Purpose: Main RPM and sync reference for engine position
Common Source: VR sensor on crankshaft or flywheel
Options:
Choose Functionality (e.g., “Crank Ref”) This input can be used for several different signals.
Edge: Select rising or falling signal edge
Plot: Opens live signal graph to assist with polarity and tooth profile tuning
Check this video to Learn a little bit more about the trigger plotter and Trigger Edges
Click HERE
Proper polarity and edge selection is critical for accurate timing. Use “Plot” to confirm tooth waveform behavior.
This Input has it's own Threshold Voltage table to manually configure the signal (see below), very useful for noisy signals.
Example Use: Secondary CAM sensor (e.g., CAM 2) or any digital switch/signal.
Edge: Typically rising edge for Hall sensors
This Input doesn't have a pullup and/or Pulldown, it requires an external 1k resistor for pullup/pulldown in case the sensor you're connecting to it is Open Collector
Speed: Calibration speed, write down the speed you gonna drive at, sellect the unit, km/h or mph, drive at that speed and click on the Learn Button to learn the number of pulses per meter.
Pulses per meter: Defines the signal, this represents the number of pules the ecu will read per meter of distance travelled, use the button Learn to automaticly learn this or if you have the information, just set it up.
Assign your VR/CAM inputs to "Traction Speed Sens" to link them to this section.
For all inputs, correct rising/falling edge configuration is crucial for:
Timing accuracy
Sync detection
Clean trigger decoding
Edge
Description
Rising
Trigger on signal going from low → high
Falling
Trigger on signal going from high → low
Use the Plot button on Crank VR to validate which edge shows consistent signal patterns.
Check this video to Learn a little bit more about the trigger plotter and Trigger Edges
Click HERE
Threshold Voltage: Defines the minimum voltage required for the selected edge to register as a valid trigger
¶ Crank VR Signal Threshold Table – RPM vs Voltage
This screen allows you to configure the threshold voltage levels that the ECU uses to detect a valid signal from a VR (variable reluctance) crank sensor, based on engine RPM.
VR sensors generate an analog sine-wave signal whose amplitude increases with RPM. To interpret this signal as digital "edges", the ECU must decide when the signal is high enough to be considered valid. This is what the Threshold Voltage defines.
Low RPM = low signal voltage → low threshold
High RPM = high signal voltage → higher threshold
This table ensures the ECU tracks the VR signal cleanly at all speeds without false triggering due to noise or missed detection due to too high a threshold.