Siemens SINUMERIK 808D ADVANCED Parameter Manual page 203

28260 NUM_AC_FIFO
- Number of FIFO variable for synchronized actions
-
- -
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:
n=2:
n=3:
n=4:
n=5:
n=6:
28262 START_AC_FIFO
- FIFO variables store from R variable
-
- -
Description:
Number of the R variable as from which FIFO variables are 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 reading with index 0.
n=1:
n=2:
n=3:
n=4:
Parameter Manual
Parameter Manual, 08/2015, 6FC5397-8EP40-0BA1
0, 0, 0, 0, 0, 0, 0, 0...
Access to the first element read in
Access to the last element 1 read in
Sum of all FIFO elements
Number of elements available in the FIFO
Current write index relative to FIFO start
1st element read in
0, 0, 0, 0, 0, 0, 0, 0...
Access to the first element read in
Access to the last element read in
Sum of all FIFO elements
Number of elements available in the FIFO
3.3 Channel-specific machine data
C01
DWORD
0 10
C01
DWORD
0 32535
Machine data
2.3, 2.4, 6.1
PowerOn
1/1 M
2.3, 2.4, 6.1
PowerOn
1/1 M
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