Load Detection For Hoist Application And Luffing Jib Cranes; Load Detection For Hoist Application - BONFIGLIOLI ACTIVE Applications Manual

5
The present documentation supplements the operating instructions for applications
with an extended activation of a holding brake and the function for automatic load
detection in hoist application and luffing jib cranes.
The application manual documents the additional functionality of the frequency invert-
ers in the software configurations 160, 260 and 460. These configurations supplement
the configurations 110, 210 and 410, which are described in detail in the operating
instructions.
5.1
The function for load detection for hoist application is activated by the parameter
eration mode LS
is set to zero, i.e. switched off. To activate the load detection for hoist application,
operation mode 1 or 3 must be selected.
For the load estimate, the
Turns per meter
load estimate calculates the load in the lifting application during the acceleration. It is
related to the rated torque of the machine and displayed by the actual figure
mated load
In the basic speed area, the current load or torque relative to the rated torque is addi-
tionally displayed with the actual figure
determined from the estimated load.
The maximum speed can be scaled via two parameters.
•
•
16
16

Load detection for hoist application and luffing jib cranes

Load detection for hoist application

822. In the factory setting, the Load Estimate (LE) operating mode
Operation mode
Load estimate hoist appli-
1 -
cation
Load estimate luffing jib
2 -
crane
Load estimate hoist appli-
3 -
cation
Load estimate luffing jib
4 -
crane
812 must be known. With the help of these parameter figures, the
243.
I limit
Parameter 818
Current with which the load detection calculates the permitted maximum speed.
Pull-out torque at Fmax
Parameter
The pull-out torque relative to the rated torque of the asynchronous machine ad-
missible at the maximum frequency.
The permitted maximum frequency will be adjusted
by the detected load and the
The current after the acceleration will be ob-
served.
Like 1 to start with. Then modification of the per-
mitted maximum frequency, with the result that the
adjustable maximum torque-forming reference cur-
rents of the parameters 819, 820 and 821 are
complied with.
The permitted maximum frequency will be adjusted
by the detected load and the
The current during the acceleration will be ob-
served.
Like 3 to start with. Then modification of the per-
mitted maximum frequency, with the result that the
adjustable maximum torque-forming reference cur-
rents of the parameters 819, 820 and 821 are
complied with.
Mechanical time constant
Load
242. The permitted maximum speed is
816
Function
Current Limit
818.
Current Limit
818.
811 and the system constant
Op-
Esti-
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