15
Understanding the How Late
To display the How Late information, repeatedly press the Set Up key until the text “
How Late
” is displayed on the
left side of line 2. When taking two hits at the tree, the How Late feature of the Mega 350/450 will display which hit at the
tree was used to release the Transbrake. Displaying a 1 for Delay 1 or a 2 for Delay 2 in the left most digit. The remaining
digits are used to display this How Late time. For example if the number displayed is “2.012” the left most digit indicates that
Delay 2 was used to release the Transbrake and that Delay 1 would have released .012 seconds later. This means if your
reaction time was .510 on the time slip, add the How Late time of .012 to the .510 for a total reaction time of .522 on the
crossover delay.
Understanding Push-button
Modes and Push-button Interrupt Time
To view the current Push-button mode, repeatedly press the Set Up key until the text
P.B. Mode
is displayed on the
left side of line 3. The Push-button mode information displayed is made up of two parts separated by a blank space, with the
left digit indicating the Push-button mode and the two right digits indicating the Interrupt time. There are 3 different
Pushbutton modes listed below, each button mode changes how the Mega 350/450 handles the input from the push-buttons,
allowing the driver to select the preferred method.
1)
One button – one hit at the tree: This button mode should be used by anyone only planning on hitting the
tree once.
2)
Two buttons – two hits at the tree: This mode is used when wanting to hit the tree twice with two separate
buttons.
3)
One button – two hits at the tree: This mode is used when wanting to hit the tree twice with one button.
The Push-button Interrupt time is used to disable both the P.B. 1 and P.B. 2 inputs after the Transbrake releases.
While the push-buttons inputs are disabled, if a push-button is pressed it will have no affect on the Mega 350/450. The main
use of this feature is to protect against the reapplication of the Transbrake solenoid by accidentally hitting a push-button
connected to either P.B. 1 or P.B. 2 while making a pass.
Selectable Function Output (S.F.O.)
The Selectable Function Output is a single output that can be programmed to function in four separate ways. Each of
the separate functions is listed below with an explanation of the setting basic function. Once the basic understanding of the
settings is understood, additional uses may be thought of.
1)
When the S.F.O. is set to a one, the S.F.O. Functions as a Starting Line Enhancer (S.L.E.). This means a
Throttle Stop connected to the S.F.O. will control the starting line RPM.
2)
When the S.F.O. is set to a two, the S.F.O. Functions as a second Four Stage Timer. This means that a
Throttle Stop with dual solenoids, can have a separate Four Stage Timer driving each solenoid. Another
function would be to control a stage of NOS.
3)
When the S.F.O. is set to a three, the S.F.O. Functions as a Line Lock Control. This means that when the
Line Lock solenoids are connected to the S.F.O. terminal they will engage when either the push-button
connected to the Line Lock terminal is pressed (burn out) or when the Transbrake is engaged (starting line).
4)
When the S.F.O. is set to a four the S.F.O. functions as a second Transbrake output. This means that if the
main Transbrake output has been damaged in some way, the S.F.O. can be used as a spare until the box can
be shipped back for repairs.
5)
When the SFO is set to a five the output is turn off.
Because the S.F.O. can be used to control the Transbrake solenoid a safety circuit for the S.F.O. had to be designed
into the Mega 350/450. When the S.F.O. mode is set to 3, 4, or 5 the operation of the safety circuit is transparent. When the
S.F.O. mode is set to either 1 or 2 the Mega 350/450 will always work when a push-button is pressed. However when setting
the Throttle modes for Timer 2 the terminal strip output will not respond until the safety circuit is first reset. To reset the
safety circuit simply run a delay cycle by pressing and releasing a pushbutton connected to either P.B. 1 or P.B. 2.