Controlled Stop; Terminating A Travel Operation - Siemens SIMOTION D4x5-2 DP/PN Operating Instructions Manual

Sway Control function description

6.7 Terminating a travel operation

This way the drives are activated and the brakes opened in the crane control system. As soon
as the brakes are open, the output velocity is enabled with the BRAKE_CLOSED control bit.
The output velocity is output and the drive starts.
Vice versa: Sway controlled travel is completed once both direction signals have been reset.
The brake can then be closed again in the crane control system.
Note
Avoiding dead times
The brake must be closed when no further direction signals are set and opened if the opposite
is the case. The real mechanical brake opening times (0.5 s ... 1.0 s) mean a time delay occurs
between the "brake open" signal and "brake closed" signal. For this reason, the "brake closed"
signal should always be applied to the BRAKE_CLOSED control bit of the relevant drive. This
can be used to prevent the closed-loop control system from exhibiting dead time behavior.
6.6

Controlled stop

The CONTROLLED_STOP control bit causes a sway-controlled stop in all modes.
One possible use is to interrupt travel in positioning mode in order to wait for a particular event.
The functionality could be combined with a dead man's switch, for example.
Stopping is complete when the POS_COMPLETED status bit is set for the relevant drive.
While braking, it is possible to reset the CONTROLLED_STOP control bit. As soon as the bit
has been reset, and the TRAVEL control bit is set, the drive starts to move again.
6.7 Terminating a travel operation
The conditions under which a travel operation can be terminated are described below.
This applies to all operating modes.
Conditions for terminating a travel operation
● The CONTROLLED_STOP control bit is set.
Consequence: Sway-controlled braking
● The TRAVEL control bit is reset.
Consequence: Braking at maximum deceleration
● The RELEASE control bit is reset.
Consequence: Braking at maximum deceleration
● The control bit for selecting the operating mode is reset.
Consequence: Braking at maximum deceleration
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SC integrated STS, GSU
Operating Instructions, 07/2019, A5E48271265B AA