Danfoss Fc Control Profile - Danfoss VLT FC 100 LonWorks Manual

6 How to control the Frequency Converter

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
00 Reference value
01 Reference value
02 DC brake
03 Coasting
04 Quick stop
05 Hold output freq.
06 Ramp stop
07 No function
6
08 No function
09 Ramp 1
10 Data invalid
11 No function
12 No function
13 Parameter set-up
14 Parameter set-up
15 No function
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
with the following table:
Programmed ref. value
1
2
3
4
NB!
In par.8-56
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
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.
42
)
Bit value=1
External selection lsb
External selection msb
Ramp
No coasting
Ramp
Use ramp
Start
Reset
Jog
Ramp 2
Data valid
Relay 01 active
Relay 04 active
Selection lsb
Selection msb
Reverse
Preset Reference
in accordance
Bit
Parameter Bit 01
00
3-10 [0] 0 0
3-10 [1] 0 1
3-10 [2] 1 0
3-10 [3] 1 1
Preset Reference Select
, a selection is
DC Brake Current
and par. 2-02
MG.11.E2.02 - VLT
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
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:
•
DC
•
•
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VLT® FC 100 LonWorks
Coasting Select , a selection is made to de-
.
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.