VLT® Serie 2800 and VLT® Serie 6000 Modbus RTU
Parameter
Handling
Output frequency= 2000 Hex 50% of the frequency
range, corresponding to 25 Hz.
å Control Word Bit Descriptions VLT 6000
The control word is used for transmitting commands
from a master (e.g. a PC) to a slave.
Bit Bit = 0 Bit =1
00 Preset ref. lsb
01 Preset ref. msb
02 DC braking
03 Coasting stop
04 Quick stop
05 Freeze output frequency
06 Ramp stop Start
07 Reset
08 Jog
09 No function No function
10 Data not valid Data valid
11 Activate relay 1
12 Activate relay 2
13 Choice of setup lsb
14 Choice of setup msb
15 Reversing
Bit 00/01:
Bits 00 and 01 are used for choosing between the four
pre-programmed references (parameters 211- 214
Preset reference) in accordance with the following table:
Preset ref. Parameter Bit 01 Bit 00
1 211 0 0
2 212 0 1
3 213 1 0
4 214 1 1
NOTE
Parameter 508 Choice of preset reference
is used to choose how bits 00/01 are
to be gated with the corresponding
functions of the digital inputs.
B
it 02, DC BRAKE:
Bit 02 = 0 leads to DC braking and stop. Set
braking current and duration in parameter 114 DC
braking current and in parameter 115 DC braking
time. Note: Parameter 504 DC brake is used
for selecting how bit 02 is to be gated with the
corresponding function of terminal 27.
B
it 03, Coasting stop:
Bit 03 = "0" means that the AFD immediately "lets go"
of the motor (the output transistors are "turned off"),
which means that the motor runs freely until it stops.
Bit03="1"meansthattheAFDisabletostartthe
motor, provided the other conditions for starting are
fulfilled. Note: In parameter 503 Coasting stop the
choice is made of how bit 03 is to be gated with
the corresponding function of terminal 27.
B
it 04, Quick stop:
Bit 04 = "0" leads to a stop in which the motor
speed is ramped down to stop via parameter
207 Ramp-down time.
B
it 05, Freeze output frequency:
Bit 05 = "0" means that the given output frequency (in
Hz) is frozen. The frozen output frequency can now
only be changed via the digital inputs programmed
for Speed up and Speed down.
NOTE
If Freeze output is active, the AFD cannot be
stopped via Bit 06 Start or via terminal 18. The
AFD can only be stopped in the following ways
:
• Bit 03 Coasting stop
• Termi n a l 2 7
• Bit 02 DC braking
• Terminal 19 programmed for DC braking
B
it 06, Ramp stop/start:
Bit 04 = "0" leads to a stop in which the motor
speed is ramped down to stop via parameter
207 Ramp-down time.
Bit06="1"meansthattheAFDisabletostartthe
motor, provided the other conditions for starting are
fulfilled. Note: In parameter 505 St
art a choice is made
of the way bit 06 Ramp stop/start is to be gated with
the corresponding function of terminal 18.
B
it 07, Reset:
Bit 07 = "0" leads to no reset.
Bit 07 = "1"means that a trip is reset.
MG.10.S1.22 - VLT is a registered Danfoss trademark
23
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