GHM Delta OHM HD50 Series, Operating Manual

Page: 28 / 54

HD50
- 28 -
V1.5
6 MODBUS
The device general information can be read through the function code
0x2B/0x0E
:
•
Manufacturer (Delta OHM)
•
Model
•
Firmware version
The complete list of MODBUS registers is shown below. According to the device model,
some of the listed registers could not be present if not significant for that particular
model (e.g., CO
2
measurement will not be available if it is not measured by the data
logger). If you try to read a register that is not present, the instrument returns the
fixed value 32767. In case of doubt on the registers actually available in a particular
model, use the function "
Download the list of MODBUS registers of the device
" includ-
ed in the
Settings
sections of HD35AP-S software (see software instructions).
The following conventions have been used in the tables:
o
Type: b = bit, B = 8 bits (Byte), W = 16 bits without sign (Word), SW = 16 bits
with sign
o
(x10) = decimal value expressed as an integer (e.g., if the content of the register
is 184, the value is to be intended as 18,4).
o
(x100) = centesimal value expressed as an integer (e.g., if the content of the reg-
ister is 500, the value is to be intended as 5,00).
The commands for requesting units of measurement return an index according to the
correspondence indicated in the table below:
Indexes of the units of measurement
Index
Unit of
meas.
Index
Unit of
meas.
Index
Unit of
meas.
Index
Unit of
meas.
Index
Unit of
meas.
0 °C 14 inchH
2
O 28 V 42 inch/h 56 µmol/(m
2
s)
1 °F 15 kgf/cm
2
29 mV 43 counts/h 57 mm/day
2 %UR 16 PSI 30 mA 44 mW/m
2
58 kV
3 g/m
3
17 m/s 31 ppm 45 m 59 A
4 g/kg 18 km/h 32 Hz 46 s 60 kA
5 mbar 19 ft/s 33 % 47 µW/lumen 61 cm/s
6 bar 20 mph 34 degrees 48 dB 62 klux
7 Pa 21 knot 35 lux 49 dBA 63 m
3
8 hPa 22 W/m
2
36 m
2
/s 50 kWh 64 g/m
2
s
9 kPa 23 µW/cm 2 37 g (*) 51 l/s 65 µg/m 3
10 atm 24 Wh/m
2
38 mm 52 l/min 66 µm
11 mmHg 25 kWh/m
2
39 inch 53 gallon/min
12 mmH
2
O 26 J/m
2
40 counts 54 m
3
/min
13 inchHg 27 µJ/cm
2
41 mm/h 55 m
3
/h 255 Not
defined
(*)
Gravity acceleration
Discrete Inputs
- Read-only parameters
Address Type Discrete Input description
7 b If 1, at least a quantity is in alarm.