Campbell TB4, Product Manual

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Appendix C. CS700H Operation Details
C-7
Sensor address (a) – a single character and the first character of the command.
Use the default address of zero (0) unless multiple sensors are connected to the
same port.
Command body – an upper case letter (the “command”), optionally followed by
one or more alphanumeric qualifiers.
Command termination (!) – an exclamation mark.
An active sensor responds to each command. Responses have several standard
forms and always terminate with <CR><LF> (carriage return and line feed).
Standard SDI-12 commands are listed in TABLE C-5 .
TABLE C-5. Campbell Scientific Sensor SDI-12 Command and
Response Set
Name Command Response 1
Acknowledge
Active
a! a<CR><LF>
Send Identification aI!
allccccccccmmmmmmvvvxxx...xx
<CR><LF>
Start Verification aV! atttn <CR><LF>
Address Query ?! a<CR><LF>
Change Address aAb! b<CR><LF>
Start Measurement
aM!
aM1! ... aM9!
atttn<CR><LF>
Start Measurement
and Request CRC
aMC!
aMC1! ... aMC9!
atttn <CR><LF>
Start Concurrent
Measurement
aC!
aC1! ... aC9!
atttnn<CR><LF>
Start Concurrent
Measurement and
Request CRC
aCC!
aCC1! ... aCC9!
atttnn<CR><LF>
Send Data aD0! ... aD9!
a<values><CR><LF>
or
a<values><CRC><CR><LF>
Continuous
Measurement
aR0! ... aR9! a<values><CR><LF>
Continuous
Measurement and
Request CRC
aRC0! ... aRC9! a<values><CRC><CR><LF>
Extended
Commands
aXNNN! a<values><CR><LF>
1 Information on each of these commands is given in following sections.