High Country Tek emc-3L - Manual (Page 31)

The following gives the definition as well as an overview of each of the fields in the Universal Input screen not
covered in the Analog Inputs section.
Input Type
Contains all the configuration selections for the universal input
Range: Analog Input, RPM Pulse Input, Counter Mode, and Quadrature Mode
Input Range
Select the range of the input voltage or current for the Input
Range: 0 volts to 5 volts, Volts to 10 Volts, -1 volt to 1 Volt, and 0 milliamps to 22 milliamps
Pulses Per Rev
The amount of pulses the processor will detect in one revolution
Range: 1 to 9999
Pulse Time Out / Loss of Signal (.LOS)
The amount of time it takes before turning RPM to 0 in RPM mode and/or setting the name.LOS flag if no pulses
are detected for RPM, Counter and Duty Cycle modes.
Range: 0 to 10.0 seconds
Count Limits
The max and min value for the pulse counter.
Min: 0 to 65535
Max:
0 to 65535
Duty Cycle Input High / Low
The Duty Cycle Input High / Duty Cycle Input Low feature of the Universal inputs is intended to read the
percentage of Duty Cycle Output from either an ECM or other sensor that uses a 0 – 5 Volt or System Voltage
Duty Cycle output to report its information. The advantage of this type of input is that changes in system voltage
do not affect the output state of the sensor. The State of the input is reported to the application code as a 10 bit
number (i.e. Engineering Units) and reported to the PLM as a percentage. It will automatically read PWM signals
from 30 Hz to 1.5 KHz. Duty Cycle High assumes that a high voltage with no pulses would be 100% and Duty
Cycle Low assumes that a ground at the input would be 100%. When using the Duty Cycle Input feature, the
application should monitor the name.LOS flag to ensure that the signal received by the external sensor is valid
and current. During the event of an invalid signal, the application programmer may then decide what action to
take.
Range: 5% to 95%
Universal Input Code Sample
Code Comments
If (Uni_1 > 5%) Then Test to see If Input % is greater than 5%
PWM_1 = Uni_1 Sets an PWM% output to the Analog Input %
PWM_1.Dir = Uni_1.Dir Set direction of a dual coil based Input (if center enabled)
If( Uni_1.MaxF) then Test Maximum Volts threshold reached
If (Uni_1.RealRPM > 500) then Test Actual RPM > 500 RPM
Uni_1.MaxVolt = Uni_1.RawVolts Set voltage max to volts seen (Calibration Example)
If (Uni_1.LOS) then Test loss of signal (pulse input only)
Uni_1.Counter = 512 Set counter to value (Counter or Quadrature type only)
P/N: 021-00163, Rev. A.0 - for V5.2 Tools Page | 31