Vaisala WINDCAP WS425 Guide de l'utilisateur télécharger pdf (Page 56)

User's Guide ______________________________________________________________________

54 ______________________________________________________________________________

WT Command

This command requests the short response BIT results and status. The

command format is:

WT CR LF

This command is an abbreviated version of the verbose BIT results and

status command. Field descriptors are omitted and only pass/fail status

and measured value are reported. The command response is packed in

the standard STX – body – CSUM – ETX format. The response is

shown below.

Byte 1: STX start of text ASCII control character

Byte 2: W sensor ID

Byte 3: T command identifier

Byte 4: P or F for heater voltage pass or fail

Byte 5-8: XX.X format heater voltage (volts RMS)

Byte 9: P or F for array heater resistance pass or fail

Byte 10-12: X.X or XX. (format as required) for array heater

resistance (ohms)

Byte 13: P or F for pass or fail on heater off voltage

Byte 14-16: X.X format heater off voltage (volts RMS)

Byte 17: P or F for pass or fail thermistor temperature

Bytes 18-20: Thermistor temperature (degrees Celsius)

Byte 21: P or F for incoming supply voltage pass or fail

Byte 22-25: XX.X format incoming supply voltage (volts DC)

Byte 26: P or F for 5 volt supply pass or fail

Bytes 26-29: X.XX format 5 volt supply voltage (volts DC)

Byte 30: P or F for 10 volt supply pass or fail

Bytes 31-34: XX.X format 10 volt supply voltage (volts DC)

Byte 35: ASCII hyphen character (-)

Bytes 36-40: XXXXX format bad 1 second reading counter

Byte 41: P or F for path 0 Signal Quality Index pass or fail

Bytes 42-43: XX format path 0 Signal Quality Index

Byte 44: P or F for path 1 Signal Quality Index pass or fail

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 90 91

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Vaisala WINDCAP WS425 Guide de l'utilisateur Page 56