Siemens SIMOTION D4x5-2 DP/PN Operating Instructions Manual page 445

Skew
Rotation of the spreader in a clockwise/counterclockwise direction from the perspective of the
crane driver (in the crane driver's cabin).
Skew damping
Describes the function used to implement skew oscillation control.
STS (Ship to Shore) container cranes
STS cranes use spreaders or double spreaders to transport containers from a ship to shore or
vice versa.
Sway control
Sway control refers to the control system for reducing sway.
Technology object (TO)
The SIMOTION runtime system is implemented in an object-oriented rather than a function-
oriented manner, i.e. independent "technology objects (TO)" are used.
Technology objects have a high degree of functionality integrated into them. For example, a
"TO axis" contains the capability for communication with the drive, as well as measured value
processing, position control, and positioning functions.
Technology objects offer the user a technological view of actuators and sensors and provide
technological functions for these, for example, the technology object "Axis for drive and
encoder."
Trim
Tilting motion of the spreader to the left/right from the perspective of the crane driver (in the
crane driver's cabin).
Trolley
Trolley refers to the hoist traverse mechanism of the crane.
Twistlocks
Twistlocks are interlocks that connect the spreader to the container. The state of the twistlocks
is acquired by the control bits LOCKED_BIT0 and LOCKED_BIT1 (twistlock bits).
SC integrated STS, GSU
Operating Instructions, 07/2019, A5E48271265B AA
Glossary
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