Moog Crossbow VG700MB Series - Manual (Page 19)

VG700M User’s Manual
Doc.# 7430-0280-01 Rev. F Page 13
Table 2 Bit Message Definition (VG700MB-206 Only)
BIT Data Description Bit
Location
Accelerometer
Failure Accelerometer outputs are incorrect Bit 2
Gyro Zeroing
Validity Gyro Zeroing invalid Bit 4
Gyro Zeroing
Process Gyro Zeroing in process Bit 5
Not valid Bits 6,7: 00
Pitch and Roll outputs computed
using only accelerometers Bits 6,7: 10
Not used Bits 6,7: 01
Algorithm
Validity Status
Full accuracy data using gyros and
accelerometers Bits 6,7: 11
Notes:
1) The Algorithm Validity Status BIT is updated every transmitted serial
packet.
2) The Accelerometer Failure BIT is only updated after the BIT self-test is
executed.
3) The Gyro Zeroing Validity BIT defaults to the high condition upon
power up or any restart of the system. The Gyro Zeroing Validity BIT will
stay high signifying an invalid gyro zeroing result. Performing another
gyro zeroing can reset the BIT, so the gyro zeroing should be repeated until
this bit stays low. If the previous zeroing performed was successful, the
user may choose to ignore the Gyro Zeroing Validity BIT.
Examples:
BIT Byte
Interpretation
11000000 Pitch and roll at full accuracy; everything OK
01000000 Angles based on accelerometer only; everything OK
11010000 Pitch and roll at full accuracy; Gyro zeroing invalid; Accels OK.