BLEMO ER24 Series, Руководство по программированию

Страница: 270 / 344

Configuration Mode (ConF)
270
Process underload detected fault
A proces s underload is detected when the next event occurs and rem ains pending for a m inim um tim e
[Unld T. Del. Detect]
(ULt) , which is configurable:
•
The m otor is in s teady s tate and the torque is below the s et underload limit ( [Unld. Thr. 0. Speed.] ( LUL ) ,
[Unld. Thr. Nom. Speed.] (
LUn
)
,
[Unld. Freq. Thr. Det.] (
rMUd
)
param eters ).
•
The m otor is in s teady s tate when the offs et between the frequency reference and m otor frequency falls
below the configurable thres hold
[Hysteresis Freq. Att.]
(Srb) .
Torque as a % of
the rated torque
Betw een zero frequency and the rated frequency,
the curve reflects the follow ing equation:
torque =
LUL
+
( LUn - LUL ) x (frequency)
2
(rated frequency)
2
The underload function is not active for
frequencies below
[Unld. Freq. Thr. Det.] ( rMUd ) .
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)
ULd- [PROCESS UNDERLOAD]
ULt
[Unld T. Del. Detect.]
0 to 100 s 0 s
Underload detection time delay.
A value of 0 deactivates the function and makes the other parameters inaccessible.
LUn
*

[Unld. Thr. Nom. Speed.]
20 to 100% 60%
Underload threshold at rated motor frequency ( [Rate d m otor freq.] (FrS) page 86 ), as a % of the rated motor torque.
LUL
*

[Unld. Thr. 0. Speed.]
0 to
[Unld.Thr.Nom.Speed]
(LUn)
0%
Underload threshold at zero frequency, as a % of the rated motor torque.
rMUd
*

[Unld. Freq. Thr. Det.]
0 to 599 Hz 0 Hz
Minimum frequency underload detection threshold.
Srb
*

[Hysteresis Freq. Att.]
0.3 to 599 Hz 0.3 Hz
Maximum deviation betw een the frequency reference and the motor frequency, which defines steady state operation.
Parameters described in this page can be accessed by:
DRI- > CONF > FULL > FLT - > ULD-
zone
0