Does the Powerflex 40 At Reference status bit fluctuate or is it a solid at a given speed reference once the ramp completes (assuming no mechanical binding...more on that in a minute)? I'm waffling on using the Active bit + Delay Timer as a permissive on conveyor to conveyor or the At Reference bit. If the At Bit stays high and remains high it would be better to use it as it would also potentially account for mechanical issues preventing the drive from reaching speed. Better than simply Active + Timer.