79
5.2.7 Dwell Function
Dwell-freq.
[SER: Code No. 18]: Start Dwell Frequency
(Factory Default: 3.00 Hz)
Range: 0 - SER 15 Hz
Dwell-time
[Ser: Code No. 19]: Start Dwell Time
(Factory Default: 0.5 sec)
Range: 0 - 10 sec.
The dwell function is used for torque proving before the brake is released. The
current is applied to the motor during the Dwell-time [SER: Code No. 19] before
releasing the brake.
Caution: Dwell frequency should be set to the slip frequency of the motor if the slip is
greater than 3 Hz. To calculate slip frequency, see Section 3.3.
Fig. 5.2.6: Brake Release Timing (Hoist)
F o u t
F o r R in p u t
B ra k e R e le a s e (A X 1 A X 2 )
D w e ll-F re q .
[S E R : C o d e N o . 1 8 ]
D w e ll T im e
[S E R : C o d e N o . 1 9 ]
F S T -fre q u e n c y
[ S E R : C o d e N o .2 5 ]
tim e
F o r R in p u t
B ra ke R e le a se (A X 1 A X 2 )
D w e ll-F re q .
[S E R : C o d e N o . 1 8 ]
D w e ll-T im e
[S E R : C o d e N o . 1 9 ]
F S T -fre q u e n cy
[S E R : C o d e N o . 2 5 ]
C u to ff F re q .
[S E R : C o d e N o . 1 7 ]
tim e
tim e
F o u t
Fig. 5.2.7: Brake release Timing (Traverse)
For more information contact: Sievert Crane and Hoist, (708) 771-1600, [email protected], www.sievertcrane.com
