Explanation of the diagram:
● Blocked region height = current hoist position (lower edge of spreader) + P72 + P108
● If a spreader is not locked, the blocked region is placed at "lower edge of spreader + P72 +
P108".
● If the container is removed following the learning travel, i.e. if both control bits
LOCKED_BIT0 and LOCKED_BIT1 are reset, the blocked region is reduced by P108. In
other words, the blocked region is located at "lower edge of spreader + P72".
Technological explanation: When spreader A is unlocked, the blocked region must not be
lowered to below the lower edge of the spreader (see diagram "Forming blocked regions -
scenarios B and C") because a real obstacle might be present at the non-locked position of
spreader B.
Scenario D
Scenario D defines a learning travel if all of the containers are locked. It is applicable to all
spreader constellations.
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P72 Hoist safety clearance (SAM)
P78 Hoist safety clearance (MAN)
P108 Maximum container height
2 m Minimum container height
Figure 6-18 Forming blocked regions - scenario D
Explanation of the diagram:
● Blocked region height = current hoist position (lower edge of spreader) + P72 or P78 + P108
- 2 m
● If both spreaders are locked, the blocked region is placed at "lower edge of spreader + P72
or P78 + P108 - 2 m".
● If the containers are removed following the learning travel, i.e. if both control bits
LOCKED_BIT0 and LOCKED_BIT1 are reset, the blocked region is reduced by P108. In
other words, the blocked region is located at "lower edge of spreader + P72 - 2 m".
The minimum container height takes account of the possibility that some of the containers
might be lower than P108 in height.
Sway Control function description
6.10 Blocked regions
SC integrated STS, GSU
182 Operating Instructions, 07/2019, A5E48271265B AA
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