Detailed Description
2.7 Structure and functions of the basic program
PLC Basic Program Solution Line (P3 sl)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-43
Concurrent axes
The distinguishing features of concurrent axes are as follows:
• They can be traversed either from the PLC or from the NC.
• They can be started from a function call on the PLC in all operating modes.
• The start is independent of NC block boundaries.
Function calls are available for positioning, indexing axes and spindles (FC 18).
,QSXW
SDUDPHWHUV
6WDUWLQJ
SDUDPHWHUV
)&
6WDUW
6WRS
)XQFW
,Q3RV
(UURU
6WDWH
6SLQ&WUO
3RV
$[LV1R
0RGH
)5DWH
Fig. 2-13 FC 18 input/output parameters
ASUBs
Asynchronous subprograms (ASUBs) can be used to activate any function in the NCK.
Before an asynchronous subprogram can be started from the PLC, it must be ensured that it
is available and prepared by the NC program or by FB 4 PI services (ASUB).
Once prepared in this way, it can be started at any time from the PLC. The NC program
running in one of the parameterized channels of FC 9 is interrupted by the asynchronous
subprogram. An ASUB is started by calling FC 9 from the user program by setting the start
parameter to 1.
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