Moog Crossbow NAV440 Series - Manual (Page 90)

Page 90
NAV440 User Manual
7430‐0131‐01 Rev. F
Read Fields Command
Table 73 Read Fields
Read Fields (‘RF’ = 0x5246)
Preamble Packet Type Length Payload Termination
0x5555 0x5246 1+numFields*2
This command allows the user to read the default power‐up configuration fields from the EEPROM. NumFields is the
number of fields to read. The field0, field1, etc. are the field IDs to read. RF may be used to read configuration and
calibration fields from the EEPROM. If at least one field is successfully read, the unit will respond with a read fields
response containing the field IDs and data from the successfully read fields.
If any field is unable to be read, the unit will respond with an error response. Note that both a read fields and an
error response may be received as a result of a read fields command.
Table 74 Read Fields Contents
RF Payload Contents
Byte Offset Name Format Scaling Units Description
0 numFields U1 — — The number of fields to read
1 field0 U2 — — The first field ID to read
3 field1 U2 — — The second field ID to read
… … U2 — — More field IDs to read
numFields*2 ‐ 1 Field… U2 — — The last field ID to read
Read Fields Response
Table 75 Read Fields Response
Read Fields (‘RF’ = 0x5246)
Preamble Packet Type Length Payload Termination
0x5555 0x5246 1+numFields*4
The unit will send this packet in response to a read fields request if the command has completed without errors.
Table 76 Read Fields Payload Contents
RF Payload Contents
Byte Offset Name Format Scaling Units Description
0 numFields U1 — — The number of fields read
1 field0 U2 — — The first field ID read
3 field0Data U2 — — The first field ID’s data read
5 field1 U2 — — The second field ID read