80 Chapter 5 Parameter Introductions
EV2000 Series Universal Variable Speed Drive User Manual
Where,
A: thousand’s place B: Hundred’s place
C: Ten’s place D: Unit’s place
Unit’s place: overload pre-alarm
0: overload pre-alarm function is active all the time when
the drive is operating
1: overload pre-alarm function is active all the time when
the motor is operating at constant speed
Ten’s place: Actions selection for overload pre-alarm
0:The drive does not alarm and continue to run when
detecting active overload signal
1: The drive alarms and stops when detecting active
overload signal
Hundred’s place: overload threshold selection
0: ratio of load current to motor’s rated current (display
fault code of E014)
1: ratio of load current to drive’s rated current (display
fault code E013)
FL.05 defines the current threshold for overload
pre-alarm protection. The setting range is a percentage
value of rated current, please refer to FL.04.
FL.06 defines the time during which the drive current
exceeds FL.05. If the status remains after this period of
time, the drive will output pre-alarm signal.
Action
Detect time
Detect time
Detect threshold
Output current
Enabled
Time
Time
Fig. 5-74 Overload pre-alarm function
Note:
1. Overload pre-alarm detection threshold should be lower
than the overload protection threshold;
2. During the overload detection time, if the drive’s current
is smaller than FL.05, the drive will time again for FL.06
and will not alarm.
FL.07 Auto current limiting
threshold
Range:20.0~200.0%
【
depending on drive
type
】
FL.08 Frequency decrease
rate when current limiting
Range:0.00~99.99Hz/s
【
10.00Hz/s
】
FL.09 Auto current limiting
selection
Range:0~1
【
1
】
Auto current limiting function is used to limit the load
current smaller than the value defined by FL.07 in real
time. Therefore the drive will not trip due to surge
over-current. This function is especially useful for the
applications with big load inertia or big change of load.
FL.07 defines the threshold of auto current limiting. It is
a percentage of the drive’s rated current. It is default
150% for G type and 110% for P type.
FL.08 defines the decrease rate of output frequency
when the drive is in auto current limiting status.
If FL.08 is set too small, overload fault may occur. If it is
set too big, the frequency will change too sharply and
therefore, the drive may be in generating status for long
time, which may result in overvoltage protection.
Auto current limiting function is always active in Acc or
Dec process. Whether the function is active in constant
speed operating process is decided by FL.09.
FL.09
＝
0, Auto current limiting function is disabled in
constant speed operating process;
FL.09
＝
1, Auto current limiting function is enabled in
constant speed operating process;
In auto current limiting process, the drive’s output
frequency may change; therefore, it is recommended not
to enable the function when the drive’s output frequency
is required stable.
When the auto current limiting function is enabled, if
FL.07 is set too low, the output overload capacity will be
impaired.
FL.10 Auto reset times
Range:0~10
【
0
】
FL.11 Reset interval
Range:2.0~20.0s
【
5.0s
】
Auto reset function can reset the fault in preset times
and interval. When FL.10 is set to 0, it means “auto
reset” is disabled and the protective device will be
activated in case of fault.
Note:
The IGBT protection (E010) and external equipment fault
(E015) cannot be reset automatically.
During the reset interval, the drive stops output and
operates at zero frequency. It will restart on the fly after
reset.
Be careful in using auto-reset function, otherwise human
injury or material loss may occur.
FL.12 Protective action 1
Range: 000~111
【
000
】
FL.13 Protective action 2
Range: 0000~3211
【
0000
】
Under some abnormal conditions, the drive can be set to
ignore them and continue to operate without alarm or
taking protective action through FL.12 and FL.13.
