Siemens SIMATIC ET 200S - Fundamentals of Controlled Positioning Using the Analog Output

1PosSSI/Analog
6.5 Fundamentals of Controlled Positioning Using the Analog Output
ET 200S Positioning
Operating Instructions, 05/2007, A5E00124871-04
251
6.5 Fundamentals of Controlled Positioning Using the Analog Output
Positioning Operation
From the start position, the speed is increased (rapid feed) and the destination is
approached at this speed. At a preset distance from the destination (switchover point), there
is a change to a lower speed (creep feed).
Shortly before the axis reaches the destination and also at a preset distance to the
destination, the drive can either be switched off (switch-off point) or be slowed down from
creep feed to 0.
To facilitate understanding, the change in speed is illustrated over the path traversed.
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Figure 6-3 Switching points and switching differences