Load control
The eMOTION XLS Sound Decoder monitors the driving performance of the locomotive and regulates the
driving voltage. The load control governs the speed of the locomotive regardless of up or down grades or the
length of the train. This means the decoder delivers more voltage to the motor(s) if the locomotive is running
uphill in order to keep the speed constant. The eMOTION XLS Sound Decoder is equipped with a state-of-art
integrated PI-Load Control (proportional-integral) that can be programmed efficiently by 3 CVs. These 3 CVs
define the characteristics of the PI-Load Control by the following parameters: maximum re-adjustment factor
(allowed readjustment per adjustment interval), re-adjustment retardation (frequency of the adjustment
intervals), and maximum re-adjustment strength (maximum re-adjustment to the speed setpoint).
Maximum re-adjustment factor (CV60)
The maximum re-adjustment factor sets the range of change per re-adjustment interval for the motor voltage,
input range is 0 … 255. The larger the value the more aggressive the decoder will react to load changes. In the
most extreme cases the locomotive will overcontrol and tend to drive jerky during load changes.
Re-adjustment retardation (CV61)
The re-adjustment retardation defines how often the eMOTION XLS Sound Decoder is allowed to re-adjust per
second. Increasing the value means an increase of re-adjustments per second. The eMOTION XLS Sound
Decoder is able to perform up to 4000 adjustments per second. The basic setting is “60”. This results in a
leisurely and realistic control characteristic. Formula: 4000/(CV-value) = Number of adjustments per second
eMOTION XLS Sound Decoder 13
Illustration 13: Operating Modes of the PI-Load Control