Siemens SINUMERIK 808D Parameter Manual page 215

Description:
$AC_PARAM[] is stored in SRAM.
28256 MM_NUM_AC_MARKER
- Dimension of $AC_MARKER
-
- -
Description:
Number of channel-specific markers $AC_MARKER for motion-synchronous actions.
DRAM or SRAM is required depending on MD28257 $MC_MM_BUFFERED_AC_MARKER.
28257 MM_BUFFERED_AC_MARKER
- $AC_MARKER[] is stored in SRAM.
-
- -
Description:
$AC_MARKER[] is stored in SRAM.
28258 MM_NUM_AC_TIMER
- Number of time variables $AC_TIMER (DRAM)
-
- -
Description:
Number of channel-specific time variables $AC_TIMER for motion-synchronous actions
(DRAM)
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:
Parameter Manual
List Manual, 01/2017
8, 8, 8, 8, 8, 8, 8, 8...
0, 0, 0, 0, 0, 0, 0, 0...
0, 0, 0, 0, 0, 0, 0, 0...
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
3.3 Channel-specific machine data
C02
DWORD
0 20000
C02
DWORD
0 1
C02
DWORD
0 10000
C01
DWORD
0 10
Machine data
2.3, 6.1
PowerOn
1/1 M
2.3, 6.1
PowerOn
1/1 M
2.3, 2.4, 6.1
PowerOn
1/1 M
2.3, 2.4, 6.1
PowerOn
1/1 M
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