text: <s>[INST] PF700S - Fault 41 RideThru Timeout I have a 2Hp PF700S powered off of an NRU/RGU (so it is not rectifying AC to DC, it is supplied off of a DC bus). The motor is running about 127RPM, and is overhauled slightly so it runs ~ -12%FLT. There is some variability in the overhauling load. I have recently started seeing a fault 41, RideThru Timeout. This fault indicates that the drive has been in a bus loss ridethrough for more than 2 sec. Since I don't have AC supply to the drive and none of the other drives on the NRU/RGU are having faults, I assume that this is not truly the cause. Could I experience this fault if the drive runs at zero torque for some period of time? The motor does not have an encoder, and Par 485 = 0 (FOC). [/INST] Which firmware revision do You have on Your drive ? \\n </s>