Page 30 Non-Sound Decoder MX618 - MX638 and Sound Decoder MX640 - MX659
Functions, Keys
Outputs
Front
Rear
F0, forward
(Cab 1 forward)
Lfor
FO1
FO6
Locomotive only
F0, reverse
(Cab 2 forward)
Lrev
FO2
FO4
Locomotive only
F0 + F15,
forward
(Cab 1 forward)
Lfor
FO1
FO2
Train, cars coupled at cab 2,
standard train without pilot car.
F0 + F15,
reverse
(Cab 2 forward)
Lrev
FO1
FO2
Train, cars coupled at cab 1,
standard train without pilot car.
F0 + F16,
forward
(Cab 1 forward)
Lvor
FO1
Train, cars coupled at cab 2,
standard train with pilot car or first engine
in a double header.
F0 + F16,
reverse
(Cab 2 forward)
FO3
FO4
Loco pushing, cars coupled to cab 2, with
pilot car or first engine in a double header.
(prototypical since 2000)
F0 + F17,
reverse
(Cab 2 forward)
Lrev
FO2
Loco pulling, cars coupled to cab 1, train
with pilot car or first engine in a double
header.
F0 + F17,
forward
(Cab 1 forward)
FO5
FO6
Loco pushing, cars coupled to cab 1, with
pilot car (prototypical since 2000).
F0 + F18,
forward,
(Cab 1 forward)
FO6
Loco pushing, cars coupled to cab 1, with
pilot car or last engine in a double header.
(prototypical up to 2000)
F0 + F18,
reverse
(Cab 2 forward)
FO4
Loco pushing, cars coupled to cab 2, with
pilot car or last engine in a double header.
(prototypical up to 2000)
F0 + F19,
forward
(Cab 1 forward)
FO2
Loco pulling as last engine in consist, cars
coupled to cab 2.
F0 + F19,
reverse
(Cab 2 forward)
FO1
Loco pulling as last engine in consist, cars
coupled to cab 1.
F0 + F20,
forward/reverse
---
Engine(s) inside a consist
3.18
The ZIMO “Input Mapping”
(ONLY for sound decoders)
SW versions 34 and up, also for function outputs via SUSI!
The NMRA function mapping limitations (only one of 8 functions per one of the 12 function keys) can
be overcome with the ZIMO “input mapping”. In addition, the function keys (=
external functions)
can
quickly be adapted to the wishes of the operator and that for both, function outputs and sound func-
tions, without the need of changing the
internally mapped functions
and especially without changes
to the sound projects:
CV’s #400 …
#428
CV
Denomination
Range
Default
Description
#400
Input mapping
for internal
F0
that is, which function
key switches the internal
(decoder) function F0.
0,
1 - 28, 29
30
– 187.
254, 255
0
= 0: Key F0 (that is, F0 received from the DCC-packet)
is sent to the internal (decoder) F0 (1:1).
= 1: Key F1 is sent to the internal F0.
…..
= 28: Key F28 is sent to the internal F0.
= 29: Key F0 is sent to the internal F0.
= 30: Key F1 to F0, only in forward direction.
…..
= 57: Key F28 to F0, only in forward direction.
= 58: Key F0 to F0, only in forward direction.
= 59: Key F1 to F0, only in reverse direction.
…..
= 86: Key F28 to F0, only in reverse direction.
= 87: Key F0 to F0, only in reverse direction.
= 101: Key F1-inverted to internal F0
…..
= 187: Key F0- inverted to internal F0, in reverse dir.
= 254: Directions Bit to internal F0, in forward dir.
= 255: Directions Bit to internal F0, in reverse dir.
#401
-
#428
Input mapping
for internal
F1 … F28
0,
1 - 28, 29,
30 - 255
0
Same as input mapping above for other functions:
CV #401 = 0: Key F1 to internal F1
= 1: Key F1 to internal F1
= 2: Key F2 to internal F1 and so on.
3.19 Dimming, Low beam and Direction Bits
Some things connected to function outputs may sometimes require less than full track voltage, as is
the case for example with 18V bulbs when having 24V on the track (quite common on large scale
model railroads). Other times you simply want to reduce the brightness of the headlights.
The best solution in such cases is to connect the positive side of such devices to the low voltage sup-
ply of the decoder (see chapter “Installation and wiring”). These outputs are fully stabilized so the
voltage does not fluctuate with changes in track voltage.
Alternatively or in addition to this, the PWM voltage reduction is also available with
CV #60,
