A2: Various Nc/Plc Interface Signals And Functions; Brief Description; Nc/Plc Interface Signals - Only 840D Sl; General - Siemens SINUMERIK 840D sl Function Manual

A2: Various NC/PLC interface signals and functions

2.1

Brief description

Contents
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)
2.2

NC/PLC interface signals - only 840D sl

2.2.1

General

NC/PLC interface
The NC/PLC interface comprises the following parts:
● Data interface
● Function interface
Data interface
The data interface is used for component coordination:
● PLC user program
● NC
● HMI (operator control component)
● MCP (machine control panel)
Data exchange is organized by the basic PLC program.
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
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