Young Ultrasonic Anemometer Marine Model Model 85106 - Manual (Page 6)

Page 3
85106-90
ASCII POLAR FORMAT
a www.w ddd ss*cc
where
a = Sensor address
www.w = Wind speed (selected units)
ddd = Wind direction (degrees)
ss = Status code
* = Asterisk (ASCII 42)
cc = Checksum
= Carriage return (ASCII 13)
ASCII CARTESIAN (UV) FORMAT
a uu.uu vv.vv ss*cc
where
a = Sensor address
±uu.uu = U-axis wind speed (m/s)
±vv.vv = V-axis wind speed (m/s)
ss = Status code
* = Asterisk (ASCII 42)
cc = Checksum
= Carriage return (ASCII 13)
The CHECKSUM is the two-character printable hexadecimal value
generated by taking the exclusive-or of all characters up to the
asterisk. The STATUS CODE will show a non-zero value only when
the sensor cannot acquire sufficient samples or a measurement
error has occurred.
5.3.3 ASCII POLLED
ASCII POLLED format is the same as ASCII but sends data only
when polled. The sensor stays in low power mode until polled. The
polling command is Ma! where 'a' is the sensor address. The
default address is '0' (ASCII 48).
5.3.4 NMEA
NMEA format provides continuous wind measurements in standard
NMEA marine sentences at 4800 baud using the RS-485 output
connections. Output is sent once per second. The output data may
be used with the YOUNG Model 06206 Marine Wind Tracker or
other NMEA-capable device.
NMEA FORMAT
$WIMWV,ddd,R,www.w,N,A*cc
where
ddd = Wind direction (degrees)
www.w = Wind speed (knots)
* = Asterisk (ASCII 42)
cc = Checksum
= Carriage return, line feed (ASCII 13, 10)
The CHECKSUM is the two-character printable hexadecimal value
generated by taking the exclusive-or of all characters between '$'
and '*'.
NMEA is the default setting so that the sensor may be connected
to a Marine Wind Tracker without altering any other sensor
parameters.
5.3.5 SDI-12 CONT
SDI-12 CONT makes continuous wind measurements that may be
retrieved with SDI-12 R, M, and C commands. With R commands,
the sensor responds by sending measurement data. With M and
C commands, the sensor responds with an acknowledgement
showing zero seconds measurement delay. No service request is
sent. Data may be retrieved immediately after an M or C command
with a D command.
If an R, M, or C command includes the CRC designator, retrieved
data will contain an SDI-12 CRC checksum.
SDI-12 SENSOR
COMMAND RESPONSE
aR0! a+www.w+ddd
aR1! a±uu.uu±vv.vv
aRC0! a+www.w+ddd
aRC1! a±uu.uu±vv.vv
aM! a0002
aM1! a0002
aMC! a0002
aMC1! a0002
aC! a00002
aC1! a00002
aCC! a00002
aCC1! a00002
aD0! a+www.w+ddd
a±uu.uu±vv.vv
where:
a = Sensor address
ddd = Wind direction (degrees)
www.w = Wind speed (selected units)
±uu.uu = U-axis wind speed (m/s)
±vv.vv = V-axis wind speed (m/s)
= CRC checksum (only where requested)
= Carriage return, line feed (ASCII 13, 10)
5.3.6 SDI-12 STANDBY
SDI-12 STANDBY makes wind measurements only when
polled with an M or C command. The sensor responds with an
acknowledgement indicating that the data will be ready in one
second. With M commands, the sensor sends a service request as
soon as data are ready. Data are retrieved with D commands. If
the M or C command includes a CRC designator, retrieved data
will include a CRC checksum. After each measurement cycle, the
sensor goes into ultra-low power (320 uA) standby. Set Damping
Factor (see 6.4.9) to 0 when using SDI-12 STANDBY.
SDI-12 SENSOR
COMMAND RESPONSE
aM! a0012
aM1! a0012
aMC! a0012
aMC1! a0012
aC! a00102
aC1! a00102
aCC! a00102
aCC1! a00102
aD0! a+www.w+ddd
a±uu.uu±vv.vv
where:
a = Sensor address
ddd = Wind direction (degrees)
www.w = Wind speed (selected units)
±uu.uu = U-axis wind speed (m/s)
±vv.vv = V-axis wind speed (m/s)
= CRC checksum (only where requested)
= Carriage return, line feed (ASCII 13, 10)
5.3.7 ADDITIONAL SDI-12 INFORMATION
The 85004 sensor conforms to all aspects of the SDI-12 version
1.3 protocol and will respond to the additional commands listed
below. For further information on the SDI-12 protocol, visit www.
sdi-12.org on the web.
SDI-12 SENSOR
COMMAND RESPONSE
?! a
a! a