Siemens SIMOTION D4x5-2 DP/PN Operating Instructions Manual page 222

Sway Control function description
6.23 Hoist takeover
Danger to life due to failure to observe blocked regions
Blocked regions are only observed in semi-automatic mode (SAM) and, if activated, in manual
mode (MAN).
In all other modes, i.e. also in POS mode, inattention of the crane driver can result in collisions.
These collisions may result in injury or death.
● In POS mode, blocked regions must be taken into account in the crane control.
In this case, the crane driver takes over the hoist with the master switch after the start of travel
in SAM mode, for example, to lower sooner.
Provided the trolley and the hoist are in SAM mode, an operating mode switchover can be
performed by operating the master switch with the following logic:
● The operating mode of the hoist is immediately switched to MAN.
● The operating mode of the trolley is switched to POS (POS control bit) if the status bit
HOIST_TAKEOVER_OK, bit 6, is set. The trolley continues to travel automatically to the
target.
● If the HOIST_TAKEOVER_OK bit, bit 6, is not set, the trolley will also be switched to MAN
mode.
The HOIST_TAKEOVER_OK bit is set at the height where the hoist has risen above the highest
blocked region. A manual takeover of the hoist is possible as of this time. If this bit is not set,
POS mode cannot be activated for the trolley when the crane driver operates the master switch.
This can result in a collision with obstacles. SAM mode must be canceled when MAN mode is
activated for both drives.
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WARNING
SC integrated STS, GSU
Operating Instructions, 07/2019, A5E48271265B AA