A transformation function can be applied to measured values. The function is applied for each received measured value.
List of applicable functions :
tfid | Range 0 / Deadband | math function |
normal | [-bm…bm] | y=a*x+b |
square_root | [-bm…bm] | y=a*sqrt(x)+b |
quadratic | [-bm…bm] | y=sqrt(a*x+b) |
transparent | [-bm…bm] | y=x |
The value a=0 is always replaced by a=1.
The following attributes are read from the Exchanged data configuration:
R1 : transformation function is performed only for measured values configured in the Exchanged data configuration.
R2 : transformation function is performed only if a valid tfid, array of parameters and dead band are configured.
R3 : (quality check) transformation function is performed only if PIVOTTM.GTIM.MvTyp.q.Validity is different of "good" or if one of the attributes of PIVOTTM.MvTyp.q.DetailQuality is set to "true" the module sets PIVOTTM.GTIM.MvTyp. q.Validity to "invalid" and the output PIVOTTM.GTIM.MvTyp.mag.f to 0 (deletion of the PIVOTTM.GTIM.MvTyp.mag.i if it exists)
R4 : (calculation error check) If the square root parameter has a negative value, the output result is set to 0 bad quality and the "inconsistent" bit is set to 1.
R5: (calculation error check) If the result of the calculation does not correspond to the internal format of the variable (outside the functional type float32...), the output result is set to 0 bad quality and value the overflow to active. The calculation is therefore stored in a double format before being converted to float32.
This filter plugin expects readings to be a pivot model measured values datapoints.
The module uses the identification (Attribute PIVOTTM.GTIM.Identifier) of the data to determine if the measured value is part of the information to be processed.
The data read from the pivots format are :
The module performs the configured transformation function to the measured value before forwarding it to other services.
The data in the generated pivot format is :