WG 15 - TC 65/SC 65B/WG 15

IEC 61499-4:2013 defines rules for the development of compliance profiles, which specify the features of IEC 61499-1 and 61499-2 to be implemented in order to promote the following attributes of IEC 61499-based systems, devices and software tools:
- interoperability of devices from multiple suppliers;
- portability of software between software tools of multiple suppliers;
- and configurability of devices from multiple vendors by software tools of multiple suppliers. This second edition cancels and replaces the first edition published in 2005. It constitutes a technical revision and includes the following significant technical changes: Table B.1 has been updated for consistency with Table 8 of IEC 61499-1:2013.

IEC 61499-2:2012 defines requirements for software tools to support the following systems engineering tasks enumerated in IEC 61499-1:
- the specification of function block types;
- the functional specification of resource types and device types;
- the specification, analysis, and validation of distributed IPMCSs;
- the configuration, implementation, operation, and maintenance of distributed IPMCSs;
- the exchange of information among software tools. This second edition cancels and replaces the first edition published in 2005 and constitutes a technical revision. This edition includes the following significant technical changes with respect to the previous edition: The contents of Annex A have been updated to conform to the technical changes of the second edition of IEC 61499-1. CDATA sections are now allowed for the textual contents of algorithms in Tables A.4 and A.5.

IEC 61499-1:2012 defines a generic architecture and presents guidelines for the use of function blocks in distributed industrial-process measurement and control systems (IPMCSs). This architecture is presented in terms of implementable reference models, textual syntax and graphical representations. The models given in this standard are intended to be generic, domain independent and extensible to the definition and use of function blocks in other standards or for particular applications or application domains. It is intended that specifications written according to the rules given in this standard be concise, implementable, complete, unambiguous, and consistent. This second edition cancels and replaces the first edition published in 2005 an constitutes a technical revision. It includes the significant technical changes with respect to the previous edition related to: Execution control, Temporary variables, Service sequences, the syntax for mapping of FB instances, the Syntax for definition of segment types, the Function block types for interoperation with programmable controllers and the READ/WRITE management commands.