Siemens SINUMERIK 840D sl Function Manual page 218

Connecting Sensors/Actuators
7.3 Safe programmable logic (SPL)
Table 7-7 Overview of system variables
$A_OUTSED[n] NCK outputs
$A_OUTSEP[n] Image of a PLC output
$A_OUTSEPD[n Image of the PLC
]
outputs
SPL markers and timers
$A_MARKERSI[ Flag bits
n]
$A_MARKERSI Flag bits
D[n]
$A_MARKERSI Image of the PLC
P[n] markers
$A_MARKERSI Image of the PLC
PD[n] markers
$A_TIMERSI[n] Timers
$A_STATSID Crosswise data
comparison error
triggered if the value is
not equal to 0
$A_CMDSI 10x change timer val.
for long forced checking
proc. pulses and/or
single-channel test stop
logic
COMM_TO 0 –> 1 communications
timeout detected, PLC
will go to STOP in 5 s
$A_LEVELSID Crosswise data
comparison stack level
display: Number of
signals for which NCK
and PLC detect different
signal levels
7-218
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
n = 1, 2 INT
n = 1, 2, ... 64 BOOL
stand for the
No. of the
output
n = 1, 2 INT
n = 1, 2, ... 64 BOOL
st. for the No. of
the marker
n = 1, 2 INT
n = 1,2, ...64 BOOL
n = 1, 2 INT
n = 1, 2...16 REAL
stand for the
No. of the timer
INT
Bits 0...27
crosswise data
compar. err. in the
I/O sig. or flag bits
Bit 28 crosswise
data comparison
error "SPL
protection status"
Bit 29 time error
(watchdog) in the
communications
between NCK and
SPL
Bit 30, PLC
signals a stop to
the NCK
Bit 0 = 1 BOOL
10x time active
Bit5 of the 5 s ti- BOOL
mer was started
0...320 INT
© Siemens AG, 2006. All rights reserved
03.06
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