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Example 1:
Let's assume, you want to use the Intellibox DCC with
128 speed steps and analogue detection should be
active (because you want to control some locos in
analogue mode). All other options are turned off. CV
29 shows the value 6 (0 + 2 + 4 + 0 = 6).
Example 2:
You want to turn the volume of the decoder down.
Set CV 63 to a value between 1 and 64, let's say 25.
5.2 Important settings of LokSound
Details of the most important CVs may be found in
chapter 5.2. Please study these instructions carefully
before you do any program changes.
Careful deliberation will help you to find the optimal
settings to achieve the desired effects with your
LokSound decoder.
5.2.1 Back EMF control (load control)
LokSound decoders utilize fourth generation load
control assuring constant speed regardless of the
actual load, when using DC motors. Load control was
optimized and tested with motors from:
• ROCO®,
• Bachmann (Liliput),
• BRAWA®,
• Märklin®,
• LGB,
• Bühler,
• Mabuchi.
Load control may be deactivated (if so desired).
Please note that load control is always turned off when
using AC motors – no matter what settings are used.
AC motors are not suitable for load control
user manual LokSound / LokSoundXL V3, 1st edition, 07/2004
load control
How to switch on load control
Set the first bit of CV 49. Read out the CV: load
control is deactivated if the value is 0 or 2. To activate
it, just add 1 to the actual value and enter. Example:
CV 49 reads 2. To activate load control set CV 49 to 3.
You find a detailed description of all possible values
for CV 49 in chapter 7.1.
Parameters of Back EMF control
The internally used PI-control algorithm of Back EMF
control depends on 3 parameters: the control
reference voltage is stored in CV 53, the control
parameters are in CVs 54 and 55.
Reference voltage:
In CV 53 you set the voltage that should come back
from the motor.
This value depends on the track voltage and the
coefficient of utilization of the motor. A coefficient
of 75 % and a track voltage of 16 Volts adds up to a
voltage of 16 V * 75 % = 12 Volts. That value has to
be written into CV 56. The voltage (here: 12 V) may
be entered in 0.25V-increments. This results in a value
of 30 (12V * 2.5) for CV 53. If you don't know the
exact motor coefficient you may obtain the value
experimentally as follows:
Check, if the engine really reaches top speed at the
highest speed step or if you cannot detect any speed
changes at the maximum speed step. In the latter
case you have to reduce the value for CV 56, in the
first case increase the value. The internal PI-regulation
of LokSound can be adjusted with CV 54 and CV 55.
Depending on the type of motor the parameters may
have to be adjusted to achieve optimal running
performance.
LokSound decoders are factory pre-set for the use
with ROCO®-, Brawa®- or Kato motors.
Parameter 'K", stored in CV 54, influences how
strongly load control will effect the driving
performance. The higher the value, the more load
control will respond to any changes. Adjust this value
with care, because too high values could lead to
irregular and „hard" driving performance. If you prefer
smooth running try to reduce the value step by step
until you reach an optimum.
1 7
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