Operating instructions

6.2 Danfoss FC Control Profile
6.2.1 FC Control Profile
Control Word According to FC Profile
(Par. 8-10 set to
FC Profile )
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 freq. 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
6.2.2 Explanation of the Control Bits
Bits 00 and 01:
Bits 00 and 01 are used to choose between the four reference values,
which are pre-programmed in par. 3-10
Preset Reference in accordance
with 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
NB!
In par.8-56
Preset Reference Select , a selection is
made to define how Bit 00/01 gates with the corre-
sponding function on the digital inputs.
Bit 02, DC brake:
Bit 02 set to [0] leads to DC braking and stop of the motor. Braking cur-
rent and duration are set in par. 2-01
DC Brake Current and par. 2-02 DC
Braking Time
.
Bit 02 set to [1] leads to ramping.
Bit 03, Coasting:
Bit 03 set to [0] causes the frequency converter to immediately release
of the motor (the output transistors are "shut off"), so that it coasts to a
standstill.
Bit 03 set to [1] enables the frequency converter to start the motor if
other starting conditions have been fulfilled.
NB!
In par.8-50
Coasting Select , a selection is made to de-
fine how Bit 03 gates with the corresponding function
on a digital input.
Bit 04, Quick Stop:
Bit 04 set to [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 set to [0] causes the present output frequency (Hz) to freeze. The
frozen output frequency can then be changed only by means of the digital
inputs set by par. 5-10 to 5-15, programmed to [Speed up] or [Speed
down].
NB!
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.
6 How to control the Frequency Converter VLT® FC 100 LonWorks
42 MG.11.E2.02 - VLT
®
is a registered Danfoss trademark
6