transistors are "turned off"), which means that the mo-
tor runs freely to stop. Logic '0' leads to coasting to
stop.
Reset and coasting inverse
are used to activate motor
coast simultaneously with reset. Logical '0' means mo-
tor coast stop and reset. Reset is activated on the
falling edge.
Quick stop inverse
is used for activating the quick-stop
ramp down set in parameter 212
Quick stop ramp-
down time.
Logic '0' leads to quick stop.
DC-braking inverse
is used for stopping the motor by
energizing it with a DC voltage for a given time, see
parameters 126, 127 and 132
DC brake
. Please note
that this function is only active if the value in parameter
126
DC braking time
and 132
DC brake voltage
is dif-
ferent from 0. Logic '0' leads to DC braking.
Stop inverse
, a logic '0' means that the motor speed is
ramped down to stop via the selected ramp.
None of the stop commands mentioned
above are to be used as repair switches.
Note that the frequency converter has
more voltage inputs than L1, L2 and L3
when the DC bus terminals are used.
Check that all voltage inputs are discon-
nected and that the prescribed time (4
mins.) has passed before repair work is
commenced.
Start
is selected if a start/stop command is required.
Logic '1' = start, logic '0' = stop.
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 motor can be
stopped by briefly activating
Stop inverse
.
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
Process regulation, closed loop
. See also parameter 200
Output frequency range/di-
rection
.
Reversing and start
is used for start/stop and for re-
versing with the same signal. No active start command
is allowed at the same time. Acts as latch start revers-
ing, provided latch start has been chosen for terminal
18. Is not active for
Process regulation, closed loop
.
See also parameter 200
Output frequency range/di-
rection
.
Start clockwise
is used if you want the motor shaft only
to be able to rotate clockwise when started. Should not
be used for
Process regulation, 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
Process regulation, closed
loop
. See also parameter 200
Output frequency range/
direction
.
Jog is used to override the output frequency to the jog
frequency set in parameter 213
Jog frequency
. Jog is
active regardless of whether a start command has
been given, yet not when
Coast stop
,
Quick-stop
or
DC braking
are active.
Freeze reference
freezes the present reference. The
reference can now only be changed via
Speed up
and
Speed down
. If
freeze reference
is 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
Speed up
and
Speed down
.
NB!
If
Freeze output
is active the frequency
converter can only be stopped if you se-
lect
Motor coast
,
Quick stop
or
DC brak-
ing
via a digital input.
Speed up
and
Speed down
are selected if digital con-
trol of the up/down speed is required. This function is
only active if
Freeze reference
or
Freeze output frequen-
cy
has been selected.
If
Speed up
is active the reference or output frequency
will be increased, and if
Speed down
is active the ref-
erence or output frequency will be reduced. The output
frequency is changed via the preset ramp times in pa-
rameters 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 frequen-
cy). Example:
= factory setting, () = display text, [] = value for use in communication via serial communication port
86
MG.27.E2.02 - VLT is a registered Danfoss trademark
