15
Tables 04.00
15.2 List of s
stem variables
15
ï›™
Siemens AG 2000. All rights reserved
15-548
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide Advanced (PGA) – 04.00 Edition
Identifier Type Description: System variable/value range/index Part pro Sync O S
...
... ...
$AC_FIFO10
REAL $AC_FIFO10[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.
RS W R W + 4
15.2.26 I/Os
$A_IN
BOOL $A_IN[n]
Digital input NC
n: Number of input 1 – ...
The max. input number is determined by MD
$MN_FASTIO_DIG_NUM_INPUTS
RS R 2
$A_OUT
BOOL $A_OUT[n]
Digital output NC
n: Number of output 1 – ...
The max. input number is determined by MD
$MN_FASTIO_DIG_NUM_OUTPUTS
RS W R W 2
$A_INA
REAL $A_INA[n]
Analog input NC
n: Number of input 1 – ...
The max. input number is determined by MD
$MN_FASTIO_ANA_NUM_INPUTS
RS R 2
$A_OUTA
REAL $A_OUTA[n]
Analog output NC
When writing, the value does not become active until the next IPO
cycle at which point it is read back.
n: Number of output 1 – ...
The max. input number is determined by MD
$MN_FASTIO_ANA_NUM_OUTPUTS
RS W R W 2
$A_INCO
BOOL $A_INCO[n]
Comparator input
n: Number of output 1 – ...
The max. input number is determined by MD
RS R 2
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