Siemens SIMOTION D4x5-2 DP/PN Operating Instructions Manual page 182

Sway Control function description
6.10 Blocked regions
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.
P72
P78
P108
2 m
Figure 6-18
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.
182
Hoist safety clearance (SAM)
Hoist safety clearance (MAN)
Maximum container height
Minimum container height
Forming blocked regions - scenario D
SC integrated STS, GSU
Operating Instructions, 07/2019, A5E48271265B AA