Overview Of The Safety-Related Functions - Siemens SINUMERIK 840D Description Of Functions

11.03

2.8 Overview of the safety-related functions

The safety-related functions are available in all modes and can communicate
with the process using safe input/output signals.
They can be implemented individually for each individual axis:
•
•
•
•
•
•
•
•
•
•
•
•
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
2 General Information about Integrated Safety Systems
Safe standstill
A monitoring function or sensor (e.g. light barrier) responds and brings a
moving drive to a standstill.
Safe operating stop (SBH)
Monitors the drives during standstill. The drives remain fully functional in
the position controlled mode.
Safe standstill (SH)
The drive pulses are cancelled. The energy feed is safely and
electronically disconnected.
Safely-reduced speed (SG)
Configured speed limits are monitored, e.g. when setting-up without using
an agreement button.
Safe software limit switches (SE)
Variable traversing range limits
Safe software cam (SN)
Range detection
Safe input/output signals (SGE/SGA)
Interface to the process
Safe programmable logic (SPL)
All of the safe signals and internal logic are directly connected.
Safe brake management (SBM)
Two-channel brake control and cyclic brake test
Safety-relevant communication via standard bus connection of distributed
I/Os for process and safety signals via PROFIBUS using the PROFIsafe
protocol
Safe software relay (SI relay)
Designed to implement an EMERGENCY STOP with safe programmable
logic and similar requirements.
Safe braking ramp (SBR)
Monitors the speed characteristic. The actual speed must be reduced after
stop request has been issued.

2.8 Overview of the safety-related functions

2-39