Overview, Si Functions - Siemens SINUMERIK 840D sl Function Manual

03.06
2.3

Overview, SI functions

The safety-related functions are available in all of the operating modes and can
communicate with the process via safety-related input/output signals. These can
be implemented individually for each axis.
S Safe stopping process
When a monitoring function or a sensor responds (e.g. a light grid), the drives
are safely controlled down to standstill, optimally adapted to the actual operat-
ing state of the machine.
S Safe braking ramp (SBR)
Monitors the speed characteristic. The speed must be reduced after a stop re-
quest has been issued.
S Safe standstill (SH)
The drive pulses are cancelled. The energy feed is safely and electronically dis-
connected.
S Safe operating stop (SBH)
Monitors the drives during standstill (to ensure that they remain stationary). The
drives remain fully functional in closed-loop control.
S Safely-reduced speed (SG)
Configured speed limits are monitored, e.g. when setting-up without using an
agreement button.
S Safety-relevant output "n<n
This is used to detect the velocity range of a drive in a safety-relevant fashion.
S Safe software limit switches (SE)
Variable traversing range limits
S Safe software cams (SN)
To detect ranges
S Safety-related input/output signals (SGE/SGA)
Interface to the process
S Safety-related communication via standard bus
Distributed I/Os for process and safety signals are connected via PROFIBUS
using the PROFIsafe profile.
S Safe programmable logic (SPL)
All of the safe signals and internal logic are directly connected.
S Safe brake management (SBM)
Safety-relevant two-channel brake control (SBC) and cyclic brake test (SBT).
S Integrated acceptance test
Partially automated acceptance test for all safety-related functions. Simple op-
eration of the test process, automatic configuration of Trace functions and auto-
matic generation of an acceptance report.
© Siemens AG, 2006. All rights reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 03.2006 Edition
2.3 Overview, SI functions
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Brief Description
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