Danfoss Fc Control Profile; Control Word According To Fc Profile (8-10 Control Profile = Fc Profile) - Danfoss VLT HVAC Drive FC 102 Design Manual

Installation and Set-up

7.11 Danfoss FC Control Profile

7.11.1 Control Word According to FC
Profile (8-10 Control Profile = FC
Profile)
Master-follower
CTW
Bit
no.:
15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 0
Illustration 7.16 Control WordFC 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 use ramp
frequency
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 7.33 Bit Definitions
Bits 00/01
Bits 00 and 01 are used to choose between the four
reference values, which are pre-programmed in 3-10 Preset
Reference according to Table 7.34:
Programmed ref. Parameter
value
1 3-10 Preset
Reference [0]
2 3-10 Preset
Reference [1]
3 3-10 Preset
Reference [2]
4 3-10 Preset
Reference [3]
Table 7.34 Explanation of the Control Bits
MG16C202
Design Guide
Speed ref.
Bit 01 Bit 00
0 0
0 1
1 0
1 1
Danfoss A/S © Rev. 05/2014 All rights reserved.
NOTICE
Make a selection in 8-56 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 2-01 DC Brake Current and 2-02 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 8-50 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 3-81 Quick Stop Ramp 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 (5-10 Terminal 18 Digital Input to
5-15 Terminal 33 Digital Input) programmed to Speed up
and Slow 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 (5-10 Terminal 18 Digital Input to
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 and makes the motor speed
ramp 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 met.
Make a selection in 8-53 Start Select to define how Bit 06
Ramp stop/start gates with the corresponding function on
a digital input.
Bit 07, Reset
Bit 07 = '0': No reset. Bit 07 = '1': Resets a trip. Reset is
activated on the signal's leading edge, when changing
from logic '0' to logic '1', for example.
Bit 08, Jog
Bit 08 = '1': The output frequency is determined by
3-19 Jog Speed [RPM].
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