Danfoss Fc Control Profile; Control Word According To Fc Profile (Ctw) - Danfoss VLT PROFIBUS DP MCA 101 Programming Manual

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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.
MG37G202
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
Relay 04 active
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
21
4