Advanced Programming
Tsunami2 Electric User’s Guide
63
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
CVs 3 (Baseline Acceleration Rate) and 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 CVs 23 and 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 CVs 24 and 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 CVs 23 and 24 will have no effect on acceleration or deceleration. Also, if the
sums of CVs 23 and 3 and 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 […]
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 R. CV 247 Auto-Effect Enable
CV Value Active When
1 Forward-Driving
2 Reverse-Driving
3 Driving
4 Forward-Standing
5 Forward
6 Forward-Standing,
Reverse-Driving
7 Forward,
Reverse-Driving
8 Reverse-Standing
9 Reverse-Standing,
Forward-Driving
10 Reverse
11 Reverse,
Forward-Driving
12 Standing
13 Standing,
Forward-Driving
14 Standing,
Reverse-Driving
15 Continuously
Active
16
Emergency Stop Button pressed