4.3811.00.000_US-Anemometer-DSP_eng.doc
16 - 26
021511/10/06
Where
g: wind
velocity
h:
standard deviation of wind velocity
d: wind
direction
e:
standard deviation of wind direction
t: temperature
u:
standard deviation of temperature
s: status
byte
c:
check sum (EXOR link)
v:
identifier for scaling of wind velocity (K, N, M, S = km/h, Knots, m/s, mph)
a:
wind velocity in X-direction (east -> west)
b:
wind velocity in Y-direction (north -> south)
w:
status byte version 1
f:
check sum version 1
i: device
ID
7.4
Generation of check sum
The check sum is the result of the bytewise EXOR link of the bytes output in the telegram.
With the resulting check byte high and low nibble (4 bit) are EXOR linked and output as an ASCII
value.
7.5 Status
information
7.5.1 Definition of status byte version 1
The status byte contains information about the current system status.
The information includes the occurrence of an error with the acquisition of measured values,
possible decalibration, e.g. caused by a change in the measurement path length due to deformation
of the measuring arms and the operating status of the device heating.
7.5.2 Structure of status byte version 1
Bit 0 0 = data valid 1 = data invalid
Bit 1 Temperature difference between X and Y measurement path (LSB)
Bit 2 Temperature difference between X and Y measurement path (MSB)
Bit 3 Averaging memory used (LSB)
Bit 4 Averaging memory used (MSB)
Bit 5 Measuring range exceeded (counter overflow)
Bit 6 Reserved (always one)
Bit 7 0 = heating off 1 = heating on
