Siemens Sinumerik 840D sl Function Manual page 538

Data Description
8.7 System variables
Bit 1 = 1:
$VA_XFAULTSI[X] (X = axis identifier)
Information about Safety Integrated Stop F for this axis
Bit 0 set:
Bit 1 set:
System variable $VA_STOPSI
Axis--specific system variable that contains the present stop. For a value of 4, a
Stop E is active for this axis.
System variable $A_STOPESI
Global system variable that with a value not equal to 0 indicates that a Stop E is
active for one particular axis.
System variable $VA_SAFE_TYPE
Information about the active safety operating mode of this axis:
= 0: No Safety Integrated motion monitoring active
= 1: Safety Integrated NCK--integrated motion monitoring active
= 2: Safety Integrated drive--integrated motion monitoring with SIC/SCC
coupling active
System variables $A_INSI[1...192]
The status signals of the NCK monitoring channel can be used in the NCK--SPL
using these system variables. Each of the system variables $A_INSI[1...192] can
be assigned any safety--related output signal or the AND logic operation of several
signals using axis--specific MD $MA_SAFE_xxx_OUTPUT. These system
variables can only be read by the user program.
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SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) - - 10.2015 Edition
In the crosswise data comparison between NCK and drive of any
axis, an error was detected and the delay time until Stop B is
initiated ($MA_SAFE_STOP_SWITCH_TIME_F) for this axis is
either running or has already expired.
Note: The bit is only set if a delay not equal to 0 is configured.
In the crosswise data comparison between NCK and drive an
actual value error was detected.
In the crosswise data comparison between NCK and drive -- an
error was detected and the delay time – up until a STOP B
($MA_SAFE_STOP_SWITCH_TIME_F) is initiated – is either
running or has expired.
Note: The bit is only set if a delay not equal to 0 is configured.
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