Siemens SINUMERIK 840D sl Function Manual page 400

H2: Auxiliary function outputs to PLC
8.2 Predefined auxiliary functions
Type
The identifier of an auxiliary function is defined via the "type," e.g.:
"M"
"S"
"F"
The setting is made via the following machine data:
MD22050 $MC_AUXFU_PREDEF_TYPE[<n>] (type of predefined auxiliary functions)
Note
The "type" cannot be changed for predefined auxiliary functions.
Address extension
The "address extension" of an auxiliary function is for addressing different components of the
same type. In the case of predefined auxiliary functions, the value of the "address extension"
is the spindle number to which the auxiliary function applies.
The setting is made via the following machine data:
MD22060 $MC_AUXFU_PREDEF_EXTENSION[<n>] (address extension for predefined
auxiliary functions)
Grouping together auxiliary functions
To assign an auxiliary function for all spindles of a channel to the same auxiliary function group,
the value "-1" is entered for the "address extension" parameter.
Example:
The auxiliary function M3 (machine data index = 6) is assigned to the second auxiliary function
group for all the channel's spindles.
MD22040 $MC_AUXFU_PREDEF_GROUP[ 6 ]
MD22050 $MC_AUXFU_PREDEF_TYPE[ 6 ]
MD22060 $MC_AUXFU_PREDEF_EXTENSION[ 6 ] = -1
MD22070 $MC_AUXFU_PREDEF_VALUE[ 6 ]
Value
The parameters "value" and "type" define the meaning of an auxiliary function, i.e. the system
function that is activated on the basis of this auxiliary function.
The "value" of an auxiliary function is defined in the machine data:
400
For additional function
For spindle function
For feed
= 2
= "M"
= 3
Function Manual, 01/2015, 6FC5397-0BP40-5BA2
Basic Functions