IEC 61784-3-1:2010 PDF

Industrial communication networks - Profiles - Part 3-1: Functional safety fieldbuses - Additional specifications for CPF 1

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Title (English):

IEC 61784-3-1:2010

Industrial communication networks - Profiles - Part 3-1: Functional safety fieldbuses - Additional specifications for CPF 1

Document status:: Active
Format:: Electronic (PDF)
Number of pages:: 67
Publication date:: June 29, 2010
Edition:: IEC IS 61784 edition 2 version 1
ICS:: 25.040.40

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Description (English):

IEC 61784-3-1:2010 specifies a safety communication layer (services and protocol) based on CPF 1 of IEC 61784-1 and IEC 61158 Types 1 and 9. It identifies the principles for functional safety communications defined in IEC 61784-3 that are relevant for this safety communication layer. This second edition cancels and replaces the first edition published in 2007. This edition constitutes a technical revision. The main changes with respect to the previous edition are: - updates in relation with changes in IEC 61784-3; - adjustment of Figure 5; - change of sequence number from two octets to four octets in 7.2.2 to match the final protocol from the consortium; - addition of details for time synchronization in 7.2.4; - addition of information for safety response time in 9.3; - addition of information in constraints for calculation of system characteristics in 9.5.

Technical details

Technical committee: SC 65C - Industrial networks
SKU: IEC 61784-3-1:2010

Abstract

Overview

IEC 61784-3-1:2010 - Industrial communication networks - Profiles - Part 3-1: Functional safety fieldbuses - Additional specifications for CPF 1 - defines a safety communication layer (services and protocol) based on CPF 1 from IEC 61784‑1 and IEC 61158 Types 1 and 9. Edition 2.0 (2010) is a technical revision of the 2007 edition and specifies principles, message formats and runtime constraints for safety-related communication over FOUNDATION Fieldbus™ SIS (FSCP 1/1) and other CPF 1 implementations.

Key technical topics and requirements

Safety communication layer: Defines the services, protocol elements and PDU formats used to carry safety data over a “black channel” transport.
Black channel principles: Mechanisms to treat the underlying network as untrusted and to provide end‑to‑end safety (sequence numbers, CRCs, connection keys).
Protocol elements:
- Safety PDU format and CRC for integrity (see Clause 7.1).
- Sequence number handling - changed in this edition from 2 octets to 4 octets (Clause 7.2.2) to align with final consortium protocol.
- Time synchronization details and monitoring added (Clause 7.2.4).
- Virtual header, connection key and cross‑check techniques for redundancy.
Safety measures and constraints: Time stamps, time expectation, connection authentication, redundancy with cross‑checking, and guidance for residual error rate and SIL determination (Clause 5, Clause 9).
System requirements: Safety function response time, device start‑up, message rates, and constraints for calculation of system characteristics (Clause 9; additions in 9.3 and 9.5 in this edition).
Profiles and device architecture: FSCP 1/1 profile specifics, function block models, object dictionaries and configuration levels (Clauses 4–6).
Assessment and conformance: Information to support safety assessment and manufacturer documentation requirements (Clause 10, Annex B).

Practical applications and users

Where used: Process industries (oil & gas, chemical, power, pharmaceuticals), distributed safety instrumented systems (SIS), emergency shutdown and safety interlocks that require reliable, certified safety communication over fieldbus networks.
Who uses this standard:
- Safety and control system engineers designing SIL-rated architectures.
- Device manufacturers implementing CPF 1 / FSCP 1/1 safety stacks.
- System integrators and OEMs responsible for configuration, testing and certification.
- Functional safety assessors and certification bodies evaluating compliance and residual error calculations.

Related standards

IEC 61784-1 - Profiles and CPF definitions (foundation for CPF 1).
IEC 61784-3 - Functional safety communication profiles (concepts and principles).
IEC 61158 - Fieldbus protocols (Types 1 and 9 referenced).
ISO/OSI reference model (mapping of safety layers to FAL/DLL/PhL).

For implementation or certification tasks, consult the full IEC 61784‑3‑1:2010 document and referenced standards for normative details, message formats and assessment guidance.

Related standards

Standards mentioned in the description

Abstract

Overview

Key technical topics and requirements

Safety communication layer: Defines the services, protocol elements and PDU formats used to carry safety data over a “black channel” transport.
Black channel principles: Mechanisms to treat the underlying network as untrusted and to provide end‑to‑end safety (sequence numbers, CRCs, connection keys).
Protocol elements:
- Safety PDU format and CRC for integrity (see Clause 7.1).
- Sequence number handling - changed in this edition from 2 octets to 4 octets (Clause 7.2.2) to align with final consortium protocol.
- Time synchronization details and monitoring added (Clause 7.2.4).
- Virtual header, connection key and cross‑check techniques for redundancy.
Safety measures and constraints: Time stamps, time expectation, connection authentication, redundancy with cross‑checking, and guidance for residual error rate and SIL determination (Clause 5, Clause 9).
System requirements: Safety function response time, device start‑up, message rates, and constraints for calculation of system characteristics (Clause 9; additions in 9.3 and 9.5 in this edition).
Profiles and device architecture: FSCP 1/1 profile specifics, function block models, object dictionaries and configuration levels (Clauses 4–6).
Assessment and conformance: Information to support safety assessment and manufacturer documentation requirements (Clause 10, Annex B).

Practical applications and users

Where used: Process industries (oil & gas, chemical, power, pharmaceuticals), distributed safety instrumented systems (SIS), emergency shutdown and safety interlocks that require reliable, certified safety communication over fieldbus networks.
Who uses this standard:
- Safety and control system engineers designing SIL-rated architectures.
- Device manufacturers implementing CPF 1 / FSCP 1/1 safety stacks.
- System integrators and OEMs responsible for configuration, testing and certification.
- Functional safety assessors and certification bodies evaluating compliance and residual error calculations.

Related standards

IEC 61784-1 - Profiles and CPF definitions (foundation for CPF 1).
IEC 61784-3 - Functional safety communication profiles (concepts and principles).
IEC 61158 - Fieldbus protocols (Types 1 and 9 referenced).
ISO/OSI reference model (mapping of safety layers to FAL/DLL/PhL).

For implementation or certification tasks, consult the full IEC 61784‑3‑1:2010 document and referenced standards for normative details, message formats and assessment guidance.

IEC 61784-3-1:2010 PDF

Technical details

Abstract

Overview

Key technical topics and requirements

Practical applications and users

Related standards

Related standards

Abstract

Overview

Key technical topics and requirements

Practical applications and users

Related standards

Related standards

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