Behavior After Power On/Mode Change/Reset - Siemens SINUMERIK 840D sl Function Manual

Connecting Sensors/Actuators
7.3 Safe programmable logic (SPL)
Table 7-7 Overview of system variables
Miscellaneous
$A_STATSID Crosswise data com-
parison error triggered if
the value is not equal to
0
$A_CMDSI 10x change timer value
for long forced checking
procedure 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 com-
parison stack level dis-
play: Number of signals
for which NCK and PLC
detect different signal
levels
$A_PLCSIIN Single–channel commu-
nication between NCK
and PLC SPL
$A_PLCSIOUT Single–channel commu-
nication between NCK
and PLC SPL
$AC_SAFE_SY Free safety synchroniz-
NA_MEM ing elements
Note:
r –> read, w –> write
7.3.10

Behavior after power on/mode change/reset

1. After the system has booted, the following Safety Integrated system variables
are assigned the value zero:
$A_INSE(D),
$A_OUTSE(D),
7-246
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
INT
Bits 0...27 cross-
wise data com-
parison error in
the I/O signals or
flag bits
Bit 28 crosswise
data comparison
error "SPL protec-
tion status"
Bit 29 timeout in
the communica-
tions 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 BOOL
timer was
started
0...320 INT
BOOL
BOOL
[0,MAX_INT]
© Siemens AG 2008 All Rights Reserved
05.08
r w r w
x x
x x x x
x x
x x
x x
x x x x
x x