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MODBUS Communication
– Hold Register DO
10
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Address Item name Data type Access Value / description
3115 Salinity Float R/W
Salinity value used for salinity
compensation (unit is g/L)
D: 0
3145 Pressure Comp. Unit Uint32 R
0x 0080 0000 hPa (mbar)
Remark:
1) This is a fixed unit
D: hPa (mbar)
3147 Volatile Pressure Comp. Value Float R/W
Pressure value in hPa (mbar) used for
oxygen calculation
Remark:
1) If included in a multi register write,
no change will take place
2) Value is not written into Flash
memory
D: By default, this is the Persistent
Pressure Comp. value (register
HR3153)
3153 Persistent Pressure Comp. Value Float R/W
Default setting for compensation
pressure value in hPa (mbar)
Remark:
1) Do not use this register frequently
due to limited number of write
cycles into Flash memory. For
frequent pressure changes please
use register HR3147
2) Value is stored into Flash memory
and restored at startup
D: Set by manual input
3497 Interval Unit Uint32 R/W
0x 0000 0001 seconds
Remark:
1) This is the time unit for the oxygen
measurement interval rate, fixed
set to seconds
D: seconds
3499 Interval rate Uint32 R/W
Oxygen measurement interval rate in
time unit as set in register HR3497
Remark:
1) Setting the interval rate to 0
deactivates the continuous
measurement
(see register HR9000)
D: 1 L: 0 H: 300