Definition Of An Auxiliary Function - Siemens SINUMERIK 828D Function Manual

H2: Auxiliary function outputs to PLC
8.1 Brief description
Type Function
M Special function
S Spindle function
T Tool number
User-specific auxiliary functions
User-specific auxiliary functions do not activate system functions. User-specific auxiliary functions are output to
the NC/PLC interface only. The functionality of the auxiliary functions must be implemented by the machine
manufacturer / user in the PLC user program.
Type Function
1) Auxiliary function
H
1)
Recommendation
8.1.2

Definition of an auxiliary function

An auxiliary function is defined by the following parameters:
• Type, address extension, and value
The 3 parameters are output to the NC/PLC interface.
• Output behavior
The auxiliary function-specific output behavior defines for how long an auxiliary function is output to the NC/
PLC interface and when it is output relative to the traversing motion programmed in the same parts program
block.
• Group assignment
An auxiliary function can be assigned to a particular auxiliary function group. The output behavior can be
defined separately for each auxiliary function group. This becomes active if no auxiliary function-specific
output behavior has been defined. Group membership also affects output of an auxiliary function after block
search.
References:
For more detailed information on auxiliary function output to the NC/PLC interface, see:
Function Manual, Basic Functions, Basic PLC Program (P3)
392
Example Meaning
M2=3 2nd spindle: Spindle right
S2=100 2nd spindle: Spindle speed = 100 (e.g. rpm)
T2=3
Example Meaning
H2=5 User-specific function
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
Basic Functions