Danfoss VLT 6000 HVAC Series User Manual

206 Ramp-up time
(RAMP UP TIME)
Value:
1 - 3600 sec.
Depends on the unit
Function:
The ramp-up time is the acceleration time from 0 Hz to
the rated motor frequency f
M,N
(parameter 104 Motor
frequency, f
M,N
). It is assumed that the output current
does not reach the current limit (set in parameter
215 Current limit I
LIM
).
Description of choice:
Program the desired ramp-up time.
207 Ramp-down time
(RAMP DOWN TIME)
Value:
1 - 3600 sec.
Depends on the unit
Function:
The ramp-down time is the deceleration time from the
rated motor frequency f
M,N
(parameter 104 Motor fre-
quency, f
M,N
) to 0 Hz, provided there is no overvoltage
in the inverter because of the motor acting as a gen-
erator.
Description of choice:
Program the desired ramp-down time.
208 Automatic ramp-down
(AUTO RAMPING)
Value:
Disable (DISABLE) [0]
Enable (ENABLE) [1]
Function:
This function ensures that the frequency converter
does not trip during deceleration if the ramp-down time
set is too short. If, during deceleration, the frequency
converter registers that the intermediate circuit voltage
is higher than the max. value (see list of warnings and
alarms), the frequency converter automatically ex-
tends the ramp-down time.
NB!
If the function is chosen as Enable [1], the
ramp time may be considerably extended
in relation to the time set in parameter 207
Ramp-down time.
Description of choice:
Program this function as Enable [1] if the frequency
converter periodically trips during ramp-down. If a
quick ramp-down time has been programmed that may
lead to a trip under special conditions, the function can
be set to Enable [1] to avoid trips.
209 Jog frequency
(JOG FREQUENCY)
Value:
Par. 201 Output frequency Low limit -
par. 202 Output frequency high limit
10.0 HZ
Function:
The jog frequency f
JOG
is the fixed output frequency at
which the frequency converter is running when the jog
function is activated.
Jog can be activated via the digital inputs.
Description of choice:
Set the desired frequency.
VLT
®
6000 HVAC Series
= factory setting, () = display text, [] = value for use in communication via serial communication port
118 MG.61.B5.02 - VLT
®
is a registered Danfoss trademark

Danfoss VLT 6000 HVAC Series Specifications

General

Brand	Danfoss
Model	VLT 6000 HVAC Series
Category	DC Drives
Language	English