FC 300 Design GuideHow to Program" Control Word According to FC Profile (CTW)To select the FC protocol in the control word, setpar. 8-10 control word profile to FC protocol [0].The control sends commands from a master (PLCor PC) to a slave (adj. frequency drive).Master => slave1 2 3 ..... 10CTW MRV PCD ..... PCDPCD read/writeExplanation of the Control BitsBit 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 Freeze output use ramp06 Ramp stop Start07 No function Reset08 No function Jog09 Ramp 1 Ramp 210 Data not valid Data valid11 Relay 01 open Relay 01 active12 Relay 02 open (FC 302 only) Relay 02 active (FC 302 only)13 Parameter set-up selection lsb14 Parameter set-up selection msb15 No function ReverseBits 00/01Use bits 00 and 01 to choose between the fourreference values, which are pre-programmed in par.3-10 Preset Reference according to the shown table:NOTEMake a selection in par. 8-56 PresetReference Select to define how bit00/01 gates with the correspondingfunction on the digital inputs.Programmed ref.valuePar. Bit 01 Bit 001 3-10 [0] 0 02 3-10 [1] 0 13 3-10 [2] 1 04 3-10 [3] 1 1Bit 02, DC brake:Bit 02 = í0í: DC braking and stop. Set braking current and duration in par. 2-01 DC BrakeCurrent and 2-02 DC Braking Time. Bit 02 = í1í leads to ramping.* default setting ( ) display text [ ] value for use in communication via serial communication port277MG.33.B6.22 - VLT is a registered Danfoss trademark
