USER'S GUIDE____________________________________________________________________
188 _________________________________________________________________ M210704EN-F
NOTE
If your MODBUS master supports 32-bit floating point values, always
use them instead of 16-bit integer registers.
The use of 16-bit integer values is not recommended in critical
applications because you cannot distinguish true zero values from zero
values generated by measurement failures.
In addition to this, 2’s complement makes negative values look like large
positive values, which must be taken into account when utilizing the
16-bit register values.
When writing 16-bit values in configuration registers, they are always
processed as signed integers in the range of -32768…+32767. You shall
use the floating point registers to write values outside this 16-bit signed
integer range. Maximum writable value is 32767 also for configuration
registers that do not accept negative values.
Measurement Data (Read-Only)
Table 36
Measurement Data Registers
Name Float
Integer
Unit
RH 0001…0002
0257
(×0.01)
%
T 0003…0004
0258
(×0.01)
°C
T
d
0007…0008
0260
(×0.01)
°C
T
d/f
0009…0010
0261
(×0.01)
°C
T
d/f
(atm)
0011…0012
0262 (×0.01)
°C
T
d
(atm)
0013…0014
0263 (×0.01)
°C
a 0015…0016
0264
(×0.01)
g/m³
x 0017…0018
0265
(×0.01)
g/kg
T
w
0019…0020
0266
(×0.01)
°C
H
2
O 0021…0022
0267
(×1)
ppm
V
p
w
0023…0024
0268
(×0.1)
hPa
p
ws
0025…0026
0269
(×0.1)
hPa
h 0027…0028
0270
(×0.01)
kJ/kg
Δ
T 0031…0032
0272
(×0.01)
°C
a
NTP
0033…0034
0273
(×0.01)
g/m³
H
2
O 0065…0066
0289
(×1)
ppm
W
Available measurements depend on the instrument configuration. Values
may be unavailable also in case of device failure; Read status registers or
exception status outputs to check for failures.
NOTE
Only real-time data can be read from the instrument. Data that is
recorded in the transmitter’s memory (internal memory or data logger
module) cannot be read through MODBUS.
