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VLT
®
6000 HVAC Series
Programming
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 minimum
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 frequency converter has
stopped. In addition, the frozen reference will be
remembered in case of a mains failure.
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
Example of
application - Speed control of fan in ventilation system.
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 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.
Fire Mode
is selected if the Fire Mode function is to
be activated via a logical
’
1
’
on terminal 16 or 17. This
enables the frequency converter to run without trip lock
in case of alarms or warnings. If an alarm causes a trip
an automatic reset is activated. Please note Fire Mode
must be enabled in parameter 430 for terminal 16 or
17 to activate the Fire Mode. The frequency converter
will run at the in parameter 431 selected speed.
Only by setting input 16 or 17 low or opening
terminal 27 deactivates fire mode again.
Fire Mode inverse
is selected if the Fire Mode
function is to be activated via a logical
’
0
’
on terminal
16 or 17. This enables the frequency converter to
run without trip lock in case of alarms or warnings.
If an alarm causes a trip an automatic reset is
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.61.A5.02 - VLT is a registered Danfoss trademark
103