16.2.5 Approaching Switching Position - Siemens SINUMERIK 840D sl Function Manual

Value below minimum switching position distance
For path length-related switching signal output, the value may fall below the minimum
switching position distance, e.g. due to:
• Increase in feed rate
• Decrease in programmable switching position distance s
The following reactions take place if the value falls below the minimum:
• Alarm 75501 "Channel %1 HSLC: CC_FASTON_CONT speed too high" is displayed.
• The switching signal at the current switching position is omitted. To maintain the
machining rhythm, the function also suppresses the switching signal at the following
switching position.
The position of all the following switching positions is not affected by this. In the further
course of the path, one can witness alternating output and suppression of two switching
signals following each other.

16.2.5 Approaching switching position

If in block-related switching signal output a switching position is not reached exactly, e.g. in
continuous-path mode and travel in more than one geometry axis, then switching takes place
at the instant at which the positional difference between the actual position of the geometry
axes involved and the programmed switching position increases again.
Figure 16-2
Special Functions
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
TE8: Cycle-independent path-synchronous switching signal output
Switching position offset in path control mode
16.2 Functional description
and s
1 2
653