AS ISO 19014.4:2022 pdf free download – Earth-moving machinery — Functional safety Part 4: Design and evaluation of software and data transmission forsafety-related parts of the control system

AS ISO 19014.4:2022 pdf free download – Earth-moving machinery — Functional safety Part 4: Design and evaluation of software and data transmission forsafety-related parts of the control system.
This document specifies general principles for software development and signal transmission requirements of safety-related parts of machine-control systems (MCS) in earth-moving machinery (EMM) and its equipment, as defined in ISO 6165, In addition, this document addresses the significant hazards as defined In ISO 12100 related to the software embedded within the machine control system. The significant hazards being addressed are the incorrect machine control system output responses from machine control system Inputs,
Cyher security is out of the scope of this document.
NOTE For guidance on cybersecurity, see an appropriate security standard.
This document is not applicable to EMM manufactured before the date of its publication.
2 Normative references
The following documents are referred to In the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 6750-1. Earth-moving machinery — Operator’s manual — Part 1: Contents and format
ISO 12100:2010, Safety of machinery — General principles for design — Risk assessment and risk reduction ISO 13849-1, Safety of machinery — Safety-related parts of control systems — Part 1: General princi pies for design
ISO 19014-1, Earth-moving machinery — Functional safety — Part 1: Methodology to determine safety- related parts of the control system and performance requirements
ISO 19O14•2:1), Earth-moving machinery — Functional safety — Part 2: Design and evaluation of hardware and architecture requirements for safety-related parts of the control system
3 Terms and definitions
For the purposes of this document, the terms and definitions in ISO 12100, ISO 19014-i, ISO 13849-1 and the following apply.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
The first artifact applicable to the process is the software development plan. The subsequent artifacts, defined by the plan, shall include:
— design specification and related verification report. for each software design phase (descending branch of the V-model in Figure 1)
— test specification and related test report, for each software (SW) testing phase (rising branch of the V-model in Figure 1)
— executable software.
4.4 Software safety requirements specification
The software safety requirements specification shall describe requirements for the following, if relevant:
— functions that enable the system to achieve or maintain a safe state:
— functions related to the detection, Indication, and handling of faults by the safety.related parts of control systems (SRP/CS);
— functions related to the detcctlon, indication, and handling of faults In the software;
— functions related to the online and of lime tests of the safety functions;
NOTE I An online test is performed while the system being tested is in use. An offline test is performed while the system being tested Is not In use.
NOTE 2 An example of an online Lest would be checking for faults in the steering system while driving the machine. An example of an ofiline test would be checking for faults in the steering system prior to allowing machine movement.
— functions that allow modifications of safety-related software parameters;
— interfaces with functions that are not safety-related;
— performance and response time;
— Interfaces between the software and the hardware of the electronic control unit.
Appropriate method or measures shall be selected from Table 3 to meet the specified MPLr.