6
Operating
58
03.2018
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6.4
Operating hoist with frequency inverter
•
1st step: slow
•
2nd step: accelerate
When the 1st step is activated, the hoist is accelerated to slow speed and slow speed is
maintained. When the 2nd step of the pushbutton is activated, the hoist is accelerated as
long as the 2nd step is activated or until maximum speed is reached. If the pushbutton is
returned from 2nd step to 1st step before maximum speed is reached, the current speed
is maintained. If the pushbutton is then released, the speed is reduced. If the 1st step is
activated before the motion is stopped, the current speed is maintained.
Fig. 68
6.5
Emergency stop
WARNING
Safety hazard.
After an emergency stop, the operator must not restart the hoist /crane
system until a qualified person has determined that the fault which led to this function
being activated has been eliminated and no danger can arise from the continued
operation of the system.
Every hoist must have a means of disconnecting the power supply to all drives under load
from the ground.
Fig. 69
The emergency stop is on the control pendant.
1.
Press emergency stop button, the system comes to a halt.
2.
To release the emergency stop:
- on STH: turn the button in the direction shown
