Command Response Description
䊳 SDI-12-/RS-485 interface – setting/reading offset for level/depth measurement
aOAB<value>!
aOAB!
a0022<CR><LF>
and after 2 seconds
a<CR><LF>
a<value><CR><LF
Setting the offset value
Reading out the offset value
a – Sensor address
<value> – pbbbb.eee
p – sign (+,–)
b – numbers (before the decimal point)
e – numbers after the decimal point
a<CR><LF> – Service request
Input/output is without leading zeroes.
Value range: –9999.999 … +9999.999
Factory setting = +0.000
With this command you can add a linear offset
(positive/negative) to a level/depth measurement value.
After setting the offset value, the OTT PLS automatically starts
a measurement. After receiving the service request, check the
measured value with command aD0!. After an unsuccessful
entry, the pressure probe replies with a new service request.
Caution
This command overwrites any set reference value!
Example
Measured value = +10.040 m
Offset = –0.200 m
Output = +9.840 m
Note
If the unit is changed afterwards (aOSU<value>!), round-
ing errors of ±0.001 are possible.
䊳 SDI-12-/RS-485 interface – setting/reading reference value for level/depth measurement
aOAC<value>!
aOAC!
a0022<CR><LF>
and after 2 seconds
a<CR><LF>
a<value><CR><LF>
Setting the reference value
Reading out the reference value
a – Sensor address
<value> – pbbbb.eee
p – sign (+,–)
b – numbers (before the decimal point)
e – numbers after the decimal point
a<CR><LF> – Service request
Input/output is without leading zeroes.
Value range: –9999.999 … +9999.999
Factory setting = +0.000
With this command you can establish a reference to a level
zero, for example, by entering a reference value for
level/depth measurement. After setting the reference value,
the OTT PLS automatically starts a measurement. After
receiving the service request, check the measured value with
command aD0!. After an unsuccessful entry, the pressure
probe replies with a new service request.
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