Calibration
 | Use of the term "calibration The concept "calibration", which has historical roots at Beckhoff, is used here even if it has nothing to do with the deviation statements of a calibration certificate. Actually, this is a description of the vendor or customer calibration data/adjustment data used by the device during operation in order to maintain the assured measuring accuracy. |
User scaling, index 0x8020:01 / 0x8030:01
The user scaling is enabled via index 0x8020:01 / 0x8030:01. Parameterization takes place via the indices.
Vendor calibration, index 0x802F / 0x803F
The vendor calibration is enabled via index 0x8020:0B / 0x8030:0B. Parameterization takes place via the indices.
User calibration, index 0x8020:17 / 0x8030:17, 0x8020:18 / 0x8030:18
The user calibration is enabled via index 0x8020:0B / 0x8030:0B. Parameterization takes place via the indices.
Process data calculation
The terminal records measured values continuously and places the raw values of its A/D converter into the ADC raw value object 0x802E:01 / 0x803E:01. The calculation of the correction with the vendor calibration values takes place after each acquisition of the analog signal. User scaling then follows (optionally):
YH = (XADC - BK) x AK | Measured value after vendor calibration (corresponds to YA if index 0x8020:0A / 0x8030:0A inactive) |
Y = Y x A x 2 + B A H W -16 W | Measured value after the user scaling |
Key
Name | Name | Index |
|---|---|---|
XADC | Output value of the A/D converter | |
BK | Vendor calibration offset (can only be changed if the object "Producer codeword" 0xF008 is set) | |
AK | Vendor calibration gain (can only be changed if the object "Producer codeword" 0xF008 is set) | |
BW | User scaling offset (can be enabled via index 0x8020:0A / 0x8030:0A) | |
AW | User scaling gain (can be enabled via index 0x8020:0A / 0x8030:0A) | |
YA | Process data for controller | - |