text: <s>[INST] 1398-PDM-75 + F-6100 motor bad problem at aux. circuits reset (rare but happening) Summary: 1398-PDM-75 sometimes makes F-6100 motor running away at auxiliary circuits resetI've done many applications since 1998 with 1398-PDM-75 + F-6100 brushless motors. Never had big issues except in an application where, in the last year is starting to happen that sometimes with no evident reason, just after auxiliary circuits reset the brushless axis runs away for a while that it stops with no drive error and everything ready. No errors logged inside the Ultra drive. Everything appears normal. Sw is standard and I've done many. Even changing 1398-PDM-75 with another one generates same reasults. Same after have changed F-6100 motor. Changed contactor, filter, encoder cable with no results. Of course, all hardwar checks have benn done and re-done more times withous find any probs. Firmware used in 1398 is 3.23 as is in at least other 30 application I've developed during last 13/14 years with this exact product. It's a rare event but it continues to happen only on that particular mahcine. Any idea or suggestion is very well appreciated [/INST] nan \\n </s>