Multi-Protocol decoder with Load Regulation for DC and Faulhaber motors
Features
• Multi-protocol Load regulated decoder for DCC and Motorola
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Suitable for DC and bell armature motors to 1 A
Quiet motor running by using 18.75 kHz control frequency
14, 27, 28, 128 speed steps, depending on data format
Short addresses (1-127) and long addresses (for 128-9999)
NMRA compliant
Adjustable minimum, maximum and medium speeds
Speed step tables for 14 and 28 speed step mode
Main track programming (DCC)
Shunting mode (half speed) toggled using F3
Starting/brake inertia switched using F4
Headlights switched using F0, dimmable
2 special function outputs switched using F1 and F2, dimmable or time restricted
With SUSI sound interface (4 pole mini socket) for the connection of sound modules or other modules, controllable using auxiliary functions (f1 to f12)
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Produces the address identification for the control of the LISSY of mini transmitter 68 400
Reacts to DCC conforming brake signal or brake sections with DC voltage
Overheating protection, all output are short circuit protected
Conventional DC or AC operation with automatic change
All CV's are programmable with digital devices using DCC and/or Motorola formats
In DCC layouts programmable using register, CV direct or page programming
Updateable using Flash memory
Description
The locomotive decoder 76 420 is a small, efficient multi-protocol decoder. It can be used in
DCC and Motorola systems and operates equally well in analog mode with DC or AC power and direction of travel change-over using high voltage pulse (Märklin system).
The decoder works with a frequency of 18.75 kHz and is not only suitable for DC motors, but also for bell armature motors (e.g. Faulhaber, Maxon, Escap) up to a continuous power of 1 A.
Short term higher switching on current are tolerated well.
The motor characteristics are setup either by means of the minimum, middle and maximum speeds or by different CV's for the individual speeds. The load control can be individually adapted to different locomotive motors by setting these control parameters.
The decoder has two travel direction dependent lighting outputs, as well as two additional special function outputs, which are switched using function keys f1 and f2. Function keys f3 and f4 can be used to switch a shunting mode with extended low-speed operating range and the starting/brake inertia. The allocation of the switching tasks such as lighting, special function outputs, shunting mode and adjustable starting/brake inertia can be freely assigned to the function keys of the digital center (Function Mapping). The decoder is programmable with the Intellibox, DCC and Märklin controllers. All CV's are programmable with these devices.
In the default condition the decoder automatically recognizes the DCC and Motorola data formats, as well as the respective analog mode with DC or AC voltage. The desired operating mode can also be specified manually.
Ex-Factory Setting
Ex-factory the decoder is configured in DCC/Motorola operating mode. It switches between the two formats automatically. Additionally the decoder can be controlled with a DC device or
AC transformer (Märklin System) in analogue 2-rail or 3-rail installations.
Installation of the decoder 76 420
Connection of the decoder
Remove the strapping plug from the locomotive and put the decoder’s interface plug into the vacated socket.
If the lighting does not operate in the correct direction, then you must rotate the plug 180 degrees.
Note: If the driving direction does not correspond to that indicated in the digital center’s display, then you can change this with CV29 Bit 0.
Connection of special functions
Besides lamps for lighting you can also use different items on the special functions outputs, such as smoke generator or Telex-coupling. For travel direction independent switching the outputs can be paralleled.
Additional special functions such as smoke generator, telex coupling or driver compartment lighting can be connected to the special function outputs A1 and A2. The feed to the device is soldered directly to the decoder circuit board. The return line is connected either to the blue wire of the decoder or the locomotive chassis.
Connection of an IntelliSound module or a LISSY mini transmitter 68 400
Alternatively a plug from an IntelliSound module or a LISSY mini transmitter can be inserted into the SUSI interface socket on the under side of the decoder. For controlling a LISST mini transmitter program Bit 1 in CV49 to 1 so that the decoder sends the identification address for the control of the LISSY mini transmitter to the SUSI interface. For operating a sound module on the SUSI-interface Bit 1 in CV49 must be set to 0 (Factory setting).
Mounting the decoder in the locomotive
Use the enclosed double-sided tape to fasten the decoder to any place in the locomotive. The sticking pad protects the decoder against conductive connections and holds it in place reliably.
Examine the correct installation with a continuity tester or an ohm meter. Make sure that the unit is placed in the vehicle where a conducting connection could not develop! Ensure that even after re-assembly of the locomotive no short-circuits occur from jammed wires.
A short-circuit in the area of the motor, lighting, pick-up and wheel contacts possibly destroys the component and electronics of the locomotive!
Digital and analog Operation
On digital layouts the decoder can be controlled in the Motorola or DCC data format. For the
DCC operation 28 speed steps are preset.
If the decoder is used on conventional layouts it can be controlled either with a DC or an AC controller (system Märklin). All operating modes are automatically recognized by the decoder.
Märklin braking section
The decoder reacts to a Märklin brake section (brakes with analog power on the track), if CV29 bit 2 and CV49 bit 7 are set to 1 (factory setting 1 and 0).
Programming
The Configuration variables (CV's) form the basis of all possible operations of the decoder in accordance with the DCC standard. The decoder can be programmed with the Intellibox, DCC controllers and Motorola controllers.
Programming with the Intellibox
We recommend that, irrespective of the data format that will eventually be used, (xthat) the decoder be programmed using the menu for DCC decoders.
The Intellibox supports DCC programming with a user friendly input menu. Long addresses do not have to be calculated laboriously, as they can be entered directly. The Intellibox calculates the values for CV 17 and CV 18 automatically.
For precise instructions please read the appropriate chapter in the Intellibox manual.
Special case locomotive addresses 80 to 255 in Motorola format
In Motorola format the Intellibox supports an address range to 255. Addresses 1 to 80 can also be programmed freely using DCC programming. However if locomotive addresses higher than 80 are to be used, the locomotive address must be programmed according to the chapter
"Programming with a Märklin controller".
After programming is complete CV 1 has a value of 0 and the decoder uses the Motorola address larger than 80.
Programming with DCC devices
Use the programming menu of its DCC controller, to select and program the decoders CV's by register, CV directly or page mode programming. With a DCC controller it is also possible to program the decoder using main line programming. For the exact procedure refer to the controller user manual.
Programming of long addresses without programming menu
If programming is to be done with controllers that do not support programming with an input menu, the values for CV 17 and CV 18 must be calculated. Here is a guide for programming of address 2000.
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Divide the address by 256 (2000/256 = 7 remainder of 208).
Take the integer result (7) and add 192
Program the result (199) into CV 17
Program the remainder (208) into CV 18
Important: Set bit 5 of CV 29 to 1, so that the decoder uses the long address.
Values for calculating the CV value
CV's 29 and 49 can be used to set the decoder into different modes. The value to be programmed is calculated by using the CV and adding the values of the desired functions.
Example
Normal driving direction
28 speed steps
Value = 0
Value = 2
Auto Analog/digital change over Value = 4
Speed steps using CV 2, 5, 6 Value = 0
Short address Value = 0
The sum of all values is 6.
CV 29 preset to this value ex factory.
0 Normal driving direction
Reverse driving direction
1 14/27 speed steps
28/128 speed steps
2 Only digital operation
Automatic analog/digital change over
4 Speed steps using CV2, CV5 and CV6
Characteristics using CV67-CV94
5 Short address (CV1, register 1)
Long address (CV17 and CV18)
Value
0
1
0
2
0
4
0
16
0
32
Programming with a Märklin Center except CS2
(see DCC)
With a Märklin center all CV's can be programmed, but not read.
1. Switch Center off and on.
2. Select the address of the decoder and switch the light on.
3. Operate the direction change-over 5 times in quick succession with the stationary locomotive (speed step 0), until the light turns off.
4. Enter the number of the CV that is to be programmed.
5. Briefly operate the direction change-over. The rear light flashes fast 4 times.
6. Enter the desired value for CV e.g. a locomotive address.
7. Briefly operate the direction change-over. The rear light flashes slowly 4 times.
If further CV's are to be programmed repeat points 4-7.
If programming is to be terminated switch the center to "STOP" or set the address to "80" and briefly operate the direction change-over.
Since a Motorola digital center from Märklin only accepts inputs of 01 to 80, the value "0" must be entered by entering the address as "80".
Page-Register for inputting CV-Numbers greater than 79
CV addresses larger than 79 can only be programmed with the help of the page register,
CV66. If CV66 has a value higher than 0, then the contents of CV66 times 64 will be added to every address entered. The entered value must lie in the range 1 to 64. When leaving
Motorola programming mode the page register (CV66) is automatically reset to zero.
Example
If CV82 is to be programmed with a value of15, then CV66 must first be programmed with a value of 1. Subsequently, CV18can be programmed with a value of 15. The decoder places the value 15 into CV82, which is derived from multiplying the contents of the CV66 (in the example 1) by 64 (thus 64) and then adding the entered CV address (18).
Offset-Register for entering CV values greater than 79
CV values larger 79 can be programmed only with the help of the offset register. The offset register is CV65. If CV65 contains a value > 0, then all following programmed valued are calculated by multiplying the contents of CV65 by 4 and adding the result to the entered value. When leaving
Motorola programming mode the offset register (CV65) is automatically reset to zero.
Example
CV49 is to be programmed with a value of 157, then CV65 must first be programmed with the value of 25. Subsequently, CV49 can be programmed with a value of 57. The decoder places the value 4
* 25 + 57 into CV49.
Note: When programming CV65 and CV66 the contents of the offset and page registers have no effect.
Programming with a Mobile Station
The Programming Menu is available in the Mobile Station‘s Loco Menu, only for certain locomotives. A locomotive which is equipped with a programmable decoder must be selected from the Database. Proceed as follows:
1. Add a new locomotive and select Part No. 36330. The Display then shows locomotive Ee
3/3.
2. Press the "MENU/ESC" button and select the “LOK Change” ("LOK ÄNDERN") column.
Here you will find the last function of Register Programming indicated by "REG". Use this function to change the decoder’s CV's. You can only write to the CV's with this function.
3. Enter the number of the CV and confirm this with the reversing knob.
4. Enter the value for the CV and confirm this with the reversing knob. The Mobile Station then programs the CV with the desired value.
Attention: Before programming, remove all locomotives that are not to be programmed from the track!
Motor Regulation
The motor’s load regulation can be adapted to suit the locomotive with CVs 53 to 58.
Here the individual CV’s have the following purpose:
CV53 Motor regulation repetition rate
CV54 P constant for the PID regulator
CV55 I constant for the PID regulator
CV56 Regulation frequency
CV57 D constant for the PID regulator
CV58 Length of the time slot for measuring the back EMF voltage
Guide for changing the controller parameters P,I,D:
1.) Set CV54, 55 and 57 with factory setting of the decoders CV2, 5 und 6 (min., max. and middle Speed).
2.) Set CV55 and 57 to zero
3.) Set CV54 so that the locomotive just moves on speed step 2.
4.) Increase CV55 so that the locomotive moves off quickly, as desired, when changing the speed step from 0 to 1. (The step size should be 1.)
5.) Jerky behaviour with the change of speed step can be compensated for in CV57. (The step size should be 1.)
6.) If necessary adapt CV2, 5, 6 from step 2.) and start over with the adjustments.
If no satisfactory result can be obtained then you must a) change the regulation repetition rate in CV53. b) Increase the measuring time for the back EMF voltage in CV58. (With some motors smooth running can only be achieved at low speed in this way.) c) reduce the regulation frequency in CV56. (this is valid when the locomotive already runs at top speed at a speed step lower than the maximum and after no further change in speed occurs)
Make the respective changes to CV53, 56, 58 in small increments and if necessary repeat the
PID regulation in points 1.) to 6.).
Table of CVs (Configuration Variables)
CV Description
1 Locomotive address
Value range
DCC 1-127
Mot 1-80
Default value
3
1-63 1
1-63 2
2
3
4
5
6
7
Minimum Speed
Acceleration
1 means that every 5 ms the actual speed is increased by 1
If the internal maximum speed is set to 200 (CV5=50 or CV94 = 200), then acceleration time from 0 to Fmax is 1sec.
Braking inertia (time factor CV3)
Maximum speed (must be greater than CV2)
Middle speed (must be greater than CV2 and less than CV5)
Software version (The processor can be updated)
8
17
Manufacturer ID
Long locomotive address
18 17 = high byte / 18 = low byte
19 Consist address (double traction)
0 = Consist address inactive
When bit 7=1 the driving direction is reversed
The desired speed CADR + 128 = reverse direction
29
33-42
Configuration for DCC
Bit 0=0
Bit 0=1
Bit 1=0
Bit 1=1
Bit 2=0
Bit 2=1
Bit 3
Bit 4=0
Bit 4=1
Bit 5=0
Bit 5=1
Normal direction reversed travel
14 speed steps
28 speed steps
Only digital operation automatic analog/digital switching
Not used
Speed steps using CV 2, CV 5, and CV 6
Characteristics using CV 67 to CV 94
Short address (CV 1)
Long address (CV 17/18)
Value
0 *
1
0
2 *
0
4 *
-
0 *
16
0 *
32
Bit 6/7 Not used
Allocation of the function outputs, which are to be activated with function keys like light and special functions
CV33
CV34
Light operation forwards
Light operation backwards
CV35
CV36
CV37
CV38
CV39
CV40
CV41
CV42
Function key f1
Function key f2
Function key f3
Function key f4
Function key f5
Function key f6
Function key f7
Function key f8
1-63
1-63
1-63
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2
48
24 varies
- 85
1-9999 2000
199-231/0-255 199/208
1-127 0
0-255 6
0-63
1
2
4
8
16
32
0
0
0
0
Assignment of the individual Bits
Bit 0
Bit 1
Bit 2
Bit 3
Bit 4
Light output front
Light output back
Special function A1
Special function A2
Shunting mode
Bit 5 Start/brake inertia
47 Speed correction forwards
1
2
4
8
16
32
48 Speed correction reverse
49 Locomotive decoder configuration
Bit 0=0
Bit 0=1
Bit 1=0
Bit 1=1
Bit 2=0
Bit 2=1
Bit 3=0
Bit 3=1
Bit 4=0
Bit 4=1
Bit 5=0
Bit 5=1
Bit 6=0
Bit 6=1
Bit 7=0
Bit 7=1
Motor load regulation On
Motor load regulation Off
SUSI configured for Sound module
SUSI configured for LISSY Mini transmitter brakes to 0 in brake section brakes to speed step in CV52
Data format DCC and Motorola
Data format only DCC
Data format DCC and Motorola
Data format only Motorola
Dimming for A1 and A2 Off
Dimming for A1 and A2 On
Light outputs not swapped
Light outputs swapped
Brake only with brake signal
Brake with analog potential
8
0 *
16
0 *
32
0 *
64
0 *
128
Value
0 *
1
0 *
2
0 *
4
0 *
0-63 32
0-63 32
0-255 32
Attention: When the Motorola data format is selected by Bit 3 and the DCC data format by Bit 4, the decoder no longer receives speed commands and can only be programmed.
50 Dimming of Function outputs A1, A2 and Light outputs 0-63
51 Configuration of analog operation 1-3 3
1 = only AC operation, 2 = only DC operation
3 = AC and DC operation with automatic recognition
52 Final speed in a braking section 0-255 30
CV Description
53 Motor regulation repetition rate
54 Motor regulation P Constant
56 Motor regulation I Constant
56 Regulation Frequency
57 Motor regulation D Constant
58 Time slot for AD transducer measurement
59 Reset to factory defaults
If this CV is set to 1, the decoder will be returned to factory setting.
60 Short circuit monitoring
0 = inactive, 9 = active (do not change)
61 Shutdown temperature in °C
0 = Temperature monitoring Off
65 Offset-Register
For CV Programming with a Motorola center
66 Page Register
For CV Programming with a Motorola center
67-94 Characteristic curve for speed steps 1-28
98 Timed switching of Outputs A1 and A2
0 = A1 and A2 have timed restriction
1 = A1 has timed switching
2 = A2 has timed switching
3 = A1 and A2 have timed switching
99 Length of the time switching
In 100ms: A value of 10 represents 1 second
115 LISSY Train catagory
Technical Data
Addresses: 1-9999 (long DCC address)
Max. current consumption/loading: 1 A*
Value range
Default value
0-63 35
0-63 20
0-63 10
0-63 32
0-63 12
0-63 2
0, 1 0
0, 9 9
0-255 varies
0-255 0
0-255 0
0-255 varies
0-3 0
0-255 0
1-4 1
Function outputs:
Size:
1 A each
22 x 12.5 x 5.5 mm
The decoders is preset to address 03, and 28 speed step mode and can be used and programmed in DCC- and Motorola data format.
* The constant loading capacity may vary after installation.
Guarantee declaration
Each component is tested for its complete functionality before distribution. If a fault should arise within the guarantee period area of 2 years, we will repair the component free of charge upon production of proof of purchase. The warranty claim is void if the damage was caused by inappropriate treatment.
Please you note that, according to EMV law, the component may only be installed in vehicles which carry the CE logo.
The trade names mentioned are registered trade marks of the respective companies.
Our contact Details:
We are available if you have any questions!
Internet: FAQs are found at www.uhlenbrock.de
E-Mail: [email protected]
Hotline: +49 (0) 2045 8583-27, Wed 16:00~18:00
and Mon - Tue - Thu – Fri, 14:00~16:00
Service: In the event of a defect or failure send the unit together with the invoice and a short description of the fault back to us for repair.
Uhlenbrock Elektronik GmbH
Mercatorstr. 6
D-46244 Bottrop
Made in Germany
Electronic devices do not belong in household rubbish
Part No. 76 420
