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 Function-Decoders  MX681, MX685, MX686, MX687, MX688                                                                            Page 1 

INSTRUCTION MANUAL

 

                                                                                                               

 

 

 

 

                                                                                                              

MX681N

                                            

 

 

                       MX681                                                                            

 

                                                                                                            MX685P16

 

                                                                                                                                                   

                

 

                  MX685                                                                          

                                                                                                                                                       

    

2

 

  

 

               MX686                                                                                                                                                                         

 
                                                                                                   MX686D 
                                                                                            (Design since 2013)                               

 

 

                                                                                             

MX689 

MINIATURE - FUNCTION - DECODER 

 

MX681, MX681R, MX681N  

 

FUNCTION - DECODER  

MX685, MX685R, MX685P16 

FUNCTION - DECODER with energy storage circuitry 

MX686, MX686D

                                                                                                                            

MX688N18

                                                               

 

FUNCTION - DECODER with energy storage circuitry and low-voltage output 

MX687V, MX687W, MX687WD 

FUNCTION - DECODER with NEXT-18 interface 

MX688N18 

 

 
 

 

 

 

1

 

Overview

................................................................................................................. 2

 

2

 

Technical Information ............................................................................................... 3

 

3

 

Adressing and Programming .................................................................................... 5

 

3.1

 

Programming in “Service mode” (on programming track) ......................................................... 5

 

3.2

 

Programming in “Operations mode” (a.k.a. on-the-main, “PoM“) ............................................. 5

 

3.3

 

Decoder-ID, Load -Code, Decoder-Type and SW-Version ....................................................... 6

 

3.4

 

The (first) vehicle address ......................................................................................................... 6

 

3.5

 

The second address in a function decoder ............................................................................... 7

 

3.6

 

Analog operation ........................................................................................................................ 7

 

3.7

 

“Virtual” motor control and momentum ...................................................................................... 8

 

3.8

 

The NMRA-DCC function mapping .........................................................................................10

 

3.9

 

“Unilateral Light Suppression” .................................................................................................11

 

3.10

 

The “Swiss Mapping” 

(SW version 32 and higher)

 ...............................................................11

 

3.11

 

Dimming, Low beam and Direction Bits...................................................................................12

 

3.12

 

The Flasher Effect....................................................................................................................13

 

3.13

 

F1- Pulse Chains (only for old LGB products) .........................................................................13

 

3.14

 

Special Effects for Fun

ction Outputs (US and other lighting effects…) ..................................14

 

3.15

 

Configuration of Electric Uncouplers .......................................................................................15

 

3.16

 

SUSI-Interface and Logic-Level Output ...................................................................................15

 

3.17

 

Servo Configuration .................................................................................................................15

 

4

 

Feedback  - 

“Bidirectional communication” ............................................................. 16

 

5

 

Operating with Märklin MOTOROLA Systems ........................................................ 17

 

6

 

ZIMO Decoder - Software Update .......................................................................... 17

 

 

 

 

 

 

 

 

 

NOTE: 

ZIMO decoders contain an EEPROM which stores software that determines its characteristics and functions. The software version can be read out form CV #7 and 
#65. The current version may not yet be capable of all the functions mentioned in this manual. As with other computer programs, it is also not possible for the 
manufacturer to thoroughly test this software with all the numerous possible applications. Installing new software versions later can add new functions or correct 
recognized errors. SW updates can be done by the end user for all ZIMO de

coders since production date October 2004, see chapter “Software Update”! Software 

updates are available at no charge if performed by the end user (except for the purchase of a programming module); Updates and/or upgrades performed by ZIMO 
are not considered a warranty repair and are at the expense of the customer. The warranty covers hardware damage exclusively, provided such damage is not 
caused by the user or other equipment connected to the decoder. For update versions, see 

www.zimo.at

EDITION 

 

First edition    ---   2011 08 15 

2012 08 15 
2015 01 25 
2015 02 05 

MX688N18 supplement    ---   2015 11 16 

Swiss Mapping     ---   2016 06 23 

2018 05 25 
2018 07 11 

 

 
 

 

 

 

Содержание MX681

Страница 1: ...rs 15 3 16 SUSI Interface and Logic Level Output 15 3 17 Servo Configuration 15 4 Feedback Bidirectional communication 16 5 Operating with Märklin MOTOROLA Systems 17 6 ZIMO Decoder Software Update 17 NOTE ZIMO decoders contain an EEPROM which stores software that determines its characteristics and functions The software version can be read out form CV 7 and 65 The current version may not yet be c...

Страница 2: ...rations MX681 MX681N MX681R MX681F 7 wires 120mm long for power pick up 4 function outputs Solder pads are available for further outputs MX681 with 6 pin plug as per NEM651 and NMRA RP 9 1 1 mounted to the circuit board Versions with 8 pin plug as per NEM652 on 70mm wires or 6 pin plug on 70mm wires special order only 20 x 11 x 3 5 mm 1 0 A 8 Fu Outputs 2 Servos SUSI MX685 Family Function Decoder ...

Страница 3: ...he total current of all outputs Use the soft start op tion i e CV 125 52 to prevent cold start problems of light bulbs in rush current interpreted as a short circuit which leads to the output being turned off Software Update ZIMO decoders can be updated by the user provided that one of the following update devices is at hand ZIMO decoder update module MXULF since 2011 system cab MX31ZL or command ...

Страница 4: ...Page 4 Function Decoders MX681 MX685 MX686 MX687 MX688 ...

Страница 5: ...Programming in Operational Mode is not locked because any such programming only applies to the active loco address and reprogramming the wrong locomotive is therefore not possible Bit 7 1 Software updates via MXDECUP MX31ZL or other means are locked 112 Special ZIMO configuration bits 0 255 2 Bit 1 0 Normal acknowledgment in Service Mode by activating motor and headlight outputs 1 High frequency p...

Страница 6: ...V indicates a possible sub version number of the 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 first vehicle address Decoders are usually programmed at delivery to address 3 CV 1 3 for the DCC as well as the MM Märklin Motorola format All aspects of operation are possible with this address but it is recom mended to change to a different a...

Страница 7: ... can for ex ample be turned ON OFF with a single loco function key See chapter Function mapping The virtual motor control follows the commands of the second address if one is defined value 0 CV Denomination Range Default Description 64 Short SECOND ADDRESS 1 127 0 The short 1 byte second address it is active when CV 112 Bit 5 0 67 68 Long SECOND ADDRESS 128 10239 0 The long second address it is ac...

Страница 8: ...e loco decoder is sufficient CV Denomination Range Default Description 2 Vstart with 3 step curve 1 255 1 Internal speed step 1 255 applied as lowest external speed step speed step 1 applies to 14 28 or 128 speed step modes 1 lowest possible speed 5 Vhigh with 3 step curve 0 255 1 or 255 Internal speed step 1 255 applied as highest external speed step 14 25 or 128 depending on the speed step mode ...

Страница 9: ...ymmetrical threshold for stopping with asymmetrical DCC signal Lenz ABC method 1 14 101 114 201 214 0 1 1 4 V 106 Hundreds digit Sensitivity adjustment changes the speed with which the asymmetry is being recognized 0 fast recognition but higher risk of errors i e unreliable stopping 1 normal recognition 0 5 sec pretty save results default 2 slow recognition 1 sec very reliable 29 124 112 Individua...

Страница 10: ... with CVs 69 to 82 The commands of the first and the second address are read separately and stored according to the respective function mapping and the desired function output states After power on system boot up longer track power interruption etc the decoder is first waiting for a SECOND ADDRESS command provided the second address is not 0 and the outputs are set based on this secondary address ...

Страница 11: ...ves which of course is also useful for locos of other countries The purpose of the Swiss mapping is to switch various states of the locomotive lighting with different function keys i e for situations like driving a single locomotive cars coupled on driver s cab 1 or at the driver s cab 2 push pull shunting etc Using this relatively complex method is of course only expedient if the vehicle is equip...

Страница 12: ...ltage sup ply of the decoder see chapter Technical Information Such low voltage outputs are fully stabilized and the voltage will not fluctuate with changes in track voltage Alternatively or in addition to this the dimming effect is not limited to devices connected to full track power but also works with low voltage the PWM pulse width modulation voltage reduction is also available with CV 60 whic...

Страница 13: ... function outputs need to be dimmed than CV 60 allows or if some function outputs require a different voltage and the uncoupler function is not needed on the same vehicle then CV 115 can be used for an alternative low voltage supply The respective function outputs must be defined as uncoupler output in the corresponding CVs 125 132 159 and 160 see Special effects for function outputs CV Denominati...

Страница 14: ...ulse strobe direction 20 21 22 000110xx Rotary beacon direction 24 25 26 000111xx Gyralite direction 28 29 30 001000xx Ditch light type 1 right direction 32 33 34 001001xx Ditch light type 1 left direction 36 37 38 001010xx Ditch light type 2 right direction 40 41 42 001011xx Ditch light type 2 left direction 44 45 46 001100xx Uncoupler as defined in CV 115 48 49 50 automatic disengagement in CV 1...

Страница 15: ...erican railroads The ditch lights will only be working if the applicable bits in CV 33 and 34 are on the definition in CV 125 128 in itself is not enough but a necessary addition Example If ditch lights are defined for F1 and F2 the bits 2 and 3 in CV 33 and 34 have to be set accordingly i e CV 33 13 00001101 CV 34 14 00001110 3 15 Configuration of Electric Uncouplers System KROIS and System ROCO ...

Страница 16: ...111 Two key operation F11 F12 112 Two key operation F3 F6 113 Two key operation F4 F7 114 Two key operation F5 F8 Two key mode operates as defined with CV 161 Bit 2 Connecting servos to decoder consult the loco decoder loco manual 4 Feedback Bidirectional communication All ZIMO decoder types have been equipped with a type of feedback ever since DCC was formed which has always been a major differen...

Страница 17: ... equipment All ZIMO decoders as of 2009 are able to send their own loco address from an insulated track sections with a so called broadcast method very fast although only for one loco in that section send CV content on demand along with some decoder data such as actual speed in km h load and decoder temperature RailCom in ZIMO Decoders is activated with CV 29 Bit 3 1 AND CV 28 3 These are usually ...

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