BLEMO ER24 Series - Fst [RAM P DIVIDER]; Lff [Fallback Speed]; Old [PROCESS OVERLOAD]

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 state 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 offset 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 ass igned to the signaling of this detected fault in the
[INPUTS / OUTPUTS CFG] ( I_ O-) m enu.
Code Nam e / De s cription Adjustment range Factory setting
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 [Rated 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]
[Freew heel] (YES)
Behavior on sw itching to overload detection.
[Ignore ] (nO): Detected fault ignored
[Freew heel] (YES): Freew heel stop
[Ram p s top] (rMP): Stop on ramp
[Fast 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)
F
S
t
-
[RAMP DIVIDER]
dCF
*

(1)
[Ramp divider]
0 to 10 4
The ramp that is enabled ( [Dece leration] (dEC) or [Dece leration 2] (dE2)) is then divided by this coefficient when stop
requests are sent.
Value 0 corresponds to a minimum ramp time.