VLT
®
8000 AQUA
Programming
■
Control word as per FC protocol
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.
Bit 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.
Bit 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.
Bit 03 = "1" means that the AFD is able to start the
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.
Bit 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
.
Bit 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
•
Terminal 27
•
Bit 02
DC braking
•
Terminal 19 programmed for
DC braking
Bit 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
.
Bit 06 = "1" means that the AFD is able to start the
motor, provided the other conditions for starting are
fulfilled. Note: In parameter 505
Start a choice
is
made of the way bit 06
Ramp stop/start
is to be gated
with the corresponding function of terminal 18.
Bit 07, Reset:
Bit 07 = "0" leads to no reset.
Bit 07 = "1"means that a trip is reset.
Reset is activated on the leading edge of the signal,
i.e. at the change from logic
’
0
’
to logic
’
1
’
.
MG.80.A7.22 - VLT is a registered Danfoss trademark
149
Rosewood STP ST42 General (Operation and Maintenance Manual - Part 4:
Section 6.3 Manufacturers Manuals 6.3.33 Danfoss VLT Aquadrive 8000) Vendor Manual
QP Id: VM207
Active: 03/09/2013
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