90
seconds)
40 R4 Scale change (ppm) 0.0 ~ 50.0
CFG – DAT (0x06 0x06)
It’s an output message. Poll the current datum. If the datum number is –1, the module
is using the user-defined datum and only the value for semi-major axis is valid and the
rest of them are not valid.
Header ID Data Length Data Checksum
0xB5 0x62 0x06 0x06 52 See below CK_A CK_B
Data
Offset bytes Format Descriptions Notes
0 U2 Datum number
2 CH[6] Datum name ASCII format
8 R8 Semi-major axis (m) 6,300,000.0 ~ 6,500,000.0
16 R8 1.0/flattening 0.0 ~ 500.0
24 R4 Offset from the origin – X axis
(m)
-5000.0 ~ 5000.0
28 R4 Offset from the origin – Y axis
(m)
-5000.0 ~ 5000.0
32 R4 Offset from the origin – Z axis
(m)
-5000.0 ~ 5000.0
36 R4 Rotation about X axis (milli-arc
seconds)
-20.0 ~ 20.0
40 R4 Rotation about Y axis (milli-arc
seconds)
-20.0 ~ 20.0
44 R4 Rotation about Z axis(milli-arc
seconds)
-20.0 ~ 20.0
48 R4 Scale change (ppm) 0.0 ~ 50.0
