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Tsunami2 Digital Sound Decoder. Diesel Manual - part 16

Advanced Programming

Tsunami2 Diesel User’s Guide

Example: Motor Speed Step Deadband and Automatic Whistle Signals

Refer to the following example to configure automatic forward-driving and reverse-driving
whistle signals using CV 216:

1. To enable automatic forward-driving whistle signals, set CV 1.407 (Forward Whistle Signal

Auxiliary Map Register) to a value of 1.

2. To enable automatic reverse-driving whistle signals, set CV 1.408 (Reverse Whistle Signal

Auxiliary Map Register) to a value of 2.

To allow forward-driving and reverse-driving whistle signals to be issued after the throttle is
increased from zero and before the locomotive begins to move, set CV 216 to a value of 3.
The locomotive will begin to move when the throttle is increased from speed-step 3.

Enabling Back-EMF and Auto-Stop

CV 217 (Motor Control Register) is used to enable back-EMF for smooth Hyperdrive2 motor
control and the auto-stop features. Back EMF is enabled by default to better regulate the
operation of the motor. Disabling back-EMF control will deactivate all back-EMF regulated
automatic features including Dynamic Digital Exhaust and constant brake distance.

The auto-stop feature is also enabled by default to provide smoother operation during sudden
changes in direction of travel. Auto-stop will bring the locomotive to a stop for 500ms before
changing direction. Disabling this feature will cause the model to change directions instantly
when the direction button is pressed on your throttle.

Setting the Constant Braking Distance

CV 220 determines the fixed distance over which the locomotive will decelerate to a stop after
setting the throttle to zero. Constant Brake Distance allows the train to be stopped in a set, fixed
distance regardless of speed.

Entering a value from 1 to 255 into CV 220 will adjust the constant brake distance from
minimum to maximum. Entering a value of 0 into CV 220 will disable the constant brake
distance feature, as will disabling Back-EMF in CV 217.

The constant brake distance feature is only activated when the throttle is set to speed step 0.
The value entered in CV220 is a portion of available stopping distance, not a unit of time or
distance. Each model may require different values in CV220 to obtain the same stopping
distance due to difference in gear ratios, motor RPMs and driveline disparities.

The feature works best with CV3 (Baseline Acceleration Rate) and CV4 (Baseline Deceleration
Rate) are set to values greater than 0. This added momentum allows the throttle to be quickly
reduced to speed step 0, enabling the constant brake distance feature, while the locomotive
continues to travel at speed.

When activated, the feature will override all braking rates set in CV116, CV117 and CV118
along with the Baseline Deceleration Rate in CV4. Any throttle increase in from speed step 0 will
turn off the feature and the locomotive will accelerate back to the desired speed step set by the
throttle.

Advanced Programming

Tsunami2 Diesel User’s Guide

Configuring Advanced Consist Operation

A consist is made up of several units that are coupled
together to operate as a complete train. In model railroading,
“Advanced Consisting” means that the decoder is used to
configure the consist, instead of the command station.
Consists allow an easy way for a single operator to run a
multi-unit diesel lash-up, for example. You can use advanced
consist CVs

to determine the decoder’s consist address, set

consist acceleration and deceleration rates, enable function
keys F0-F28, and configure automatic effects.

Setting the Consist Address

Entering a value from 1 to 127 into CV 19 (Consist Address) will set the consist address from 1
to 127 for all units in the forward direction. Entering values from 129 to 255 into CV 19 will set
the consist address from 1 to 127 for all units in the reverse direction (more common in diesel
operations). Because the consist address is specific to direction, ensure all units are correctly
oriented. Entering a value of 0 or 128 into CV 19 will disable the consist address.

After setting the consist address, the decoder will still respond to the active primary or extended
address for all commands except speed and direction data. The decoder will not recognize
programing commands sent to the consist address in Operations Mode, and will only respond to
programing commands sent to the decoder’s primary or extended address.

Enabling Consist Functions

CV 21 (Consist Function Enable 1), CV 22 (Consist Function Enable 2), CV 245 (Consist
Function Enable 3), and CV 246 (Consist Function Enable 4) allow you to enable functions for
advanced consist operation when a valid consist address is active in CV 19.

Note: You can enable the effects mapped to function keys in CVs 1.257-1.384 (Effect Map
Registers) for advanced consist operation with CVs 21, 22, 245, and 246

. Refer to “Using

Tsunami2

” to default function assignments for F0-F28, and refer to “Configuring Function

Mapping” to customize Flex-Map function mapping CVs.

Follow the steps on the next page to enable functions for advanced consist operation.

Advanced Consist CVs
CV 19: Consist Address
CV 21: Consist Function Enable 1
CV 22: Consist Function Enable 2
CV 23: Consist Acceleration Rate
CV 24: Consist Deceleration Rate
CV 245: Consist Function Enable 3
CV 246: Consist Function Enable 4
CV 247: Consist Function Enable 5

Advanced Programming

Tsunami2 Diesel User’s Guide

Consist Function Enable 1-4

The following procedure details enabling effects mapped to F0(f), F0(r), and F1-F28 for
advanced consist operation:

1. Circle the CV values associated with your preferred F0-F28 function keys.

2. For each CV, add the values together and record the sum in the space provided. You

should have four total CV values for enabling your preferred function keys when finished.

3. Enter each value into CVs 21, 22, 245, and 246 to enable your preferred functions for

advanced consist operation.

CV 21: Consist Function Enable 1

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Function

CV Value

128

CV 21 Value = _____

CV 22: Consist Function Enable 2

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Function

F12

F11

F10

F0(r)

F0(f)

CV Value

CV 22 Value = _____

CV 245: Consist Function Enable 3

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Function

F20

F19

F18

F17

F16

F15

F14

F13

CV Value

128

CV 245 Value = _____

CV 246: Consist Function Enable 4

Bit 7

Bit 6

Bit 5

Bit 4

Bit 3

Bit 2

Bit 1

Bit 0

Function

F28

F27

F26

F25

F24

F23

F22

F21

CV Value

128

CV 246 Value = _____

Advanced Programming

Tsunami2 Diesel User’s Guide

Setting Consist Momentum Rates

CVs 23 (Consist Acceleration Rate) and 24 (Consist Deceleration Rate) are used to set the
acceleration and deceleration rates for consists when a valid consist address is active. Like
CV 3 (Baseline Acceleration Rate) and CV 4 (Baseline Deceleration Rate), CVs 23 and 24 are
used to determine the time it will take the consist to accelerate to full speed from a stop and
come to a stop from full speed. Values from 0 to 255 may be programmed into each CV, though
they are interpreted by the decoder as values from -127 to +127. Furthermore, values from 0 to
127 are interpreted as 0 to +127, whereas values from 128 to 255 are interpreted as 0 to -127.

Consist acceleration and deceleration values from -127 to +127 are then added to the baseline
acceleration and deceleration rates. In other words, the value of CV 23 is added to the value of
CV 3 to create the consist acceleration offset, and the values of CVs 24 and 4 are added to
create the consist deceleration offset. For example, if the value of CV 3 is 100, programming
CV 23 with a value of 200 would adjust, or offset, the consist acceleration rate by -73, making
the combined value of CVs 3 and 23 equal to 27.

When the sum of CV 23 and CV 3 equals 255, it will take approximately 3.8 minutes for the
consist to accelerate to full speed from a complete stop. Likewise, when the sum of CV 24 and
CV 4 is 255, it will take 3.8 minutes to come to a complete stop from full speed. Programming
values of 0 and 128 into CV 23 and CV 24 will have no effect on acceleration or deceleration.
Also, if the sums of CVs 23 and 3 as well as CVs 24 and 4 are each equal to 255, programming
CVs 23 and 24 with positive values will not change the consist acceleration or deceleration rate
because CV registers cannot contain values exceeding 255. Similarly, if CVs 3 and 4 are set to
0, programming CVs 23 and 24 with values from 128 to 255 (0 to -127) will have no effect
because CV registers cannot contain negative values.

Enabling Consist Automatic Effects

To provide more versatility, CV 247 (Consist Function Enable 5) can be used in conjunction with
Flex-Map function mapping CVs to allow automatic effect configuration for advanced consist
operation. Automatic effects will respond to direction and movement when enabled. Table S
shows the CV values for configuring effects to respond according to the following
circumstances:

Forward-Driving: Effect is turned on when
the consist is moving in the forward direction.

Reverse-Driving: Effect is turned on when
the consist is moving in the reverse direction.

Forward-Standing: Effect is turned on when
the consist is stopped in the forward direction.

Reverse-Standing: Effect is turned on when
the consist is stopped in the reverse direction.

Emergency Stop: Effect is turned on when
the consist receives an Emergency Stop
command.

Note: CV 247 can be set to allow any
combination of auto-effect enable. For
instance, a value of 10 will allow the effect to
turn on in the reverse direction regardless of
movement, and a value of 3 will allow the
effect to turn on when the consist is in motion regardless of direction.

Table S. CV 247 Auto-Effect Enable

CV Value Active When

Never Active - Disabled

Forward-Driving

Reverse-Driving

Driving

Forward-Standing

Forward

Forward-Standing, Reverse-Driving

Forward, Reverse-Driving

Reverse-Standing

Reverse-Standing, Forward-Driving

Reverse

Reverse, Forward-Driving

Standing

Standing, Forward-Driving

Standing, Reverse-Driving

Continuously Active

Emergency Stop Button pressed

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