4.4 Danfoss FC control profile
4.4.1 Control Word according to FC Profile
(parameter 8-10 = FC profile)
Speed ref.
CTW
Master-follower
130BA274.11
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit
no.:
Illustration 4.5 Control Word
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
Table 4.8 Control Bits
Explanation of the control bits
Bits 00/01
Bits 00 and 01 are used to select between the 4 reference
values, which are pre-programmed in
parameter 3-10 Preset
Reference
according to
.
Set-up
Bit 14
Bit 13
1
0
0
2
0
1
3
1
0
4
1
1
Table 4.9 Set-up
NOTICE
In
parameter 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 brake and stop. Braking current and
duration are set in
parameter 2-01 DC Brake Current
and
parameter 2-02 DC Braking Time
.
Bit 02 = 1 leads to ramping.
Bit 03, Coasting:
Bit 03 = 0 causes the frequency converter to immediately
release 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 are fulfilled.
NOTICE
In
parameter 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
parameter 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 with the digital inputs (
parameter 5-10 Terminal 18
Digital Input
to
parameter 5-15 Terminal 33 Digital Input
)
programmed to speed up and speed down.
NOTICE
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 (
parameter 5-10 Terminal 18 Digital
Input
to
parameter 5-15 Terminal 33 Digital
Input
) 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 are fulfilled.
NOTICE
In
parameter 8-53 Start Select
a selection, is made to
define how bit 06 Ramp stop/start gates with the
corresponding function on a digital input.
Control
VLT
®
CANopen MCA 105
22
Danfoss A/S © 06/2015 All rights reserved.
MG92G102
4
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