Machine data
2.3 Channel-specific machine data
Parameter Manual
186
Operating Instructions, 08/2013, 6FC5397-8EP40-0BA0
Description:
Number of FIFO variables $AC_FIFO1 - $AC_FIFO10 for motion-synchronous
actions.
FIFO variables are used for product tracking. A piece of information (e.g.
the product length) for each part on a conveyor belt can be temporarily
stored in each FIFO variable.
FIFO variables are stored in R variables.
MD28262 $MC_START_AC_FIFO defines the number of the R variable as from which
the FIFO variables can be stored. All R variables with lower numbers can be
used freely in the part program.
R variables above the FIFO range cannot be written from the part program.
The number of R variables must set via MD28050 $MC_MM_NUM_R_PARAM so that all
FIFI variables can be accommodated from the start of the R variables:
MD28050 $MC_MM_NUM_R_PARAM = MD28262 $MC_START_AC_FIFO + MD28260
$MC_NUM_AC_FIFO * (MD28264 $MC_LEN_AC_FIFO + 6)
The FIFO variables bear the names $AC_FIFO1 to $AC_FIFOn.
They are stored as arrays.
The indices 0 - 5 have special meanings:
n= 0:
A new value is stored in the FIFO when writing with index 0.
The oldest element is read and removed from the FIFO when writing with index
0.
n=1: Access to the first element read in
n=2: Access to the last element 1 read in
n=3: Sum of all FIFO elements
n=4: Number of elements available in the FIFO
n=5: Current write index relative to FIFO start
n=6: 1st element read in
28260 NUM_AC_FIFO C01 2.3,2.4,6.1
- Number of FIFO variable for synchronized actions DWORD PowerOn
-
- - 0, 0, 0, 0, 0, 0, 0, 0... 0 10 1/1
To Next Page
Loading...
