5.4. Danfoss FC Control Profile
5.4.1. Control Word according to FC Profile
(Par. 8-10 = 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 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
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
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 = ’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 stand-
still.
Bit 03 = ’1’ enables the frequency converter to start the motor if the 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 = ’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
.
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
.
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.
NB!
In par. 8-53
Start Select
a selection is made to define
how Bit 06 Ramp stop/start gates with the correspond-
ing function on a digital input.
Bit 07, Reset:
Bit 07 = ’0’ does not cause a reset.
Bit 07 = ’1’ causes the reset of a trip. Reset is activated on the signal’s
leading edge, i.e. when changing from logic ’0’ to logic ’1’.
5. How to Control the FC 300
FC 300 Interbus Operating Instructions
26
MG.33.H3.02 - VLT is a registered Danfoss trademark
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