OTT SE 200, Operating Instructions Manual

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6 SDI-12 Commands and Answers
6.1 Standard commands
The following SDI-12 standard commands are implemented in the SE 200:
Command Answer Description
a! a<CR><LF>
Acknowledgment active
aI! allccccccccmmmmmm…
Send identification
…vvvxxxx<CR><LF>
SE 200 Answer = …OTTHYDRO0000820.03
aAb! b<CR><LF>
Change address
?! a<CR><LF>
Query address
aM! atttn<CR><LF>
Start measurement
aD0! a<values><CR><LF>
Send data
aC!
atttnn<CR><LF>
Start simultaneous measurement
M ore information on the SDI-12 standard commands can be found in the document SDI-12; A Serial-Digital Interface Stan-
dard for M icroprocessor-Based Sensors; Version 1.2 (see Internet pagewww.sdi-12.org).
6.2 Extended SDI-12 Commands
All extended SDI-12 commands begin with an O for OTT. With these commands, it is possible to configure the SE 200
through the transparent mode of a datalogger.
Command Answer Description
– Adjust/read units
aOU<value>! aOU<value><cr>
Adjust units
aOU! aOU<value><cr>
Read out unit
a
– Sensor address
<value>
– Unit
0
= m
1
= cm
2
= ft
– Set measured value to 0
aOZ! aOZOK<cr>
Set measured value to 0 at the current float pulley
position
a
– Sensor address
– Adjust/read rotational direction
aOR<value>! aR<value><cr>
Adjust rotational direction
aOR! aR<value><cr>
Read out rotational direction
a
– Sensor address
<value>
– Rotational direction
0
= to the right
1
= to the left
– Adjust/read float pulley circumference
aOC<value>! aC<value><cr>
Adjust float pulley circumference
aOC! aC<value><cr>
Read out float pulley circumference
a
– Sensor address
<value>
–
b.a
b
– Digit prior to the decimal point
b
– Digit after the decimal point
Number of spaces: 5 (4 decimal point)
Note the following settings for the units
m
→
bbb.a
Input in mm (001.0 … 999.9)
cm
→
bbb.a
Input in mm (001.0 … 999.9)
ft
→
b.aaa
Input in feet (0.001 … 9.999)
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