Instruction Manual

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Page92
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GNAV540UserManual
7430‐0808‐01Rev.B
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SetFieldsCommand
Table66SFCommands
SetFields(‘SF’=0x5346)
Preamble PacketType Length  Payload Termination
0x5555 0x5346 1+numFields*4 <SFpayload> <CRC(U2)>
Thiscommandallowstheusertosettheunit’scurrentconfiguration(SF)fieldsimmediatelywhichwillthenbelost
onpowerdown.
NumFieldsisthenumberofwordstobeset.Thefield0,field1,etc.arethefieldIDsthatwillbe
writtenwiththe
field0Data,field1Data,etc.,respectively.Thiscommandcanbeusedtosetconfigurationfields.The
unitwillnotsetcalibrationoralgorithmfields.Ifatleastonefieldissuccessfullyset,theunitwillrespondwithaset
fieldsresponsecontainingthefieldIDsofthesuccessfullysetfields.Ifanyfieldisunabletobeset,theunitwill
respondwithanerrorresponse.
Bothasetfieldsandanerrorresponsemaybereceivedasaresultofonesetfieldscommand.Settingafieldwithan
invalidvaluewillgenerateanerrorresponse.ToviewatableoffieldIDsandvalidfieldvalues,referto
ConfigurationFieldsonpage85.
Table67SFPayload
SFPayloadContents
ByteOffset Name Format Scaling Units Description
0 numFields U1 — — Thenumberoffieldstoset
1 field0 U2 — — ThefirstfieldIDtoset
3 field0Data U2 — — ThefirstfieldID’sdatatoset
5 field1 U2 — — ThesecondfieldIDtoset
7 field1Data U2 — — ThesecondfieldID’sdatatoset
… … U2 — — …
numFields*4‐3 field… U2 — — ThelastfieldIDtoset
numFields*4‐1 field…Data U2 — — ThelastfieldID’sdatatoset
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WriteFieldsResponse
Table68WFResponse
WriteFields(‘WF’=0x5746)
Preamble PacketType Length  Payload Termination
0x5555 0x5746 1+numFields*2 <WFpayload> <CRC(U2)>
Theunitwillsendthispacketinresponsetoawritefieldscommandifthecommandhascompletedwithouterrors.
Table69WFPayload
WFPayloadContents
ByteOffset Name Format Scaling Units Description
0 numFields U1 — — Thenumberoffieldswritten