E+E Elektronik EE310 User Manual page 24

NOTICE
For obtaining the correct floating point values, both registers have to be read within the same reading
cycle. The measured value can change between two Modbus requests, exponent and mantissa may get
inconsistent then.
Communication settings (INT16)
Parameter
Write register: function code 0x06
4)
Modbus address
4)
Modbus protocol settings
Device information (INT16)
Parameter
Read register: function code 0x03 / 0x04
Serial number (as ASCII)
Firmware version
Sensor name
1) Register number (decimal) starts from 1.
2) Register address (hexadecimal) starts from 0.
3) Number of registers
4) For Modbus address and protocol settings see Application Note Modbus AN0103 (available at www.epluse.com/ee310).
Tab. 9 EE310 registers for device setup
For highest accuracy of RH related calculated quantities, the barometric pressure at the operating point can be
used for compensation. For this purpose, the "Air pressure" register is available which may be written via Modbus
command or with PCS10.
FLOAT32
Parameter
Write register: function code 0x10
Air pressure
1) Register number (decimal) starts from 1.
2) Register address (hexadecimal) starts from 0.
Tab. 10 EE310 air pressure register
1)
Register number [Dec]
1
2
1)
Register number [Dec]
1
9
10
1)
Register number [DEC]
5001
User Manual EE310
2)
Register address [Hex]
00
01
2)
Register address [Hex]
00
08
09
2)
Register address [HEX]
1388
Humidity and Temperature Sensor | 24
3)
Size
1
1
3)
Size
8
1
8
Unit
mbar