Siemens SINUMERIK 840D sl Function Manual page 201
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Special cases of LookAhead
Axis-specific feed stop and axis-specific axis disable are ignored by LookAhead.
If an axis is to be interpolated that should on the other hand be made stationary by axis-
specific feed stop or axis disable, LookAhead does not stop path movement before the block
in question but decelerates in the block itself.
If this response is not wanted, an axis-specific feed stop can be transferred to a channel via
the PLC to stop the path immediately.
See also:
/FB1/ Function Manual, Basic Functions; axis jamming(A3).
Basic logic functions: Continuouspath Mode, Exact Stop, LookAhead (B1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Detailed description
2.4 LookAhead
49
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