Definition Of An Auxiliary Function; Overview Of The Auxiliary Functions - Siemens SINUMERIK 840D sl Function Manual

H2: Auxiliary function outputs to PLC
8.1 Brief description
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 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
H
1)
Recommendation
1)
8.1.2

Definition of an auxiliary function

An auxiliary function is defined by the following parameters:
● Type, address extension and value
The three 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 part 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.
For more detailed information on auxiliary function output to the NC/PLC interface, see Section
"P3: Basic PLC program for SINUMERIK 840D sl (Page 821)".
8.1.3

Overview of the auxiliary functions

M functions
M (special function)
Address extension
Range of values Meaning
0 (implicit) - - -
378
Function
Additional function
Spindle function
Tool number
Function
Auxiliary function
Value
Range of values
0 ... 99
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
Type
INT
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Meaning Number
Function 5
Basic Functions
8)