Parameterization; Maximum Number Of User-Defined Auxiliary Functions; Group Assignment; Type, Address Extension And Value - Siemens SINUMERIK 840D sl Function Manual

H2: Auxiliary function outputs to PLC
8.3 Userdefined auxiliary functions
● A user-specific auxiliary function is output to the PLC according to the parameterized output
behavior.
● The functionality of a user-specific auxiliary function is implemented by the machine
manufacturer/user in the PLC user program.
8.3.1

Parameterization

8.3.1.1

Maximum number of user-defined auxiliary functions

The maximum number of user-defined auxiliary function per channel can be parameterized
via the machine data:
MD11100 $MN_AUXFU_MAXNUM_GROUP_ASSIGN (maximum number of user-defined
auxiliary functions)
8.3.1.2

Group assignment

The handling of the auxiliary functions for a block search is defined using the group assignment
of an auxiliary function. The 168 auxiliary function groups available are subdivided into
predefined and user-definable groups:
Predefined groups:
User-defined groups:
Every user-defined auxiliary function is assigned as standard to the 1st auxiliary function group.
The assignment can be changed using the following machine data:
MD22000 $MC_AUXFU_ASSIGN_GROUP[<n>] (group assignment of user-defined auxiliary
functions)
If an auxiliary function is not assigned to any group, then a value of "0" should be entered into
the machine data.
Note
1. Auxiliary function group and block search
Auxiliary functions of the 1st auxiliary function group are, for a block search, only collected,
but not output.
8.3.1.3

Type, address extension and value

An auxiliary function is programmed via the type, address extension and value parameters
(see Section "Programming an auxiliary function (Page 412)").
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Basic Functions