Load Float; Load Check Ii; V/F Operation (A01-02 = 00) - Magnetek Impulse G+ series 4 Instruction Manual

Load Float

When Load Float (C08-10) is enabled, it maintains the motor shaft at a stationary position with brake
open. The Load Float 2 (MFDI=35) function triggers the drive to go into Load Float for the time set in
C04-01. During Load Float, the drive will open the brake and hold the motor at a zero position. A
FWD or REV run command will take priority over this function. In NLB applications, the standard
brake checks will be performed if starting from Base Block.
Parameter
C04-01
C04-02
* Dependent on kVA (

Load Check II™

The Load Check II function is a load-limiting feature which ensures the programmed load limit of the
hoist is not exceeded. It prevents the lifting (and potential stall) of a load that is overweight. When
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IMPULSE
may then be lowered at the speed that is specified by the Load Check Alarm Speed (C05-08).
Load Check II is designed to limit loads less than or equal to the crane's rated capacity.
Consult the factory and crane manufacturer before calibrating Load Check II with a load
heavier than the crane capacity.

V/f Operation (A01-02 = 00)

When using Load Check II in V/f control method (during lifting) the IMPULSE
compare the motor current readings (U01-03) to values stored during the Load Check set up
process. If they exceed the values for the active Load Check Zone, the IMPULSE
stop the motor based on the LC Alarm Action (C05-02) and display a Load Check alarm (LC).
NOTE: If an application requires Load Check to be bypassed, an MFDI may be programmed to 69
(N.O.) or 6A (N.C.)
NOTE: It is highly recommended to use OLV or FLV control methods for Load Check II.
IMPULSE®•G+ & VG+ Series 4 Instruction Manual – February 2017
5-26
Table 5-27: Load Float Time 2 Parameter Settings
Display
Load Float Time2
Load Float Gain

30 HP: 10; > 30 HP: 20)
•G+ & VG+ Series 4 detects an overload condition it prevents any further lifting. The load
Function
Maximum duration of Load Float 2
time when MFDI = 35
Load Float Gain.
D A N G E R
Range Default
0–65535 sec 10
0–100 10*
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•G+ Series 4 will
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•G+ Series 4 will