11
User Manual EE680
Air Velocity and Temperature Sensor for Laminar Flow
5.3 Modbus Register Map
The measured data is saved as a 32 bit floating point values (data type FLOAT) and as 16 bit signed
integer values (data type INTEGER).
INTEGER 16 bit:
Parameter
Unit
Scale
4)
Register number
1)
[Dec]
Register address
2)
[HEX]
Read register: function code 0x03 / 0x04
Air velocity vn
3)
m/s
100
4023
0xFB6
ft/min
0.1
4024
0xFB7
Temperature T
°C
100
4002
0xFA1
°F
50
4003
0xFA2
FLOAT 32 bit:
Parameter name
Unit
Register number
1)
[Dec]
Register address
2)
[HEX]
Read register: function code 0x03 / 0x04
Air velocity vn
3)
m/s
1045
0x414
ft/min
1047
0x416
Temperature T
°C
1003
0x3EA
°F
1005
0x3EC
1) Register number starts from 1
2) Register address starts from 0
3)
Standardized air velocity vn at standard conditions (factory setup): Tn = 23 °C (73 °F), pn = 1 013.25 hPa (14.7 psi), settable via EE-PCS
4) Examples: For scale 100, the reading of 2550 means a value of 25.5. For scale 50, the reading of 2550 means a value of 51.
5.4 Sensor Configuration with the EE-PCS
5.4.1 Analogue Outputs
Menu Item
Configurable Items
Outputs
Selection between current and voltage output
Selection of scaling, measurand and error indication
Fig. 10
Configuration of analogue outputs
Both outputs are either voltage or current at the same time, a change in one output automatically
changes the other one. Measurand selction, unit selection and scaling of the measured value are done
here.
The probe can be configured to simulate an arbitrary reference value by checking one of the “Fixed
value” boxes and entering the required value.
The NAMUR error indication can be changed. It is enabled by factory default.
