SIEMENS
SINAMICS G150 NEMA
Engineering information
4
Siemens D11.7
(Part 1) – 2013
Safety integrated
Safety integrated
G_D211_XX_00208
SLS
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G_D211_XX_00209
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Safely-Limited Speed (SLS, with encoders)
Function description
Using the Safely-Limited Speed function, the drive is
monitored against a parameterizable maximum velocity.
Four different limit values can be activated. Just the same as
for SOS, the speed setpoint is not independently influenced.
After SLS has been selected, the higher-level control must
bring the drive to below the selected velocity limit within a
parameterizable time
t
.
Application, customer benefits
When setting-up many machines operating personnel
must work on the machine as it rotates. This must either be
done in steps, because the dangerous area must always be
exited at each start, or alternatively, the operator works at
the machine while it moves and is therefore exposed to an
increased risk. When using the SLS function, a considerable
amount of time can be saved – and it is still guaranteed
that the operating personnel are safe. For this purpose,
the drive velocity can be safely limited to a safe low level.
The selectable wait time until SLS is activated allows the
drive control to run-down the coordinated axes in a
controlled fashion.
Safe Speed Monitor (SSM, with encoders)
Function description
The Safe Speed Monitor function supplies a safety feedback
signal (high active) if the drive falls below a selectable
velocity limit value. Contrary to the functions described
above, there is no drive-based fault response when the limit
value is exceeded.
Application, customer benefits
The safety SSM feedback signal can be used in a higher-
level control for safety-relevant responses. The higher-level
safety control can flexibly respond to the signal, depending
on the particular situation, as there is no drive-based
response when the limit value is exceeded. For example,
using the SSM signal, a protective door can be released after
a non-hazardous velocity is reached.
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Safe Direction (SDI, with encoders)
Function description
The SDI function ensures that the drive can only rotate in
the selected direction.
Deviation from the direction of rotation currently being
monitored is detected reliably and the configured drive-
integrated fault reaction is initiated. It is possible to select
which direction of rotation is to be monitored.
Application, customer benefits
The SDI function is used when the drive may only move in
one direction. A typical application is to permit the operator
access to a danger zone, as long as the machine is rotating
in the safe direction, i.e. away from the operator. In this
state, the operator can feed material into the work zone/
remove material from the work zone without danger.
The function saves the use of external components e.g.
speed monitors and the associated wiring. The release of a
danger zone, while the machine is moving away from the
operator, increases productivity. Without the SDI function,
the machine must be safely stopped during material loading
and removal.
PROFIsafe
PROFIsafe is an open communication standard, that facilitates
standard and safety-relevant communication along one
communication path (hard-wired or wireless). As a
consequence, a second, separate bus system is not required.
The telegrams that are sent are continually monitored to
ensure safety-relevant communication. Possible errors such
as telegrams that have been lost, repeated or received in
the incorrect sequence etc. are avoided. This is done by
consecutively numbering the telegrams in a safety-rele-
vant fashion, monitoring their reception within a defined
time and transferring an ID for transmitter and receiver of
a telegram. Further, a cyclic redundancy check CRC (cyclic
redundancy check) is performed.
SINAMICS G150 supports the PROFIsafe profile, based on
PROFIBUS as well as on PROFINET.
Licensing
The Safety Integrated Basic Functions do not require a license.
A license is, however, required for Safety Integrated Extended
Functions. It is irrelevant which safety functions are used
and how many.
The license required for SINAMICS G150 can be ordered,
with safety option
K01
.
G_PM21_XX_00116
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SDI