With
DCC, you can program Momentum - to make the decoder simulate a loco
pulling a heavy load. Each decoder can have it's own amount of momentum,
and momentum can be modified on the fly if your system and decoder
supports OPS-Mode Programming. When
a loco is MU consisted to another address, momentum may be set differently,
keeping them from accelerating or decelerating equally. For this you
have two options: 1) you can change the momentum settings in one or
more of the locos to make them accelerate and decelerate together,
2) you can program the DAC Momentum Trim CVs.
The advantage of using the DAC Momentum
Trims is that you don't have to remember what the original trim was
before you MUed the locos together, and (if you MU these locos together
on a regular basis) you don't have to remember what the proper trim
value is for each loco when they are MUed together.
You have two ways to use DAC Momentum
Trim: 1) to augment the momentum programmed into CVs 3 and 4, or
2) to turn momentum off all together. DAC Momentum Trim adds to or
subtracts from the values in the regular Momentum CVs. With them,
you can add to or subtract from one or the other to make them be the
same. Or, you can subtract so much from them that it will in effect
cancel out any momentum programmed into the regular Momentum CVs.
Any time the subtraction amount goes below zero, the decoder assumes
a value of zero.
The beauty of the whole thing is
that it works automatically when using
Decoder-Assisted Consisting. When a loco is MUed via DAC, the
DAC Momentum Trim is automatically added to or subtracted from the
regular Momentum CVs. It does not work when consisting via Command
Station Consisting. |
