Siemens SIMOTION D4x5-2 DP/PN Operating Instructions Manual page 329

Figure 9-8
Figure 9-9
The figures show clearly the different deceleration points depending on the velocity. For fixed
prelimit switches, this point is always at the same trolley position (P115 = 0).
Although the behavior is similar for hoist (P64, P68), the behavior on the landside and the
behavior on the waterside differ. On the waterside, the lower dynamic prelimit switch does not
act in order to allow the immersion in the ship's hold. In this case, the crane control system must
ensure that damage cannot occur to the crane or the ship.
Note
If P115 = 0, ensure that the correct operation of the prelimit switches is guaranteed.
The fixed prelimit switches are completely independent of the path measuring system and
function even if the encoders are not installed or are not functioning reliably. This is standard
practice, especially in industrial cranes.
SC integrated STS, GSU
Operating Instructions, 07/2019, A5E48271265B AA
Trolley behavior with dynamic prelimit switches at full velocity
Trolley behavior with dynamic prelimit switches at half velocity
Commissioning AddOn Software
9.4 Sway control commissioning
329