Siemens sinumerik 840d Programming Manual page 547

04.00
15
Identifier Type
$AC_FIFO1 REAL
$AC_FIFO2 REAL
... ...
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SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
Description: System variable/value range/index
$AC_FIFO1[n]
FIFO for motion-synchronized actions and cyclic measurements
n: Parameter number 0 – max. FIFO element
Special meaning:
n=0: On write accesses with index 0, a new value is stored in the
FIFO,
On read accesses with 0, the oldest element is read and deleted from
the FIFO
n=1: Read access to oldest element
n=2: Read access to latest element
n=3: Total of all elements in the FIFO if bit 0 is set in MD
$MC_MM_MODE_FIFO
n=4: Read access to current number of FIFO elements
n=5–m: Read access to individual FIFO elements
5 is the oldest element
6 is the second-oldest, etc.
$AC_FIFO2[n]
FIFO for motion-synchronized actions and cyclic measurements
n: Parameter number 0 – max. FIFO element
Special meaning:
n=0: On write accesses with index 0, a new value is stored in the
FIFO,
On read accesses with 0, the oldest element is read and deleted from
the FIFO
n=1: Read access to oldest element
n=2: Read access to latest element
n=3: Total of all elements in the FIFO if bit 0 is set in MD
$MC_MM_MODE_FIFO
n=4: Read access to current number of FIFO elements
n=5–m: Read access to individual FIFO elements
5 is the oldest element
6 is the second-oldest, etc.
...
15.2 List of system variables
Part pro
RS
RS
Tables
15
Sync O S
W R W + 4
W R W + 4
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