Programmed Switching Position Offset - Siemens SINUMERIK 840D sl Function Manual

TE8: Cycle-independent path-synchronous switching signal output
16.2 Functional description
16.2.6

Programmed switching position offset

Programmed switching position offset
For block-related switching signal output, a positional offset of the switching position can be
programmed :
• Offset distance negative = lead
With a negative offset distance, the switching position is offset before the set point position
programmed in the part program block.
If an excessively large negative offset distance is programmed, i.e. the setpoint has
already been exceeded by the time the edge is detected, the signal is switched
immediately.
• Offset distance positive = follow-up
With a positive offset distance, the switching position is offset behind the set point position
programmed in the part program block.
Figure 16-3
Path reference
The offset distance is a positional specification that refers to the programmed path. This way
one can start from a simplified linear motion. Path curves are not taken into account.
Response to single block and G60
Due to the internal motion logic, negative offset distances (lead) have no effect when used
with the following standard functions:
• Single Block
• Exact stop at block end (G60)
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Programmed switching position offset
Function Manual, 09/2011, 6FC5397-2BP40-2BA0
Special Functions