What care should be taken if frequency reference from preset speed function is desired but same time analog signal from potentiometer (VDC) is present on analog input (AI1) of ATV312 drive.
While assigning presets speed function, no need to change Fr1 [Ref.1 channel] configuration and it is
by default set to AI1 (Analog input AI1).
Preset speeds come in to an effect only along with RUN (FWD or REV) command. If RUN command is active only and no
logic input corresponding to preset speed is active then ATV312 will take frequency reference corresponding to VDC-analog
signal on AI1. SO, be ensure with wiring schematics that switching of RUN is activated only the time switching of preset speeds
logic inputs is activated or RUN command should be activated post to preset speeds logic inputs activation.