Pre-Start Sequence
4-45
4
iControl DC
Allow machine to be energized: While doors are closing with motor &
partially picked brake
This Pre-Start Sequence option allows the motor to be fully energized and the brake to be par-
tially energized while the doors are closing, so that when the doors become locked, the car can
begin moving as soon as the brake is fully picked. The diagram below shows the parameters that
affect this option and the resulting sequence of operation.
Door Open
Limit High
Prestart Sequence
Delay
Pick Voltage
Partial Pick
Voltage
Hold Voltage
Motor
Contactor/
Drive Enable
Brake
Contactor
Doors
Locked High
Pick Delay
Speed Pick
Delay 2
Hold Delay
Speed Pick Delay 1
Pattern
Applied
80% of
Pick Voltage
Prestart Sequence with Motor and Partially Picked Brake
Pattern
Brake
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