VLT
®
AutomationDrive EtherNet/IP
MG.90.Jx.02 ver. 5
th
September 2007 – VLT is a registered Danfoss trademark 24
Danfoss FC Control Profile
Control Word according to FC Profile.
Instances 100, 101, 103/150, 151, 153
(Par. 8-10 = FC profile)
Master → slave
CTW Speed ref.
Bit
no.:
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Explanation of the Control Bits
Bits 00/01
Bits 00 and 01 are used to choose between the
four reference values, which are pre-
programmed in par. 3-10 Preset reference
according to the following table:
Programmed
ref. value
Parameter Bit
01
Bit
00
1 3-10 [0] 0 0
2 3-10 [1] 0 1
3 3-10 [2] 1 0
4 3-10 [3] 1 1
N.B.:
In par. 8-56 Preset reference select a
selection is made to define how Bit 00/01
gates with the corresponding function on the
digital inputs.
Bit 02, DC brake
:
Bit 02 = ‘0’ leads to DC braking and stop.
Braking current and duration are set in par.
2-01 DC Brake current and 2-02 DC Braking
time.
Bit 02 = ‘1’ leads to ramping.
Bit 03, Coasting
:
Bit 03 = ‘0’ causes the frequency converter to
immediately "let go" of the motor (the output
transistors are "shut off"), so that it coasts to a
standstill.
Bit 03 = ‘1’ enables the frequency converter to
start the motor if the other starting conditions
have been fulfilled.
N.B.:
In par. 8-50 Coasting select a selection is
made to define how Bit 03 gates with the
corresponding function on a digital input.
Bit 04, Quick stop
:
Bit 04 = ‘0’ causes a stop, in which the motor
speed is ramped down to stop via par.3-81
Quick stop ramp time.
Bit 05, Hold output frequency
:
Bit 05 = ‘0’ causes the present output
frequency (in Hz) to freeze. The frozen output
frequency can then be changed only by means
of the digital inputs (par. 5-10 to 5-15)
programmed to Speed up and Speed down.
N.B.:
If Freeze output is active, the frequency
converter can only be stopped by the
following:
• Bit 03 Coasting stop
• Bit 02 DC braking
• Digital input (par. 5-10 to 5-15) programmed
to DC braking, Coasting stop or Reset and
coasting stop.
Bit 06, Ramp stop/start
:
Bit 06 = ‘0’ causes a stop, in which the motor
speed is ramped down to stop via the selected
ramp down parameter.
Bit 06 = ‘1’ permits the frequency converter to
start the motor, if the other starting conditions
have been fulfilled.
N.B.:
In par. 8-53 Start select a selection is
made to define how Bit 06 Ramp
Bit
Bit value = 0 Bit value = 1
00 Reference value External selection LSB
01 Reference value External selection MSB
02 DC brake Ramp
03 Coasting No coasting
04 Quick stop Ramp
05
Hold output
frequency
Use ramp
06 Ramp stop Start
07 No function Reset
08 No function Jog
09 Ramp 1 Ramp 2
10 Data invalid Data valid
11 No function Relay 01 active
12 No function Relay 04 active
13 Parameter set-up Selection LSB
14 Parameter set-up Selection MSB
15 No function Reverse
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