Siemens SINUMERIK 840D sl Function Manual page 13

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Detailed description

NC/PLC interface signals

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

• HMI (operator components)

• MCP (Machine Control Panel)

Data exchange is organized by the basic PLC program.

Cyclic signal exchange

The following interface signals are transferred cyclically, i.e. in the clock grid of the OB1, by

the basic PLC program:

• NC and operator-panel-front-specific signals

• Mode groupspecific signals

• Channelspecific signals

• Axis/spindlespecific signals

Basic logic functions: Various NC/PLC interface signals and functions (A2)

Function Manual, 11/2006, 6FC5397-0BP10-2BA0

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