What is a CV?
The CVs
of a DCC decoder are essentially a collection of parameters/variables which
influence how the decoder behaves. Many CVs are standard, in that they
follow the guidelines set out by the NMRA organisation. However, any fairly
advanced decoder will have in addition to this a whole bunch of CVs specific
to itself. This is especially true for sound decoders, which provide far more
functionality than was ever designed for when NMRA came up with the original
standard.
CT's Revision 4 family decoders are no
exception, having over 180 CVs for various purposes, some of which I'll discuss
in this document.
Note that all CT Revision 4 decoders (from Version 40 onwards) share the same CV meanings, although
of course some of the CVs are simply ignored on certain decoders where physical features are not available,
such as less Function Outputs.
Please note that
I have by no means experimented with every CV available, so this is really
just a commentary on those areas that I understand. There is yet more functionality that I've gone nowhere near yet - in particular
features to support Zimo's Signal Controlled Speed protocol.
These look very interesting, but are way beyond where most people will expect
to take the decoder.
For the most part,
I will be discussing sound configuration, lighting, extended function mapping
and motor control. There are of course many 'standard' features within
the decoder, which are all NMRA-compliant, such as speed-steps, addressing,
basic function mapping etc, and for those I will only pay brief lip-service
because they are generally well understand and well documented elsewhere - such
as on NMRA's own web site.
Addressing CVs
Let's start with
some CVs that are NRMA-standard across the board, relating to loco addressing...
| CV(s) |
Purpose |
Range
(Default) |
Comments |
| 1 |
Short
address |
1-127
(3) |
For
short addresses when CV29 Bit 5 is set at 0. |
| 17+18 |
Extended
address |
128-10240
(0) |
CV29
bit 5 must be set in order to use a long address. CVs 17+18 are used to
specify the long address. Please refer to NMRA standards for how this value
is calculated. |
| 19 |
Multi-Unit
(Consist) address |
0-127
(0) |
0
means not in a consist |
General
CVs
Now let's discuss
some of the general-purpose CVs, and those which don't really have a specific
category to fit into...
| CV(s) |
Purpose |
Range
(Default) |
Comments |
| 7 |
Version
Number |
|
Read-only specifies the CT software (firmware) version loaded onto the decoder. |
| 8 |
Manufacturer
ID |
117 |
CT Elektronik is always 117. Read-only. |
| 30 |
Error
diagnosis |
0-3 |
1=motor;
2=light; 3=both short-circuit |
| 53 |
Decoder LOCK/UNLOCK and Access to CVs above 99 on limited systems. |
0-255
(0) |
Special CV for programming beyond CV99 on old system PLUS decoder LOCK/UNLOCK feature.
For Roco Lokmaus users and any other systems which can only address CVs up to 99. Set bits 0 or 1 to address CVs over 99.
Not necessary on most DCC systems.
CV53=66: programming and feedback off (LOCK decoder from accidental re-programming.set to 77 to UNLOCK)
CV53=77: programming and feedback on (UNLOCK decoder for programming. after setting to 66 previously)
CV53=0: 0-99 programmed CV value i.e. CV actually programmed is the one requested
CV53=1: 100+ programmed CV value i.e. with CV53=1, any other CV programming goes to the CV+100, so CV8 would actually be sent to CV108 etc.
CV53=2: 200+ programmed CV value
|
| 105 |
User
CV1 |
0-255 |
Free for remembering purchase date or similar user information |
| 106 |
User
CV2 |
0-255 |
Free for remembering purchase date or similar user information |
| 109 |
Selection
of CV set: |
0-1
(0) |
0
uses 1st CV set; 1 uses 2nd CV set. Can be used for various purposes - CV
set for home layout + CV set for club layout for example. Hard reset will
only affect the currently selected CV set. CV109 will be unchanged by a
hard reset. |
| 111 |
Intensity
of acknowledgement pulse (ACK) |
0-255
(255) |
Can improve the programming capability, 128 is approx 50% of max acknowledgement
pulse (motor dependent) 200 = normal. |
| 137 |
Special
CV |
0-255
(0) |
Bit 0 (1)
- OFF = 8 functions, ON = 14 functions (MAN-bit) refers to F0-F12, btw
CV33-CV46 free assignment.
Bit 1 (2)
- ZIMO train number impulse on / off
Bit 2 (4)
- strong / normal / weak switched with F1, effective only when CV110 is
active, and dimmable via CV54
Bit 3 (8)
- strong / normal / weak switched with F2, effective only when CV110 is
active, and dimmable via CV54CV137
Bit 4 (16)
- ZIMO speed contrl - dependent train control 0 = off 1 = on
Bit 5 (32)
- Start sequence (Sound Slots 21-23) is played before motor starts to
spin - useful for diesel engines in particular as a rev-up sound before
phsyically setting off. Beware of using this feature though, as it actually
stops the 'standstill' background noise whilst the start-up sound is being
played, which can sound a bit odd unless you mix/blend the standstill sound
into the start-up sound!
Bit 6 (64)
- Set ON if you want to control additional functions using F4 - press
twice for F5, 3x for F6, 4x for F7 (useful if your controller does not
have access to many functions directly)
Bit 7 (128)
- 32kHz frequency motor control from software version 41, factory Bit7
= 0 16kHz
|
CVs
Related to Motor Control
CVs can be used
to greatly affect the motion of a loco, and the way the motor reponds to requests.
Even an old motor can often be tuned by CVs to make it run smoother than you
might expect. Below are presented a few of the SL51-4's motor-related CVs and
some comments on how I have used them...
| CV(s) |
Purpose |
Range
(Default) |
Comments |
| 2 |
Starting
voltage |
0-255 |
Voltage
to motor at speed step 1. Tune this if your motor requires a little more
umph to get it going, or you may find that the start-off sounds are not
totally synchronised with the actual physical moving off of the loco. |
| 3 |
Rate
of acceleration |
0-255 |
Adjust to affect the inertia effect of speeding up. Set to 0 if you want
no inertia effect - you control the speed immediately with your controller
instead. |
| 4 |
Rate
of deceleration |
0-255 |
Similar
to the above CV3, but for realistic slowing down |
| 5 |
Maximum
speed |
0-255 |
0
for no artificial limit (maximum 255 has same effect as 0) |
| 6 |
Middle
speed |
0-255 |
Together
with CV2 and CV5 a three-point speed curve can be set. Set CV6 = 0 to give
a linear speed curve. |
| 9 |
Motor
PWM |
0-255
(134) |
13-63
stepless from 30-150Hz,141-191 16kHz for coreless and bell anchor motors |
| 29 |
Miscellaneous
configuration bits |
0-255
(2) |
Bit 0 (1)
- Direction: OFF=normal; ON=inverted
Bit 1 (2)
- Speed steps: OFF=14/27; ON=28/128
Bit 2 (4)
- Operating mode: OFF=digital only; ON=DC and Digital
Bit 3 (8)
- not used
Bit 4 (16)
- Speed curve: OFF=default speed curve using CVs 2, 5 & 6; ON=free speed
curve using CVs 67-94.
Bit 5 (32)
- Address selection: OFF=1-127 (uses CV1); ON=128-10240 (uses CV17+18)
Bit 6 (64)
- not used
Bit 7 (128)
- not used
|
| 50 |
EMF
intensity: |
0-255
(255) |
How
strong is EMF effect: 0=no influence; 255=maximum. If you plan to use locomotives
in a consist then use a lower value. This reduces the effect of locos working
against each other if they cannot be configured to perform equally. Combine
this value with CV51 and CV52 to cater for different motor types - often
very smooth running can be achieved by experimenting with these values,
even on motors that are apparently jerky to begin with under DCC. |
| 51 |
P-Value |
0-255
(80) |
Optimises
EMF characteristics. Modify this to adapt to specific motor requirements
(proportional part). |
| 52 |
I-Value |
0-255
(40) |
Optimises
EMF characteristics. Modify this to adapt to specific motor requirements
(integral part). |
| 64 |
Reference
voltage |
0-255
(100) |
EMF
100 = 20V track voltage |
| 67-94 |
Free
speed curve |
0-252 |
Activated
with CV29 bit 4 is set.
Default values:
9, 18, 27, 36, 45, 54, 63, 72, 81, 90, 99, 108, 117, 126, 135, 144, 153,
162, 171, 180, 189, 198, 207, 216, 225, 234, 243, 252
|
| 116 |
Shunting
function (yard mode) configuration |
0-255
(0) |
Shunting
mode may be switched on/off via appropriate function mapping - see CT
extended function mapping document for more information
Only active
if bit0-bit2 set
Bit 0 (1)
- effects of CV3 and CV4 are disabled when shunting mode activated
Bit 1 (2)
- maximum speed is halved
Bit 2 (4)
- reverse is 65% of maximum speed (regardless of shunting mode) - applies
from SW Version 40 or later
Bit 3 (8)
- brakes with diode 4:1 is active - see also CV 162
Bit 4 (16)
- brakes without diode
Bit 5 (32)
- not used, must always be 0
Bit 6 (64)
- means that the "Rangierfunktion" acts as a command button that is, that
the automatic train control system (brake or diode and HLU) - (equivalent
to the MAN key = manual)
Bit 7 (128)
- short burst of idling, returning to normal speed
|
| 142 |
Short-circuit
threshold 1 |
0-255
(90) |
Direct
cut-off at overload of motor output |
| 143 |
Short-circuit
threshold 2 |
0-255
(80) |
Fast
cut-off at overload of motor output |
| 144 |
Short-circuit
threshold 4 |
0-255
(70) |
Slow
cut-off at overload of motor output |
| 162 |
Sensitivity
of the diode voltage |
0-255
(10) |
See
also CV116. Value of 10-20 is generally well tolerated, the smaller the
value the more sensitive. |
CVs
For Function Mapping
There is an NMRA
standard for mapping functions to buttons in DCC, and these are supported by
the SL51-4 too. However, the standard only defines how the first few functions
can be mapped, as it was developed before any decoders appeared on the market
with many more functions. The SL51-4 provides 8 function outputs which can be
used for things like lighting, smoke units, couplers/decouplers and just about
any other electrical device you can dream up which could fit in the train.
The SL51-4 provides
4 function outputs ready-wired so you can just attach the wires directly to
your lighting etc. as well as a further 4 function outputs provided via solder
pads. A total of 8 function outputs then.
On top of these
8 physical function outputs (4 on the SL75), you also have the sound effects
which you may want to control with the press of a button. There are up to 16
auxillary sound effects available for this purpose, plus you need a button to
switch the main running sounds on and off. That's a fair few function buttons
required! This means CT have had to provide some non-standard CVs to allow for
a wider mapping range.
The 16 Sounds Effects
are grouped into 2 banks of 8 (1-8 and 9-16) and only 1 of those banks is available
at any given time. You can switch between which bank is used by activating the
'Alt' function, so essentially you need to dedicate a Function Key specially
for the 'Alt' function. It is worth it though, as you can get to so many more
Sound Effects!
A separate document
is available for you to download from YouChoos which presents the CVs, the outputs
and sounds, in a tabular format, with examples of what values you need to put
into which CVs in order to get the desired mapping. Refer to the SL51-4
Extended Function Mapping document for a more detailed description (includes
a link to a downloadable mapping table in PDF or DOC format). It is quite straight-forward
once you have the table. You should note that some functions and sounds cannot
be mapped to certain function keys - there are ranges that you can choose from,
and this will become evident if you study the table.
I therefore will
not spend any more time discussing how function mapping works, other than to
list the CVs involved...
| CV(s) |
Purpose |
Comments |
| 33-46 |
NMRA
standard function mapping |
These
CVs follow the standard NMRA guideless for how CVs should be mapped. |
| 163-176 |
CT
extended function mapping |
A combination
of 33-46 and 163-176 provides full mapping of all the SL51-4's 8 function
outputs and sound effects, as well as shunting mode and main running sounds.
You really need to calculate the values for both ranges of CVs at the
same time to map the functions properly.
|
Function
Outputs, Effects and Related CVs
Let's now look
at what CVs are available that have some influence on the physical function
outputs, used for lighting, smoke units etc. We'll consider those CVs that are
related specifically to coupling units a little later.
| CV(s) |
Purpose |
Range
(Default) |
Comments |
| 13 |
Functions
active in analog mode |
0-255 |
Use
bits 0-3 (possibly 0-7?) to determine which function outputs are switched
on when operating on DC. |
| 54 |
PWM dimming level for function outputs |
0-255 (50) |
PWM for function output: specifies the level of dimming applied to any
function output with dimming selected via CV 57. Note that any function outputs with
dimming switched on have the same dimming level applied - they are not individually dimmable
by different amounts. Useful for reducing brightness of lights, or level of smoke generator for example.
CV54=50 means 50% power output on function. |
| 57 |
Dimming mask |
0-255 (0) |
Dimming mask: turns dimming (level defined in CV54) on and off for each function
output. Each bit represents one function output, up to 8 functions (bit 0 for white wire, bit
1 for yellow wire etc.) |
| 117 |
Function key for user-triggered Low-Beam dimming |
0-12
(0) |
The CVs above (54 and 57) control permanent dimming of the function outputs e.g.
if you always want a smoke generator to run at 50% power, use CVs 54 and 57 to achieve that.
However, the decoders also support a Function-Key controlled dimming which we will call
Low-Beam dimming here for the sake of convenience. When activated, it caused the outputs
to be temporarily dimmed for a timed period before they return to their normal output level again.
CV117 defines the Function Key that causes the Low-Beam effect to be applied. 1=F1, 2=F2 …
12=F12. See also CV118, CV119 and CV120. |
| 118 |
Mask for function-key triggered Low-Beam dimming |
0-255 (0) |
Controls which function outputs the Low-Beam action applies to. See
also CV 117 and 119. Each bit represents 1 function ouput (0-3). 1 = white wire,
2 = yellow wire, 4 = green wire, 8 = purple wire, 16 = 5th output, 32 =
6th output, 64 = 7th output, 128 = 8th output |
| 119 |
PWM dimming level for Low-Beam feature |
0-100 (0) |
Controls the dimming level when the Low-Beam feature
is activated. 50 = approximately 50% of full brightness, 100 = 100% i.e. no dimming. 0 also means no dimming. |
| 120 |
Cycle duration of Low-Beam effect |
0-255
(0) |
Defines how long the Low-Beam effect will last. See CVs 117, 118 and 119. |
| 114 |
PWM low-point for lighting effects |
0-100
(0) |
PWM for effects - some of the lighting effects chosen in CVs154-161 pulse between a high point and a
low point. This CV specifies the level of the low point in those cycles |
| 115 |
Flash cycle time |
0-255 (0) |
Cycle time for flashing light effects, as specified by CV154-161 |
| 139 |
Short-circuit threshold 1 |
0-255
(15) |
Direct
cut-off at overload of function outputs |
| 140 |
Short-circuit
threshold 2 |
0-255
(12) |
Fast
cut-off at overload of function outputs |
| 141 |
Short-circuit
threshold 3 |
0-255
(10) |
Slow
cut-off at overload of function outputs |
| 154 |
Lighting
effect for forward light |
0-255
(0) |
Output 0
(white wire)
0 - No effect
1 - Flashing
2 - Flash-pull
3 - Single
pulse strobe
4 - Double
Flashing strobe
5 - Headlight
(brightness between maximum and PWM value in CV 114)
6 - Ditch
light left (brightness between maximum and PWM value in CV 114)
7 - Ditch
light right (brightness between maximum and PWM value in the CV 114)
8 - Rotary
beacon (brightness between maximum and PWM value in the CV 114)
9 - Gyralite
(brightness between maximum and PWM value in the CV 114) - can also be
used for firebox glow
10 - Mars
light
11 - Soft-start
12 - Brake
sparks (short flash activated only when the loco comes to a stop)
For output
when forward only, add 64 to the above value e.g. 1 + 64 = 65 flashing
on Forward only. For output when in reverse only, add 128 to the above
value e.g. 1 + 128 = 129 flashing on Reverse only. If neither 64 nor 128
is added, it is assumed that the effect should be active for both forwards
and reverse.
CVs 155 -161
provide the same effects for each of the other function outputs.
|
| 155 |
Lighting
effect for reverse light |
0-255
(0) |
Output
1 (yellow wire) - see CV154 |
| 156 |
Lighting
effect for function output 2 |
0-255
(0) |
Output
2 (green wire) - see CV154 |
| 157 |
Lighting
effect for function output 3 |
0-255
(0) |
Output
3 (purple wire) - see CV154 |
| 158 |
Lighting
effect for function output 4 |
0-255
(0) |
Output
4 (solder pad) - see CV154 |
| 159 |
Lighting
effect for function output 5 |
0-255
(0) |
Output
5 (solder pad) - see CV154 |
| 160 |
Lighting
effect for function output 6 |
0-255
(0) |
Output
6 (solder pad) - see CV154 |
| 161 |
Lighting
effect for function output 7 |
0-255
(0) |
Output
7 (solder pad) - see CV154 |
Function Outputs, Coupler/Decoupler Related
CT decoders provide very good control for coupling units via function outputs. Here are the CVs
which relate to this use of the outputs...
| CV(s) |
Purpose |
Range
(Default) |
Comments |
| 55 |
PWM output level for holding of decoupler |
0-100 (32) |
Represents the holding current for the decoupler i.e. the reduced power for holding
after the initial uncoupling impulse (see CV56). |
| 56 |
Decoupler pulse time |
0-255 (60) |
Defines how long for the initial pulse on the decoupler at full power until it is reduced
to the value defined in CV55. Time is set in 0.1 second units. |
| 58 |
Dimming mask for decoupler function |
0-255 (0) |
Defines which function outputs the decoupler functionality applies to. Each bit represents one
function output. |
| 147 |
Discharge of the coupling |
0-126 (20) |
A kickback effect causing the locomotive to run backwards slightly - a tiny
jerk of the motor to achieve uncoupling. |
| 148 |
Away from wagons |
0-126 (50) |
Speed when driving away from wagons, locomotive runs in the current direction,
126 = max. Speed under. Take into account the time set in CV3. |
| 149 |
Discharge time |
0-255 (10) |
The time for the unit pushed back. 0.1 seconds, 10 = 1 seconds |
| 150 |
Drive away |
0-255 (30) |
The time for driving away unit 0.1 seconds, 30 = 3 seconds |
| 151 |
Selection of automatic disconnection |
0-12 (0) |
0 = off, 1 = F1 2 = F2 3 = F3, 4 = F4, etc. |
| 152 |
Uncoupling mask forwards |
0-255 (8) |
Select the function to be used, 4 = F2, 8 = F3, 16 = F4, 32 = F5, 64 = F6 128 = F7 |
| 153 |
Uncoupling mask backwards |
0-255 (8) |
Select the function to be used, 4 = F2, 8 = F3, 16 = F4, 32 = F5, 64 = F6 128 = F7 |
Zimo
Control System CVs
Also supported
by CT decoders are various aspects of the Zimo control system. I don't claim
to know anything about these, so presented here are simply direct translations
of the text from the CT documentation (see also CV 137 'Special CV')...
| CV(s) |
Purpose |
Range
(Default) |
Comments |
| 59 |
Signal
controlled speed "L" |
0-255
(168) |
Only
available in ZIMO environment |
| 60 |
Signal
controlled speed "U" |
0-255
(84) |
Only
available in ZIMO environment |
| 61 |
Signal
controlled acceleration reaction time |
0-255
(1) |
Only
available in ZIMO environment |
| 96 |
Zimo
Signal controlled speed "FL" |
0-255
(212) |
Speed
selected between F-L (or MX9 HLU) is in version 52, see CV59, 60 |
| 97 |
Zimo
Signal controlled speed "LU" |
0-255
(126) |
Speed
selected between L-U (or MX9 HLU) is in version 52, see CV59, 60 |
| 98 |
Zimo
Signal controlled speed "U-Stop" |
0-255
(42) |
Speed
selected U-Stop (or MX9 HLU) is in version 52, see CV59, 60 |
| 138 |
Break
time (HLU) |
0-255
(3) |
Break
delay for HLU section (for ZIMO systems only) |
Using
CVs to Affect Sound
Our final section
on CVs will consider how the sound output can be controlled and affected...
| CV(s) |
Purpose |
Range
(Default) |
Comments |
| 49 |
Configuration
bits for sound |
0-255
(0) |
CV49=0 gives
4 cylinder steam engine
Bit 0 (1)
- set if you use a Reed switch for wheel synchronising for steam engines
- see also CV133=number of Reed Contacts - pulses per stroke e.g. CV133=1
means 1 stroke/pulse
Bit 1 (2) - set for Diesel or Electric loco - uses the AUTO slots - recommended approach for diesel/electric
Set both Bits 0 & 1 (value 3) for diesel and electric sounds that use Sound Slots 00 to
11 (must all be filled with sounds) - this is deprecated by the use of
the AUTO sound slots (also known as Slots 1000-3000), so is not recommended.
Bit 2 (4) gives 2 cylinder steam
Bit 3 (8) gives 3 cylinder steam
Bit 4 (16) - no steam strokes during downhill/deceleration (only idle sound)
Bit 5 (32) - evaluate the LGB pulse from F1
Bit 6 (64) - play no sound between stand-still and running e.g. whistle (Slots 21-23 and Slots 24-26)
Bit 7 (128) - no sound between running and stand-still e.g. brakes (Slots 27-29 and Slots 30-32)
|
| 62 |
Braking
threshold |
0-255
(10) |
Braking threshold: indicates the number of speed steps that need to be reduced
within 1 second in order for the rapid braking noise to trigger (Sound Slots 120 to 122). If
the sounds are in three parts, the middle section is played in a loop until the delay is over. |
| 104 |
Threshold
braking end |
0-255
(0) |
Braking
sequences, CV104 = 50 brake sequence is between 25 to 24 of running outsourced
(?). CV104 = 0, the sequence of the brake is automatic depending on the
sequence of the brake adapted (?) (valid from SW Version 100) See also to
CV62, CV107 - unsure of exact effect |
| 107 |
Break
threshold |
0-255
(0) |
Brake threshold: triggering of final brake sequence sounds (Slots 27-29 and 30-32).
CV107=50 triggers these brake sounds when speed steps from 25 down to step 24. CV107=0 triggers final
brake sounds when speed steps from 1 to step 0 i.e. actually stopped (recommended - for example, final
braking sounds where loco comes to an actual standstill). |
| 108 |
Bitmask
for enless manual sound |
0-255
(0) |
ONLY
operational when CV49 bit 5 is set. For use with LGB pulse chains.Bit 0
for sound 1; bit 1 for sound 2 etc. |
| 110 |
Load-dependent
sound variation: |
1-15
(4) |
Set to 0 to give no load-dependent variation; then a range from 1 (high
dependency) to 15 (low dependency on load). If configured carefully, this
feature can be used to detect a heavy train, or unhill climbs and cause
the sound (chuffs for steam) to use the 'acceleration' sounds under that
load. However, beware - using an excessive value here will cause the train
to produce unnecessarily loud chuffs at unwanted time e.g. travelling around
a curve. |
| 112 |
Random
sounds at standstill |
0-255
(255) |
Chooses
which sounds may occur randomly while idling. Set to 0 for no random sounds
at standstill or set bits 0-7 to control which sounds are included in random
play (Effects 1-8). See also CV131. It is not possible to specify sounds
9-16 for random play. |
| 113 |
Random
sounds during motion |
0-255
(255) |
Chooses
which sounds may occur randomly while the loco is moving. Set to 0 for no
random sounds while moving or set bits 0-7 to control which sounds are included
in random play (Effects 1-8). See also CV131. It is not possible to specify
sounds 9-16 for random play. |
| 121 |
Volume
for main sounds |
0-63
(63) |
Values depend
upon software version:
Old versions
have range 0-3 only (0 gives no sound, 3 gives maximum volume). Newer
versions have range 0-63 (63 being maximum). Expect that future versions
may range from 0-255.
|
| 122 |
Volume
& Repetitions for sound effect 1 |
0-255
(3) |
Volume & Repetitions for sound effect 1 (Slots 37-41): bits 0-1 specify
volume; bits 2-4 for number of repetitions of middle sound (Slot 39); bits
5-7 define number of repetitions of sound effect overall. If the 'Alternate'
sounds are activated, this applies to sound effect 9 instead (Slots 77-81) |
| 123 |
Volume
& Repetitions for sound effect 2 |
0-255
(3) |
Volume & Repetitions for sound effect 2 (Slots 42-46): bits 0-1 specify
volume; bits 2-4 for number of repetitions of middle sound (Slot 44); bits
5-7 define number of repetitions of sound effect overall. If the 'Alternate'
sounds are activated, this applies to sound effect 10 instead (Slots 82-86) |
| 124 |
Volume
& Repetitions for sound effect 3 |
0-255
(3) |
Volume & Repetitions for sound effect 3 (Slots 47-51): bits 0-1 specify
volume; bits 2-4 for number of repetitions of middle sound (Slot 48); bits
5-7 define number of repetitions of sound effect overall. If the 'Alternate'
sounds are activated, this applies to sound effect 11 instead (Slots 87-91) |
| 125 |
Volume
& Repetitions for sound effect 4 |
0-255
(3) |
Volume & Repetitions for sound effect 4 (Slots 52-56): bits 0-1 specify
volume; bits 2-4 for number of repetitions of middle sound (Slot 54); bits
5-7 define number of repetitions of sound effect overall. If the 'Alternate'
sounds are activated, this applies to sound effect 12 instead (Slots 92-96) |
| 126 |
Volume
& Repetitions for sound effect 5 |
0-255
(3) |
Volume & Repetitions for sound effect 5 (Slots 57-61): bits 0-1 specify
volume; bits 2-4 for number of repetitions of middle sound (Slot 59); bits
5-7 define number of repetitions of sound effect overall. If the 'Alternate'
sounds are activated, this applies to sound effect 13 instead (Slots 97-101) |
| 127 |
Volume
& Repetitions for sound effect 6 |
0-255
(3) |
Volume & Repetitions for sound effect 6 (Slots 62-66): bits 0-1 specify
volume; bits 2-4 for number of repetitions of middle sound (Slot 64); bits
5-7 define number of repetitions of sound effect overall. If the 'Alternate'
sounds are activated, this applies to sound effect 14 instead (Slots 102-106) |
| 128 |
Volume
& Repetitions for sound effect 7 |
0-255
(3) |
Volume & Repetitions for sound effect 7 (Slots 67-71): bits 0-1 specify
volume; bits 2-4 for number of repetitions of middle sound (Slot 69); bits
5-7 define number of repetitions of sound effect overall. If the 'Alternate'
sounds are activated, this applies to sound effect 15 instead (Slots 107-111) |
| 129 |
Volume &
Repetitions for sound effect 8
or
Strong time
(CV39 or older)
|
0-255
(3) |
From SW version
40 onwards CV 129 has this meaning:
Volume &
Repetitions for sound effect 8 (Slots 72-76): bits 0-1 specify volume;
bits 2-4 for number of repetitions of middle sound (Slot 74); bits 5-7
define number of repetitions of sound effect overall. If the 'Alternate'
sounds are activated, this applies to sound effect 16 instead (Slots 112-116)
Note that
it is not possible to individually control the volume or looping of sound
effects 9-16 (Slots 77-116) - they take on the settings for the equivalent
effect in sounds 1-8.
Prior to
SW version 40, CV 129 had the following meaning:
Strong time: time that the acceleration chuffs sounds (Slots 0-3) continue after strong acceleration (0.5 seconds units).
|
| 130 |
Weak
time |
0-255
(4) |
Weak time - how long the deceleration chuffs (Slots 8-11)) should continue
for after reducing speed (0.5 second units). |
| 131 |
Random
time |
0-255
(20) |
Minimum
time between 2 random sounds (0.5 second units). In practise it is the period
always used between random sound - it is not a random duration. |
| 132 |
Stroke Base at full speed |
0-255
(100) |
Stroke speed at full speed: Time between 2 strokes/chuffs at full speed |
| 133+134 |
Stroke Base at Step 1 |
(153/0) |
Stroke speed at Step 1 (LOW byte in CV133, HIGH byte in CV134): time between two steam strokes at speed step 1 in seconds.
This can be a large number, so is defined using 2 CVs (133 and 134 with the LOW byte in CV133 and HIGH byte in CV134).
Calculated via the formula: K = 1476 / time (1476 is a constant always used for this calculation by the decoder)
Example 1: K=153 gives approximately 9.6 sec between chuffs
Example 2: if 20 seconds wanted between chuffs, so K = 1476 / 20 = 73.8 rounded to 74 gives CV133 = 74, CV134 = 0
Example 3: if 3 seconds wanted between chuffs, so K = 1476 / 3 = 492. Since K > 256 we need to use 2 bytes, so split low byte and high byte: 492 / 256 = 1.927875 thus CV134 = 1 (rounded down), CV133 = remainder i.e. 492 - (256 * 1) = 236
|
| 135 |
Frequency
min |
0-255
(128) |
Reduces
the pitch of chuffs or engine sounds at lower speed steps. 128 is default
pitch (sounds played as originally recorded). Use this CV along with CV136
to define how engine pitch or chuff pitch increases with the speed of the
loco. |
| 136 |
Frequency
max |
0-255
(128) |
Increases
the pitch of chuffs or engine sounds at higher speed steps. 128 is default
pitch (sounds played as originally recorded). |
| 145 |
Activation
of sound looping |
0-255
(0) |
If the corresponding
sound function is activated, it will first play its 1st and 2nd Slots.
After that, Slot 3 is repeated until the feature is turned off. After
requesting off, it plays closing 4th and 5th Slots.
Bit 0 (1)
- for looping of Sound 1 (Slots 37-41)
Bit 1 (2)
- for looping of Sound 2 (Slots 42-46)
Bit 2 (4)
- for looping of Sound 3 (Slots 47-51)
Bit 3 (8)
- for looping of Sound 4 (Slots 52-56)
Bit 4 (16)
- for looping of Sound 5 (Slots 57-61)
Bit 5 (32)
- for looping of Sound 6 (Slots 62-66)
Bit 6 (64)
- for looping of Sound 7 (Slots 67-71)
Looping for
Sound effects 8-16 cannot be configured - they are not looping.
|
| 146 |
Strong
time |
0-255
(12) |
From
SW Version 40 onwards, CV146 has the following meaning (used to be in CV129):
Strong time: time that the acceleration chuffs sounds (Slots 0-3) continue after strong acceleration (0.5 seconds units).
|
| 177 |
Trigger
for rapid acceleration |
0-252
(40) |
Indicates
the number of speed levels that must be attained within any 100 msec period
in order to trigger the sound in Slots 123-125). If the sounds are in three
parts, the middle part is played in a loop until the requested speed is
reached. See also CV 107 for trigger to rapid braking sound. |
|
