VLT® 7000 Booster
215 Current limit, I
LIM
(CURRENT LIMIT)
Value:
0.1 - 1.1 x I
VLT,N
✭ 1.1 x I
VLT,N
[A]
Function:
This is where the maximum output current I
LIM
is set.
The factory setting corresponds to the rated output
current. Current limit should not be used for motor
protection; parameter 117 is for motor protection.
Current limit is for protection of the frequency converter.
If the current limit is set within the range of 1.0-1.1
xI
VLT,N
(the rated output current of the frequency
converter), the frequency converter can only handle a
load intermittently, i.e. for short periods at a time. After
the load has been higher than I
VLT,N
,itmustbeensured
that for a period the load is lower than I
VLT,N
. Please
note that if the current limit is set to less than I
VLT,N
,the
acceleration torque will be reduced correspondingly.
If the drive is in current limit and a stop command
is initiated with the stop button on the LCP key
pad, the drive output is immediately turned off
and the motor will coast to a stop.
Description of choice:
Set the required maximum output current I
LIM
.
216 Frequency bypass, bandwidth
(FREQUENCY BYPASS B.W.)
Value:
0 (OFF) - 100 Hz
✭ Disable
Function:
Some systems call for some output frequencies to be
avoided because of mechanical resonance problems.
The frequencies to avoid can be programmed in
parameters 217-220 Frequency bypass .
In this parameter (216 Frequency bypass, bandwidth),
a definition can be given of a bandwidth around
each of these frequencies.
Description of choice:
The bypass bandwidth is equal to the programmed
bandwidth frequency. This bandwidth will be centered
around each bypass frequency.
217 Frequency bypass 1
(BYPASS FREQ. 1)
218 Frequency bypass 2
(BYPASS FREQ. 2)
219 Frequency bypass 3
(BYPASS FREQ. 3)
220 Frequency bypass 4
(BYPASS FREQ. 4)
Value:
0 - 120/1000 HZ
✭ 120.0 Hz
The frequency range depends on the selection made
in parameter 200 Output frequency range.
Function:
Some systems call for some output frequencies
to be avoided because of mechanical resonance
problems in the system.
Description of choice:
Enter the frequencies to be avoided.
221 Warning: Low current, I
LOW
(WARN. LOW CURR.)
Value:
0.0 - par. 222 Warning: High current I
HIGH
,
✭ 0.0A
Function:
When the motor current is below the limit, I
LOW
,
programmed in this parameter, the display shows a
flashing CURRENT LOW, provided Warning [1] has
been selected in parameter 409 Function in case of no
load. The frequency converter will trip if parameter 409
Function in case of no load has been selected as Trip [0].
The warning functions in parameters 221-228 are
not active during ramp-up after a start command,
ramp-down after a stop command or while
stopped. The warning functions are activated when
the output frequency has reached the resulting
reference. The signal outputs can be programmed
to generate a warning signal via terminal 42 or
45 and via the relay outputs.
Description of choice:
The lower signal limit I
LOW
must be programmed within
the normal working range of the frequency converter.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.70.A1.02 - VLT is a registered Danfoss trademark
64
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