0x2038 External scaled measurement

Feature that takes an analog input and transforms it to an output as defined by a 5th order polynomial.

Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Scaled measurement value 0x2038:1 REAL 32 1 readonly (default) Transmit PDO (Inputs)

Scaled value of the selected analog input after applying the selected 5th order polynomial.
Name Index:Sub Type Bit Size Options Unit Access PDO Mapping
Analog input 0x2038:2 USINT 8
Internal 0
Analog input 1 1
Analog input 2 2
Analog input 3 3
Analog input 4 4
readwrite

Select the scaled measurement source.
Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Resistance 0x2038:3 UDINT 32 0 Ω readwrite

This subindex is useful when the user wants to apply the polynomial to a resistance value (e.g. resistance-based temperature sensor). It allows to select the pull-up resistor connected to the selected analog input.

If the selected analog input doesn't have an internal pull-up resistor, this feature will assume that the user connected an external pull-up resistor of the specified value. Otherwise, the drive will use the internal pull-up resistor with the closest value to the one specified and will overwrite the subindex value with the exact value.

The user then connects the resistance they want to measure between the analog input and GND. This feature will measure the value of that resistance and input it to the polynomial.

If the user wants to apply the polynomial to the standard analog input value, a value of 0 should be selected for this subindex.

This subindex is set to 0 when a differential analog input is selected.
Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Constant a0 0x2038:4 REAL 32 readwrite

Constant a0 of the polynomial (Offset)
Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Constant a1 0x2038:5 REAL 32 readwrite

Constant a1 of the polynomial (1st order coefficient)
Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Constant a2 0x2038:6 REAL 32 readwrite

Constant a2 of the polynomial (2nd order coefficient)
Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Constant a3 0x2038:7 REAL 32 readwrite

Constant a3 of the polynomial (3rd order coefficient)
Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Constant a4 0x2038:8 REAL 32 readwrite

Constant a4 of the polynomial (4th order coefficient)
Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Constant a5 0x2038:9 REAL 32 readwrite

Constant a5 of the polynomial (5th order coefficient)
Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Cutoff frequency 0x2038:10 UINT 16 1 10000 500 Hz readwrite

Cutoff frequency (Hz) for the LP filter for external scaled analog measurements.
Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Upper error threshold 0x2038:11 REAL 32 1199570688 readwrite

Upper error threshold for the external scaled measurements. When the scaled measurement value exceeds this threshold, a fault is generated. It is also used to generate a warning when the scaled measurement value is within 5% of the error threshold. 

The default value corresponds to the equivalent int representation of the float value 65535.0
Name Index:Sub Type Bit Size Min Data Max Data Default Data Unit Access PDO Mapping
Lower error threshold 0x2038:12 REAL 32 readwrite

Lower error threshold for the external scaled measurements. When the scaled measurement value goes lower than this threshold, a fault is generated. It is also used to generate a warning when the scaled measurement value is within 5% of the error threshold.