Siemens SINUMERIK 840D sl Function Manual page 494

Brief description
1.1 Function
Userdefined auxiliary functions
There are two uses for user-defined auxiliary functions:
• Extension of predefined auxiliary functions
• User-specific auxiliary functions
Extension of predefined auxiliary functions
Extension of predefined auxiliary functions refers to the "address extensions" parameter. The
address extension defines the number of the spindle to which the auxiliary function applies.
The spindle function M3 (spindle right) is predefined for the master spindle of a channel. If a
2nd spindle is assigned to a channel, a corresponding user-defined auxiliary function must
be defined that extends the predefined auxiliary function.
Type
M
S
T
User-specific auxiliary functions
User-specific auxiliary functions do not activate system functions. User-specific auxiliary
functions are output by the NC to the NC/PLC interface only. The functionality of the auxiliary
functions must be implemented by the machine manufacturer / user via the PLC user
program.
Type
H
1)
1)
6
Function
Miscellaneous (i.e.
special) function
Spindle function
Tool number
Function
Auxiliary function
Recommendation
Example Meaning
M2=3 2. spindle: Spindle right
S2=100 2. spindle: Spindle speed = 100 e.g. rpm
T2=3
Example Meaning
H2=5 User-specific function
Basic logic functions: Auxiliary Function Output to PLC (H2)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0