Siemens SINAMICS S150 NEMA, Руководство по эксплуатации

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Functions, monitoring and protective functions
9.4 Extended functions
Enclosed Drives
658
Operating Instructions, 12/2018, A5E36652151A
Jerk limit
Acceleration and deceleration can change suddenly if jerk limiting has not been activated.
The diagram below shows the traversing profile when jerk limitation has not been activated.
The maximum acceleration (a
max
) and deceleration (d
max
) are in this case effective
immediately. The drive accelerates until the target speed (v
target
) is reached and then
switches to the constant velocity phase.
Figure 9-42 Jerk limitation deactivated
Jerk limitation can be used to achieve a ramp-like change of both variables, This ensures
"smooth" acceleration and braking as shown in the diagram below. Ideally, acceleration and
deceleration should be linear.
Figure 9-43 Jerk limitation activated
The maximum gradient (r
k
) can be set in parameter p2574 (jerk limitation) in unit LU/s
3
for
both acceleration and braking. The resolution is 1000 LU/s
3
. To activate the limitation
permanently, set parameter p2575 (Activate jerk limitation) to 1. In this case, limitation
cannot be activated or deactivated in traversing block mode by means of the command
"JERK" Activating/deactivating the limiting in the traversing block mode requires parameter
p2575 (Activate jerk limitation) to be set to zero. The status signal r2684.6 (Jerk limitation
active) indicates whether or not jerk limitation is active.