IEC 61508 Functional Safety for Industrial Applications

Functional Safety System Examples

The following figures show examples of the system configuration for motor control + network control + functional safety.

Figure 1. Use RX or RA MCU in Functional Safety Part

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Figure 2. Use RZ MPU in Functional Safety Part

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• Self-Test Software Kit
• SIL3 System Software Kit
• FSoE Application Software Kit & PROFIsafe Application Software Kit
• Reference Document
• Reference Hardware
• IEC 61508 Certified Compilers​

Solution Introduction

Self-Test Software Kit [RA/RX/RZ]

The Self-Test Software Kit provides a self-diagnostics software library for microcontroller, a complete safety manual, user guide and IEC61508 SIL3 Certificate test report certified by TÜV Rheinland Industrie Service GmbH (Germany). For safe system development, developers can select the information they require from the safety manual and make use of the self-diagnostics software library to alleviate the burden on microcontroller-level development to conform to functional safety.

The Self-Test Software Kit diagnoses the permanent failure of CPU, internal ROM, and internal RAM. Please refer to the reference document for permanent failure diagnosis of other modules and transient failure diagnosis.

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Test Timing

At start up, interval execution after start up

Running of Test Condition

All execution or division execution

Development Tool (C Compiler)

Renesas CC-RX compiler for functional safety

IAR Embedded Workbench^® for RX FS

IAR Embedded Workbench^® for Arm FS

Series		Compiler	Contents	Certificate
RX100 series*1		CC-RX compiler V2.03.00	Image IEC61508 Certified Software Self-diagnostics Software Library Safety Manual User Guide IEC61508 Certified Document	RX100*14 RX140*15
		IAR-EWRX compiler V3.10.5		RX100*14
RX200 series*2		CC-RX compiler V3.01.00		RXv2 Core, RXv3 Core
		IAR-EWRX compiler V4.14.2		RX200
RX600 series*3		CC-RX compiler V3.01.00		RXv2 Core, RXv3 Core*16
		IAR-EWRX compiler V4.14.2		RX600*17
RX700 series*4		CC-RX compiler V3.01.00		RXv2 Core, RXv3 Core
		IAR-EWRX compiler V4.14.2		RX700
Cortex-M85	RA8 series*5	IAR-EWARM FS V9.50.3		RA (CM85)
Cortex-M4	RA6 series*6 RA4 series*7	IAR-EWARM V8.22.3		RA (CM4)
Cortex-M33	RA6 series*8 RA4 series*9	IAR-EWARM FS V8.50.10*13 IAR-EWARM FS V9.20.3		RA (CM23, 33)
Cortex-M23	RA2 series*10
Cortex-R52	RZ/T series*11 RZ/N series*12	IAR-EWARM FS V9.20.3		RZ (CR52)

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SIL3 System Software Kit [RX/RZ]

The SIL3 System Software Kit provides Functional Safety Platform Software, a safety manual, user guide and IEC61508 SIL3 certificate and test report* certified by TÜV Rheinland Industrie Service GmbH (Germany).

It also includes a configuration tool for evaluating the behavior of Functional Safety Platform Software on a PC, and a software development handbook for easy development.

Key Features of the Functional Safety Platform Software in this package:

• Perform MCU/MPU self-diagnostics and cross monitoring, which vastly reduce the development time and burden when building redundant, dual safety MCU/MPU system.
• Execute user application software control.
• Software partitioning function between safety and non-safety application for simplified re-certification and enabling coexistence of safety software and non-safety software.
• Synchronous process possible on two MCUs//MPUs with multiple clock sources.

*Not included in the evaluation version of the SIL3 system software kit.

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Product	Compiler	Commercial Version*1	Contents		Certificate
RX72M RX72T RX72N RX71M RX671 RX660 RX66T RX66N RX651/RX65N RX64M RX24U RX24T RX230/RX231 RX23T RX23W RX23E-A	CC-RX compiler V3.01.00	RTK0EF0061F22002SJ *2	Image Commercial Version IEC61508 Certified Software Functional Safety Platform Software Safety Manual User Guide IEC61508 Certified Document Software Development Handbook Configuration Tool and Manual	Evaluation Version Functional Safety Platform Software Safety Manual User Guide Software Developer's Handbook Configuration Tool and Manual PC Tool for Information Output Application	RXv2 Core, RXv3 Core
	IAR-EWRX compiler V4.14.2	RTK0EF0062F22002SJ *2
RZ/T2M	IAR-EWARM FS V9.20.3	RTK0EF0103F21001SJ			RZ/T2M
RZ/T2M (Parallel Use)		RTK0EF0153F21001SJ			RZ/T2M (Parallel Use)
RZ/T2L RZ/N2L		RTK0EF0154F21001SJ			RZ/T2L, N2L

*1: Commercial version requires a license agreement. Please contact Sales to purchase.
*2: SIL3 System Software Kit provides different programs for each MCU/MPU product group. Please specify the MCU/MPU product group and obtain the SIL3 System Software Kit for that group.

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Safety Network Application Software Kits

Renesas offers safety network protocol solutions that can be used with the SIL3 System Software Kit.

*1: In order to use Renesas' Safety Network Protocol Solution, you must meet the following requirements:

1. You are a member of ETG.
2. You have purchased PROFIsafe driver from Siemens.

*2: Please refer to the Industrial Ethernet & Fieldbus page for EtherCAT/PROFINET slave devices.

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FSoE Application Software Kit

Group	Compiler	Commercial Version*1	Contents		Certificate
RX72M RX72T RX72N RX71M RX671 RX660 RX66T RX66N RX651/RX65N RX64M RX24U RX24T RX230/RX231 RX23T RX23W RX23E-A	CC-RX compiler V3.01.00	RTK0EF0080F21001SJ	Image Commercial Version FSoE Application Software Safety Manual User Guide IEC61508 Certified Document Sample Applications*2: Network Communication IC Interface Data I/O Interface Software Developer's Handbook	Evaluation Version FSoE Application Software Safety Manual User Guide Sample Applications*2: Network Communication IC Interface Data I/O Interface Software Developer's Handbook	RXv2 Core, RXv3 Core
	IAR-EWRX compiler V4.14.2	RTK0EF0081F21001SJ
RZ/T2M RZ/T2L RZ/N2L	IAR-EWARM FS V9.20.3	RTK0EF0129F21001SJ			CR52

Please make sure that you are member of ETG.
*1: Commercial version requires a license agreement. Please contact Sales to purchase.
*2: Two sample applications for checking the operation of the FSoE Application Software are bundled.

• Network Communication IC Interface: Application for data exchange between network communication IC and RX MCU
• Data I/O Interface: Application for input/output of safety data

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PROFIsafe Application Software Kit

Group	Compiler	Commercial Version*1	Contents		Certificate
RX72M RX72T RX72N RX71M RX671 RX660 RX66T RX66N RX651/RX65N RX64M RX24U RX24T RX230/RX231 RX23T RX23W RX23E-A	CC-RX compiler V3.01.00	RTK0EF0100F21001SJ	Image Commercial Version PROFIsafe Application Software Safety Manual User Guide IEC61508 Certified Document Sample Applications*2: Network Communication IC Interface Data I/O Interface Software Developer's Handbook Not bundled*3: PROFIsafe communication control driver	Evaluation Version PROFIsafe Application Software Safety Manual User Guide Sample Applications*2: Network Communication IC Interface Data I/O Interface Software Developer's Handbook Not bundled*3: PROFIsafe communication control driver	RXv2 Core, RXv3 Core
	IAR-EWRX compiler V4.14.2	RTK0EF0101F21001SJ
RZ/T2M*4 RZ/T2L RZ/N2L	IAR-EWARM FS V9.20.3	RTK0EF0172F21001SJ			CR52

Please note that you need to purchase PROFIsafe Driver from Siemens. Refer to *3.
*1: Commercial version requires a license agreement. Please contact Sales to purchase.
*2: Two sample applications for checking the operation of the PROFIsafe Application Software are bundled.

• Network Communication IC Interface: Application for data exchange between network communication IC and RX MCU
• Data I/O Interface: Application for input/output of safety data

*3: Please purchase and use the following software from SIEMENS.

• For RX: PROFIsafe Driver V2.2.2 for F-Slaves, which is included in PROFIsafe-Starterkit V3.5 with PROFIsafeprofile V2.6 MU1
• For RZ: PROFIsafe Driver V2.2.3 for F-Slaves, which is included in PROFIsafe-Starterkit V3.5.2 with PROFIsafeprofile V2.6 MU1

*4: Please use with Parallel Use SIL3 System Software Kit.

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Reference Document

The Reference Document is a set of documents that provides guidelines for making certification documents and design tips for functional safety systems.

1. How to write the document required to obtain the certification of the functional safety standard IEC61508.
2. The technical know-how necessary for the development of functional safety equipment.

Content is classified into five categories with various documents

1. Motor Control System Documents
2. Concept Phase Documents
3. Safety Validation Documents
4. MCU Internal Diagnosis Documents
5. MCU External Diagnosis Documents

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*1: This document explains the technical method for dealing with functional safety, therefore this document is not dependent on MCU nor compiler.
*2: Commercial version requires a license agreement. Please contact Sales to purchase.

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Reference Hardware [RX]

The Industrial Automation Functional Safety Reference Board is built based on Renesas' experience in safety system specifications and its implementation, and comes from detailed design, safety analysis, and diagnostics on a dual structure microcontroller system. By using this reference board as a template, the customer will be able to reduce system development time.

Since the terminals of each MCU are connected on both ends of the board, customers can extend the board specifications to match the product specifications.

• By connecting with a network communication board, the customer can build a development environment for software with safety network connectivity.
• When adding a motor drive controller board, the customer can build a software development environment for motor drive system with safety network connectivity.

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Board with Two RX72N MCUs

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Board with RX71M and RX651 MCUs

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Board with Two RX111 MCUs

IEC 61508 Certified Compilers

For constructing software in the functional safety system, it is necessary to prove that the compiler generates valid code. Renesas offers an IEC 61508 certified C compiler for functional safety.

TÜV-SUD certified IAR Embedded Workbench also available.

Product Name	Contents
C/C++ Compiler Package for RX Family	Image Compiler component: CC-RX compiler V2.03.00 and V3.01.00 IEC 61508 SIL3 certified
IEC 61508 Certification Kit for RX Compilers V3.01.00: RTCRX0000TC03ZNR V2.03.00: RTCRX0000TC02ZNR	IEC 61508 certificate issued by TÜV Rheinland for the C/C++ compiler for the RX family V2.03.00 and V3.01.00 Safety manual, etc.