Lookup table (0x80n1:21 “lookup table length”)

Using the lookup table offers the option to perform a transformation of the input values within the terminal. In the task cycle the terminal uses interpolation points to return a corresponding predefined output value for each input value. This allows reconciliation of non-linearities in the signal sequence.

• The lookup table is enabled via index 0x80n0:0B "Enable lookup table"
• The total length of the interpolation points to be used is entered in index 0x80n1:21 "Lookup table length". A maximum of 20 X/Y value pairs can be entered, which corresponds to a maximum lookup table capacity of 40 values.
• The respective X and Y value pairs are to be entered in object 0x80n5 "IND Scaler Settings Ch.n". Note the following regarding the entries in the lookup table:
• The odd subindices (1, 3, 5, ...) refer to the corresponding X-values, i.e. the values measured by the sensor
• The even subindices (2, 4, 6, ...) refer to the corresponding Y-values, i.e. the values to be mapped in each case
• Each X-value must be accompanied by a corresponding Y-value. Within the interpolation points the signal is interpolated; above/below it is extrapolated with the last/first available slope.