text: <s>[INST] power flex 525 Summary: skip frequency I set parameter a449 to 30hz and a449 to 3hz, and yet my drive does not skip but accelerates right through my skip frequency. I tried a450 and a452 but no difference, ideas? [/INST] In your post, your first A449 you actually mean A448, correct? Skip frequency means the drive will not run at that frequency. If you've set A448 to be 30 hz, A449 to be 3 hz, then the drive will not run in the window between 27 hz and 33 hz. If you were to try to set the run frequency to 30, the drive would go to 26 or 34 hz. Look at page 120 of the user's manual: http://literature.rockwellautomation.com/idc/groups/literature/documents/um/520-um001_-en-e.pdf From your initial post, the drive is doing exactly what you are telling it to do: don't operate at 30hz. What are you trying to achieve? \\n </s>