Behavior After Power On/Mode Change/Reset; Spl Data On The Plc Side - Siemens SINUMERIK 840D sl Function Manual

Connecting sensors and actuators
8.5 Safe programmable logic
8.5.10

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), not for F_DP communication,
$A_OUTSE(D),
$A_OUTSI(D),
$A_MARKERSI(D),
,$A_INSEP(D), not for F_DP communication,
$A_OUTSEP(D),
$A_OUTSIP(D),
$A_MARKERSIP(D),
$A_INSI(D).
2. Preassignment of other variables before cyclic processing of the NCK-SPL starts can be
programmed in the same part program as the NCK-SPL itself. To ensure that the pre-
assignment instructions are only performed once, they must use the following syntax:
IDS=<nr> WHEN TRUE DO<boot instructions>
As a result of the identifier IDS, the events "operating mode change" and "reset" have no
effect on the processing of the NCK-SPL.
3. Several boot instructions can be programmed in one block.
4. For the relevant FDP system variables, see Chapter "Boot behavior of the F_DP
communication (Page 246)" - and the following.
8.5.11

SPL data on the PLC side

The safe programmable logic of the PLC (PLC-SPL) is a sub-function of the safety functions
integrated in the SINUMERIK.
Signals
The PLC-SPL signals are in DB18 and are sub-divided into
1. Parameterization part, and
2. Data area/status
Parameterization part
SPL_READY:
The SPL_READY = TRUE signal indicates that the commissioning phase has been completed,
i.e. if a CDC error has occurred, the basic program sends a "STOP D/E" to all the axes.
STOP_MODE:
For crosswise comparison error:
0 = external STOP D
1 = external STOP E
to the drive
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Function Manual, 12/2017, 6FC5397-4BP40-6BA1
Safety Integrated