Interpretation of the measured values
The measured acceleration values can be displayed in two different ways. See chapter Display of the measured values.
The interpretation of the measured values depends on the display type.
Interpretation of the raw values
The raw values are arranged in the most significant 10 bits of the variable "Value", which is 16 bits long:
Bit: | 15 | 14 | 13 | 12 | 11 | 10 | 9 | 8 | 7 | 6 | 5 | 4 | 3 | 2 | 1 | 0 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Contents: | Raw value | 0 | 0 | 0 | 0 | 0 | 0 | |||||||||
Recommendation: in the PLC program use the function SHR() to shift a raw value to the least significant 10 bits: SHR(<measured value>,6). After shifting the raw value is easier to process.
The raw values can range between -510 and +510:
- -510 is the lowest value of the measuring range.
In the +/-2 g measuring range, the lowest value is -2 g. - +510 corresponds to the full scale value.
In the +/-2 g measuring range, the full scale value is +2 g.
Between -510 and +510 the raw values are linear. Use the following formula to convert a raw value to a physical quantity:
|
| a: Acceleration. Unit: g. MBE: full scale value n: raw value |
Interpretation of the physical values
The physical values have the unit mg.
1 mg = 0.001 x 9.81 m/s2