User scaling

From Firmware 05

Notice

Measured value resolution is reduced to 1 mg/LSB

If user scale is enabled, the measured values are output with a resolution of 1 mg/LSB regardless of the set measured value resolution.

If you require a measured value resolution other than 1 mg/LSB, you can implement user scale in your PLC.

The transfer function of the user scale for the analog inputs is as follows:

Y_S = G_S* ( X_S – O_S )

Y_S : Measured value after the user scaling

X_S : Measured value before the user scaling

G_S : Gain

O_S : Offset

Enable user scale

The user scale is disabled in the factory. It can be enabled individually for each channel. To do this, set the respective CoE parameter “Enable user scale” to TRUE:

Acceleration axis	"Enable user scale"
X	8000:01
Y	8010:01
Z	8020:01

Setting the scaling coefficients

Set the scaling coefficients via the CoE parameters "User scale offset" and "User scale gain":

Acceleration axis	"User scale offset"	"User scale gain" ¹⁾
X	8000:11	8000:12
Y	8010:11	8010:12
Z	8020:11	8020:12

¹⁾ The parameter "User scale Gain" is scaled with the factor 2¹⁶ (65536_dec).
The default value 65535_dec of the parameter therefore corresponds to Gain = 1.