Siemens SINUMERIK 840D sl, Function Manual

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Detailed description
2.1 Predefined auxiliary functions
Basic logic functions: Auxiliary Function Output to PLC (H2)
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Function Manual, 11/2006, 6FC5397-0BP10-2BA0
Bit6: Output during motion
The auxiliary function is output during the traverse movements programmed in the part
program block (path and/or block-related positioning axis movements).
Bit7: Output at block end
The auxiliary function is output after completion of the traverse movements programmed in
the part program block (path and/or block-related positioning axis movements).
Bit8: No output after a block search
The collected auxiliary function is not output after a block search.
Note
In the case of auxiliary functions for which no output behavior has been defined, the
following default output behavior is active:
• Output duration one OB1 cycle
• Output at block end
Context: Output duration and output relative to movement
Output prior to motion
•
The traverse movements (path and/or block-related positioning axis movements) of the
previous part program block end with an exact stop.
•
The auxiliary functions are output at the beginning of the current part program block.
•
Traverse movements of the current part program block (path and/or positioning axis
movements) are started after acknowledgment of the auxiliary functions by the PLC:
–
Output duration one OB1 cycle (normal acknowledgment): after one OB1 cycle
– Output duration one OB40 cycle (quick acknowledgment): after one OB40 cycle
Output during motion
•
The auxiliary functions are output at the beginning of the traverse movements (path
and/or positioning axis movements).
•
The path velocity of the current part program block is reduced so that the time to the end
of the block is greater than the time to acknowledgment of the auxiliary functions by the
PLC.
–
Output duration one OB1 cycle (normal acknowledgment): one OB1 cycle
– Output duration one OB40 cycle (quick acknowledgment): one OB40 cycle