Danfoss VLT FCD 311 Design Manual

Also see for VLT FCD 303: Operating instructions

Contents

Danfoss VLT FCD 311 Design Manual Manual pdf 100 page image

VLT® FCD Series Control Word according toFC protocolTo select FC protocol in the control word, parameter512 Telegram Profile must be set to FC protocol [1].The control word is used to send commands from amaster (e.g. a PC) to a slave (frequency converter).Bit Bit = 0 Bit =100 Preset ref. lsb01 Preset ref. msb02 DC braking03 Coasting stop04 Quick stop05 Freeze outp. freq.06 Ramp stop Start07 Reset08 Jog09 Ramp 1 Ramp 210 Data not valid Data valid11 No function12 No function13 Select Setup, lsb14 Select Setup, msb15 ReversingBit 00/01:Bit 00/01 is used to select between the two pre-programmed references (parameters 215-218 Presetreference) according to the following table:Preset ref. Parameter Bit 01 Bit 001 215 0 02 216 0 13 217 1 04 218 1 1NB!:In parameter 508 Selection of preset refer-ence a selection is made to define how Bit 00/01 gates with the corresponding function on the digi-tal inputs.Bit 02, DC brake:Bit 02 = ’0’ causes DC braking and stop. Brake volt-age and duration are preset in parameters 132 DCbrake voltage and parameter 126 DC braking time.Note: In parameter 504 DC brake a selection ismade to define how Bit 02 gates with the corre-sponding function on a digital input.Bit 03, Coasting stop:Bit 03 = ’0’ causes the frequency converter to imme-diately "let go" of the motor (the output transistorsare "shut off"), so that it coasts to a standstill.Bit 03 = ’1’ causes the frequency converter to beable start the motor if the other starting conditionshave been fulfilled. Note: In parameter 502 Coastingstop a selection is made to define how Bit 03 gateswith the corresponding function on a digital input.Bit 04, Quick stop:Bit 04 = ’0’ causes a stop, in which the motor’sspeed is ramped down to stop via parameter 212Quick stop ramp-down time.Bit 05, Freeze output frequency:Bit 05 = ’0’ causes the present output frequency (inHz) to freeze. The frozen output frequency can nowonly be changed by means of the digital inputs pro-grammed to Speed up and Speed down.NB!:If Freeze output is active, the frequency con-verter cannot be stopped via Bit 06 Start orvia a digital input. The frequency converter can onlybe stopped by the following:• Bit 03 Coasting stop• Bit 02 DC braking• Digital input programmed to DC braking, Coastingstop or Reset and coasting stop.Bit 06, Ramp stop/start:Bit 06 = ’0’ causes a stop, in which the motor’sspeed is ramped down to stop via the selected rampdown parameter.Bit 06 = ’1’ causes the frequency converter to beable to start the motor, if the other starting condi-tions have been fulfilled. Note: In parameter 505Start a selection is made to define how Bit 06 Rampstop/start gates with the corresponding function on adigital input.Bit 07, Reset:Bit 07 = ’0’ does not cause a reset.Bit 07 = ’1’ causes the reset of a trip. Reset is acti-vated on the signal’s leading edge, i.e. whenchanging from logic ’0’ to logic ’1’.Bit 08, Jog:Bit 08 = ’1’ causes the output frequency to be deter-mined by parameter 213 Jog frequency.Bit 09, Selection of ramp 1/2:MG.04.A1.02 - VLT is a registered Danfoss trade mark100