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Non-Sound Decoder MX600 - MX638 and Sound Decoder MX640 - MX659                    Page 25 

may however be useful to use this method if used together with decoders from other manufacturers 
that do not have the capability mentioned above, in order to harmonize the brake sequences. 

The second method may also be the preferred method if distance controlled stopping is used manual-
ly (CV #140 = 2 or 12), so that the train reacts immediately to speed changes from the throttle. 

 

  

First method for con-
stant stopping dis-
tance

 

 

 

 

 

 

 

 

Second method 
for constant stop-
ping distance 

 

 

               

 
 
 

 

 

“Distance controlled stopping“, when activated, is 

exclusively 

applied

 to decelerations leading to a 

full stop,

 but not to speed reductions without stopping (these are still handled by CV #4). Neither is 

there any influence to acceleration events. 

The traveled distance is constantly being recalculated in order to get as close as possible to the de-
sired stop point. The deceleration rate within distance controlled stopping is always applied exponen-
tially, that is the deceleration rate is high in the top speed range followed by gentle braking until the 
train comes to a full stop; which in this case is 

not

 governed by CV #122! The application of CV #121 

for exponential acceleration however remains unchanged. 

3.13  Shunting, Half-Speed and MAN Functions: 

On the one hand, defining the different Configuration Variables (#3, 4, 121, 122 and 123) offers proto-
typical acceleration and deceleration behavior, but is on the other hand often obstructive for quick and 
easy shunting. 

This is why the momentum can temporarily be reduced or eliminated altogether with a dedicated func-
tion key. Also, during shunting maneuvers it is sometimes helpful to have the speed range of the 
throttle cut in half.  

For historical reasons, the assignments for these "shunting-key functions" are summarized in CV 
#124, which is associated with restrictions and also relatively confusing. 

From today’s perspective,

 CV's #155, #156 and #157 are the 

preferred

 

CV’s for these settings, 

where function keys can be selected in a systematic and unlimited manner for each of the shunting 
and MAN functions. CV #124 (Bits 0 & 1) is still relevant though for the type of momentum deactiva-
tion. 

#124 

 

 

 

Shunting key  

functions: 

 

Low gear (half speed) 

and 

 Momentum reduction  

or deactivation 

NOTE: 

Extended shunting key 

selection in   

CV’s #155, 156 

 

Bit 5 

DC stopping 

Bit 7 

Changing SUSI pins to 

logic level outputs 

Bits  

0 - 4, 6 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Select a function key for  
LOW GEAR ACTIVATION: 

Bit 4  = 1 (and Bit 3 = 0): F3 as half-speed key  
Bit 3  = 1 (and Bit 4 = 0): F7 as half-speed key 

Select a function key for 
MOMENTUM DEACTIVATION: 

Bit 2  = 0 (and Bit 6 = 0): “MN” key for deactivation, 
Bit 2  = 1 (and Bit 6 = 0): F4 key for deactivation 
Bit 6  = 1 (Bit 2 is irrelevant): F3 for deactivation. 

Effect of above key (MN, F3 or F4) on  
MOMENTUM: 

Bit 1, 0  = 00: no effect on momentum  
             = 01: removes momentum of  
                      CV #121 + #122    
              = 10: CV #3 + #4 reduced to ¼. 
              = 11: removes all momentum above. 

EXAMPLES: 

F3 for half speed-key: CV #124 = 16. 

F3 for half speed-key and F4 to remove momentum 
completely: Bits 0, 1, 2 & 4 = 1; that is CV #124 =23. 

F3 for half-speed key and removing momentum: 
Bits 0, 1, 4 &6 = 1; that is CV #124 = 83. 

 

Bit 5 = 1: 

”DC stopping“  

Bit 7 = 0:

 SUSI-interface active 

         

= 1

: FU-outputs active instead of SUSI

#155 

Selecting a function key 

as half-speed key 

0 - 19 

Expanding on the settings of CV #124; if another key is 
required than F3 or F7: 

CV #155: Defines a function key for half-speed activa-
tion (= top speed cut in half).  

If a key is assigned with CV #155, a possible assign-
ment through CV #124 is disabled. 
CV 

#155 = 0 doesn’t mean that the F0 key is assigned 

but rather that the setting in CV #124 is active.  

#156 

Selecting a function key 

for deactivating  

momentum 

0 - 19 

This CV deactivates the configuration for F-keys in CV 
#124 (Bits 2&6) in case they are not satisfactory. The ef-
fects (Bits 0&1) of the momentum don NOT change.  

The assignment of a key for the deactivation of the mo-
mentum is deactivated, if CV 156>0 (i.e.: a key is de-
fined here). Additionally you can suppress the change of 
the lights wen changing direction with Bit 7=1.  

After defining a key with this CV, the momentum deacti-
vation or reduction still needs to be defined in CV #124: 

CV #124, Bit 1, 0: 
             = 00: no effect on momentum  

S

p

ee

d

Dis tanc e

Entering the s top s ec tion.

Des ired s top point

Dec eleration s tarts  at full s peed

Dec eleration s tarts  at les s  than full s peed,

        with “constant stopping distance

train s tops  at des ired point by  automatic ally  reduc ing the  dec eleration 

                                  v aules  ins pite of immediately  s tarted s topping s equenc e.

” programmed as CV # 140 = 11,12,13

          - 

The s ame with dis abled c ons tant s topping dis tanc e,
           train s tops  to early.

S

p

e

ed

Dis tanc e

Entering the s top s ec tion.
(Or s peed regulator turned to s top)

Des ired s top point

Dec eleration s tarts  at full s peed

Dec eleration s tarts  at les s  than full s peed,
        with “constant stopping distance
            - train s tops  at des ired point by  automatic ally  delay ing s tart of brak ing

                  followed by  “normal” progression.

” programmed as CV # 140 = 1, 2, 3

The s ame with dis abled c ons tant s topping dis tanc e,
           train s tops  to early.

Summary of Contents for MX638 Series

Page 1: ...5 3 26 Servo Configuration NOT for MX621 35 4 Feedback Bidirectional communication 36 5 ZIMO SOUND Selection and Programming 37 5 1 The CV 300 procedures 39 5 2 Incremental Programming of sound CV s a...

Page 2: ...7 with 6 pin plug as per NEM651 on 70mm wires 15 x 9 5 x 2 8 mm Non Sound 0 7 A 4 Fu Outputs 2 logic level SUSI DCC MM DC AC MX618N18 Next 18 Decoder Railcommunity Interface Standard RCN 118 MX620 Out...

Page 3: ...3R MX633P22 11 highly flexible wires 120mm for pick up motor and 4 function outputs Sol der pads for 6 additional outputs logic level servo outputs as well as SUSI MX633 with 8 pin plug as per NEM652...

Page 4: ...res MX649R MX649 with 8 pin plug as per NEM652 on 70mm wires MX649F MX649 with 6 pin plug as per NEM651 on 70mm wires MX647L Produced only during Oct 2010 before the MX646 became available MX640 MX642...

Page 5: ...696 231 MX696N 232 MX686 233 MX622 234 MX623 235 MX687 236 MX621 FLM 237 MX633 238 MX820RevA 240 MX634 241 MX686B 242 MX820RevB 243 MX618 244 Roco NextG 245 MX697 246 MX658 247 MX688 248 MX821 249 MX6...

Page 6: ...Page 6 Non Sound Decoder MX618 MX638 and Sound Decoder MX640 MX659...

Page 7: ...Non Sound Decoder MX600 MX638 and Sound Decoder MX640 MX659 Page 7...

Page 8: ...ta FO6 Servo 2 SUSI Clock FO5 Servo 1 Function output FO4 n a n a n a M X 631 B o tto m S id e red black orange gray blue yellow w hite green brow n Right rail Left rail Motor right Motor left Common...

Page 9: ...headlight Rear headlight Motor left Motor right Left rail M X 6 4 0 To p S id e P rogram m ing pads do not t ouch Switch input 1 Switch input 2 5 V 200 mA power supply for small servos i e SmartServo...

Page 10: ...Motor connection 1 Motor connection 2 Ground Left rail Right rail Function output FO Function output FO Index pin Speaker Speaker Front headlight Rear headlight SUSI Data FO8 Servo 2 SUSI Clock FO7 S...

Page 11: ...pos Cap negative same as Ground M X 645P 16 To p S id e w ith P luX 1 6 Program m ing pads do not touch The SUSI outputs can alternatively be used as servo outputs SUSI Data Servo 2 SUSI Clock Servo...

Page 12: ...Page 12 Non Sound Decoder MX618 MX638 and Sound Decoder MX640 MX659...

Page 13: ...tches ON or OFF Such a CV is made up of 8 individual switches called Bits and the group of Bits is known as a Byte which is the CV itself or the switch board if you will On some CV s you can change th...

Page 14: ...ramming This is normally the case CV 144 0 but the programming lock is often activated in many sound projects to prevent accidental changes It is therefore useful to check this CV especially when pro...

Page 15: ...d 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...

Page 16: ...ned by this consist address not the individual address in CV 1 or 17 18 functions are controlled by either the consist address or individual address see CV s 21 22 CV Denomination Range Default Descri...

Page 17: ...V 29 Bit 4 0 3 step curve defined by 3 CV s 1 28 step curve defined by 28 CV s 3 point speed table the lowest highest and medium speed is defined by the Configuration Variables 2 Vstart 5 Vhigh and 6...

Page 18: ...is not recommend ed to set CV 57 to 0 with systems that don t keep track voltage stabilized Instead set this CV about 2V below track voltage i e 140 for 16V CV 57 can also be used as an alternative t...

Page 19: ...es against jerky driving CV 56 55 default 33 77 73 71 147 EMF Extended sampling time 0 255 0 Useful initial test value 20 For Fleischmann motors Values too small cause engine to stutter values too big...

Page 20: ...ration Please send us your test results The Motor Brake This brake is useful for vehicles without worm gears to prevent them from rolling away on inclines picking up speed on declines as well as to pr...

Page 21: ...0 1 Light flashes at switchgear sound Bit 4 1 Accelerates faster and sets sound to high load when regulator is moved quickly to full speed Bit 5 1 Blending of chuff samples CV Denomination Range Defa...

Page 22: ...for speed limits through the signal controlled speed influence CV s 51 55 The values entered to those CV s are also being interpreted in km h CV Denomination Range Default Description 135 Km h Speed...

Page 23: ...ttky diode in parallel in the op posite direction is the usual arrange ment The different voltage drops across the diodes results in an asym metry of about 1 to 2V The direction in which the diodes ar...

Page 24: ...ned in CV 141 independent of the current speed at the start of the braking sequence This method is especially suitable in connection with automated stops in front of a red signal with the help of the...

Page 25: ...vel outputs Bits 0 4 6 0 Select a function key for LOW GEAR ACTIVATION Bit 4 1 and Bit 3 0 F3 as half speed key Bit 3 1 and Bit 4 0 F7 as half speed key Select a function key for MOMENTUM DEACTIVATION...

Page 26: ...A7 FA6 FA5 FA4 FA3 FA2 FA1 Rear light Front light F0 33 1 L fw 7 6 5 4 3 2 1 0 F0 34 1 L re 7 6 5 4 3 2 1 0 F1 35 2 7 6 5 4 3 2 1 0 F2 36 3 7 6 5 4 3 2 1 0 F3 37 4 7 6 5 4 3 2 1 0 F4 38 5 7 6 5 4 3 1...

Page 27: ...o function output rear headlights CV 33 1 and CV 34 8 front white headlights on F0forw and front red taillights on F0rev CV 35 6 both white headlights as well as red taillights in the rear on F1 CV 12...

Page 28: ...0f 15 FO0r Bits 5 7 0 7 0 Bits 0 3 Function output to be switched ON in forward direction provided that both the F and M keys are ON if Bit 7 for the M key CV is 1 otherwise F key ON is sufficient Bit...

Page 29: ...th the help of the function keys F0 General ON OFF and F15 F16 F17 F18 F19 and F20 is to correctly switch the lights in all possible operating conditions of course in both directions This results in t...

Page 30: ...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 especia...

Page 31: ...specific func tion outputs from dim ming as per CV 60 Continuation of CV 114 and FO3 FO4 as direction bit mapping Bits 0 5 and Bit 6 Bit 7 0 0 Continuation of CV 114 Bit 0 function output FO7 Bit 1 fu...

Page 32: ...cts code and the 2 Bit directions code Bits 1 0 00 bidirectional active in both directions 01 active in forward direction only 1 10 active in reverse direction only 2 Bits 7 2 000000xx No effect excep...

Page 33: ...34 have to be set accordingly i e CV 33 13 00001101 CV 34 14 00001110 main ON after the tram comes to a full stop range 0 25 sec 64 Effects modifications 0 255 0 Bit 7 4 define a ditch light key func...

Page 34: ...s 255 Fan receives maximum voltage at start up or accelerations 353 Automatic smoke generator shutdown For STEAM and 0 255 0 106 0 If a smoke generator is controlled by one of the effects 010010xx or...

Page 35: ...128 or 128 Bit 7 in addition to other possibly set bits These logic level outputs are then always regarded as the next normal outputs For example The MX630 comes with a total of 6 function outputs Lf...

Page 36: ...ce to competitors products the ZIMO loco number identification is part of ZIMO DCC decoders since 1997 and as far back as 1990 with ZIMO s own data format which is no longer in use today It can only b...

Page 37: ...eral locomotives in the case of the Sound Collection see below as well as playback instructions in the form of sched ules dependencies on operating condition speed acceleration pitch etc and assignmen...

Page 38: ...ch inputs S1 nothing S2 nothing S3 nothing A sound project is composed of sound samples schedules and CV settings To produce the sound of a locomotive the sound project contains the following componen...

Page 39: ...ine 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 whereas with the engine running the se...

Page 40: ...ed for volume settings during the allocation procedure Depends on entry F1 F19 The function keys have the following special meaning during the selection procedure Drawing of an MX31 display not a phot...

Page 41: ...us or next sound sample etc but F6 still If F6 is active when ending the allocation procedure the sound sample is played as random sound at standstill only default F7 cruise If F7 is active when endin...

Page 42: ...vailable because the system used is not equipped with RailCom the value of a particular CV can only be determined by reading it out on the programming track Although most of the time this is not neces...

Page 43: ...0 Time in tenths of a second for sound fading in out when mute CV Denomination Range De fault Description fade in out time 0 25 sec button is pressed Total range is 25 seconds 0 to 10 minimum time set...

Page 44: ...ion sound F4 526 568 Function sound F5 F19 0 255 0 Volume for function sound F5 F19 674 677 698 volume for sounds on F20 F21 F28 Note The CV s between the above 570 572 513 515 516 518 etc hold inform...

Page 45: ...me chanical valve control This effect can be more or less accentuated with CV 270 CV Denomination Range INC step De fault Description 271 Overlapping effect at high speed 0 255 useful up to 30 1 16 T...

Page 46: ...at high speed non proportional Bit 5 1 Braking even by one speed step causes the motor and turbo sounds to decrease by on sound step CV Denomination Range INC step De fault Description Bit 6 1 Thyrist...

Page 47: ...ith the prototype the increased sound should be noticeable before the increase in speed becomes visible since the latter is a result of the increased steam volume supplied to the pistons It is therefo...

Page 48: ...on sound step Bit 6 1 Thyristor sound volume may increase when braking even if the volume is CV Denomination Range INC step De fault Description supposed to decrease according to CV 357 see CV 357 Bi...

Page 49: ...en driving solo 0 255 0 The diesel motor sound should remain at idle when driving solo with function key defined in CV 347 until the speed step defined in CV 391 is reached 836 Motor Start Sound Bit 0...

Page 50: ...speed step at which a second thyristor CV Denomination Range INC step De fault Description 362 Switchover threshold for second thyristor sound for ELECTRIC engines sound for higher speeds is played ba...

Page 51: ...celeration before the electric brake sound is played back CV Denomination Range INC step De fault Description threshold 385 Electric brake Downhill 0 255 0 0 no effect at negative load 1 255 Sound tri...

Page 52: ...r Z2 0 255 0 255 0 255 20 80 5 By default Z2 is assigned for coal shoveling at stand still 321 322 323 As above but for sound generator Z3 0 255 0 255 0 255 30 90 3 By default Z3 is assigned for the i...

Page 53: ...are less likely to interfere with motor regulations Locomotives with 6 or 8 pin NMRA interface are easy to retrofit with the MX R MX F MX N e g MX630R or MX620F etc They come with the appropriate 8 R...

Page 54: ...of an amplifier module M4000Z is connected with the relevant logic level output sol der pad of the decoder To tra ck Brow n 2 x black Blue G reen e g Smoke generator uncoupler etc M4000Z Connect to SU...

Page 55: ...erface The light bulbs get their power directly from the power pick up The blue wire is still available at the decoder and can be used if re quired but when used on aforementioned bulbs that get power...

Page 56: ...n engines with 22 pin sockets see drawing at left brown area 16 pin In 8 pin yellow and 12 pin equipped locomotives it depends on the available space whether the 16 pin version can be used The MX630P...

Page 57: ...and MX642 to servo and SmartServo motors Two servo connections are provided on the MX640 for commercially available servos and SmartSer vo RC 1 Manufacturer TOKI Corp Japan These are normally the SUS...

Page 58: ...und decoder the following items must may be connected mandatory SPEAKER Any 8 ohm speaker or two 4 Ohm speak ers connected in series can be used Speaker with higher impedance are also allowed but will...

Page 59: ...rom ZIMO MTC like decoders WITH direct capacitor hook up MTC like are all decoder belonging to families containing MTC types even the hard wired versions Capacitors to be connected must be rated at ge...

Page 60: ...resistor between the capacitor and the decoder i e 33 Ohm This prevents any large currents flowing in out of the capaci tor and thereby suppresses the above mentioned undesirable side effects even if...

Page 61: ...oke generator connected to function output FO5 CV 131 72 The selected function output is further defined by CV 137 138 and 139 Definition of smoke gen erator characteristic These CV s must be programm...

Page 62: ...ace layouts on the part of M rklin Trix see CV table Locomotives equipped with C Sinus capable ZIMO decoders can be operated in the NMRA DCC data format as well as the MOTOROLA protocol but not in ana...

Page 63: ...nt of 1 8 A which makes H0 decoders also suitable for smaller large scale vehicles requires less space than real large scale decoders depending on the version they come with a voltage regulator for lo...

Page 64: ...n for 16 V catalytic capacitors or su per caps to 6800 F Dimensions 45 x 15 x 8 mm ADAMTC Adapter boards for MTC 21 decoder ADAMTC without low voltage supply ADAMTC15 or ADAMTC50 with 1 5 or 5 0 V sup...

Page 65: ...s via a MXULF MXDECUP MX31ZL may fail due to the voltage regulator on the adapter board Remedy The decoder must be removed from the board and connected directly to the update module ATTENTION Connecti...

Page 66: ...n original loco board left and the ADAPUS right The function output FO8 is not present at the standardized PluX interface but is nevertheless avail able at the ZIMO MX645 decoder exactly at the same l...

Page 67: ...ced motor regulation 112 36 Motor control frequency set to 40 kHz 124 128 SUSI deactivated both connections are used as logic level function outputs 152 64 FA3 FA4 used for directions bit for the cont...

Page 68: ...8 procedure is NOT standardized and exists only in ZIMO decoders all CV s are reset to the default values as listed in the operating manual regardless of any previously ac tive CV sets or sound projec...

Page 69: ...dure Example To enter a value of 160 which is not possible with a Lokmouse 2 because value is 99 to CV 5 max speed proceed as follows First program CV 7 to 1 followed immediately by setting CV 5 to 60...

Page 70: ...ate the direction switch briefly enter 80 for a value of 0 The headlight flashes once indicating that you can program the next CV or end the pro gramming by turning the track power off Long mode Remem...

Page 71: ...Temporary adaptation of CV 3 Acceleration 3 7 24 Deceleration variation 0 255 0 Temporary adaptation of CV 4 Deceleration Chap ter CV Denomination Range Default Description 25 26 3 10 27 Asymmetrical...

Page 72: ...ch SUSI to function outputs DC braking 3 22 125 126 127 128 129 130 Effects F0 front F0 rear F1 F2 F3 F4 0 255 0 Bits 1 0 00 directional active in both directions 01 only forward 10 only reverse Bits...

Page 73: ...eam engine 186 189 Special pantograph configurations 0 Pantograph settings for special projects 3 22 190 191 Dimming times with effect 88 0 255 Turn ON OFF times for effects 88 89 and 90 3 3 250 Decod...

Page 74: ...or maximum sound volume 0 255 100 5 7 297 Electric motor lowest speed step 0 255 30 Internal speed step at which the motor sound becomes audible Chap ter CV Denomination Range Default Description 5 7...

Page 75: ...thyristor sound volume should be reduced 5 7 358 Thyristor control Volume reduction 0 255 0 Defines a curve as to how the thyristor sound should be lowered at the speed step defined in CV 357 5 7 359...

Page 76: ...The number of speed steps the train s speed has to be reduced within 0 5 seconds in order for the automatic coasting effect to set the motor sound to idle 3 17 399 Rule 17 Speed de pendent headlights...

Page 77: ...ut is turned on 3 17 435 441 447 453 459 465 471 477 483 489 495 501 507 A2 Reverse 0 255 0 Value range 0 1 13 14 15 2 Output to be switched on in reverse direction 0 no output 1 13 FO1 FO13 14 FO0v 1...

Page 78: ...g equipment but the equipment is missing or not wired appropriately Typical cases The light is no longer work ing with F0 because the sound project has redirected the light to another function key or...

Page 79: ...sh 19 Gearbox 18 Half Speed 23 HARD RESET 13 High Low beam 31 HLU High Speed Correction 22 Incremental Programming 43 Input Mapping 31 Load Code 13 LOCO Number ID 17 Loco Type Selection with CV 265 39...

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