Crane Source Space Vector SV100 - Page 65

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5.2.7 Brake Release Timing (Dwell Function)
F12: Starting Dwell Frequency (Factory Default: 3.0 Hz.)
Range:0.0 – F9 Hz.
F13: Starting Dwell Time (Factory Default: 0.5 sec. Hoist.)
Range:0.1 sec. – 10.0 sec. 0.1 sec. Traverse)
The dwell function is used for torque proving before the brake is released. The
current is applied to the motor during the Starting Dwell Time [F13] 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.
Fout
F or R input
Brake Release (B3 – B4)
F12: Starting Dwell Freq.
F13:
Starting Dwell Time
F18:
Brake Release Freq.
time
F
F or R input
Brake Release (B3 – B4)
F12: Starting Dwell Freq.
F13:
Starting Dwell Time
F18:
Brake Release Freq.
F11:
Drive Cutoff Fre
q
.
time
time
Fout
Fig. 5.2.5: Brake Release Timing (Hoist)
Fig. 5.2.6: Brake Release Timing (Traverse)