Historical
IEC 61784-3-13 Ed. 1.0 b:2010
Industrial communication networks - Profiles - Part 3-13: Functional safety fieldbuses - Additional specifications for CPF 1
"IEC 61784-3-13:2010 specifies a safety communication layer (services and protocol) based on CPF 13 of IEC 61784-2 and IEC 61158 Type 13. It identifies the principles for functional safety communications defined in IEC 61784-3 that are relevant for this safety communication layer. This bilingual version (2012-02) corresponds to the monolingual English version, published in 2010-06."
International Electrotechnical Commission [iec]