ZIMO MX638 Series Instruction Manual Download

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Non-Sound Decoder MX600 - MX638 and Sound Decoder MX640 - MX659 Page 15

3.2

Programm

ing in “Operational Mode” (on-the-main “PoM”)

According to the current NMRA DCC standards,

it should only be possible to program and read CV’s

on the main track, but not assign new vehicle addresses. However, certain DCC systems (among
them ZIMO beginning with the system generation MX10/MX32) will allow addresses to be modified on
the main track with the help of bidirectional communication.

All ZIMO decoders are equipped with bidirectional communication (

“RailCom”

) and can therefore

(with a corresponding DCC system such as ZIMO MX31ZL and all devices of the new MX10/MX32
generation) read, program and acknowledge successful CV programming steps in operations mode
(on the main track). This requires RailCom to be activated, which is the case if the following CV’s are
set as:

CV #29, Bit 3 = 1

(usually CV #29 = 14)

AND

CV #28 = 3

This is usually the default setting, except in certain sound projects or OEM CV sets, where they need to
be set prior to all other programming.

3.3

Decoder-ID, Load-Code, Decoder-Type and SW-Version

Denomination

Range

Default Description

#250,
#251,

#252,

#253

Decoder-ID

Also identifies decoder

type with

CV #250 = Decoder

type

(see chapter 2)

Read only

The decoder ID (serial number) is automatically entered
during production: The first Byte (CV #250) denotes the
decoder type; the three other Bytes contain the serial
number.
The decoder ID is primarily used for automatic address
assignment when an engine is placed on the layout
track (future function) as well is in conjunction with the
“load code” for “coded” sound projects (see CV #260-

Denomination

Range

Default Description

263).

#260,

#261,
#262,

#263

“Load code”

for

“coded” sound projects

New ZIMO sound decoders can be ordered for a small
fee with the “load code” pre-installed, which entitles the
user

to install “coded” sound projects of a selected

sound bundle.

The load code can also be purchased and installed by
the user at a later date: see

www.zimo.at

Manufacturer ID

and

HARD RESET

with CV #8 = 8

or CV #8 = 0

Configure decoders

as “C-type” or

“D-type” (MX634 only):

MX634D:
FO3,FO4

= normal outputs

MX634C:
FO3,FO4 = logic level outputs

Activate Special CV Set

Read only

Reading out

the decoder

always shows

“145”, which is

ZIMO’s

assigned

number.

For pseudo

programming
see “Descrip-

tion” column

on the right.

145

( = ZIMO)

Reading out this CV always result in “145”
(”10010001”), the number issued for ZIMO by the
NMRA.

This CV is also used for various resetting processes
with the help of Pseudo-Programming.

Pseudo-Programming means that the entered value is not really stored, but
rather used to start a defined action.

CV #8 = “3”



Converting a MX634D to MX634C

CV #8 = “4”



Converting a MX634C to MX634D

CV #8 = “8”



HARD RESET

(NMRA standard);

all CV’s return to the last active

CV set or sound

project,

or the default values listed in this CV table if

no such set was active before.
CV #8 = “9”



HARD RESET for LGB-MZS operation

(14 speed steps, pulse chain commands).

Further options: see chapter “CV Sets”!

SW-Version Number

Also see CV #65 for

Sub-Version Number

and

special procedures for pro-

gramming with “Lokmaus-2”

and other “low level” sys-

tems

Read only

Pseudo-

programming

see explana-

tion to the right

This CV holds the firmware version number currently in
the decoder.

With the help of “Pseudo-programming” it also helps to
program decoders with DCC systems of limited range:

Ones digit = 1: Subsequent programming value + 100
= 2: ... + 200

Tens digit = 1: Subsequent CV number

+ 100

= 2:

… + 200

etc.

= 9:

… + 900

Hundreds digit = 0: Revaluation applies only once
= 1:

… until power-off

#65

SW-

Sub-Version Number

Also see CV #7 for

main version number

Read only

This CV indicates a possible sub-version number of a
main version noted in CV #7.

The entire SW version number is thus composed of
CV #7 and #65 (i.e. 28.15).

3.4 The vehicle address(es) in DCC mode

Decoders are usually delivered with default

address 3

(

CV #1 = 3

for the DCC as well as the MM

(Märklin Motorola) format. All aspects of operations are possible with this address but it is recom-
mended to change to a different address as soon as possible.

Denomination

Range

Default Description

#28

RailCom Configuration

0 - 3

Bit 0 - RailCom Channel 1 (Broadcast)
0 = OFF

1 = ON

Bit 1 - RailCom Channel 2 (Data)
0 = OFF

1 = ON

#29

Basic settings