Special Functions; Auxiliary Function Outputs - Siemens SINUMERIK 840DE Programming Manual

Special functions

9.1

Auxiliary function outputs

Function
The auxiliary function output sends information to the PLC indicating when the NC program
needs the PLC to perform specific switching operations on the machine tool. The auxiliary
functions are output, together with their parameters, to the PLC interface. The values and
signals must be processed by the PLC user program.
Function outputs
The following functions can be downloaded to the programmable controller:
• Select tool T
• Tool compensation D,DL
• Feed F/FA
• Spindle speed S
• H functions
• M functions
For the above-mentioned functions it is possible to define whether they are to be transferred
during the machining sequence, and which reactions are to be activated.
For each function group or individual function, machine data define whether the output is
initiated
• Before the traversing movement,
• With the traversing movement, or
• After the traversing movement
.
The PLC can be programmed to acknowledge auxiliary function outputs in various ways.
Fundamentals
Programming Manual, 10.2004 Edition, 6FC5 298-7AB00-0BP1
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9-1