Eric,
Can you break down the hex a bit more?
Header = AA AA
Length = 13
ID = 54
ctrl (rw,isQueued) = 03
Params = 01 00 00 7A 43 00 00 00 00 00 00 00 00 00 00 00 00
Checksum = EB
For Params:
ptpmode = 01
x = 00 00 7A 43
y = 00 00 00 00
z = 00 00 00 00
r = 00 00 00 00
Is this correct?