En 62061 - Siemens SINUMERIK 840D sl Function Manual
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- Function manual (2184 pages) ,
- Programming manual (1334 pages) ,
- Commissioning manual (1102 pages)
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05.08
EN ISO 13849–1 is based on the known categories of EN 954–1. It now takes into
consideration complete safety functions with all of the devices involved in their exe-
cution. With EN ISO 13849–1, safety functions are investigated from a quantitative
perspective going beyond the qualitative basis of EN 954–1. Performance levels
(PL) are used, for this purpose, based on the various Categories. The following
safety–related characteristic quantities are required for devices/equipment:
S Category (structural requirement)
S PL: Performance Level
S MTTF
d
S DC: Diagnostics Coverage
S CCF: Common Cause Fault
The Standard describes the calculation of the Performance Level (PL) for safety–
related parts of controls on the basis of designated architectures. For deviations
from this, EN ISO 13849–1 refers to EN 61508.
When combining several safety–related parts to form a complete system, the Stan-
dard explains how to determine the resulting PL.
Note
Since May 2007, EN ISO 13849–1 has been harmonized under the Machinery
Directive. EN 954–1 can still be applied up to Nov. 30, 2009.
1.2.5
EN 62061
EN 62061 (this is identical to IEC 62061) is a sector–specific standard below EN
61508. It describes the implementation of safety–related electrical control systems
of machines and takes into account the complete lifecycle – from the conceptual
phase to de–commissioning. Safety functions are considered from both quantita-
tive and qualitative standpoints as basis.
In so doing, the Standard consequentially applies a top–down technique in imple-
menting complex control systems – known as functional decomposition. Starting
from the safety functions resulting from the risk analysis, a subdivision is made into
sub–safety functions and these sub–safety functions are then assigned to real de-
vices/equipment, subsystems and subsystem elements. Both the hardware as well
as the software is taken into consideration. EN 62061 also describes the require-
ments placed on implementing application programs.
© Siemens AG 2008 All Rights Reserved
SINUMERIK 840D sl/SINAMICS S120 SINUMERIK Safety Integrated (FBSI sl) – 05.2008 Edition
: Meantime time up to a dangerous failure
Regulations and Standards
1.2 Safety of machinery in Europe
1-23
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