Campbell Scientific CR23X Micrologger - Manual (Page 157)

SECTION 9. INPUT/OUTPUT INSTRUCTIONS
9-23
execution of the instruction, the CR23X will
again issue the ‘C’ command.
The results of an M, C, M1-M9, or V command
sequence is numerical data, stored in input
location(s). The response to the I command is
text information, which is written directly to Final
Storage regardless of the Output Flag's state.
The
7 mode of the CR23X cannot be
used to view text data.
†In addition to the Standard SDI-12 commands,
the CR23X can issue ‘Extended’ SDI-12
commands. Instruction 68, Extended
Parameters 4 Digit, is used to supply the
characters and values to be transmitted.
Multiple Instructions 68 can be used
sequentially to extend the command string. The
Command parameter 2 in Instruction 105 must
be 0, not 0--. Parameter 4 in Instruction 105
should refer to the first Input Location, if any, to
be sent as part of the command string. The
parameters placed in P68 are the decimal
ASCII equivalent of literal characters to be sent,
or ‘128’ if the value in an input location is to be
sent. Enter a parameter of zero to end the
string. The address prefix and ‘!’ suffix are
automatically sent in addition to the information
listed in Instruction(s) 68. The CR23X keeps no
data from the sensor response.
Example: To send the command 1A0+2.3456-
87.654! where 1 is the SDI-12 sensor address,
+2.3456 is the value in Input Location 5 and -
87.654 is the value in Input Location 6, use the
following instructions:
01: SDI-12 Recorder (P105)
1:
1 SDI-12 Address
2: 0 Start Measurement (aM0!)
3: 5 Port
4: 5 Loc [ SendVal_1 ]
5: 1 Mult
6: 0 Offset
02: Extended Parameters 4 Digit (P68)
1:
65 Option ;ASCII character A
2: 48 Option ;ASCII character 0
3: 128 Option ;Send first value
4: 128 Option ;Send second value
5: 0 Option ;End of command string
6: 0 Option
7: 0 Option
8: 0 Option