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XAICBC — Backward Collision Threshold

Configures the acceleration threshold used to detect a backward collision event (signal F45). The threshold is the X-axis acceleration magnitude in milli-g (mg) that must be exceeded (rear impact) to raise the event.

Format​

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

Response​

>RXAICBC{VALUE}<

Examples​

>QXAICBC<        →  >RXAICBC2000<
>SXAICBC3000<    →  >RXAICBC3000<
>SXAICBC<        →  >RXAICBC2000<  (reset to default)
  • F45 — Backward collision detected (alignment gated)

Notes​

  • A lower value increases sensitivity; a higher value limits detection to severe rear impacts only.
  • All collision signals require IMU axis alignment to be complete (see XAICAR).
  • Sending >SXAICBC< 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.