The HVAC industry requires flexible functions such as manual/auto control modes or local/remote control modes for different application conditions. These control modes can be used as a treatment to far-end remote control disconnection or for technical engineers to adjust HVAC controls manually. The C2000 series AC motor drive provides designated parameters and special wiring for the user to switch between manual/auto controls easily. 1. Parameter setting Pr.00-20=2 Source of frequency command is analog signal Pr.03-00=1 frequency command setting is AVI Pr. 03-01=1 frequency command setting is ACI Pr. 02-01=16(MI1) Force setting source of frequency command to ACI 2. Setting description When MI1 is OFF, the source of frequency is AVI (0-10Vdc). When MI1 is ON, the source of frequency is ACI (4-20mA).