Siemens SINUMERIK 828D Function Manual page 463

H2: Auxiliary function outputs to PLC
8.15 Information options
Example
All M-auxiliary functions of the 1st group will be stored in the order they are output
id=1 every $AC_AUXFU_M_STATE[0]==2 do $AC_FIFO[0,0]=$AC_AUXFU_M_VALUE[0]
References
For more information on the system variables, refer to:
List Manual, system variables
Basic Functions
463
Function Manual, 09/2011, 6FC5397-0BP40-2BA0