Siemens SINUMERIK 828D

H2: Auxiliary function outputs to PLC
8.3 Userdefined auxiliary functions
Basic Functions
Function Manual, 09/2011, 6FC5397-0BP40-2BA0
423
User-specific auxiliary functions
User-specific auxiliary functions have the following characteristics:
• User-specific auxiliary functions only activate user functions.
• No system functions can be activated by user-specific 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 Parameter assignment
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:
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.
Auxiliary function "spindle right" for the third spindle of the channel:
MD22010 $MC_AUXFU_ ASSIGN_TYPE[ m ] = "M"
MD22020 $MC_AUXFU_ASSIGN_EXTENSION[ m ] = 3
MD22030 $MC_AUXFU_ ASSIGN_VALUE[ m ] = 3
Predefined groups: 1 ... 4 10 ... 12 72 ... 168
User-defined groups: 5 ... 9 13 ... 71
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.