Danfoss VLT 8000 AQUA series Operating Instructions Manual page 111

206 Ramp-up time
(RAMP UP TIME)
Value:
1 - 3600 sec.
Function:
The ramp-up time is the acceleration time from 0
Hz to the rated motor frequency f
104 Motor frequency, f ). It is assumed that the
M,N
output current does not reach the current limit (set
in parameter 215 Current limit I
Description of choice:
Program the desired ramp-up time.
207 Ramp-down time
(RAMP DOWN TIME)
Value:
1 - 3600 sec.
Function:
The ramp-down time is the deceleration time
from the rated motor frequency f
104 Motor frequency, f
M,N
there is no overvoltage in the inverter because of
the motor acting as a generator.
Description of choice:
Program the desired ramp-down time.
208 Automatic ramp-down
(AUTO RAMPING)
Value:
Disable (DISABLE)
Enable (ENABLE)
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
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.83.A2.02 - VLT is a registered Danfoss trademark
Depends on the unit
(parameter
M,N
).
LIM
Depends on the unit
(parameter
M,N
) to 0 Hz, provided
[0]
[1]
®
VLT 8000 AQUA
of warnings and alarms), the frequency converter
automatically extends 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
Function:
The jog frequency f is the fixed output frequency
JOG
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.
10.0 HZ
111