Moog Crossbow NAV440 Series - Manual (Page 66)

Page 66
NAV440 User Manual
7430‐0131‐01 Rev. F
Echo Payload Contents
Byte
et Offs
Name Format Scaling Units Description
N‐2 echoData... U1 — — Second to last byte of echo data
N‐1 echoData… U1 — — Last byte of echo data
Interactive Commands
Interactive commands are used to interactively request data from the 440 Series unit, and to calibrate or reset the
unit.
Get Packet Request
Table 18 Get Packet Request
Get Packet (‘GP’ = 0x4750)
Preamble Packet Type Length Payload Termination
0x5555 0x4750 0x02 <GP payload> <CRC (U2)>
This command allows the user to poll for both measurement packets and special purpose output packets including
0 T
, VR, and ID.
Table 19 GP Payload
GP Payload Contents
Byte
ffset O
Name Format Scaling Units Description
0 requestedPacketType U2 — — The requested packet type
Refer to the sections below for Packet Definitions sent in response to the ‘GP’ command
Algorithm Reset Command
Table 20 Algorithm Reset Command
Algorithm Reset (‘AR’ = 0x4152)
Preamble Packet Type Length Payload Termination
0x5555 0x4152 0x00 — <CRC (U2)>
This command resets the state estimation algorithm without reloading fields from EEPROM. All current field values
will remain in effect. The unit will respond with an algorithm reset response.
Algorithm Reset Response
Table 21 Algorithm Reset
Algorithm Reset (‘AR’ = 0x4152)