PX4 parameter group: Failure Detector

This page lists named parameter set commands in the PX4 Failure Detector group. All commands use PARAM_SET and are governed by PX4_COMMAND_MODE, operator guard, and PX4_PARAMETER_WRITE_ALLOWLIST.

Metric	Count
Parameters	9
`FLOAT`	4
`INT32`	5
`Standard`	9
`System`	0
`Developer`	0
Reboot required	1
`volatile`	0

Parameters

PX4 Parameter	Command type	Category	Type	Default	Range	Unit	Shape	Reboot	Volatile	PX4 short description
`FD_ALT_LOSS`	`px4.parameter.fd_alt_loss.set`	Standard	Float	0.0	0.0..200.0	m	-	no	no	Altitude loss threshold for termination and parachute deployment
`FD_ALT_LOSS_T`	`px4.parameter.fd_alt_loss_t.set`	Standard	Float	1.0	0.02..5.0	s	-	no	no	Altitude loss failure trigger time
`FD_EXT_ATS_EN`	`px4.parameter.fd_ext_ats_en.set`	Standard	Int32	0	-	-	enum 2	yes	no	Enable PWM input from external ATS for failsafe
`FD_EXT_ATS_TRIG`	`px4.parameter.fd_ext_ats_trig.set`	Standard	Int32	1900	-	us	-	no	no	External ATS PWM threshold for failsafe
`FD_FAIL_P`	`px4.parameter.fd_fail_p.set`	Standard	Int32	60	0..180	deg	-	no	no	FailureDetector Max Pitch
`FD_FAIL_P_TTRI`	`px4.parameter.fd_fail_p_ttri.set`	Standard	Float	0.3	0.02..5.0	s	-	no	no	Pitch failure trigger time
`FD_FAIL_R`	`px4.parameter.fd_fail_r.set`	Standard	Int32	60	0..180	deg	-	no	no	FailureDetector Max Roll
`FD_FAIL_R_TTRI`	`px4.parameter.fd_fail_r_ttri.set`	Standard	Float	0.3	0.02..5.0	s	-	no	no	Roll failure trigger time
`FD_IMB_PROP_THR`	`px4.parameter.fd_imb_prop_thr.set`	Standard	Int32	30	0..1000	-	-	no	no	Imbalanced propeller check threshold