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Condition
– sets the logic operator to compare the alarm threshold with the current channel value. Options
are:
•
Equal to (=)
•
Not equal to (<>)
•
Less than (<)
•
Less than or equal to (<=)
•
Greater than (>)
•
Greater than or equal to (>=)
Threshold
– sets the alarm value of the channel.
RPM threshold
– Sets the minimum engine speed at which the alarm can be triggered.
TPS threshold
– Sets the minimum throttle position at which the alarm can be triggered.
Validation period
– sets the minimum period (in seconds) that the alarm condition must remain true before
the alarm will be triggered.
Duration
– In the event of multiple alarm triggers, this value sets the time that each alarm is visible before
the next alarm is shown.
Persistence
– If a channel value exceeds the alarm threshold for a very short period of time, the alarm can
be held on screen for this persistence time. This may be useful to allow the driver time to read the details of
a transient alarm condition before it becomes more serious.
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12. Auxiliary outputs
The Geartronics G-Dash has two auxiliary output pins that
may be used to drive relays, lamps and LEDs. They
may also be used to connect to digital inputs of other devices. Both pins have open-collector outputs, meaning that
they are open-circuit when not active and switched to ground when active. They are capable of switching loads up to 2
Amps with a supply voltage up to 12v.
Note: when connecting to digital inputs of other devices it’s necessary to use a pull-up resistor on the input.
The input pin on the other device may already have an internal pull-up, but if not then you will need to
connect an external resistor between the input and 5v, or alternatively 1kohm hardware pull-ups can be
enabled by soldering links on the PCB. Please refer to appendix section 16.
12.1 Configuring Aux outputs
Click on the
Aux Outputs
tab at the top of the main window. Click the Usage box and select either “Alarm”
or “Compare Channel” from the drop-down list. When set to Alarm, the output will be activated whenever
and while ever any alarm is active. When set to “Compare Channel”, the output is activated when the
selected channel condition is satisfied. Any available channel can be used to conditionally switch an output
and is selected from the drop-down list.
Shown below is a typical example of an auxiliary output use:
In this example, Aux1 output is being used to drive a shift light. The shift light will only be switched on when
the engine RPM is equal to or greater than 5300rpm
AND
the selected gear is less than 5 (top gear).
Conditions can be based on either one or two channels. When two channels are used, they are connected
with a logical AND/OR function.
