Siemens SINUMERIK 840D sl Function Manual page 11

Brief description
Content
The PLC/NCK interface comprises a data interface on one side and a function interface on
the other. The data interface contains status and control signals, auxiliary functions and G
functions, while the function interface is used to transfer jobs from the PLC to the NCK.
This Description describes the functionality of interface signals, which are of general
relevance but are not included in the Descriptions of Functions.
• Asynchronous events
• Status signals
• PLC variable (read and write)
Basic logic functions: Various NC/PLC interface signals and functions (A2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
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