13
The Outputs for Pro Mode
When the push-button, connected to P.B.1, is depressed and held, the Trans terminal will go to 12VDC and the Transbrake
solenoid will engage and the words “Transbrake On” will be displayed on the screen. When the yellow lights on the tree come
on, the push-button is released and the Mega 350/450 will start counting down the delay time. When the delay count down
reaches zero the Transbrake will release and the words “Transbrake On” will be removed from the display.
Stage 1, of the 2 Stage Timer, starts counting down when the Transbrake is released. When the Stage 1 count down
reaches zero, the T-stop terminal will change to the opposite voltage state. This means the Terminal will go from “Off”
(0VDC) to “On” (12VDC) or from “On” (12VDC) to “Off” (0VDC) depending on the Throttle mode setting. The Stage 2
time also starts counting down when the Stage 1 time reaches zero. The T-stop terminal will stay in this opposite voltage state
for the amount of time entered in Stage 2 of the 2 Stage Timer. When the Stage 2 count down reaches zero the T-stop terminal
will return to its normal voltage state. This completes the operation of the 2 Stage Timer. Any time during the operation of the
2 Stage Timer, from when the Transbrake releases to the completion of the Stage 2 time, the Programmable Throttle Stop
Override (P.T.S.O.) can be used.
The Shift controller also starts with the release of the Transbrake. This means in the case of a time shift the count down of
the shift time will start at the release of the Transbrake. When the count reaches zero the shift terminal will change to its
opposite voltage state. This means the Shift terminal will go from either 0VDC to 12VDC or from 12VDC to 0VDC
depending on the Shift Output Mode setting. The Shift Terminal will return to the normal state three tenths of a second after
changing to the opposite state. This completes a Shift on time.
If the Shift mode was set for an RPM shift the Mega 350/450 will check the engine RPM against the Shift Point setting for
twenty seconds after the Transbrake releases. When the engine RPM reaches the Shift Point setting the shift terminal will
change to its opposite voltage state. This means the Shift terminal will go from either 0VDC to 12VDC or from 12VDC to
0VDC depending on the Shift Output Mode setting. The Shift Terminal will return to the normal state once the engine RPM
drops 100 RPM below the Shift Point. This completes a Shift on RPM.
The Pro Mode Tach and Peak RPM Recall
If the engine is turned off and the number 9 key is pressed and held, the Peak RPM will be displayed in place of the
Shift point. Pressing and releasing the number 7 key will clear the current Peak RPM value. If the selection arrows are on any
line, except line 1, and the engine is on the Shift Point will be replaced by the Tach and the current engine RPM on the display.
If the selection arrows are on line 1 the Shift Point will be displayed whether the engine is on or off.
Understanding Common Pro and Bracket Mode Settings
When in Pro mode the
S.F.O
. works the same as in Bracket mode and is explained in
Understanding the S.F.O.
With
one exception, which is if the S.F.O. mode is set to 1 (S.L.E.). Only the Pro S.L.E. setting of 22.22 will work. If the S.L.E. is
set to any other number, the S.L.E. will automatically be turned off when in Pro mode.
Note:
Setting the S.F.O. mode to 2 will allow the use of the second 4 Stage timer (Timer 2) when in Pro mode. This means
the Mega 350/450 can control two separate throttle stops solenoids when in Pro mode. However the 4 Stage timer setting can
only be changed by returning to Bracket mode.
There are also two separate ways to utilize a 4 Stage timer when using only one throttle stop solenoid.
1)
Connect the throttle stop solenoid to the S.F.O. terminal and make all time adjustments by returning to Bracket modes
screen five.
2)
Connect the throttle stop solenoid to the T-Stop terminal and then add a jumper wire between the S.F.O. and T-Stop
terminals. Next on Bracket screen 5 set the first and second stage times to zero. Then enter the desired times for the
third an fourth stage times. Any further changes to stages 3 and 4 will require returning to this screen for the change.
Next go back to the Pro screen and enter the desired times for stages 1 and 2. Using this split set up will allow the
adjustments of stages 1 and 2 without leaving the Pro screen. Keep in mind that both Throttle modes for Timer 2 and the
Pro screen 2 stage timer must be set the same.
The only difference in the operation of the
P.T.S.O.
in Pro mode, is the
P.T.S.O. time is subtracted from the Pro Screen’s 2
Stage Timer instead of Timer 1 as explained in
Understanding Bracket mode
.
Because the shifter connected to the Mega 350/450 Shift terminal does not change in operation between Bracket racing and
Pro Light racing there is no need to adjust the Shift Output Mode when switching between Bracket and Pro mode. The only
place that the Shift Output Mode can be changed is when viewing the first Shift Point in Bracket Mode.
