SoundTraxx Tsunami Steam Technical Reference
Tsunami® Digital Sound Decoder
Technical Reference
Software Release 1.00
Rev.C 3/13/14
Notice
The information in this document is subject to change without notice.
SoundTraxx (Throttle Up!) shall not be liable for technical or editorial errors or omissions contained herein; nor for incidental or consequential damages resulting from the furnishing, performance or use of this material.
This document contains information protected by copyright. No part of this document may be photocopied or reproduced in any form without the
prior written consent of Throttle Up! Corp.
Product names mentioned herein may be trademarks and/or registered trademarks of their respective companies.
SoundTraxx and Tsunami are registered trademarks of Throttle Up! Corp.
SoundTraxx DCC, Digital Sound Decoder, Dynamic Digital Exhaust, Auto-Exhaust and Hyperlight are trademarks of Throttle Up! Corp.
Primary CVs
Bit 7 Bit 0
CV 1
Primary Address Control
Description
Contains the decoder’s primary address between 1 and 127:
0 A6 A5 A4 A3 A2 A1 A0
Bit 0-6: A0-A6, Decoder Address
Bit 7: Not used. Must be set to 0!
The decoder will process all valid instruction packets containing an address
that matches the value contained in this register when CV 29, bit 5 is set to 0.
Programming this register with a new value will automatically clear the
Consist Address (CV 19) to 0 and clear the Extended Address Enable bit in
CV 29 (bit 5).
The decoder will ignore commands that attempt to program this register with
values outside the range of 1 to 127.
Note that CV 1 can only be changed in operations mode if the extended
address is enabled.
Default Value: 3
Related CVs: See also CV 29, Consist Address, Extended Address
Tsunami Technical Reference Page 1
CV 2
Bit 7 Bit 0
Vstart
Primary CVs
Description
Vstart denes the initial voltage level applied to the motor at speed step 1 as
a fraction of available supply voltage:
D7 D6 D5 D4 D3 D2 D1 D0
D0-D7: Motor Start Voltage
Vstart may contain any value from 0 to 255. The starting voltage applied to
the motor may be computed as:
Starting Voltage = Supply Voltage X CV2÷255
where CV 2 is the contents of the Vstart register. A value of 0 corresponds to
a zero starting voltage. A value of 255 corresponds to the maximum available
voltage (100%).
For speed steps greater than 1, the DSD will continue to sum the initial
starting voltage level into the throttle computations which has the effect of
offsetting all points on a given speed curve by the level set by Vstart as
illustrated in the gure below.
100%
Vstart = 20
75%
50%
MOTOR VOLTAGE
25%
0%
0 2 4 6 8 10 12 14 16 18 20 22 24 28
SPEED STEP
Default value: 0
Vstart = 0
Tsunami Technical Reference Page 2
Primary CVs
Bit 7 Bit 0
CV 3
Baseline Acceleration Rate
Description
Contains a value between 0 and 255 that sets the decoder’s acceleration
rate:
D7 D6 D5 D4 D3 D2 D1 D0
D0-D7: Baseline Acceleration Rate
Acceleration rate may be computed as:
seconds/speed step = CV 3 x 0.896÷Number of speed steps
When this CV is set to 0, the locomotive speed will respond nearly instantly
to increases in the throttle setting, equivalent to no momentum. When set to
255, it will take approximately 3.8 minutes to accelerate to full speed from a
standing stop.
It is recommended that this CV be set to a nonzero value when operating the
DSD in 14 or 28 speed step modes as the throttle will interpolate between
speed steps during acceleration to produce a smoother overall response.
Default value: 0
Related CVs: See also Baseline Braking Rate, Consist Acceleration
Rate, Consist Brake Rate.
Tsunami Technical Reference Page 3
Primary CVs
Bit 7 Bit 0
CV 4
Baseline Braking Rate
Description
Contains a value between 0 and 255 that sets the decoder’s braking rate:
D7 D6 D5 D4 D3 D2 D1 D0
D0-D7: Baseline Braking Rate
Braking rate may be computed as:
seconds/speed step = CV 3 x 0.896÷Number of speed steps
When this CV is set to 0, the locomotive speed will respond nearly instantly
to decreases in the throttle setting. When set to 255, it will take approximately
3.8 minutes to brake to a stop from full speed.
It is recommended that this CV be set to a nonzero value when operating the
DSD in 14 or 28 speed step modes as the throttle will interpolate between
speed steps during braking to produce a smoother overall response.
Default value: 0
Related CVs: See also Baseline Acceleration, Consist Acceleration
Rate, Consist Brake Rate.
Tsunami Technical Reference Page 4
Primary CVs
Bit 7 Bit 0
CV 7
Manufacturer Version ID (Read Only)
Description
Contains 8-bit software version identier.
D7 D6 D5 D4 D3 D2 D1 D0
D0-D7: Version Code
64 = Tsunami Steam Decoder, V1.0
65 = Tsunami Diesel Decoder, V1.0
This CV is read only and cannot be modied.
Tsunami Technical Reference Page 5
Primary CVs
Bit 7 Bit 0
CV 8
Manufacturer ID
Description
Contains the NMRA issued Manufacturer ID code assignment for
SoundTraxx/Throttle Up! (141):
1 0 0 0 1 1 0 1
Writing a value of 8 to this CV will reset all CVs to their default value. All other
write operations will be ignored.
Tsunami Technical Reference Page 6
Primary CVs
Bit 7 Bit 0
CV 10
BEMF Cutout
Description
This is used to gradually reduce the effect of the BEMF Control as locomotive
speed is increased. This CV contains a value from 0-127 that corresponds to
the speed step at which the intensity of BEMF control will be reduced to zero.
D7 D6 D5 D4 D3 D2 D1 D0
D0-D7: BEMF Cutout
This CV can alternatively contain a value from 128-255 which will cause
the BEMF intensity to decrease to a percentage between 0 and 50% of the
BEMF intensity set by CV 212 as:
Full Speed BEMF Intensity = (CV 212 – 128)÷128
Default value: 0
Tsunami Technical Reference Page 7
Bit 7 Bit 0
Primary CVs
CV 11
Packet Time Out Value
Description
Contains a value between 0 and 255 corresponding to the time period that is
allowed to elapse between receipts of a valid packet addressed to the DSD
before a throttle shutdown occurs.
D7 D6 D5 D4 D3 D2 D1 D0
D0-D7: Packet Time-out Value
The time out period is computed in seconds as:
Time Out Period = CV 11 X 0.25
A CV value of 0 disables the time out period and the locomotive will run
indenitely without receiving another packet.
For all other values, the DSD maintains an internal timer, which is reset every
time the DSD receives a valid broadcast address packet or other valid packet
whose address matches its primary address or, if enabled, the extended
address or consist address.
In the event no valid packets are received within the prescribed time period,
the DSD will bring the locomotive to a stop at the rate set by CV 4 and CV
24. The state of the auxiliary function outputs will remain unchanged.
Default value: 0
Tsunami Technical Reference Page 8
Primary CVs
Bit 7 Bit 0
CV 12
Power Source Conversion
Description
Denes the type of power source the decoder should switch to whenever a
DCC signal is not present and the APS bit of CV 29 (bit 2) is set.
D7 D6 D5 D4 D3 D2 D1 D0
D0-D7: Alternate Power Source
0 = No Alternate Power Source Available
1 = Analog Power Supply
Default value: 1
Tsunami Technical Reference Page 9
Primary CVs
Bit 7 Bit 0
CV 13
Analog Function Enable 1
Description
Denes whether functions 1-8 are active during analog mode operation. If
the bit is set, the corresponding function will be mapped to the output as
dened by CVs 33-46.
F8 F7 F6 F5 F4 F3 F2 F1
F1-F8: Analog Function Enable Bit
0 = Function is disabled for analog operation
1 = Function is enabled for analog operation
Default value: 0
Tsunami Technical Reference Page 10
Primary CVs
Bit 7 Bit 0
CV 14
Analog Function Enable 2
Description
Denes whether functions 9-12 are active during analog mode operation.
If the bit is set, the corresponding function will be mapped to the output as
dened by CVs 33-46.
F12 F11 F10 F9 F0 (r) F0 (f)
F0 (f): F0 Forward Enable Bit
0 = Function is disabled for analog operation
1 = Function is enabled for analog operation
F0 (r): F0 Reverse Enable Bit
0 = Function is disabled for analog operation
1 = Function is enabled for analog operation
F9-F12: Analog Function Enable Bit
0 = Function is disabled for analog operation
1 = Function is enabled for analog operation
Default value: 3
Tsunami Technical Reference Page 11
Primary CVs
Bit 7 Bit 0
CV 15
CV Unlock Register
Description
Contains a value from 0-7 that is used to unlock access to the decoder’s CVs
in a multi-decoder installation.
CV 15 may always be written or veried regardless of the decoder’s lock
status. An acknowledgment will only be generated, however, when the
decoder is unlocked.
0 0 0 0 0 D2 D1 D0
D0-D2: Unlock Code
Locked State
If CV 15 does not match CV 16, all read and write operations to the
decoder will be ignored and no acknowledgment is generated.
Unlocked State
Access to the decoder’s CVs occurs only when CV 15 = CV 16.
Note: CVLCKE Bit in CV 30 must be set to enable the lock feature in CVs
15 and 16.
Default value: 0
Related CVs: See also Error Information/Alternate Mode Selection.
Tsunami Technical Reference Page 12
Primary CVs
Bit 7 Bit 0
CV 16
CV Lock ID Code
Description
Contains a value from 0-7 that sets the unlock code that must be
programmed into CV 15 in order to access the decoder’s CVs in a multidecoder installation.
CV 15 may always be written or veried regardless of the decoder’s lock
status. An acknowledgment will only be generated, however, when the
decoder is unlocked.
0 0 0 0 0 ID2 ID1 ID0
ID0-ID2: CV Lock Code
Note: CVLCKE Bit in CV 30 must be set to enable the lock feature in CVs
15 and 16.
Default Value: 0
Related CVs: See also Error Information/Alternate Mode Selection.
Tsunami Technical Reference Page 13
Primary CVs
Bit 7 Bit 0
Bit 7 Bit 0
CV 17,18
Extended Address
Description
CV 17 and 18 make up a ‘paired’ CV, meaning that the two CV registers
taken together hold one piece of data; in this case, the 14-bit extended
decoder address:
CV 17 Extended Address MSB
A15 A14 A13 A12 A11 A10 A9 A8
CV 18 Extended Address LSB
A7 A6 A5 A4 A3 A2 A1 A0
A0-A15: Extended Address Value
The extended address allows the decoder to be assigned one of 10,179
addresses ranging from 0xC000 to 0xE7FF (Note however, that most
command stations will only recognize addresses 0000 through 9999.). The
extended address will only be recognized by the decoder when CV 29, bit
5 is set to 1. Once this bit is set, the decoder will no longer recognize its
primary address until CV 29, bit 5 is cleared.
CV 17 contains the most signicant byte and must be loaded with values
within the range of 0xC0 and 0xE7. CV 18 contains the least signicant byte
and may contain any value.
To determine the extended address value, add the desired four-digit address
to the number 49152. Divide this number by 256 and record the quotient and
the remainder. CV 17 is then programmed with the quotient value and CV 18
is programmed with the remainder value.
Example: Compute CV 17 and 18 register values for extended address 7152.
1. Add 7152 to 49152: Sum = 56304.
2. Divide 56304 by 256: Quotient = 219 Remainder = 240
3. Program CV 17 to 219
4. Program CV 18 to 240
Note: Most command stations will handle these computations automatically
Tsunami Technical Reference Page 14
Primary CVs
when setting the extended address. However, it’s still nice to know how to
derive them.
Because CV 17 and 18 make up a paired CV, programming order is
important. CV 17 must be written to rst, followed by a write to CV 18. The
decoder will ignore commands that attempt to program these registers out of
order or with values outside the allowed range of 0xC000 to 0xE7FF.
These CVs may be changed in service mode at any time, but in operations
mode only when CV 29, bit 5 is cleared (i.e., CV 1, Primary Address is
enabled).
Default Value: CV 17 = 192, CV 18 = 03 (Long Address 0003)
Related CVs: See also Primary Address, CV 29, Consist Address.
Tsunami Technical Reference Page 15
Primary CVs
Bit 7 Bit 0
CV 19
Consist Address
Description
Contains address and direction data for consist operation:
CDIR A6 A5 A4 A3 A2 A1 A0
Bit 0-6: A0-A6, Consist Address Value
Bit 7: CDIR, Consist Direction
0 = Normal Direction
1 = Reverse Direction
The CDIR bit denes orientation of the locomotive within a consist and
species whether the direction bit in a speed/direction data packet should be
inverted.
Bits A0-A6 assigns the consist address from 0 to 127. If A0-A6 = 00, consist
commands are ignored. Otherwise, if the decoder receives a valid command
packet whose address matches the consist address, the packet will be
processed as any other packet with the following exceptions:
Long Form CV Access instructions will be ignored.
The direction bit in a speed/direction or advanced operation packet is
inverted if CDIR = 1.
Only the auxiliary functions enabled in CV 21 and CV 22 are allowed to
change.
When the consist address is active, speed/direction and advanced operations
packets sent to the decoder’s primary address (or extended address, if
enabled) will be ignored. All other instruction packets sent to the decoder’s
primary (or extended) address, including CV access and function control, will
continue to be processed as normal.
In summary, setting CV 19 to 0 or 128 disables consist addressing. Setting
CV to a value between 1 and 127 enables consist addresses 1 to 127
with the locomotive oriented facing forward in the consist. Setting CV to a
value between 129 and 255 enables consist addresses 1 to 127 with the
locomotive oriented facing backwards in the consist.
Default Value: 0
Related CVs: See also Primary Address, Consist Function Active,
Consist F0 Function Active.
Tsunami Technical Reference Page 16
Primary CVs
Bit 7 Bit 0
CV 21
Consist Function Group 1
Description
Denes which Group 1 functions may be controlled by packets sent to the
decoder’s consist address. Disabled functions may be controlled only from
decoder’s primary or extended address:
F7 F6 F5 F4 F3 F2 F1 F0
Bit 0: F1, Consist Function 1 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 1: F2, Consist Function 2 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 2: F3, Consist Function 3 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 3: F4, Consist Function 4 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 4: F5, Consist Function 5 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 5: F6, Consist Function 6 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 6: F7, Consist Function 7 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 7: F8, Consist Function 8 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
This register is useful for differentiating the lead engine in the consist from
the other engines. For example, by setting this register in the lead locomotive
Tsunami Technical Reference Page 17
Primary CVs
to 2 and the same register in all other engines to 0, only the whistle on the
lead locomotive will blow when the command to turn on Function 2 is sent to
the consist.
Default Value: 0
Related CVs: See also Consist Address, Consist F0 Function Active.
Consist F0 Function Active.
Tsunami Technical Reference Page 18
Primary CVs
Bit 7 Bit 0
CV 22
Consist Function Group 2
Description
Denes which Group 2 functions may be controlled by packets sent to the
decoder’s consist address. Disabled functions may be controlled only from
decoder’s primary or extended address:
F12 F11 F10 F9 F0 (r) F0 (f)
Bit 0: F0(f), Function 0, Forward enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 1: F0(r), Function 0, Reverse enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 2: F9, Consist Function 9 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 3: F10, Consist Function 10 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 4: F11, Consist Function 11 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 5: F12, Consist Function 12 Enable Bit
0 = function is disabled for consist operation.
1 = function is enabled for consist operation.
Bit 6: Reserved.
Bit 7: Reserved.
This register is useful for differentiating the Headlight and Backup Light
functions in the lead engine of the consist from the other engines. For
example, by setting this register in the lead locomotive to 1 and the same
register in all other engines to 0, only the headlight in the lead engine will be
on and only when the consist is moving forward.
Default Value: 0
Related CVs: See also Consist Address, Consist Function Active.
Tsunami Technical Reference Page 19
Primary CVs
Bit 7 Bit 0
CV 23
Consist Acceleration Rate
Description
Contains a value between -127 to +127 corresponding to the decoder’s
consist acceleration offset:
sign D6 D5 D4 D3 D2 D1 D0
Bits 0-6: D0-D6, Consist Acceleration value
Bit 7: Sign
0 = positive value
1 = negative value
When the consist address is active, the consist acceleration rate is added to
or subtracted from the decoder’s base acceleration rate depending on the
sign bit. The acceleration is then computed as:
seconds/speed step = (CV 3 + CV 23) x 0.896÷Number of speed steps
If the sum of CV 3 and CV 23 is negative, then the acceleration rate is set to
0 (i.e., acceleration is instant.) If the sum of CV 3 and CV 23 exceeds 255,
then the acceleration rate is set to the maximum value of 255.
This CV has no effect when the consist address is set to 0.
In summary, a CV value between 0 and 127 will increase the decoder’s base
acceleration rate. Values between 128 and 255 will decrease the decoder’s
base acceleration rate.
Default value: 0
Related CVs: See also Baseline Acceleration Rate, Baseline Braking
Rate, Consist Brake Rate.
Tsunami Technical Reference Page 20
Primary CVs
Bit 7 Bit 0
CV 24
Consist Braking Rate
Description
Contains a value between -127 to +127 corresponding to the decoder’s
consist braking offset:
sign D6 D5 D4 D3 D2 D1 D0
Bits 0-6: D0-D6, Consist Braking value
Bit 7: Sign
0 = positive value
1 = negative value
When the consist address is active, the consist braking rate is added to or
subtracted from the decoder’s baseline braking rate depending on the sign
bit. The braking rate is then computed as:
seconds/speed step = (CV 4 + CV 24) x 0.896÷Number of speed steps
If the sum of CV 4 and CV 24 is negative, then the braking rate is set to 0
(i.e., braking is instant.) If the sum of CV 4 and CV 24 exceeds 255, then the
braking rate is set to the maximum value of 255.
This CV has no effect when the consist address is set to 0.
In summary, a CV value between 0 and 127 will increase the decoder’s base
braking rate. Values between 128 and 255 will decrease the decoder’s base
braking rate.
Default value: 0
Related CVs: See also Baseline Acceleration Rate, Baseline Braking
Rate, Consist Acceleration Rate.
Tsunami Technical Reference Page 21
Primary CVs
CV 25
Speed Table Select Register
Description
Used to select one of 15 Speed Curves:
Bit 7 Bit 0
MIDSPD
D0-D6: Table Identier/Speed Step Value
MIDSPD: 0 = Factory Speed Table Select
1 = Mid Range Speed (Not used)
When MIDSPD = 0, D0-D6 denes which preset factory speed table is used.
0 = Disabled, Speed Curves not used
1 = Disabled, Speed Curves not used
2 = Linear Speed Curve
3 = Logarithmic Curve 1
4 = Logarithmic Curve 2
5 = Logarithmic Curve 3
6 = Logarithmic Curve 4
7 = Logarithmic Curve 5
8 = Logarithmic Curve 6
9 = Logarithmic Curve 7
10 = Exponential Curve 1
11 = Exponential Curve 2
12 = Exponential Curve 3
13 = Exponential Curve 4
14 = Exponential Curve 5
15 = Exponential Curve 6
16 = User Dened Speed Table dened by CVs 67-94.
D6 D5 D4 D3 D2 D1 D0
CV 25 may be programmed with any value between 0 and 31. Values
between 2 and 15 allow the user to select from one of 14 predened speed
curves as depicted below. The logarithmic curves provide a shallower
speed response as the throttle is increased. These curves are useful for
locomotives that require a high starting voltage to get moving or matching
a highly geared locomotive to one that has less gearing. The exponential
curves are useful for slowing down locomotives that have a “slot car”
response.
Setting this CV to a value of 16 will enable the speed curve programmed into
CVs 67-94. This curve may be programmed by the user to get virtually any
response desired.
Tsunami Technical Reference Page 22
Primary CVs
100%
0 2 4 6 8 10 12 14 16 18 20 22 24 26 28
Note that in order for the selected curve to be active, bit 4 of CV 29 must also
be set to 1. If CV 29, bit 4 is 0, the throttle response will be linear (straight
line).
LOG 7
75%
LOG 6
LOG 5
LOG 4
LOG 3
LOG 2
LOG 1
50%
25%
LINEAR
EXP 1
EXP 2
EXP 3
EXP 4
EXP 5
EXP 6
0%
The speed curves can be used in 14, 28 and 128 speed step modes.
Bit 7 is dened by the NMRA RPs as the Mid Range Speed Step select bit.
The DSD does not implement this feature and will ignore commands that
attempt to program this bit with a 1 (i.e., data values between 128-255).
Default value: 0
Related CVs: See also CV 29, Loadable Speed Table.
Tsunami Technical Reference Page 23
Primary CVs
Bit 7 Bit 0
CV 29
Configuration Register 1
Description
CV 29 contains miscellaneous decoder conguration bits:
0 0 EAM STE ACK APS F0 DIR
Bit 0: DIR, Direction Bit
0 = normal operation
1 = direction bit in Speed/Direction instruction is inverted
before processing.
Bit 1: F0 Location
0 = F0 state is controlled by bit 4 of Speed/Direction
Instruction (14 Speed Step Mode)
1 = F0 state is controlled by bit 4 of Function Group 1
Instruction (28 and 128 Speed Step Modes)
Bit 2: APS, Alternate Power Source enable
0 = NMRA Digital Only
1 = Alternate Power Source enabled as set by CV 12
Bit 3: ACK, Advanced Acknowledge Mode enable (not used)
0 = Advanced Acknowledge mode disabled.
1 = Advanced Acknowledge mode enabled.
Bit 4: STE, Speed Table Enable
0 = Standard Speed Table
1 = Use custom speed table selected by CV 25.
Bit 5: EAM, Extended Address Mode enable
0 = Decoder responds to Primary Address in CV 1
1 = Decoder responds to Extended Address in CV 17-18
Bit 6: Reserved for future use.
Bit 7: Multifunction Decoder - Always reads as 0.
When the DIR bit is set, the locomotive and headlight will run in a direction
opposite to the speed/direction instruction received. This bit is mostly useful
for diesel locomotives that are run long hood forward and has little use for
steam operation.
The F0 bit should be cleared to 0 if you are using the decoder in 14 speed
step mode. If you are using 28 or 128 speed step modes, this bit should be
Tsunami Technical Reference Page 24
Primary CVs
set to 1.
The STE bit must be set to 1 in order to enable any of the speed curves
selected using CV 25. Otherwise, the DSD will provide a linear (straight-line)
throttle response.
The EAM bit must be set to 1 in order to activate extended address
capability. Note that once this bit is set, the decoder will respond to
commands sent to the extended address only and commands sent to the
primary address will be ignored. This can be a problem if you are using
a command station that does not support extended addressing and the
bit gets accidentally set. In such a case, you must connect the DSD to a
programming track to gain access to the CV and clear the bit.
The APS bit must be set to 1 in order to activate an alternate power mode as
set in CV 12. To activate Analog Mode Operation, you must also set CV 12 to
1.
The DSD does not support advanced acknowledgment and the ACK bit will
always read as 0.
Default value: 2
Related CVs: See also Extended Address, Loadable Speed Table.
Tsunami Technical Reference Page 25
Primary CVs
Bit 7 Bit 0
CV 30
Error Information/Alternate Mode Selection
Description
Contains manufacturer dened error codes and provides feedback in the
event an operational failure occurred within the DSD. It is also used to re-
congure the decoder for non-NMRA compliant options:
GRP23 CVCLR CVLCKE
Bit 0: CVLCKE, CV Lock Enable
0 = Normal operation.
1 = Enables CV Lock as set in CVs 15 and 16.
Bit 1: CVCLR, CV Clear
0 = Normal operation.
1 = All CVs will be reset to default values at next power
cycle.
Bit 2: GRP23, Function Group 2 and 3 Exchange
0 = System Normal, DSD processes group 2 and 3
function commands according to the NMRA standard.
1 = Function Group 2 (F5-F8) assignments are swapped
with Function Group 3 (F9-F12)
Bits 3-7: Reserved.
Default value: 0
Related CVs: See also CV Unlock Register, CV Lock ID Code.
Tsunami Technical Reference Page 26
Function Output CVs
CV 33-46
Function Output Map
CVs 33-46 allow the user to customize which DSD outputs or sound effects
are controlled by which function keys. Each function input, F0 through F12,
is assigned a unique CV that allows the corresponding function control to be
redirected to up to fteen different DSD function outputs or sound effects.
This allows a single function key to control more than one output if desired.
The F0 function has two CVs - one for forward direction and one for reverse.
Function outputs mapped to these registers will be directional unless the
same output is mapped to both CVs.
Note that all function inputs cannot be mapped to all outputs. The matrix
below graphically indicates which inputs can control which outputs:
Function Mapping Table
33
34
35
36
37
38
39
40
41
42
43
44
45
46
Control CV
HL
BL
WH
1
1
1
1
4
2
4
2
4
2
4
2
Function Key
F0 (f)
F0 (r)
F1
F2
F3
F4
F5
F6
F7
F8
F9
F10
F11
F12
Bold Numbers indicate default settings.
8
8
8
8
1
1
1
1
X
BEL
16
16
16
16
SHW
STM
64
64
64
64
8
8
8
4
4
4
WS
128
128
128
128
16
16
16
8
8
8
DIM
X
X
X
32
32
32
16
16
16
MUT
64
64
64
32
32
32
INJ
128
128
128
64
64
64
BRK
CPL
128
128
128
FX5
32
32
32
32
4
2
4
2
4
2
4
2
X
X
FX6
64
64
64
64
8
8
8
8
1
1
1
DYN
128
128
128
128
16
32
16
32
16
32
16
32
2
4
2
4
2
4
1
2
1
2
1
2
Tsunami Technical Reference Page 27
Function Output CVs
Steam:
CV 33
F0(f) Output Location
Description
Maps the F0(f) function to any of eight DSD auxiliary function outputs as
dened by a 1 in the corresponding bit position:
Bit 7
SHW DYN FX6 FX5 BEL WH BL HL
Bit 0: HL, Head light output
0 = Output is unaffected by F0(fwd).
1 = Output is activated when F0(fwd) is on.
Bit 1: BL, Backup light output
0 = Output is unaffected by F0(fwd).
1 = Output is activated when F0(fwd) is on.
Bit 2: WH, Whistle Sound Effect
0 = Sound is unaffected by F0(fwd).
1 = Sound is activated when F0(fwd) is on.
Bit 3: BEL, Bell Sound Effect
0 = Sound is unaffected by F0(fwd).
1 = Sound is activated when F0(fwd) is on.
Bit 4: FX5, Effect 1 output
0 = Output is unaffected by F0(fwd).
1 = Output is activated when F0(fwd) is on.
Bit 0
Bit 5: FX6, Effect 2 output
0 = Output is unaffected by F0(fwd).
1 = Output is activated when F0(fwd) is on.
Bit 6: DYN, Dynamo Sound Effect
0 = Sound is unaffected by F0(fwd).
1 = Sound is activated when F0(fwd) is on.
Bit 7: SHW, Short Whistle Sound Effect
0 = Sound is unaffected by F0(fwd).
1 = Sound is activated when F0(fwd) is on.
Default Value: 65
Related CVs: See also CVs 34-46
Tsunami Technical Reference Page 28
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