CV 189: Difference between revisions

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(Created page with "{{Infobox |title = NMRA CV 23 |header1 = Consist Acceleration Adjustment |label2 = Range of Values |data2 = 0-255 |label3 = Default Value |data3 = 0 }} == NMRA CV 23 - Consi...")
 
 
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{{Infobox
{{Infobox
|title = NMRA CV 23
|title = NMRA CV 189
|header1 = Consist Acceleration Adjustment
|header1 = Dynamic Brake Min. Speed
|label2 = Range of Values
|label2 = Range of Values
|data2 = 0-255
|data2 = 0-126
|label3 = Default Value
|label3 = Default Value
|data3 = 0
|data3 = 10
}}
}}


== NMRA CV 23 - Consist Acceleration Adjustment ==
==NMRA CV 189 - Dynamic Brake Min. Speed==
This CV contains additional acceleration rate information that is to be added to or subtracted from the base value contained in Configuration Variable #3. This CV will only affect the momentum when CV19 is a non-0 value, meaning the decoder is configured for advanced consisting. The total momentum value can be calculated using the following formula:
Since [[{{NAMESPACE}}:Dynamic_Brakes|Dynamic Brakes]] lose braking power at low speed this CV can be used to simulate that. The locomotive won't go below the speed (0-126) in this CV when the dynamic brakes are applied.
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([the contents of CV#23] multiplied by [0.896]) divided by (number of speed steps in use)
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''' See Also '''
This is a 7 bit value (bits 0-6) with bit 7 being reserved for a sign bit (0-add, 1-subtract). The product of this formula is added to the value in CV 3. In case of overflow (CV23 + CV3 > 255), the maximum acceleration rate shall be used (255). In case of underflow (CV3 + (-)CV23 < 0) no acceleration shall be used (0). The expected use of this configuration is for changing momentum to simulate differing train lengths/loads. Consisted/MU's tend to pull/push more cars, and therefore can have simulated higher loads by using this configuration.
 
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*[[{{NAMESPACE}}:Dynamic_Brakes|Dynamic Brakes]]
*[[{{NAMESPACE}}:CV_190|Dynamic Brake Deceleration Rate]]
*[[{{NAMESPACE}}:CV_191|Dynamic Brake Speed Decrement]]
 
[[Category:Dynamic_Brakes]]

Latest revision as of 18:29, 5 August 2025

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NMRA CV 189 - Dynamic Brake Min. Speed

Since Dynamic Brakes lose braking power at low speed this CV can be used to simulate that. The locomotive won't go below the speed (0-126) in this CV when the dynamic brakes are applied.

See Also

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