Xylem H-4161 - Manual (Page 29)

H-4161
SDI-12 Command and Response Protocol 3-13
3.13 Extended Set Transparent Mode command
When the Module Mode = 1 (Initiate), the H-4161 actively initiates measurements and collects
the response from the sensor attached to the auxSDI port. During setup and testing it may be
useful for the user to access the sensor attached to the auxSDI port without changing the wiring
or connectors. When activated, the Transparent mode causes the H-4161 to stop making
measurements on the auxSDI port and to make a virtual connection between the primary and
auxSDI ports. While the Transparent Mode is active, all communication to/from the H-4161's
address is passed thru to the auxSDI port. The “aM!”, “aD0!” and other internal commands of
the H-4161 are disabled and the H-4161 is essentially replaced by the sensor attached to the
auxSDI port.. The Transparent Mode is automatically deactivated when the H-4161 detects an
access to any sensor address other than its own. Note: the sensor address character of each
command is forced to “0" by the H-4161 before being forwarded to the auxSDI port.
Example of the H-4161 Extended Set Transparent Mode command:
Command Response Description
"aXSTM!" "aTransparent mode ON" Transparent mode is active