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4.6 Hoist Upper Limit and Machine Down Configuration
A No-Fly Zone can be bypassed if all the hoists are at an upper limit or the equipment/machine is in the
down position. The inputs are provided by the customer to the NFZ controller from the hoist or equipment /
machine.
When configuring the No-Fly Zone, the dimensions of the material being moved by the overhead crane
and hoist needs to be considered. The length and width of the largest materials being moved should
guide the design of the zone to allow enough distance for slow down zone, stop zone and protected
zone. In addition to the length and width, the height of the material needs to be taken into account for
fly-over No-Fly Zones when using the Hoist Upper Limit input or Machine Down input to insure proper
clearance over the top of the protected zone. Use the Hoist Lower Permissive and Clear of Machine
output to reduce risk of lowering the hoist in a No-Fly Zone.
Refer to hoist manufacturer for details.
Figure 4-9: Hoist Upper Limit and Machine Down Configuration
CAUTION
Intelli-Protect User Manual
April 2023
Page 43 of 65
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