2020-08-26
GCU7 Manual
27
XII.
SEQUENTIAL GEARBOX – QUICKSTART
Please note: if any parameter is changed, settings must be sent to the GCU (Settings – send to GCU or
Send Changes to GCU - F5) in order to take effect.
After successfully connected to the GCU7 (green bottom bar in the software), go to the
GENERAL/SENSORS
tab and:
Select
GEARBOX Type
to Sequential.
Under
GEARBOX Function
, Select Standalone if you want the GCU to take care of the cutting,
blip signal and every other operation needed to shift. If you have Engine ECU capable of
complete paddle shifting logic, use Ext. Logic. Please note: if you only do the cutting with Engine
ECU, you still need the Standalone, because GCU7 will still need to send a signal to cut.
Adjust
NEUTRAL SENSOR
and
CLUTCH SENSOR
accordingly. If you will shift with the paddles
from N->R, R->N, N->1 or 1->N you need to enable this switch. For more info setting the clutch
sensor see GENERAL/SENSORS in chapter II.
Verify that all connected inputs are working correctly. In the top right corner you can see if
GCU7 sees the signals. Inputs to look for and: UP paddle, DOWN paddle, Neutral*, Clutch*.
Verify the
UP
,
DOWN, BLIP
and
Ignition
CUT
outputs by pressing the output tests. Please note
that if you're using engine ECU to do Ignition CUT and Blip, you need to connect wires G2
(White/black) for the Ignition CUT and J2 (Yellow/Pink) for the throttle blip and configure them
accordingly in the ECU software. They're active low which means that they close to ground
when they're active.
Enter number of gears and gear ratios in the
GEARBOX
group and go to
DOWN
tab and adjust
the
Max engine RPM
parameter. This is the absolute maximum engine rpm you will able to
reach when downshifting. Go back to the
GENERAL/SENSORS
tab.
If you use pressure sensor (usually not the case), enable the
AIR PRESSURE SENSOR
and enter
max sensor pressure. Currently, we only support 4-20 mA sensors (connected to GCU7 pin A1).
Adjust
TACHO SENSOR
and
TPS
, including the TPS Calibration process if needed (
Calibrate
button). Make sure the RPM and TPS are working properly. For more info see
GENERAL/SENSORS in chapter II.
Under
GEAR POSITION SENSOR
click the
Calibrate
button and follow the instructions to
calibrate the position sensor. What this will do is it will ask you to go through all gears and store
the position to each gear. You can then adjust the tolerance or gear position values for each
gear by entering the number of degrees in the dropdown. Clicking on the
<
next to the gear will
store current gear position value into the field.
