Basic Programing
Tsunami2 Electric User’s Guide
21
Calibrating DDE Load Compensation
Tsunami2 features a cutting-edge new version of our already revolutionary Dynamic Digital
Exhaust! We highly recommend you automatically calibrate Dynamic Digital Exhaust settings
before adjusting throttle and braking control CVs. This will create an amazingly accurate
representation of prototypical operation. Although traction motor sound effects respond to the
demand on the motor by default, you can automatically calibrate DDE according to the specifics
of your installation and model. This will allow the decoder to produce more prototypical traction
motor responses when encountering changes in both grade and number of cars, during
operation. To adjust all DDE settings provided by Tsunami2, refer to “Configuring Dynamic
Digital Exhaust.”
Follow the steps below to automatically calibrate DDE load compensation:
1. Ensure CV 31 (CV Index 1) is set to a value of 16 (default).
2. Enter a value of 2 into CV 32 to select Indexed CV Page 2. This allows you to adjust
DDE control CVs by accessing CVs 2.503-2.512 from your command station.
3. Set CV 512 (DDE Load Sensitivity) to a value of 16.
4. We suggest running the locomotive at a moderate speed for a minute or two before
continuing. If there is any build-up of lubrication or oil in the motor, this will provide better
results during the calibration procedure.
5. Set the throttle to speed-step 1.
6. When your locomotive is on level track, enter a value of 255 into CV 503 (DDE Load
Offset) to automatically calibrate the nominal low-speed load level.
7. Increase the throttle to an appropriate moderate speed for your layout (generally
between speed-step 25 and speed-step 40).
8. When your locomotive is on level track, enter a value of 255 into CV 504 (DDE Load
Slope) to automatically calibrate the nominal high-speed load level.
Note:
If, after the calibration is complete, you feel the need to increase or decrease the
sensitivity, you can do this with CV 2.512.
Setting Braking Rates
Although you can activate the independent brake and train brake
sound effects with function keys by default, CV 117
(Independent Brake Rate), and CV 118 (Train Brake Rate) allow
you to use the independent brake and train brake functions (F11)
to reduce locomotive speed and simulate actually applying
brakes during operation. We recommend setting CV 3 (Baseline
Acceleration Rate) to a minimum value of 45 before setting
braking rates to allow for smoother operation when the brakes
are applied and released.
The values of CVs 117 and 118 are added to the value of CV 4 (Baseline Deceleration Rate)
and determine how quickly your locomotive decelerates when brakes are applied. Enter values
from 0 to 127 into CVs 117 and 118 to set longer braking rates, and enter values from 129 to
255 to set shorter braking rates. The independent brake and train brake functions will not
reduce locomotive speed when CVs117, and 118 are set to values of 0 or 128.
Note: When consisting with active momentum and braking rates, ensure the values of CVs 3, 4,
117, and 118 are the same for all units.
Braking Rate CV Values
0 = CV 4 + 0 (Disabled)
1 = CV 4 + 1
↓
127 = CV 4 + 127
128 = CV 4 + 0 (Disabled)
129 = CV 4 – 1
↓
255 = CV 4 – 127