VLT
®
FCD Series
Programming, FCD
300
NB!:
If Freeze output is active the frequency converter
can only be stopped if you select Motor coast,
Quick stop or DC braking via a digital input.
Speed up and Speed down are selected if digital
control of the up/down speed is required. This
function is only active if Freeze reference or Freeze
output frequency has been selected.
If Speed up is active the reference or output frequency
will be increased, and if Speed down is active the
reference or output frequency will be reduced. The
output frequency is changed via the preset ramp
times in parameters 209-210 Ramp 2.
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.
29
Term.
33
Freeze ref/
freeze outp.
Function
0 0 1 No speed change
0
1 1 Speed up
1
0 1 Speed down
1
1 1 Speed down
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 .
Slow-down Catch-up Function
0 0 Unchanged speed
0
1Increaseby%value
1
0Reduceby%value
1
1Reduceby%value
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 and Preset reference, msb
makes it possible to select one of the four preset
references, see the table below:
Preset ref.
msb
Preset ref.
lsb
Function
0 0Presetref.1
0
1Presetref.2
1
0Presetref.3
1
1Presetref.4
Preset reference on is used for shifting between
remote-controlled reference and preset reference.
It is assumed that External/preset [2] has been
selected in parameter 214 Reference function. Logic
’0’ = remote-controlled references are active, logic
’1’ = one of the four preset references is active,
as can be seen from the table above.
Precise stop, inverse is selected to obtain a high
degree of accuracy when a stop command is
repeated. A logic 0 means that the motor speed 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 Minimum referen ce,
Ref
MIN
. The frequency set in parameter 327/328
Pulse Max 33/29 corresponds to parameter
205 Maximum reference Ref
MAX
.
Pulse feedback is selected if the feedback signal
used is a pulse train (frequency). In parameter
327/328 Pulse Max 33/29 the maximum pulse
feedback frequency is set.
Pulse input is selected if a specific number of pulses
must lead to a Precise stop, see parameter 343
Precise stop and parameter 344 Counter value.
Selection of S etup, lsb and Selection of Se tup,
msb gives the possibility to select one of the
four setups. It is, however, a condition that
parameter 004 is set to Multisetup.
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 Minimum referen ce,
Ref
MIN
. The frequency set in parameter 327/328
Pulse Max 33/29 corresponds to parameter
205 Maximum reference Ref
MAX
.
Encoder feedback is selected if the feedback signal
used is a pulse train (frequency). In parameter
327/328 Pulse Max 33/29 the maximum pulse
feedback frequency is set.
Encoder input is selected if a specific number of
pulses must lead to a Precise stop, see parameter 343
Precise stop and parameter 344 Counter value.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.04.B7.02 - VLT is a registered Danfoss trademark
59
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