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7.1.1 On-board Sensor Registers
On-board Sensor Information
Register
Bit
R/W
Number
Temperature Sensor
40011
15:0
R
Temperature Sensor
Equation
Temp = (ModbusReg[40011] * 0.0026812) – 46.5
Humidity Sensor
40012
15:0
R
Humidity Sensor
Equation
Humidity = (ModbusReg[40012] * 0.0019073) – 6
Light Sensor
40013
15:0
R
Light Sensor [1] (Ch1)
40014
15:0
R
Light Sensor [2] (Ch2)
Equations
Ratio = Ch2/Ch1
If 0 ≤ Ratio ≤ 0.52:
Luminance =
(0.0315*Ch1)-(0.0539*Ch1*((Ch2/Ch1)^1.4))
If 0.52 ≤ Ratio ≤ 0.65:
Luminance = (0.0229*Ch1)-(0.0291*Ch2)
If 0.65 ≤ Ratio ≤ 0.80
Luminance = (0.0157*Ch1)-(0.0180* Ch2)
If 0.80 ≤ Ratio ≤ 1.30
Luminance = (0.00338*Ch1)-(0.00260* Ch2)
If Ratio ≥ 1.30
Luminance = 0
Rotation Sensor (Turns Counter and Speed)
40015
15:0
R
40016
15:0
R
40017
15:0
R
40018
15:0
R
40019
15:0
R
40020
15:0
R
40021
15:0
R
40022
15:0
R
15:8
7
6
R
5
40023
4
3
2
R
1
R
0
R
3-Axis Accelerometer (Shock and Vibration Sensor)
40024
15:0
R
40025
15:0
R
40026
15:0
R
40810-
15:0
R
40909
Focal Technologies Corporation
A Moog Inc. Company
RPM[1] (bits 15:0)
RPM [2] (bits 31:16)
Total Rotations [1]
Total Rotations [2]
Clockwise Rotations [1]
Clockwise Rotations [2]
Counter Clockwise Rotations [1]
Counter Clockwise Rotations [2]
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
Counter Clockwise Rotation
Clockwise Rotation
No Rotation
Acceleration X
Acceleration Y
Acceleration Z
Shock Event X,Y,Z Data 0-31
Model 923 Data Logger – User Manual
Description
Example: Temp = 27.94 degC
Temperature = (27764 * 0.0026812) – 46.5
= 27.94
Example: Humidity = 41.90%
Humidity = (25112 * 0.0019073) – 6
= 41.90
Example: Lum = 46.35 lux
Ch1 = 1748
Ch2 = 319
Ratio = 0.182494283
Luminance
= (0.0315 * 1748)–(0.0539 * 1748 * (Ratio^1.4))
= 46.35
Equations:
Formatted Data = Raw Data
Big endian.
Example:
The Modbus 32-bit value is already formatted and
no further conversion is required.
Reserved
1=CCR detected. 0 = CCR not detected
1=CR detected. 0 = CR not detected
1=No Rotation detected. 0 = Rotation detected
Document No: 923-0603-01, Rev. 2
Page 7-4
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