Overview: Predefined Auxiliary Functions - Siemens SINUMERIK 840D sl Function Manual
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Definition of a predefined auxiliary function
The parameters of the predefined auxiliary function are stored in machine data and can be
changed in some cases. All machine data, which are assigned to an auxiliary function, have
the same index <n>.
● MD22040 $MC_AUXFU_PREDEF_GROUP[<n>] (group assignment of predefined
auxiliary functions)
● MD22050 $MC_AUXFU_PREDEF_TYPE[<n>] (type of predefined auxiliary functions)
● MD22060 $MC_AUXFU_PREDEF_EXTENSION[<n>] (address extension for predefined
auxiliary functions)
● MD22070 $MC_AUXFU_PREDEF_VALUE[<n>] (value of predefined auxiliary functions)
● MD22080 $MC_AUXFU_PREDEF_SPEC[<n>] (output behavior of predefined auxiliary
functions)
8.2.1
Overview: Predefined auxiliary functions
Significance of the parameters listed in the following tables:
Parameter
Index <n>
Type
Address extension
Value
Group
Predefined auxiliary functions
General auxiliary functions, Part 1
System function
Stop
Conditional stop
End of subprogram
Tool change
Spindle-specific auxiliary functions, spindle 1
System function
Spindle right
Spindle left
Basic Functions
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Meaning
Machine data index of the parameters of an auxiliary function
MD22050 $MC_AUXFU_PREDEF_TYPE[<n>]
MD22060 $MC_AUXFU_PREDEF_EXTENSION[<n>]
MD22070 $MC_AUXFU_PREDEF_VALUE[<n>]
MD22040 $MC_AUXFU_PREDEF_GROUP[<n>]
Index <n>
Type
0
1
2
3
4
5
Index <n>
Type
6
7
H2: Auxiliary function outputs to PLC
8.2 Predefined auxiliary functions
Address ex‐
tension
M
0
M
0
M
0
M
0
M
0
M
(0)
Address ex‐
tension
M
1
M
1
Value
Group
0
1
1
1
2
1
17
1
30
1
6
(1)
1)
Value
Group
3
(2)
4
(2)
385
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