VLT
®
6000 HVAC
99MG.60.B1.02 - VLT is a registered Danfoss trade mark
★ = factory setting. ( ) = display text [ ] = value for use in communication via serial communication port
Programming
Preset reference, lsb Preset reference, lsb
Preset reference, lsb Preset reference, lsb
Preset reference, lsb and
Preset reference, msbPreset reference, msb
Preset reference, msbPreset reference, msb
Preset reference, msb
enables a choice of one of the four preset references,
in accordance with the table below.
Preset ref. msb Preset ref. lsb
Preset ref. 1 0 0
Preset ref. 2 0 1
Preset ref. 3 1 0
Preset ref. 4 1 1
Speed upSpeed up
Speed upSpeed up
Speed up
and and
and and
and
Speed downSpeed down
Speed downSpeed down
Speed down
are selected if digital
control of the up/down speed is desired. This
function is only active if Freeze reference or Freeze
output has been selected.
As long as there is a logic ‘1’ on the terminal selected
for Speed up, the reference or the output frequency
will increase by the Ramp-up time set in parameter
206.
As long as there is a logic ‘1’ on the terminal selected
for Speed down, the reference or the output
frequency will increase by the Ramp-down time set in
parameter 207.
Pulses (logic ‘1‘ minimum high for 3 ms and a mini-
mum pause of 3 ms) will lead to a change of speed of
0.1% (reference) or 0.1 Hz (output frequency).
Example:
Terminal Terminal Freeze ref./
(16) (17) Freeze output
No speed change 0 0 1
Speed down 0 1 1
Speed up 1 0 1
Speed down 1 1 1
The speed reference frozen via the control panel can
be changed even if the VLT frequency converter has
stopped. In addition, the frozen reference will be
rememberd in case of a mains failure.
Run permissive.Run permissive.
Run permissive.Run permissive.
Run permissive. There must be an active start signal
via the terminal, where Run permissive has been
programmed, before a start command can be
accepted. Run permissive has a logic ‘AND’ function
related to Start (terminal 18, parameter 302 Terminal
18, Digital input), which means that in order to start
the motor, both conditions must be fulfilled. If Run
permissive is programmed on several terminals, Run
permissive must only be logic ‘1’ on one of the
terminals for the function to be carried out. See
application example on page 68.
Jog Jog
Jog Jog
Jog is used to override the output frequency to the
frequency set in parameter 209 Jog frequency and
issue a start command. If local reference is active, the
VLT 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 lockData change lock
Data change lockData change lock
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 referencePulse reference
Pulse referencePulse reference
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 feedbackPulse feedback
Pulse feedbackPulse feedback
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 startHand start
Hand startHand start
Hand start is selected if the VLT 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 VLT frequency converter starts the motor. A
logic ‘0’ means that the connected motor stops. The
VLT frequency converter will then be in OFF/STOP
mode, unless there is an active Auto start signal. See
also the description on page 70.
NB!
An active Hand and Auto signal via the digital
inputs will have higher priority than the [HAND
START]-[AUTO START] control keys.
Auto startAuto start
Auto startAuto start
Auto start is selected if the VLT frequency converter
is to be controlled via an external auto/off or H-O-A
switch. A logic ’1’ will place the VLT 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 VLT
frequency converter will then be in OFF/STOP mode.
See also the description on page 70.
To Next Page
Loading...
Need help?
General