Table 7: Modbus register map
Function
Parameter
Description
Range/state
Addr
Data type
Read
only
PSIg
------
9530
Double/float
•
kg/cm
2
------
9540
Double/float
•
Bars
------
9550
Double/float
•
mmHg
------
9560
Double/float
•
Internal pressure
kPa
------
9610
Double/float
•
MPa
------
9612
Double/float
•
PSIa
------
9620
Double/float
•
PSIg
------
9630
Double/float
•
kg/cm
2
------
9640
Double/float
•
Bars
------
9650
Double/float
•
mmHg
------
9660
Double/float
•
H
2
O Concentration
PPM
------
9710
Double/float
•
Lbs MMSCF
------
9720
Double/float
•
mg/sm
3
------
9730
Double/float
•
g/sm
3
------
9750
Double/float
•
Vapor pressure
kPa
------
9800
Double/float
•
1
Address 0 is the system status register, and address 1000 is the latching version of the system status register. That is, both
registers will show the error bit if the error is currently present, but only the latching register will show it if the condition is no
longer present. Writing 0 to the latching register will clear the error code it contains.
2
The
trim sequence start/resume live output registers for the three outputs, (address 2100, 2200, 2300) accept certain
values through the write multiple register to trim the output current:
1. Write 0 to 2x00 to select the normal mA output (proportional to measurement).
2. Write 1 to 2x00 to reset the mA output trim to factory defaults.
3. Write 2 to 2x00 to output the “zero” current (~4.000 mA) and accept a calibration value written to 2x40.
4. Write 3 to 2x00 to output the “span”” current (~20.000 mA) and accept a calibration value written to 2x50.
NOTE:
Attempting to write to trim registers 2x40/2x50 without first writing to trim state register 2x00 will fail with modbus
exception 4.
At the end of calibration, write 0 to 2x00 to make
Aurora H2O
exit trim mode.
79
Summary of Contents for Panametrics Aurora H2O
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