Danfoss VLT Decentral FCD 300 Operating Instructions Manual page 59

3 Programming
Latched start
, if a pulse is applied for min. 14 ms, the frequency converter
will start the motor, provided no stop command has been given. The mo-
tor can be stopped by briefly activating
Reversing
is used for changing the direction of rotation of the motor shaft.
Logic '0' will not lead to reversing. Logic '1' will lead to reversing. The
reverse signal only changes the direction of rotation, it does not activate
the start. Is not active at
Output frequency range/direction
rameter 200
3
Reversing and start is used for start/stop and for reversing with the same
signal. No active start command is allowed at the same time. Is not active
Process regulation, closed loop
for
quency range/direction
.
Start clockwise
is used if you want the motor shaft only to be able to
rotate clockwise when started. Should not be used for
closed loop .
Start anticlockwise is used if you want the motor shaft only to be able to
rotate anticlockwise when started. Should not be used for
lation, closed loop
. See also parameter 200
direction
.
Jog is used to override the output frequency to the jog frequency set in
Jog frequency
parameter 213
command has been given, yet not when
braking are active.
Freeze reference
freezes the present reference. The reference can now
Speed up
only be changed via
active, it will be saved after a stop command and in the event of mains
failure.
Freeze output freezes the present output frequency (in Hz). The output
frequency can now only be changed via
NB!
If Freeze output
only be stopped if you select
or DC braking
Speed up and Speed down
speed is required. This function is only active if
output frequency has been selected.
Speed up
If is active the reference or output frequency will be increased,
Speed down
and if is active the reference or output frequency will be
reduced. The output frequency is changed via the preset ramp times in
Ramp 2
parameters 209-210
One pulse (logic '1' minimum high for 14 ms and a minimum break time
of 14 ms) will lead to a speed change of 0.1 % (reference) or 0.1 Hz
(output frequency). Example:
Term. Term. Freeze ref/freeze
29 33 outp.
0 0
0 1
1 0
1 1
Freeze reference
can be changed even if the frequency converter has
stopped. The reference will also be saved if the mains are disconnected
Catch-up/Slow-down
is selected if the reference value is to be increased
or reduced by a programmable percentage value set in parameter 219
Catch-up/Slow-down reference
56
Stop inverse .
Process regulation, closed loop
. See also pa-
.
Output fre-
. See also parameter 200
Process regulation,
Process regu-
Output frequency range/
. Jog is active regardless of whether a start
Coast stop , Quick-stop
Speed down freeze reference
and . If
Speed up and Speed down
is active the frequency converter can
Motor coast , Quick stop
via a digital input.
are selected if digital control of the up/down
Freeze reference
.
Function
1 No speed change
1 Speed up
1 Speed down
1 Speed down
.
MG.04.B8.02 - VLT is a registered Danfoss trademark
Slow-down
0
0
1
1
Ramp 2 is selected if a shift between ramp 1 (parameters 207-208) and
ramp 2 (parameters 209-210) is required. Logic '0' leads to ramp 1 and
logic '1' leads to ramp 2.
Preset reference, lsb
one of the four preset references, see the table below:
Preset ref.
msb
0
0
1
1
Preset reference on
erence and preset reference. It is assumed that External/preset [2] has
been selected in parameter 214
controlled references are active, logic '1' = one of the four preset refer-
or DC
ences is active, as can be seen from the table above.
Precise stop, inverse
a stop command is repeated. A logic 0 means that the motor speed is
is
ramped down to stop via the selected ramp.
Precise start/stop
is selected to obtain a high degree of accuracy when a
start and stop command is repeated.
Pulse reference is selected if the reference signal applied is a pulse train
.
(frequency). 0 Hz corresponds to parameter 204
Ref . The frequency set in parameter 327/328
MIN
responds to parameter 205
Pulse feedback
is selected if the feedback signal used is a pulse train
(frequency). In parameter 327/328
feedback frequency is set.
or Freeze
Pulse input is selected if a specific number of pulses must lead to a
stop
, see parameter 343
Selection of Setup, lsb
to select one of the four setups. It is, however, a condition that parameter
Multisetup
004 is set to
Reset and start can be used as a start function. If 24 V are connected to
the digital input, this will cause the frequency converter to reset and the
motor will ramp up to the preset reference.
Encoder reference
is selected if the reference signal applied is a pulse
train (frequency). 0 Hz corresponds to parameter 204
ence, Ref
. The frequency set in parameter 327/328
MIN
33/29
corresponds to parameter 205
Encoder feedback
is selected if the feedback signal used is a pulse train
(frequency). In parameter 327/328
feedback frequency is set.
Encoder input
is selected if a specific number of pulses must lead to a
Precise stop , see parameter 343
value .
All encoder settings are used in connection with dual track encoders with
direction recognition.
A track connected to terminal 29.
VLT® Decentral FCD
Catch-up Function
0 Unchanged speed
1 Increase by % value
0 Reduce by % value
1 Reduce by % value
Preset reference, msb
and makes it possible to select
Preset ref. Function
lsb
0 Preset ref. 1
1 Preset ref. 2
0 Preset ref. 3
1 Preset ref. 4
is used for shifting between remote-controlled ref-
Reference function
. Logic '0' = remote-
is selected to obtain a high degree of accuracy when
Minimum reference,
Pulse Max 33/29
Maximum reference Ref .
MAX
Pulse Max 33/29 the maximum pulse
Precise stop
and parameter 344
Selection of Setup, msb
and gives the possibility
.
Minimum refer-
Maximum reference Ref
Pulse Max 33/29
the maximum pulse
Precise stop and parameter 344
cor-
Precise
Counter value
.
Pulse Max
.
MAX
Counter