LTI TruSense S300 Series Integration Manual 3nd Edition
Page 36
Copyright © [2016] Laser Technology, Inc. All Rights Reserved. Unauthorized duplication, in whole or in part, is strictly prohibited.
aD0!
(
aD!
)
a
<values><CR><LF>
-or-
a
<values><CRC><CR><LF>
where
:
a = sensor SDI-12 address
<values> = pn.d
where:
p = the polarity sign (
„+‟ or „–„) and measurement
separator character
n = numeric digits before the decimal point
„.‟ = the decimal point
d = the numeric digits after the decimal point
<CRC> = the 3 character encoded 16-bit CRC of
the response, appended if the data was
requested with the
“
aMCn!
” or “
aCCn!
”
commands
Send Data
– 1
st
Buffer of Measurement(s) or vendor-
specific data from the
“
aV!
” command
The maximum number of digits for a data value is 7.
The minimum number of digits for a data value is 1.
The maximum number of characters in a data value is 9
(polarity sign + 7 decimal point).
aD1!
–
aD6
The same as the
“
aD0!
” response.
Send Data
– Additional Buffers of Measurements
(for up to 32 measurements)
The same as th
e “
aD0!
” description.
aD7!
–
aD9
a
<CR><LF>
-or-
a
<CRC><CR><LF>
where
:
a = sensor SDI-12 address and nothing else
indicating that these measurements are not
supported
<CRC> = the 3 character encoded 16-bit CRC of the
response, appended if the data was requested
with th
e “
aMCn!
” or “
aCCn!
” commands
Send Data
– Additional Buffers (not supported)
aV!
atttn
<CR><LF>
where
:
a = sensor SDI-12 address
ttt = the specified time, in seconds, until the sensor
will have the data ready
n = the number of data items
Start Verification - Query for vendor-specific data
example: "
30006
"
where
:
3 = sensor SDI-12 address
000 = ready immediately (0 seconds)
6 items
Use the
“
aD0!
” command to retrieve the vendor data
example: "
8+5+100+22+2+2+4
"
where
:
8 = sensor SDI-12 address
5 = number of measurements to take
100 = 10.0 seconds between measurements
22 =
“
aXV22!
” (i.e. “
$WU,22
”)
2 =
“
$LS,2
” (not applicable for Liquid)
2 =
“
$OP,8
” (not applicable for Liquid)
4 =
“
$MM,4
” (Always 4 for Liquid)
LTI S300/S310 Supported SDI-12 Extended Commands.
Command
Response
Description
aXAn!
an
<CR><LF>
where
:
a = sensor SDI-12 address
n = Measurement Mode
In Liquid measurement
mode must be always
set to 4
Same as serial
command $MM,4
aXBn!
an
<CR><LF>
where
:
a = sensor SDI-12 address
n = first parameter of the $OS command
1= lowpass filter
2= median filter
See serial command
$OS for details
aXCn!
an
<CR><LF>
where
:
a = sensor SDI-12 address
n = auto-start enabled (1), disabled (0)
Enable/disable auto-start
n = 0 disables auto-start
n = non-zero enables auto-start
See serial command $MA
aXDn!
an
<CR><LF>
where
:
a = sensor SDI-12 address
n = second parameter of the $OS command
Controls measurement
output per second. Valid
values are 1 to 14
See serial command
$OS
