Xylem XL Series H-522 - Plus - Manual (Page 118)

14-2 SDI-12 Operations
XL™ Series
PC Menu Screen: SDI-12 Transparent Options.
Generic SDI-12 Options (Esc to Return)
T - Test Address: 0
A - Acknowledge
I - Identify
V - Verify
M - Measure
D - Data Retrieval
S - Send Extended
E - Edit Extended: 0
F - Full Screen Transparent / Monitor Mode
L - Look For Sensors
Enter Option >
PC Interface View Built In Display Screen
T - Test Address: 0 SDI-12 Test Adrs [0]
This option sets the SDI-12 address that the XL™ will use to communicate with each SDI-12
sensors. This allows for the standard SDI-12 commands to be sent as single key press. This is not
to be confused with the option that sets the SDI-12 address of the XL™ when it is used as a
sensor.
PC Interface View Built In Display Screen
A - Acknowledge Send Ack Cmd?
This command sends the address followed by the “!” terminator. The normal response is the
sensor address followed by a Carriage Return and Line Feed. If the sensor is not connected or
does not respond, the XL™ will respond with, “Communication Timed Out.” Refer to the sensor
manufacturer for proper response to the Acknowledge Command.
Pressing the ‘A’ key from the PC menu or the ENTER key in the built in menu causes the SDI-
12 Acknowledge command “a!” to be sent to the sensor using the address defined above. The
sensor’s response is displayed on the screen. If there are any errors, a no response message is
displayed. A detailed description of the SDI-12 commands is given in Appendix B.