ZIMO MX640 Series Instruction Manual Download Page 28

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Page 28 H0 Sound Decoder MX640

Special procedures for owners of non-ZIMO DCC systems:

Simplified procedure (without using CV #300) with MX31, SW1.2 or MX31ZL, SW3.06

Selecting a new or replacing the current chuff set (only for steam):

(Owners of ZIMO MX1 “model 2000” -EC or - HS command stations can skip this half
page)

The following procedures are always used in the same way in spite of the flexible decoder layout
with different sound sample compilations. It is also worth mentioning that the sound samples can be
listened to and evaluated under actual operating conditions (with the engine running), not just on the
computer.

Configuration variables #266 to #355 are used for the selection and allocation of sound samples as
well as other settings. Programming CV’s in this range is no problem for high-level systems (such as
the current ZIMO DCC systems) both in “service mode” or “operations mode”.

The

selection procedure

is started with a “Pseudo-Programming” in operations mode (“on-the-

main”):

There are however many DCC systems in use (some still in production) that can only access CV’s to
#255 or even worse to #127 or CV #99.

CV #300 = 100 (only for steam / not possible with DIESEL engines!).

If the CV value ranges are also limited (i.e. 0 to 99 instead of 0 to 255): see CV #7.

The “Pseudo-Programming” (meaning that the entered value is not really stored in memory) has the
effect that the

function keys F0 to F8

no longer actuate function outputs but instead are now avail-

able for

special tasks

within the sound selection procedure. The function keys should be set to

momentary, if possible, which would facilitate the procedure.

For such applications, ZIMO sound decoders offer an alternative way of reaching higher CV’s via
lower numbers. This is done with an initial “Pseudo-Programming” of

CV #7 = 110 or

120 or = 130

The function key identifications (and the MX31 cab displays) shown are typical for a ZIMO cab dur-
ing the selection procedures (and for other sound adjustment procedures) but

is analogous to the

function keys of third party cabs

although in a different layout.

which increases the CV numbers about to be accessed by 100 or 200. For example:

If programming CV #266 = 45 is not possible, programming CV #7 = 110 followed by CV #166 = 45
executes the desired programming of CV #266 = 45.

The function keys have the following special

meaning during the selection procedure!

If neither CV #266 = 45 nor CV #166 = 45 is possible, programming CV #7 = 120 followed by CV
#66 = 45 also leads to the result of CV #266 = 45.

The initial CV #7 – “Pseudo-Programming” state – remains active for further programming (which
means CV #267 is entered as #167, CV #300 as #200 and so on) until the decoder is powered
down. ATTENTION: After re-booting the system, the “Pseudo-Programming” is lost, that is pro-
gramming CV #166 is indeed accessing CV #166 again. See below to prevent this!

With

CV #7 = 0

the “Pseudo-Programming” is stopped, which means that programming CV #166 is again program-
ming this CV.

Using as an initial “Pseudo-Programming”

CV #7 = 210 or 220

achieves the same results as above but remains active even after the system is powered down. This
state can only be cancelled with

CV #7 = 0,

which is important to remember if once again lower CV’s need to be programmed!

This is a drawing of the planned MX31

display, not an actual picture!

play: plays back the current chuff sound for evaluation; only possible with the engine at

a stand still; the chuff sounds are played automatically when the
engine is moving.

F1, F2

prev., next: plays back the previous or next recording stored in the decoder; the sound

file can immediately be evaluated with the engine stopped, with the engine
running the selected file replaces the currently active.

CLEAR + end: The

selection procedure

stopped

and the selection is cleared, that is no

chuff sound will be played (boiling and blow-off sound remains).

= STORE

+ end: The

selection procedure

stopped

with the last selected chuff set replacing

the current set.

The

selection procedure

is also stopped when programming anything else (e.g. CV #300 = 0 or

any other value but also any other CV) or by turning off power to the system. In these cases, the cur-
rent chuff set remains. Such “forced endings” are also useful when the “old” sound should remain as
the current sound without first having to locate it again.

The selection procedure is supported with

acoustic signals:

The

“cuckoo

jingle” sounds when….

…. the last stored chuff sound is reached; use the key to scroll in the opposite direction (F1, F2) to
listen to the other stored chuff sounds,
…. playback is tried (F0) but no sound sample available,

…. a wrong key is pressed (F4, F5 etc.)

MENU SOUND Selection

MO MX31 key arrangement :

(((((