Ecumaster ADU-5 - Digital Inputs

Digital inputs
Digital inputs are used for reading digital signals such as signals from crankshaft position
sensors, wheel speed sensors or an ethanol sensor (FlexFuel). They can also be used as inputs
for buttons connected to ground.
To add an digital input, add the Digital input object in Project tree. The configuration pane is
comprised of the following options:
Parameter Description
Name The name of the digital input that will be used as the channel name in the
project
Input pin The number of the analogue input to which the configuration relates
Type The function that the analogue input is to perform:
Switch – active low – the digital input will function as a switch (button)
activated with a low state,
Switch – active high – the digital input will function as a switch (button)
activated with a high state,
Frequency – the digital input will measure the signal frequency
RPM – the digital input will decode the signal from the crankshaft /camshaft
position sensor in order to measure the vehicle engine speed. Only D1
input can be used to measure the engine speed.
Flex Fuel – a digital input used for reading the content of ethanol in fuel and
the fuel temperature from the FlexFuel sensor. Only the D2 input can
cooperate with the FlexFuel sensor. The values read from the sensor are
stored in the following channels: adu.ff.ethanolContent,
adu.ff.fuelTemperature, adu.ff.sensorStatus
Beacon - a digital input used for decoding the signal from an AIM Beacon.
The D2 input is compatible with an AIM beacon.
Enable pullup Activates an internal pullup resistor for a given input.
Threshold A reference voltage which, when exceeded, results in a change of the input
state from 0 to 1 (and the other way around). When using VR sensors this
value will be smaller than 1V. When using the Hall effect / optical sensors
this value will equal 2.5V.
Debounce time When using a Switch-type input, this parameter determines the time
needed to stabilize the switch contacts
Trigger edge The signal edge to be used when reading a signal
Number of teeth When using an RMP signal - a physical number of teeth on a toothed wheel
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