User Guide M211095en-h



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wndAvg and wndGustTime
parameters. Set the
wndVector parameter to 0 to use scalar averaging.
The command also fetches the WMT700 status, the averaging time for average and peak wind speed and wind direction, and signal quality.
More Information
‣ WS425 F/G ASOS Data Message (page 140)
5.21.1.2 WS — Fetch Internal Diagnostics Information
This command requests the verbose Built-In Test (BIT) results.
WS
The command gives a textual rundown of the results of all Built-In Tests (BITs). In every line,
except the bad reading counter, the pass/fail indication is given with the single character P
or F. This is followed by the description of the measured parameter, which is followed by the actual measured value.
The Bad 1 second readings counter is a running total of the number of fundamental second readings that the sensor flagged as bad. This number rolls over to zero after reaching the count value of 65535. It is initialized to zero on each power-up or any other activity that performs a re-initialization of the sensor. The time measurement quality indices are given for path numbers as follows:
• Path 0 is from south transducer to north transducer
• Path 1 is from north transducer to south transducer
• Path 2 is from north transducer to east transducer
• Path 3 is from east transducer to north transducer
• Path 4 is from east transducer to south transducer
• Path 5 is from south transducer to east transducer
Chapter 5 – Operation
137

A listing for the command response is given below with representative values.

P Heater voltage 22.3 Volts
P Array heater resistance 4.9 Ohms
P Heaters off voltage 0.1 Volts
P Incoming supply voltage 12.2 Volts
P 5.0 volt supply 5.05 Volts
P 10 volt supply 10.2 Volts
- Bad 1 second reading counter 0
P Path 0 signal quality index 99
P Path 1 signal quality index 99
P Path 2 signal quality index 99
P Path 3 signal quality index 99
P Path 4 signal quality index 99
P Path 5 signal quality index 99
The test limits for the various tests areas listed below:
• Heater voltage good in range 18.0 to 26.0 V
• Array heater resistance good in range 4.0 to 6.0 Heaters off voltage good if below 0.5 V
• Incoming supply voltage good in range 10.5 to 13.5 V V supply good in range 4.5 to 5.5 V V supply good in range 9.0 to 11.0 V
• Signal Quality Index good above 50 5.21.1.3 WT - Request Short Response BIT Results and Status
The command
WT requests the short response built-in test (BIT) results and status. The command format:
WT CR LF
The response:
Byte 1
STX start of text ASCII control character
Byte W sensor ID
Byte T command identifier
Byte P or F for heater voltage pass or fail
Byte XXX format heater voltage (volts RMS)
Byte P or F for array heater resistance pass or fail
Byte XX or XX. (format as required) for array heater resistance (ohms)
Byte P or F for pass or fail on heater off voltage
WMT700 User Guide
M211095EN-H
138

Byte XX format heater off voltage (volts RMS)
Byte P or F for pass or fail thermistor temperature
Bytes 18-20
Thermistor temperature (degrees Celsius)
Byte P or F for incoming supply voltage pass or fail
Byte XXX format incoming supply voltage (volts DC)
Byte P or F for 5 volt supply pass or fail
Bytes XXX format 5 volt supply voltage (volts DC)
Byte P or F for 10 volt supply pass or fail
Bytes XXX format 10 volt supply voltage (volts DC)
Byte ASCII hyphen character (Bytes 36-40
XXXXX format bad 1 second reading counter
Byte P or F for path 0 Signal Quality Index pass or fail
Bytes XX format path 0 Signal Quality Index
Byte P or F for path 1 Signal Quality Index pass or fail
Bytes XX format path 1 Signal Quality Index
Byte P or F for path 2 Signal Quality Index pass or fail
Bytes XX format path 2 Signal Quality Index
Byte P or F for path 3 Signal Quality Index pass or fail
Bytes XX format path 3 Signal Quality Index
Byte P or F for path 4 Signal Quality Index pass or fail
Bytes XX format path 4 Signal Quality Index
Byte P or F for path 5 Signal Quality Index pass or fail
Bytes XX format path 5 Signal Quality Index
Bytes XX hexadecimal ASCII for modulo 256 checksum for Character positions 2 through Byte 61
ETX end of text ASCII control character
Byte ASCII carriage return control character
Byte ASCII linefeed control character WD - Report Status of Built-in Tests
The command
WD reports the status of the built-in tests (BIT. The command offers a concise report on the pass/fail status of all BITs. The command format is:
WD CR LF
The response:
Chapter 5 – Operation
139


STX WD PPPPPPPPPPPP CS ETX CR LF
STX
ASCII start of test control character (position 1)
WD
Command identifier (positions P or F
Pass/Fail for 12 built in tests specified in WS command above in the order shown in the
WS command text (positions 4-15) except Thermistor temperature.
CS
Modulo 256 hexadecimal checksum of all characters from position 2 through the last P
or F (positions 16,17)
EXT
ASCII end of text control character (position 18)
CR
ASCII carriage return control character (position 19)
LF
ASCII linefeed control character (position 20)
5.21.1.5 WF - Return Fixed Pattern of Data
The WF command returns a fixed pattern of data. This command can be used to verify the communications link. The command format is:
WF CR LF
The data fields are fixed at the following values:
Status
F
Wind direction
678
Peak wind direction
567
Wind averaging time
21
Peak wind averaging time
09
Wind speed
876.5
Peak wind speed
432.1
Example of


Document code
Testsetup according to
More information
Optiontemperature range
Optionheating
Optionhardware interface
Optionunit used
Optionoutput configuration
Selectionoutput configuration
Optionadapter type
Optionaccessories
Order codedescription
Aout1 selected option
Output signal
Swnddiroffset,(angle)
Parameterdefinition
Power supplywire colors
Used heating option
Heating option
Wire type/cable length
Descriptionspare part item
Wmt700connector pin
Open commandto activate the command, press enter
Commanddescription
Wind_getfetches wind calibration information.more information
S command. power must be on for at least 5 seconds after the s
Startcommand.more information
Itemdescription
Bitdescription
G command to fetch the current wmt700 parameters. disable error messages with the command s messages,0
Errors. if all values are valid, wmt700 sends the following response:0,0,0,0you can also use the g
Data message number
Ws425 and sdi messages
Parametername
Parameterdefault
Start command.to stop measurement, use the stop
Wb,wfirmware
Wf output:wff6785672109876.5432.1k99xx5.21.2 ws425 f/g asos data messagewmt700 responds to the wa
Bytedescription
Parameterdefault value
Id character
Wx command with a character fixed-length data message.character
Start command. to stop measurement, use thestop
Problemprobable cause
Error/eventcode
Parameter name
Propertydescription/value
Analog outputs for wind direction
Itemorder code
Configuration mode / measurement
Settingparameter
Start command. you can stop the measurement with the stop
Example of the command and response:
Baud........................................................................ 105clearerr
S............................................................................... 103sleep
Gget message. get parameter.........................................................104h
Jjunction box...............................................................28l



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