ZIMO MX695, Инструкция по эксплуатации

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Large-scale Decoder & Sound Decoder MX695, MX696, MX697, MX699 Page 51
7.6 Steam engine

Load and acceleration dependency
The load dependency of the sound is based on the current engine load and the acceleration /
deceleration settings. The results of the “basic” load test serve as reference for the current mo-
tor load, see section 7
.3 "The test run for determining the motor’s basic load”.
NOTE: ZIMO large-scale decoders MX695 and up, and possibly some of the smaller decoders
(but not the current MX640
– MX648’s) contain a position and acceleration sensor that will im-
prove the function of load dependency dramatically, once it is activated with future software
versions.
To set up load dependent sound, follow the instructions in this order:
+
Perform "The test run for determining the motor’s basic load”; see chapter 5.3
+
Adjust CV’s #275 and #276
+ Adjust CV #277 + If needed CV #278 and #279
NOTE: The CV’s in this chapter affect the volume’s load dependency of the relevant sound
(that is, by how much the volume should increase at higher loads or decrease by lesser loads,
all the way down to mute if necessary). A possible exchange of sound samples at load in-
crease or decrease is however a matter of the sound project program.
There are however special exceptions to this rule...
CV Designation Range
INC-
Step
Default Description
LEAD
- CV
#275
Chuff sound
volume at low
speed and no-load
0 - 255 10 60
With this CV the chuff volume can be ad-
justed for low speed and “basic load”
(same conditions as during the “automat-
ed recording run”).
Here, the engine is driven by about 1/10
of its full speed, adhering to the exact
speed is however not important.
During this adjustment CV #277 is to be
left at “0” (default), so that the setting for
“no-load driving” is not influenced by load
factors.
#276
Volume at high
speed and no-load
0 - 255 10 80
Same procedure as in CV #275 above,
but for high speed.
CV #276 defines the
“basic-load” chuff
sound volume at full speed. Set the speed
regulator to maximum during this set-up.
#277
Chuff volume
changes accord-
ing to load
0 - 255 10
0
=
no
reac-
tion
When deviating from the basic load (as
determined by the “Automated recording
of
the motor’s “basic load” factor”, see
above), the chuff beat volume should be
increasing (on inclines) or decreasing on
declines (even muted).
CV #277 defines the degree of change,
which must be set to the proper value by
trial.
LEAD
- CV
#278
Load change
threshold
0 - 255 10 0
With this CV, a change in volume to small
load changes can be suppressed (i.e. in
curves) in order to prevent chaotic sound
impressions.
Suitable settings can only be determined
by trial.
#279
Reaction time to
load change
0 - 255 1 0
This CV determines how quick the sound
reacts to load changes, whereas the fac-
tor is not just time but rather “load-change
dependent time” (= the bigger the change
the faster the effect). This CV is also used
to suppress chaotic sound changes.
Suitable settings can only be determined
by trial.
LEAD
- CV
#281
Chuff volume
-
Acceleration
threshold for full
load sound
0
– 255
(internal
speed
steps)
1 1
More powerful and louder chuff sounds
should be played back indicating in-
creased power requirements during ac-
celerations, compared to “basic load”. As
is the case with the prototype, the in-
creased sound should be noticeable be-
fore the increase in speed becomes visi-
ble, since the latter is a result of the in-
creased steam volume supplied to the pis-
tons. It is therefore practical that the
heavy acceleration sound is played back
when the speed has increased by just one
speed step (when no real speed change is
noticed), to be able to control the proper
sound sequence with the speed regulator.
The “engineer” can in this fashion adjust
the sound (by increasing the speed by 1
step) in anticipation of an imminent in-
cline.
=1: Acceleration sound played back (at
full volume) if speed has increased by just
one speed step.
= 2, 3…. Acceleration sound played back
at full volume only after increasing speed
by this number of speed steps; before
that: proportional volume.
#282
Duration of
acceleration
sound
0 - 255
=
0 - 25
sec
10
30
=
3 sec
The acceleration sound should remain for
a certain length of time after the speed in-
creased (otherwise each single speed
step would be audible, which is unrealis-
tic).
NOTE: The default values
listed in the individual CV’s are guidelines only,
as actual values in
reality may be determined by the loaded sound project; this also means that a HARD RESET
with CV #8 = 8 restores the CV’s back to the sound project values.