VLT
®
6000 HVAC Series
Programming
Aslongasthereisalogic‘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:
Ter minal Te rminal Free ze 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 p
anel
can be changed even if the frequency converter has
stopped. In addition, the frozen reference will be
remembered in case of a mains fail
ure.
Run permissive.Theremustbean
active start
signal via the terminal, where Run permissive has
been programmed, before a start command can be
accepted. Run permissive ha
s 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 condi
tions 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 a
lways be in
Open loop [0], regardless of the selection made
in para
meter 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 pa
rameters 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
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