11.03 1 Short Description
© Siemens AG 2003 All Rights Reserved
SINUMERIK 840D/SIMODRIVE 611 digital SINUMERIK Safety Integrated (FBSI) - Edition 11.03
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1 Short Description
SINUMERIK Safety Integrated
®
provides safety functions that have been
certified in an EC type examination. These functions can be used to implement
practical and highly effective protective measures for operating personnel and
machinery. With the exception of the brake test (control Category 2, refer to
Chapter 8.3 "Function test of the mechanical braking system"), all of the safety
functions fulfill the requirements of control Category 3 according to EN 954-1
and are a fixed component of the basic system. No additional sensors or
evaluation units are needed. This means less installation time and costs at the
machine and a more transparent electrical cabinet.
Included in the scope of functions are:
• Functions for safe monitoring of speed, zero speed and position and
• Functions for safe logical combination of signals.
It is now possible to connect sensors and actuators, for example EMERGENCY
STOP buttons, light barriers, valves and brakes, directly to the two-channel
I/Os. Logic operations and responses are performed internally using safety-
related technology.
Fully-digital systems now make it possible to implement safety-relayed
technology in which electronics and software play the major role. Full
integration into the control and drive technology means that the safety functions
are now an inseparable part of the basic system. They provide a previously
unknown, intelligent and direct link right through the system to the electric
drives and measuring system. Reliable operation, fast response and wide
acceptance mean that this certified safety concept is extremely effective.
A two-channel, diverse system structure has been formed on the basis of the
existing multi-processor structure. The safety functions have been configured
redundantly in the NC, drive and internal PLC.
The process variables and safety-relevant system data are subject to crosswise
data monitoring. Safety-relevant software and hardware functions are checked
by an automatic forced checking procedure at defined intervals.
The special feature of this safety concept: Using SINUMERIK Safety
Integrated
®
, with only one measuring system – the standard motor measuring
system – control Category 3 according to EN 954-1 (SIL2) (IEC 61508) can be
implemented. A second sensor is not necessary but can be added as an
additional, direct measuring system (e.g. linear scale).
1
Direct connection
of two-channel
I/O signals
Highly effective safety
concept
Redundant
configuration of the
safety function
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