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Page 26
Non-Sound Decoder MX618 - MX638 and Sound Decoder MX640 - MX659
Selecting a function key
for the
MAN function
#157
0 - 19
Only for non-ZIMO
cabs that don't have the
dedicated MN key.
3.14 The NMRA-DCC function mapping
ZIMO small-scale decoders have between 4 and 12 function outputs (FO). Things connected to these
outputs (lights, smoke generator etc.) are switched ON and OFF with the function keys of the cab.
Which function key controls which function output can be defined with the NMRA's function mapping
CV's #33 to #46.
Unfortunately, this function mapping also has its limitations (only one 8-Bit register is available for
each function, which leaves only 8 outputs to select from) and only the headlight function is intended
to change with direction.
Function outputs
Number key
on ZIMO
cabs
FA12
FA11
FA10
FA9
FA8
F0
#33 1 (L) fw
F0
#34
1 (L) re
F1
#35
2
F2
#36
3
F3
#37
4
7
F4
#38
5
7
F5
#39
6
7
F6
#40
7
7
F7
#41
8
7
6
5
4
= 01: removes momentum of
CV #121 + #122
= 10: CV #3 + #4 reduced to ¼.
= 11: removes all momentum.
In order to deactivate all momentum, CV #124 is
typically set to a value of 3 (the total value may be dif-
ferent if other Bits in CV #124 are also set).
The MAN function (or MAN key on ZIMO cabs) was
originally designed for ZIMO applications only, in order
to cancel stop and speed limit commands applied by the
signal controlled speed influence system (HLU).
This function was expanded in later software versions to
0
include "asymmetrical DCC signal stops" (Lenz ABC).
If ZIMO decoders are used with non-ZIMO systems that
don't have this key, a function key can now be assigned
with CV #157 to cancel a signal controlled speed limit or
stop command.
Function outputs
FA7
FA6
FA5
FA4
FA3
FA2
FA1
Rear
light
4
3
2
1
7
6
5
7
6
5
4
3
2
1
7
6
5
4
3
2
1
4
3
2
1
7
6
5
6
5
4
3
2
1
0
1
0
6
5
4
3
1
0
6
5
4
3
2
6
5
4
3
2
1
0
3
2
1
0
F8
#42
9
F9
#43
0
F10
#44
1
F11
#45
2
F12
#46
3
The black dots in the table above indicate the default settings at the time of delivery, where each func-
tion key corresponds to the same numbered function output. Therefore, the following values were writ-
ten to these CV's by default:
CV #33 = 1
CV #34 = 2
CV #35 = 4
CV #36 = 8
EXAMPLE of a modification: The F2 key (ZIMO #3 key) should switch in addition to output FO2 also
output FO4. Moreover, F3 and F4 should NOT switch FO3 and FO4 but rather FO7 and FO8 (cou-
plers, for example). New values are to be entered into the relevant configuration variables as follows:
CV #36=40
CV #37 = 32
CV #38 = 64
F2
3
F3
4
F4
5
# 38
3.15 The extended ZIMO function mapping
Front
Since the original NMRA function mapping does not allow for some desirable configurations some ex-
light
tensions are offered by ZIMO decoders, which are described on the following pages. Most of these
0
options are related to the ZIMO special
0
0
Note: Some of the CV #61 variations (1, 2, 3...) have been replaced over the years by other more
0
practical applications.
Programming
CV #61 = 97
CV #61 = 97 abolishes the left shift of higher CV's (#37 and up, according to the original NMRA func-
tion mapping), which allows higher function keys to be mapped with lower function outputs (i.e. Func-
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
7
6
5
4
3
2
1
0
CV #37 = 2
CV #38 = 4
CV #39 = 8
CV #40 = 16
CV # 41 = 4
and so on..
#36
7
6
#37
7
6
5
4
3
7
6
5
4
3
CV #61.
Alternative "function mapping" without "left shift":
offers an
5
4
3
2
1
0
2
1
0
2
1
0
(not for MX621)
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