Xylem H-340SDI - Manual (Page 24)

2-10 SDI-12 Command and Response Protocol
H-340SDI
Example of a H340SDI extended "Write Slope" command:
Command Response Tim Values Description
------------- --------------------- ------- -------- -------------------------------
"aXWS1.234!" "a0011" 1 sec 1 Set slope to 1.234
Subsequent Command Response
--------------------------- ------------------------------------
"aD0" a+123.4
This command takes 001 seconds to complete and places 1 value in the data buffer. Use the “aD0"
command to collect and view the data.
2.12 Extend “Read Offset” Command
The H-340SDI maintains an offset value in RAM which is automatically added to the Total
Accumulation value. The offset value can be used to match the H340's Total Accumulation to the
current water year rainfall. This command allows the user to read the current offset value. The
offset is automatically set to zero at power-up or with the “aXRA” command.
Command Response Description
------------- ------------------------- -----------------------------
"aXR0!" "a0011"
Read Offset
Where:
a is the sensor address ("0-9", "A-Z", "a-z", "*", "?").
XRO are upper case characters
This command takes 001 seconds to complete and places 1 value in the data buffer. Use the “aD0"
command to collect and view the data.