Campbell Scientific VSP3 Vosponder Voice Radio Interface - Manual (Page 44)

Appendix A. SDI-12 Interface
A-2
A.3 Master Mode for SDI-12 Sensors
This appendix does not cover the operation of the Vosponder in master mode.
The master mode is best used when attaching the Vosponder directly to stand
alone SDI-12 sensors such as a water quality multi-probe, pressure transducer,
shaft encoder, or any sensor or SDI-12 device that does not have the ability to
issue SDI-12 commands.
A.4 SDI-12 Master Mode
The Vosponder must be converted over to master mode by using terminal
programming. At the main menu prompt “M:>” you must enter the edit sub
menu by pressing “E”. It will look like this:
13DACOMTECH VSP3_010_034A*EU1002 * ? for Help
M:>E
E:>?
(D)TMF Code
(S)DI-12 Adr
SDI-12 (M)ode
(T)x
(ESC)
E:>M
EM>?
(M)aster
(S)lave
(ESC)
EM>M
Then press “M” to edit the mode. You will see a prompt that now shows EM>.
Here you can enter either an “S” for slave or “M” for master. This will change
the modes accordingly. Remember you can back up to the main menu and
enter the (V)iew modes to verify that your Vosponder is in it’s correct mode.
RESETTING THE VOSPONDER WILL RETURN IT TO
SLAVE MODE!
If a user is going to interface the Vosponder directly to an SDI-12 sensor, a
secondary image known as the master image file will need to be created in
addition to the voice image file. The master image file will tell the Vosponder
how many data points to expect and the SDI-12 address of the slave device
(sensor). Detailed documentation of how to set up the master mode option is
not covered in this manual. This information will gladly be provided by
contacting Intermountain Environmental, Inc. at 435-755-0774 or by e-mailing
your request to [email protected]
NOTE