OTT PLS 500, Operating Instructions Manual

Page: 23 / 56

7.2 Standard commands
Command Response Description
a! a<CR><LF>
Acknowledgement active
a
– sensor address; factory setting:
0
aI!
allccccccccmmmmmmvvv …
… xxxxxxxxxxxxx<CR><LF>
Send identification
a – sensor address
ll – SDI-12 protocol version
cccccccc – manufacturer’s identification
(company name)
mmmmmm – sensor identification
vvv – sensor version (in this case firmware)
xxxxxxxxxxxxx – additional identification (in this case
serial number; max. 13 characters)
OTT PLS 500 response 014OTTHYDROPLS500100 …
… xxxxxxxxxx
aAb! b<CR><LF>
Change sensor address
a
– old sensor address
b
– new sensor address
?! a<CR><LF>
Query sensor address
a – sensor address
aV! atttn<CR><LF>
Perform system test
a
– sensor address
ttt
– time in seconds until the sensor provides the
result of the system test
response OTT PLS 500:
000
n
– number of measured values
response OTT PLS 500:
9
aD0!
a<value1><value2><value3> …
… <CR><LF>
Send data (after aV! )
a – sensor address
<value1> – relative humidity in the probe housing
measured value format: pbb [
% rH
]
<value2> – dew point in the probe housing
measured value format: pbb.ee [°C]
<value3> – current sensor orientation
measured value format: pbbb [°]
aD1! a<value4><value5><value6> …
… <CR><LF>
Send data (after aV! )
a – sensor address
<value4> – sensor orientation during installation
measured value format: pbbb [°]
<value5> – corrected temperature value of pressure sensor
measured value format: pbb.ee [°C]
<value6> – temperature of internal humidity sensor
measured value format: pbb.ee [°C]
aD2! a<value7><value8><value9>
…
…
<CR><LF>
Send data (after
aV!
)
a
– sensor address
<value7>
– corrected pressure value of pressure sensor
measured value format:
pbbbb.ee
[mbar]
<value8>
– standard deviation of corrected pressure value
of pressure sensor within the averaging time
1)
measured value format:
pbbbb.ee
[mbar]
<value9>
– device status
+0
➝
no error occured
+1
➝
system reset – status flag is set when
connecting the operating voltage/upon
unexpected reset; deletion after status
read out
(Continuation of device status see next page)
1)
determined from 2 … 238 single measurements of a measurement interval, (see command
aXXC!
)
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