Inc Sound Module Decoder - Manual

www.digitrax.com- 48 -

CV56 controls the dynamic compensation or how much the decoder consid-

ers the historical difference between the current speed and the target speed

when determining the next speed command to send to the motor. This set-

ting is like a damper or shock absorber on the spring that helps to restore the

spring to its new position. CV values can range from 000 to 255. Higher values

cause more rapid adaptation to the target speed and lower values cause slower

adaptation to the target speed. The factory default setting for CV56 is 048. It

will have no effect on decoder operation until you program CV57 as described

below. Excessively high CV values programmed to CV56 will tend to let the

locomotive “hunt” around a new desired speed when a change of speed is com-

manded. We recommend that you use the lowest CV value in CV56 that gives

the desired performance.

CV57 controls the amount of back EMF (intensity) or speed loss as load is

increased, by limiting the amount of change or compensation that the decoder

is allowed to implement. CV57 controls the back EMF separately for regular

addresses and advanced consist addresses.

Table VIIIa: CV57 Values To control the amount of Back EMF

Amount of

Back EMF (ap-

proximate)

Value to add single unit Value to add for

advanced consists

O 00 00

7% 1 16

14% 2 32

20% 3 48

27% 4 64

33% 5 80

40% 6 96

47% 7 112

53% 8 128

60% 9 144

67% 10 160

73% 11 176

80% 12 192

87% 13 208

93% 14 224

100% 15 240

If either digit is 00, speed stabilization is OFF. A value of 015 is speed stabili-