Siemens SINUMERIK 840D sl Function Manual page 184

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Table of Contents

Connecting Sensors/Actuators

7.1 Safety–related input/output signals

S SGE and SGA signals are processed through two channels

S Processed in the NCK monitoring channel

S Processed in the drive monitoring channel

S Safety functions are selected/deselected independent of the NC mode

S Differences in the active SGE/SGA in the monitoring channels are detected in

the crosswise data/result comparison

The access to SGE/SGA signals is described in Chapter 7.2 "Connecting I/O via

PROFIsafe" and Chapter 7.3 "Safe programmable logic (SPL)".

The state of a deleted SGE/SGA (logical "0") that can be achieved both by the

user as well as also using fault responses of the "SINUMERIK Safety Integrated"

system, are defined as so–called "fail–safe state" of an SGE/SGA. This is the

reason that the system is only suitable for applications where this state

corresponds to the fail–safe state of the process controlled by "SINUMERIK

Safety Integrated".

SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition

Sinamics s120