YOKOGAWA DO71 Manual page 10

Optical dissolved oxygen, modbus communication
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Address
Item name
3115
Salinity
3145
Pressure Comp. Unit
3147
Volatile Pressure Comp. Value
3153
Persistent Pressure Comp. Value
3497
Interval Unit
3499
Interval rate
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MODBUS Communication – Hold Register DO
Data type Access Value / description
Float
R/W
Uint32
R
Float
R/W
Float
R/W
Uint32
R/W
Uint32
R/W
Salinity value used for salinity
compensation (unit is g/L)
D: 0
0x 0080 0000
hPa (mbar)
Remark:
1)
This is a fixed unit
D: hPa (mbar)
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)
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
0x 0000 0001
seconds
Remark:
1)
This is the time unit for the oxygen
measurement interval rate, fixed
set to seconds
D: seconds
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
TI 12J06J01-00EN-P
10

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