7.11. Danfoss FC Control Profile7.11.1. Control Word According to FC Profile(Par. 8-10 = FC profile)Bit Bit value = 0 Bit value = 100 Reference value external selection lsb01 Reference value external selection msb02 DC brake Ramp03 Coasting No coasting04 Quick stop Ramp05 Hold output frequency use ramp06 Ramp stop Start07 No function Reset08 No function Jog09 Ramp 1 Ramp 210 Data invalid Data valid11 No function Relay 01 active12 No function Relay 02 active13 Parameter set-up selection lsb14 Parameter set-up selection msb15 No function ReverseExplanation of the Control BitsBits 00/01Bits 00 and 01 are used to choose between the four reference values, which are pre-programmedin par. 3-10Preset reference according to the following table:Programmed ref. value Par. Bit 01 Bit 001 3-10 [0] 0 02 3-10 [1] 0 13 3-10 [2] 1 04 3-10 [3] 1 1NB!Make a selection in par. 8-56Preset Reference Select to de-fine how Bit 00/01 gates withthe corresponding function onthe digital inputs.Bit 02, DC brake:Bit 02 = ’0’ leads to DC braking and stop. Set braking current and duration in par. 2-01DC BrakeCurrent and 2-02DC Braking Time . Bit 02 = ’1’ leads to ramping.7. RS-485 Installation and Set-up VLT® HVAC Drive Design Guide146 MG.11.B2.02 - VLT® is a registered Danfoss trademark7
