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VLT
®
8000 AQUA
Programming
active, the frequency converter will always be in
Open loop
[0], regardless of the selection made
in parameter 100
Configuration
.
Jog is not active if a stop command has been
given via terminal 27.
Data change lock
is selected if data changes
to parameters are not to be made via the control
unit; however, it will still be possible to carry
out data changes via the bus.
Pulse reference
is selected if a pulse sequence
(frequency) is selected as a reference signal. 0 Hz
corresponds to Ref
MIN
, parameter 204
Minimum
reference, Ref
MIN
. The frequency set in parameter
327
Pulse reference, max. frequency
corresponds to
parameter 205
Maximum reference, Ref
MAX
.
Pulse feedback
is selected if a pulse sequence
(frequency) is selected as a feedback signal.
Parameter 328
Pulse feedback, max. frequency
is
where the maximum frequency for pulse feedback is set.
Hand start
is selected if the frequency converter is
to be controlled by means of an external hand/off
or H-O-A switch. A logic ‘1
’
(Hand start active) will
mean that the frequency converter starts the motor.
A logic "0" means that the connected motor stops.
The frequency converter will then be in OFF/STOP
mode, unless there is an active
Auto start signal
.
See also the description in
Local control
.
NB!:
An active Hand and Auto signal via the digital
inputs will have higher priority than the [HAND
START]-[AUTO START] control keys.
Auto start
is selected if the frequency converter is to be
controlled via an external auto/off or H-O-A switch. A
logic
’
1
’
will place the frequency converter in auto mode
allowing a start signal on the control terminals or the
serial communication port. If
Auto start
and
Hand start
are active at the same time on the control terminals,
Auto start
will have the highest priority. If
Auto start
and
Hand start
are not active, the connected motor will stop
and the frequency converter will then be in OFF/STOP
mode. See also the description in
Local control
.
Latched start
will start the motor if a pulse is
applied for a minimum of 3 ms, provided there
is no stop command active. The motor will stop
if
Stop Inverse
is briefly activated.
Off stop
1)
is used for stopping the connected motor.
The stop will be effected in accordance with the
selected ramp (par. 206 and 207).
Stop inverse
1)
is activated by interrupting the voltage
to the terminal. This means that if the terminal
has no voltage, the motor cannot run. The stop
will be effected in accordance with the selected
ramp (parameters 206 and 207).
None of the above-mentioned stop
commands (start-disable) are to be used
as disconnection switch in connection
with repairs. Cut mains instead.
Motor alternation
is used with the motor alternation
function, see parameters 433 and 434 for further
information. A signal will overrule the timer, and a
forced alternation of the motor will take place. The timer
resets after completion of the alternation sequence.
1) If the frequency converter is in current limit
this function is not active.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.83.A2.02 - VLT is a registered Danfoss trademark
121