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

03.06
Table 7-7 Overview of system variables
$A_PLCSIIN Single-channel
communication between
NCK and PLC SPL
$A_PLCSIOUT Single-channel
communication between
NCK and PLC SPL
Note:
r –> read, w –> write
7.3.9

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),
$A_OUTSI(D),
$A_MARKERSI(D),
$A_INSEP(D),
$A_OUTSEP(D),
$A_OUTSIP(D),
$A_MARKERSIP(D)
$A_INSI(D).
2. Pre-assignment 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:
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.
7.3.10

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.
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
IDS=<No.> WHEN TRUE DO<Boot instructions>
Connecting Sensors/Actuators
7.3 Safe programmable logic (SPL)
l s
BOOL x
BOOL x x
l s
x
x x
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