Siemens SINUMERIK 840D sl Function Manual

Detailed description
2.4 LookAhead
Basic logic functions: Continuouspath Mode, Exact Stop, LookAhead (B1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
49
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).

Siemens SINUMERIK 840D sl Specifications

General

Control Type	CNC
Number of Axes	Up to 31
Max Number of Channels	10
Interfaces	Ethernet, PROFIBUS, PROFINET, USB
Interpolation	5-axis interpolation
Operating Temperature	0°C to 45°C
Relative Humidity	Up to 95% (non-condensing)
Display	TFT color display, various sizes
Programming Languages	DIN/ISO
Safety Features	Safety Integrated
PLC	Integrated PLC S7-300
Drive Interface	SINAMICS S120
Data Storage	CF card, USB
Operating System	Windows-based