Programming Uhlenbrock DCC decoders
Uhlenbrock DCC decoders can be programmed with every DCC Command Station featuring
Register, CV (direct) or paged programming.
Programming DCC decoders with the Intellibox
The Intellibox features an easy to use menu for programming DCC decoders. This menu also
supports the programming of long addresses without having to perform complicated computations
by hand. In fact, one can directly type a long address and have the Intellibox automatically
perform the computations needed in order to find out what values to write into CV #17 and CV
#18. The Intellibox shall also write those values into CV #17 and CV #18, as well as enabling long
addresses by setting Bit #5 of CV #29. Please refer to the corresponding chapter of the Intellibox
manual for more information on this point.
How to compute the value to be programmed into CV #29 (Register #5)
CV #29 (Register #5) is used to configure the decoder. One can for example invert the loco driving
direction (as well as its directional lights) or change the number of speed steps. It is possible
to configure the decoder for digital-only operation or for mixed (and automatic) analog/digital
operation. Finally, one can tell the decoder to react to commands sent to either the short address
(CV #1) or to the long address (CV #17/18).
You can use the Value column of the following table in order to compute by summation the value
to be written into CV #29 (or Register #5) in order to obtain the desired decoder configuration.
Example (if not using Bit programming):
Normal driving direction value =0
14 speed steps
value =0
autom. analog/digital
value =4
short adress
value =0
The sum of all of these values gives 4.
This is the value to program into CV #29 (or
Register #5) - and, this value happens also to be
the factory default value for CV #29.
Function
Normal driving direction
opposite driving direction
14 / 27 speed levels
28 / 128 speed levels
Digital mode only
Automatic analog or digital operation
Short address (CV #1, Register #1)
Long address (CV #17 und CV #18)
Value
0
1
0
2
0
4
0
32
BIT
0
1
2
5
Programming a long address without using a menu
If you have to program the decoder for operation on a long address and you are
not
using a
Command Station which makes this process automatically, then you have to compute what value
to write into CV #17 and CV #18. Well now show by example what to do using long address 2000.
Divide the choosen long address by 256 (here 2000/256 = 7 with a remainder of 208).
Take the integer quotient of that division (7 in our example) and add 192 to it.
Write the result of this addition (7+192 = 199) into CV #17.
Write the remainder of the division (208 in our example) into CV #18.
Important
: make sure that Bit #5 of CV #29 is set to 1, so as to tell the decoder to react to
commands sent to its long address (CV #17/18) and not to commands sent to its short address.
Register Table
Description
Decoder (short) address
Minimum speed
at speedstep 2
Acceleration delay
1 = no delay, 255 = max. delay
Deceleration delay
1 = no delay, 255 = max. delay
Decoder configuration
Check chapter on decoder configuration/CV #29
Page Register
Used during paged programming
Maximum speed
at highest speedstep
Manufacturer id
for Uhlenbrock Elektronik GmbH
Register-Nr.
1
2
3
4
5
6
7
8
Allowed range
1-127
1-31
1-255
1-255
see CV29
-
1-95
-
Value
3
5
2
2
4
-
90
85
