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XAICFC — Forward Collision Threshold

Configures the deceleration threshold used to detect a forward collision event (signal F44). The threshold is the X-axis deceleration magnitude in milli-g (mg) that must be exceeded to classify the impact as a forward collision.

Format​

  • Query: >QXAICFC<
  • Set: >SXAICFC{VALUE}<
  • Reset to default: >SXAICFC<
FieldDescription
VALUEThreshold magnitude in mg (unsigned integer)

Response​

>RXAICFC{VALUE}<

Examples​

>QXAICFC<        →  >RXAICFC2000<
>SXAICFC3000<    →  >RXAICFC3000<
>SXAICFC<        →  >RXAICFC2000<  (reset to default)
  • F44 — Forward collision detected (alignment gated)

Notes​

  • A lower value increases sensitivity (more events detected); a higher value limits detection to severe impacts only.
  • All collision signals require IMU axis alignment to be complete (see XAICAR).
  • Sending >SXAICFC< without a value resets the threshold to its factory default.
  • Out-of-range values are rejected.
  • The threshold is persisted across reboots.

Defaults and Limits​

  • Default value: 2000 mg.
  • Valid range: 500 to 16000 mg.