text: <s>[INST] Powerflex 753, Hi all, 1.is there any parameters to adjust in powerflex 753 to stop Fan for spinning backward before starting forward? 2. could spinning backward hurts powerflex 753? if it yes, how can fix this problem? Motor info: 50 HP, centrifugal Fan, 60 Hz, 460VAC AC drive info: 20F11ND077AA0NNNNN [/INST] Hi - Have you tried to set P308 [Direction Mode] to 2 Rev Disable? What it does is that negative speed reference values are rejected and a zero speed value is used in their place. Is that what you're looking for? \\n </s>