Connecting Sensors/Actuators; Safety-Relevant Input/Output Signals; Overview Of The Sges/Sgas And Their Structure - Siemens SINUMERIK 840D sl Function Manual

Connecting Sensors/Actuators

7.1

Safety-relevant input/output signals

7.1.1

Overview of the SGEs/SGAs and their structure

Description
The safety-related input and output signals (SGEs and SGAs) are the interface of
the internal Safety Integrated functionality to the process.
SGE signals (safety-related input signals) control the active monitoring by de-se-
lecting or selecting the safety functions. This is realized, among other things, de-
pending on the status (switching status) of sensors and transmitters.
SGA signals (safety-related output signals) are feedback signals from safety func-
tions. They are, among other things, suitable for controlling actuators in a safety-
related fashion.
Processing I/O signals for the NC and drive through two channels
A two-channel structure is used to input/output and process safety-related input/
output signals (see Fig. 7-1 "NCK and drive monitoring channel"). All of the re-
quests and feedback signals for safety-related functions should be entered or re-
trieved through both monitoring channels (tw0-channel structure).
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
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