text: <s>[INST] PF40 Fault Masking Hi all, The Application is a Fire System in a Hotel where in the PowerFlex 40 is used to drive the Exhaust Fan, Now below is the scenario.During Power switch over from main supply to Genset the time elapsed may vary from 5 to 15 seconds, if the switch over is 15 or more there is no problem for the drive since it was totally off.But if the switch over is within the time when the drive Display a Under Voltage Fault and the Power resume, the fault will remain and the drive cannot run. Then this will be the problem, since this is now an emergency situation.Is there any feature of the Power Flex 40 which we can mask this particular Fault. Or Any recommendation pleased help. [/INST] This is a known behavior, and you may proceed either: 1. Manually Reset with the stop button on the drive2. Reset via a Digital Input / comm card3. Remove the power long enough to let the drive going completely off.4. Automatically clear the fault through the AutoRestart parameter ... you will need to setup parameter A092 (Auto Rstrt Tries) to a value other than 0 and parameter A093 (Auto Rstrt Delay) to 0. This will attempt to reset any resettable fault immediately. See User Manual - page 3-29 for further details... Hope this helps, - fuzzy logic \\n </s>