Specifications
7.11 Danfoss FC Control Profile
7.11.1 Control Word According to FC
Profile (O-10 Control Word Profile =
FC profile)
Speed ref.CTW
Master-slave
130BA274.10
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Bit
no.:
Illustration 7.16 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 02 active
13 Parameter set-up selection lsb
14 Parameter set-up selection msb
15 No function Reverse
Table 7.34 Bit Definitions
Bits 00/01:
Bits 00 and 01 are used to choose between the four
reference values, which are pre-programmed in C-05 Multi-
step Frequency 1 - 8 according to Table 7.35:
Programmed ref.
value
Parameter Bit 01 Bit 00
1
C-05 Multi-step
Frequency 1 - 8
[0]
00
2
C-05 Multi-step
Frequency 1 - 8
[1]
01
3
C-05 Multi-step
Frequency 1 - 8
[2]
10
4
C-05 Multi-step
Frequency 1 - 8
[3]
11
Table 7.35 Explanation of the Control Bits
NOTICE
Make a selection in O-56 Preset Reference Select 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 braking and stop. Set braking
current and duration in B-01 DC Brake Current and B-02 DC
Braking Time. Bit 02 = ’1’ leads to ramping.
Bit 03, Coasting:
Bit 03 = ’0’: The frequency converter immediately "lets go"
of the motor, (the output transistors are shut off) and it
coasts to a standstill. Bit 03 = ’1’: The frequency converter
starts the motor if the other starting conditions are met.
Make a selection in O-50 Coasting Select to define how Bit
03 gates with the corresponding function on a digital
input.
Bit 04, Quick stop:
Bit 04 = ’0’: Makes the motor speed ramp down to stop
(set in C-23 Quick Stop Decel Time).
Bit 05, Hold output frequency:
Bit 05 = ’0’: The present output frequency (in Hz) freezes.
Change the frozen output frequency only by means of the
digital inputs (E-01 Terminal 18 Digital Input to
E-06 Terminal 33 Digital Input) programmed to Speed up
and Slow down.
Installation and Set-up VLT® HVAC Drive FC 102 Design Guide
178 MG16C102 - Rev. 2013-08-20
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