Vendor calibration
Each analog input is calibrated in the factory. The results of the calibration are the coefficients of a correction function. The correction function is:
| YV = GV * ( XV - OV ) | YV : Measured value after the vendor calibration XV : Measured value before the vendor calibration GV : Gain of the vendor calibration OV : Offset of the vendor calibration |
The coefficients GV and OV cannot be changed by the user. If you wish to carry out a calibration yourself, use the user calibration.
You will find the coefficients for the different measuring ranges in the following CoE objects:
Connection | CoE object (read only) | |
|---|---|---|
X01 | 810Fhex | AI Vendor data Ch.1 |
X02 | 811Fhex | AI Vendor Data Ch.2 |
X05 | 812Fhex | AI Vendor data Ch.3 |
X06 | 813Fhex | AI Vendor data Ch.4 |
Disabling the vendor calibration
Notice | |
Measuring error with disabled vendor calibration The measuring error specified in the technical data is no longer guaranteed if you disable the vendor calibration. |
If you use the user calibration, it may be a good idea to disable the vendor calibration.
Set the following CoE parameters to FALSE to disable the vendor calibration for the respective input.
Connection | CoE object | Parameter | ||
|---|---|---|---|---|
X01 | 8100hex | AI Settings Ch.1 | 0Bhex | Enable vendor calibration |
X02 | 8110hex | AI Settings Ch.2 | 0Bhex | Enable vendor calibration |
X05 | 8120hex | AI Settings Ch.3 | 0Bhex | Enable vendor calibration |
X06 | 8130hex | AI Settings Ch.4 | 0Bhex | Enable vendor calibration |