NavCom LAND-PAK Rev.N - Manual (Page 111)

Technical Reference Manual Rev. N
Blk = All; Blu = IOP w/Internal Radio ; Red = IOP & LBM ; Grn = Engine only
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The “middle” blocks are a dump of the file and are defined as follows:
Record
Usage Command -
Response - Input:
Output:
Ref Message Field Description Data Type Units Range Scale
Byte
Count
STX 02 (hex) U08 1
PRA1 99 (hex) U08 1
PRA2 66 (hex) U08 1
ID 0x7f U08 1
Length 0x0212 (Max Length 530 bytes) U16 2
W1 Data Channel U08 1
W2 Spare U08 1
W3
Sequence Count
Sequence item 0x00000000 and
0xffffffff have special meaning.
Otherwise, Sequence block
number (1 to n).
U32 4
W4 File Size U32 bytes 4
W5 Data Payload U08[512] 1[512]
CKSM Checksum U08 1
ETX 03 (hex) U08 1