Siemens SINUMERIK 828D Programming Manual page 460

Path traversing behavior
8.2 Feedrate response (FNORM, FLIN, FCUB, FPO)
FNORM
The feed address F defines the path feed as a constant value according to DIN 66025.
Please refer to Programming Manual "Fundamentals" for more detailed information on this
subject.
FLIN
The feed characteristic is approached linearly from the current feed value to the programmed
F value until the end of the block.
Example:
N30 F1400 FLIN X50
460
Programming Manual, 07/2010, 6FC5398-2BP40-0BA0
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