标准摘要
[中文适用范围]： IEC 61784-3 系列的这一部分指定了基于 IEC 61784-1 的 CPF 1 以及 IEC 61158 类型 1 和 9 的安全通信层（服务和协议）。它确定了 IEC 61784-3 中定义的功能安全通信的原则与该安全通信层相关的。 [外文原描述]： 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.
英文名称Industrial communication networks - Profiles - Part 3-1: Functional safety fieldbuses - Additional specifications for CPF 1