Siemens SINUMERIK 828D Function Manual page 32

Detailed description
2.3 System variables for synchronized actions
Total number of R parameters in the channel
The total number of R parameters in the channel can be set via the machine data:
MD28050 $MC_MM_NUM_R_PARAM = <maximum number>
The number of R parameters in the channel set in the machine data must be at least as
large as the number of R parameters required for the $AC_FIFO variables:
<Maximum number> ≥ MD28262 $MC_START_AC_FIFO + MD28260
Summation of all user data
The sum of the values of all user data is only provided via the index [4] when the function
has been activated via the machine data:
MD28266 MODE_AC_FIFO, bit 0 = <value>
Value
0
1
Storage location and reset behavior
The $AC_FIFO variables are based on the R parameters. The statements made there are
therefore also valid for the $AC_FIFO variables. See Section "R parameters ($R) (Page 26)".
32
$MC_NUM_AC_FIFO * (MD28264 $MC_LEN_AC_FIFO + 6)
Meaning
The sum of the values of all user data is not provided
The sum of the values of all user data is provided
Function Manual, 07/2012, 6FC5397-5BP40-3BA0
Synchronized actions