BONFIGLIOLI active Applications Manual

06/0520
20 06/05
5.1.4 Speed switch-off limit
As an additional security element in the lowering of a load, a further monitoring has
been implemented. The reference value of the speed is compared with the actual
value of the speed. If the absolute value of the speed is lar
ger than the actual speed
by the value entered in the parameter
Speed switch-off limit 817, the fault "F1110
overspeed“ is triggered.
If the direction of rotation deviates from the nominal direction, the fault is output as
soon as the absolute value of the speed exceeds the adjustable threshold.
reference speed
Speed switch-off limit 817
Speed switch-off limit 817
Parameter Setting
No. Description Min. Max. Fact. sett.
817 Speed switch-off limit 0.00 Hz 999.99 Hz 10.00 Hz
With the I limit parameter, the maximum permitted speed at the detected load is
scaled.
• If the parameter
I limit 818 is enlarged, a larger maximum speed is permitted at
the same load.
• If the
I limit 818 is reduced, the maximum speed is reduced accordingly. As a
minimum, the rated speed is permitted.
f
R
2 f
R
3 f
R
4 f
R
T
const
P
const
T
R
parameter 818
load
Parameter Setting
No. Description Min. Max. Fact. sett.
818 I limit 0.01 ⋅ I
FIN
3 ⋅ o ⋅ I
FIN
I
FIN
If the parameter
Operation mode LE 822 has been set to 1 or 2, the limit is the effec-
tive value of the stator current which sets after the acceleration at the permitted
maximum speed.

BONFIGLIOLI active Specifications

General

Brand	BONFIGLIOLI
Model	active
Category	DC Drives
Language	English