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A.4.1 Measurement Data Registers
Table 26 Modbus Measurement Data Registers (Read-Only)
Register
Address
Number
(Hexadecimal)
(Decimal)
1
0000
hex
7
0006
hex
11
000A
hex
21
0014
hex
257
0100
hex
260
0103
hex
262
0105
hex
267
010A
hex
Accessing unavailable (temporarily missing) measurement data does not generate an
exception. "Unavailable" value (a quiet NaN for floating point data or 8000
is returned instead.
A.4.2 Status Registers
Table 27 Modbus Status Registers (Read-Only)
Register
Address
Number
(Hexadecimal)
(Decimal)
513
0200
hex
514
0201
hex
Register Description
Relative humidity (RH)
Dew/frost point temperature
(T
)
d/f
Dew/frost point temperature at
1 atm (T
)
d/fa
Water concentration (ppm)
Relative humidity (RH*100)
Dew/frost point temperature
(T
*100)
d/f
Dew/frost point temperature at
1 atm (T
*100)
d/fa
Water concentration (ppm)
Register Description
Error status
Online status
Appendix A – Modbus Reference
Data
Format
32-bit float
32-bit float
32-bit float
32-bit float
16-bit
signed
integer
16-bit
signed
integer
16-bit
signed
integer
16-bit
signed
integer
hex
Data
Notes
Format
16-bit
1 = No errors
integer
16-bit
1 = Data available
integer
0 = Outputs frozen due
to autocal or purge
Unit
%RH
°C
°C
ppm
%RH
°C
°C
ppm
for integer data)
77
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