In-Situ Aqua TROLL 400 Modbus and SDI-12 Reference Guide - Manual (Page 24)

Name Command Response
ISCO Compatibility
aXPR0! aIxIxIxIx
Each Ix is a character pair identifying the
parameter and units for each measurement. The
number of Ix pairs equals the number of data
values returned for the Start Measurement and
Start Concurrent commands. The following pairs
are supported:
A0 = Temperature, °C
A1 = Temperature, °F
B0 = Actual Conductivity, mS/cm
B1 = Actual Conductivity, uS/cm
C0 = Specific Conductivity, mS/cm
C1 = Specific Conductivity, uS/cm
c2 = Resistivity, ohm-cm
d0 = Pressure, psia
d2 = Pressure, psig
d3 = Pressure, mmHg
F0 = Dissolved Oxygen, mg/L
F1 = Dissolved Oxygen, percent saturation
G0 = pH
G1 = pH, mV
H0 = ORP, mV
I0 = Level, m
I1 = Level, ft
If not listed above, all other parameter and unit
combinations will return “??”.
ISCO Additional
aXPR1!…aXPR9! a
No values are returned after an additional ISCO
compatibility command.
Communication
Diagnostics
aXCD! a+A+C
A = contents of Modbus device address register
9200
C = contents of Modbus serial communication
configuration register 9201
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