Danfoss VLT 2800 Design Manual page 84

Programming
If Slow down is active via a digital input, the percentage
value in parameter 219 Catch up/Slow down reference is
deducted from the remote-controlled reference.
221 Current limit, I
Value:
0 - XXX.X % of par. 105
Function:
4 4
In this parameter, the maximum output current I
The factory-set value corresponds to the maximum output
current I . If the current limit is to be used as motor
MAX
protection, set the rated motor current. If the current limit
is set above 100% (the rated output current of the
frequency converter, I
handle a load intermittently, i.e. for short periods at a time.
After the load has been higher than I
load is lower than I
current limit is set at a lower value than I
acceleration torque is reduced to the same extent.
Description of choice:
Set the required maximum output current I
223 Warning: Low current, I
Value:
0.0 - parameter 224 Warning: High current, I
Function:
If the output current drops below the preset limit I
warning is given.
Tthe signal outputs can be programmed to give a warning
signal via terminal 46 and via the relay output.
Description of choice:
Programme the lower signal limit of the output current I
within the normal working range of the frequency
converter.
82
Design Guide
LIM
), the frequency converter can only
INV
, ensure that the
INV.
for a period of time. Note that if the
INV
, the
INV.
.
LIM
LOW
HIGH
Danfoss A/S © Rev. May/2014 All rights reserved.
160 %
is set.
LIM
Illustration 4.12 Parameters for Output Current and Frequency
Limits
224 Warning: High current, I
Value:
0 - I
MAX
Function:
0.0 A
If the output current exceeds the preset limit I
warning is given.
, a
LOW The warning functions are activated when the output
frequency has reached the resulting reference. The signal
outputs can be programmed to give a warning signal via
terminal 46 and via the relay output.
Description of choice:
LAV Programme the output current's upper signal limit I
within the frequency converter's normal operating range.
See Illustration 4.12 for more details.
225 Warning: Low frequency, f
Value:
0.0 - par. 226
Warn.: High frequency, f
Function:
If the output frequency drops below the preset limit f
warning is given.
Parameters 223-228 Warning functions are out of function
during ramp-up after a start command and after stop
command or during stop. The warning functions are
activated when the output frequency has reached the
resulting reference. The signal outputs can be programmed
to give a warning signal via terminal 46 and via the relay
output.
HIGH
, a
HIGH
HIGH
LOW
0.0 Hz
HIGH
LOW
MG27E402
I
MAX
, a