Danfoss Fc Control Profile - Danfoss VLT Midi Drive FC 280 Programming Manual

Control

4.5 Danfoss FC Control Profile

4.5.1 Control Word According to FC Profile
(CTW)
To select Danfoss FC protocol in the control word, set
parameter 8-10 Control Word Profile to [0] Frequency
converter profile. Use the control word to send commands
from a master (PLC or PC) to a slave (frequency converter).
Bit Bit value = 0
00 Reference value
01 Reference value
02 DC brake
03 Coasting
04 Quick stop
05 Hold output frequency
06 Ramp stop
07 No function
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
Table 4.8 Bit Values for FC Control Word
Explanation of the control bits
Bits 00/01 reference value
Use bits 00 and 01 to select between the 4 reference
values, which are pre-programmed in parameter 3-10 Preset
Reference according to Table 4.9.
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.
MG07F102
Programming Guide
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
No function
Selection lsb
Selection msb
Reverse
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Bit 01 Bit 00 Programmed
reference value
0 0 1
0 1 2
1 0 3
1 1 4
Table 4.9 Programmed Reference Values for Bits
Bit 02, DC brake
Bit 02 = 0 leads to DC braking 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 immediately to
coast the motor to a standstill.
Bit 03 = 1 enables the frequency converter to start the
motor if the other starting conditions have been 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 quick stops the frequency converter and ramps
the motor speed down to stop via parameter 3-81 Quick
Stop Ramp Time.
Bit 04 = 1 makes the frequency converter ramp the motor
speed down to stop via parameter 3-42 Ramp 1 Ramp
Down Time or parameter 3-52 Ramp 2 Ramp Down Time.
Bit 05, hold output frequency
Bit 05 = 0 freezes the present output frequency (in Hz).
The frozen output frequency can only be changed with the
digital inputs (parameter 5-10 Terminal 18 Digital Input to
parameter 5-15 Terminal 33 Digital Input) programmed to
[21] Speed up and [22] Speed down.
Bit 05 = 1 uses ramp.
Parameter
[0]
Parameter 3-10 Preset
Reference
[1]
Parameter 3-10 Preset
Reference
4
[2]
Parameter 3-10 Preset
Reference
[3]
Parameter 3-10 Preset
Reference
19
4