P3: Basic PLC Program for SINUMERIK 840D sl
13.7 Interface structure
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
867
Figure 13-7 PLC/NCK channel interface
PLC/axis, spindle, drive signals
The axis-specific and spindle-specific signals are divided into the following groups:
• Shared axis/spindle signals
• Axis signals
• Spindle signals
• Drive signals
The signals are transmitted cyclically at the start of OB 1 with the following exceptions:
Exceptions include:
• Axial F value
•M value
•S value
An axial F value is entered via the M, S, F distributor of the basic program if it is transferred to the PLC during the
NC machining process.
The M and S value are also entered via the M, S, F distributor of the basic program if one or both values require
processing.
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