Campbell CS475, Инструкция по эксплуатации

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Appendix C. SDI-12 Commands/ Changing Settings
C-8
C.1.9 Send Identification Command
The aI! command gets the following identification information in response to
sending aI! (see TABLE C-10 ).
• Compatibility level: Version of SDI-12 protocol version; for example,
1.3.
•
Manufacturer’s Name: VEGA
• Manufacturer’s Model Number: PS61 (CS475), PS62 (CS476), or
PS63 (CS477)
•
Three Digit Firmware Version Number.
• Eight Digit Serial Number of Sensor.
TABLE C-10. Send Identification Command
Initial Command Response
aI! a13VEGAbbbbPS6233212345678<cr><If>
Where (from left to right),
a—sensor address;
13—SDI-12 compatibility number;
VEGA = Manufacturer’s Name;
PS62 = Manufacturer’s Model Number;
3.32 = Sensor Version Number;
Serial Number = 12345678.
C.1.10 Start Verification Command
The
aV!
command requests three verification values from the sensor. This
command is always followed by the aD0! ( Send Data ) command.
The verification values that will be returned are:
•
CRC check (error check)—values are 0 (OK) or 1 (failed)
• SDI-12 Radar firmware version number
•
HART Sensor firmware version
TABLE C-11 shows an example of checking the CRC.