration according to CV #3 and #4.
Bit 7 = 0: unregulated DC operation
Bit 7 = 1: regulated DC operation
#17
+
#18
Extended address
128 -
10239
0
The long 5-digit primary address (>127).
This address is only active when Bit 5 in CV
#29=1. Otherwise address entered in CV #1 is
active (<127).
#19 Consist
address
0 - 127
0
An additional address that is used to operate
several locos in a consist. If a consist address
is assigned to this CV, commands for the pri-
mary and extended addresses (CV’s #1 and
#17/18) will be ignored by the decoder. This
CV is seldom used within ZIMO systems, since
it is more comfortable to build and control con-
sists with the cab (using the “normal” single
addresses).
#21
Consist functions for
F1 - F8
0 - 255
0
Selected functions that should operate with the
consist address.
(Bit 0 for F1, Bit 1 for F2, Bit 2 for F3 etc.)
Applicable Bits set to 0 = function controlled by
single primary address.
Applicable Bits set to 1 = function controlled by
consist address.
CV
Designation
Range
Default
Description
,
#22
Consist address
activates headlights
0 - 3
0
Select whether the headlights are controlled
with consist address or single address (Bit 0 for
front headlight, Bit 1 for rear headlight)
Respective Bit = 0: function output controlled
with single address
Respective Bit = 1: function output controlled
with consist address
#23
Acceleration
trimming
NOTE: This CV is seldom
required
.
0 - 255
0
To temporarily adapt the acceleration rate, i.e.
to a new load or when used in a consist.
Bit 0 - 6: entered value increases or decreases
acceleration time in CV #3.
Bit 7 = 0: value added.
= 1: value subtracted.
#24
Deceleration
trimming
NOTE: This CV is seldom
required.
0 - 255
0
To temporarily adapt deceleration rate, i.e. to
load or when used in consist.
Bit 0 - 6: entered value increases or decreases
deceleration time in CV #4.
Bit 7 = 0: value added.
= 1: value subtracted.
#27
Direction
dependent stops
with asymmetrical
DCC signal
(Lenz “ABC”
method)
0, 1, 2, 3
0
This CV activates the direction dependent stopping
feature with asymmetrical DCC signal (also known
as Lenz “ABC”).
Bit 0 = 1: Stops are initiated if voltage in right rail
is higher than left rail (in direction of
travel). THIS, CV #27 = 1, IS THE
COMMON APPLICTION for this
feature (provided the decoder is wired
to the correct rail).
Bit 1 = 1: Stops are initiated if voltage in left rail
is higher than right rail (in direction of
travel).
Stopping is directional if only one of the two bits is
set (not both). Traveling in the opposite direction
will have no effect. Use the other bit In case the
train stops in the wrong direction!
Bit 0 and 1 = 1 (value = 3): Stops in both
directions.
NOTE: See CV #134 for setting the asymmetrical
threshold if problems are encountered (e.g. train
won’t stop with asymmetrical signal or stops with-
out asymmetrical signal present).
