Siemens SINUMERIK 840D sl Programming Manual page 287

If polynomial interpolation is active and a denominator polynomial is programmed with zeros
within the interval [0,PL], this is rejected and an alarm is output. Denominator polynomials
have no effect on the motion of special axes.
Note
Tool radius compensation can be activated with G41, G42 in conjunction with polynomial
interpolation and can be applied in the same way as in linear or circular interpolation modes.
Job Planning
Programming Manual, 06/2009, 6FC5398-2BP20-0BA0
4.5 Polynomial interpolation (POLY, POLYPATH, PO, PL)
Special motion commands
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