192
[1.8 FAULT MANAGEMENT]
(FLt-)
Process overload fault
A process overload is detected when the next event occurs and remains pending for a minimum time (tOL), which is configurable:
• The drive is in current limitation mode.
• The motor is in steady state and the current is above the set overload threshold (LOC).
The motor is in steady state when the offset between the frequency reference and motor frequency falls below the configurable
threshold (Srb).
A relay or a logic output can be assigned to the signaling of this fault in the
[1.5 INPUTS / OUTPUTS CFG]
(I-O-)
menu.
(1) The parameter can also be accessed in the
[1.3 SETTINGS]
(SEt-)
menu.
Code
Name/Description
Adjustment range
Factory setting
OLd-
•
[PROCESS OVERLOAD]
tOL
• [Unld Time Detect.]
0 to 100 s
0 s
Overload detection time delay.
A value of 0 deactivates the function and renders the other parameters inaccessible.
LOC
• [Ovld Detection Thr.]
(1)
70 to 150%
110%
Overload detection threshold, as a % of the rated motor current
[Rated mot. current]
(nCr)
. This value must
be less than the limit current in order for the function to work.
Srb
• [Hysteresis Freq.Att.]
(1)
0.3 to 500 or 1,000 Hz
according to rating
0.3 Hz
Maximum deviation between the frequency reference and the motor frequency, which defines steady state
operation.
OdL
• [Ovld.Proces.Mngmt]
[Freewheel]
(YES)
nO
YES
rMP
FSt
Behavior on switching to overload detection.
-
[Ignore]
(nO)
: Fault ignored
-
[Freewheel]
(YES)
: Freewheel stop
-
[Ramp stop]
(rMP)
: Stop on ramp
-
[Fast stop]
(FSt)
: Fast stop
FtO
• [Overload T.B.Rest.]
(1)
0 to 6 min
0 min
This parameter cannot be accessed if
[Ovld.Proces.Mngmt]
(OdL)
=
[Ignore]
(nO)
.
Minimum time permitted between an overload being detected and any automatic restart.
In order for an automatic restart to be possible, the value of
[Max. restart time]
(tAr)
page
175
must exceed
that of this parameter by at least one minute.
Parameter that can be modified during operation or when stopped.
Содержание ER40-G
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