11.03 3 Safety-Related Functions
3.10 Safe programable logic (SPL) (840D SW 4.4.18)
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
3-139
• Crosswise data comparison checks whether the "commissioning phase"
has been completed. If errors are detected in the crosswise data
comparison, a "STOP D/E" is triggered on the NCK/611 digital depending
on this criterion. If the commissioning phase has not been completed,
Alarm 27095 "SPL protection not activated" is displayed once after run-up
and the commissioning status between NCK and PLC cross checked.
• As far as the SPL-SGAs are concerned, if an error occurs for a crosswise
data comparison, then a system response is not issued. In this case, the
user must program his own response in the SPL.
Process
Machine
HW
in-
puts/
ouputs
HW
inputs/
out-
puts
NCK
signal
pro-
cessing
NCK
SGE/SGA
signals
Comparator
Data
PLC
signal
pro-
cessing
NC/PLC
interface:
Axis/
spindle DB
Comparator
Data
SPL033.DSF
System
Interface
Interface
NCK signal
processing
PLC signal
processing
NCK
I/Os
PLC
I/Os
Result and data
cross-check
Result and data
cross-check
Drive monitoring channel
NCK monitoring channel
Fig. 3-33 Communications between the NCK-611 digital PLC components
3.10.1 NCK-SPL program
The NCK-SPL program is written as an NC program (synchronous sub-routine)
with synchronized actions.
References: /FBSY/ Description of Functions, Synchronized Actions
The NCK-SPL program has the following features:
• The program can be started manually with NC START during
commissioning.
• The following applies once the program has been started:
− The synchronous actions assigned an ID No. are cyclically executed in
the IPO clock cycles (modal)
− The synchronous actions assigned the keyword IDS remain active even
after an operating mode change or NC-STOP/NC RESET
Description
Features
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