BLEMO ER24 Series, Programming Manual

Page: 272 / 344

Configuration Mode (ConF)
272
Process overload detected fault
A proces s overload is detected when the next event occurs and rem ains pending for a m inim um tim e
[Ovld Time Detect.]
(tOL) , which is configurable:
•
The drive is in current lim itation m ode.
•
The m otor is in s teady s tate and the current is above the s et overload thres hold
[Ovld Detection Thr.] (LOC) .
The m otor is in s teady s tate when the offs et between the frequency reference and motor frequency falls below
the configurable thres hold
[Hysteresis Freq. Att.]
(Srb) .
A relay or a logic output can be as s igned to the s ignaling of this detected fault in the
[INPUTS / OUTPUTS CFG]
(I_O-) m enu.
Code Nam e / De s cription Adjus tment range Factory s e tting
FLt-
[FAULT MANAGEMENT] (continued)
OLd-
[PROCESS OVERLOAD]
tOL [Ovld Time Detect.]
0 to 100 s 0 s
Overload detection time delay.
A value of 0 deactivates the function and makes the other parameters inaccessible.
LOC
*

(1)
[Ovld Detection Thr.]
70 to 150% 110%
Overload detection threshold, as a % of the rated motor current [Rate d m ot. current] (nCr) page 86 . This value must be less
than the limit current in order for the function to w ork.
Srb
*

(1)
[Hysteresis Freq.Att.]
0 to 599 Hz 0.3 Hz
Maximum deviation betw een the frequency reference and the motor frequency, which defines steady state operation.
OdL
*
nO
YES
rMP
FSt
[Ovld.Proces.Mngmt]
[Fre e w heel] (YES)
Behavior on sw itching to overload detection.
[Ignore ] (nO) : Detected fault ignored
[Fre e w heel] (YES) : Freew heel stop
[Ram p s top]
(rMP) : Stop on ramp
[Fas t s top] (FSt) : Fast stop
FtO
*

(1)
[Overload T.B.Rest.]
0 to 6 min 0 min
This parameter cannot be accessed if [Ovld.Proces.Mngmt] (OdL) is set to [Ignore] (nO) .
Minimum time permitted betw een an overload being detected and any automatic restart.
In order to allow an automatic restart, the value of
[Max. resta rt time]
(tAr) page 252 must exceed this paramet er by at least
one minute.
FLt-
[FAULT MANAGEMENT] (continued)
LFF- [FALLBACK SPEED]
LFF [Fallback speed]
0 to 599 Hz 0 Hz
Selection of the fallback speed.
FLt- [FAULT MANAGEMENT] (continued)
FSt-
[RAMP DIVIDER]
dCF
*

(1)
[Ramp divider]
0 to 10 4
The ramp that is enabled ( [De ce le ration] (dEC) or [De ce le ration 2] (dE2) ) is then divided by this coefficient when stop
requests are sent.
Value 0 corresponds to a minimum ramp time.