Instruction Manual

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age70
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GNAV540UserManual
7430‐0808‐01Rev.B
P
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calibrationRequest Description
calibrationcommand.
0x000E
Writemagneticcalibration.Theunitwillwritetheparametersto
EEPROMandthensendacalibrationresponse.
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CalibrateAcknowledgementResponse
Table27CalibrateWCACKResponse
Calibrate(‘WC’=0x5743)
Preamble PacketType Length  Payload Termination
0x5555 0x5743 0x02 <WCpayload> <CRC(U2)>
Theunitwillsendthispacketinresponsetoacalibraterequestiftheprocedurecanbeperformedorinitiated.
Table28WCPayload
WCPayloadContents
Byte
ffset
O
Name Format Scaling Units Description
0 calibrationRequest U2 — — Therequestedcalibrationtask
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CalibrationCompletedParametersResponse
Table29CalibrationCompleted
CalibrateCompleted(‘CC’=0x4343)
Preamble PacketType Length  Payload Termination
0x5555 0x4343 0x08 <CCpayload> <CRC(U2)>
Theunitsendsthispacketafteracalibrationhasbeencompleted.Currently,thereisonlyonemessageofthistype
sentafteramagneticcalibrationhasbeencompleted(withorwithoutautomatictermination)andtheparameters
havebeencalculated.ThecalibrationRequestfieldwillbe0x000Bor0x000C.
Table30CCPayloadContents
CCPayloadContents
Byte
ffset
O
Name Format Scaling Units Description
0 calibrationRequest U2 — — Therequestedcalibrationtask
2 xHardIron I2 2/2^16 G Thexhardironbias
4 yHardIron I2 2/2^16 G Theyhardironbias
6 softIronScaleRatio U2 2/2^16 —
Thescalingratiobetweenthex
andyaxis
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