Siemens SINUMERIK 840DE SL - 2 Detailed Description; 2.1 NC;PLC interface signals; 2.1.1 General

Various NC/PLC Interface Signals and Functions (A2)
Function Manual, 08/2005 Edition, 6FC5397-0BP10-0BA0
2-1
Detailed Description
2
2.1 2.1 NC/PLC interface signals
2.1.1 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
• MMC (operator component)
• MCP (Machine Control Panel)
Data exchange is organized by the basic PLC program.
Cyclical 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