EN 61131-6:2012

FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Conformance to this standard
5 FS-PLC safety lifecycle
6 FS-PLC design requirements specification
7 FS-PLC design, development and validation plan
8 FS-PLC architecture
9 HW design, development and validation planning
10 FS-PLC SW design and development
11 FS-PLC safety validation
12 FS-PLC type tests
13 FS-PLC verification
14 Functional safety assessment
15 FS-PLC operation, maintenance and modification
   procedures
16 Information to be provided by the FS-PLC
   manufacturer for the user
Annex A (informative) - Reliability calculations
Annex B (informative) - Typical FS-PLC Architectures
Annex C (informative) - Energise to trip applications
        of FS-PLC
Annex D (informative) - Available failure rate databases
Annex E (informative) - Methodology for the estimation
        of common cause failure rates in a multiple channel
        FS-PLC
Bibliography
Annex ZA (normative) - Normative references to
         international publications with their
         corresponding European publications

IEC 61131-6:2012 specifies requirements for programmable controllers (PLCs) and their associated peripherals, as defined in Part 1, which are intended to be used as the logic subsystem of an electrical/electronic/programmable electronic (E/E/PE) safety-related system. A programmable controller and its associated peripherals complying with the requirements of this part is considered suitable for use in an E/E/PE safety-related system and is identified as a functional safety programmable logic controller (FS-PLC). An FS-PLC is generally a hardware (HW) / software (SW) subsystem. An FS-PLC may also include software elements, for example predefined function blocks.