to two IO controllers (IOCs). Compared to NAP S2 and NAP R1, in this case access can be made to four possible communication relationships, which is called an AR set of four ARs in the P.

R2 redundancy expands on the R1 concept to create a more fault-tolerant system. R1 redundancy on the left is functionally equivalent to S2 redundancy, without the single point of failure in the NAP. R2 redundancy adds yet another level of assurance and high availability.

Jul 28, 2024 · 西门子s7-1500r/h冗余系统分热冗余和冷冗余，涉及mrp、nap等术语。了解profinet的s1、s2、r1、r2四种冗余配置，有助于设计或理解系统拓扑。

Mar 12, 2025 · With confirmation in place, the trader enters a short position, setting a stop loss just above the R1 level and targeting a move down to S2.

Aug 30, 2018 · Four PROFINET system redundancy configurations have been defined by PROFIBUS & PROFINET International: S1, S2, R1, and R2. First, S or R denotes whether a PROFINET node implements either a S ingle or a set of R edundant Network Access Point (NAP).

PROFINET 中通过系统冗余（System Redundacny，简称 SR）功能来定义 IO 控制器与 IO 设备的冗余关系，与 PROFIBUS 中有所不同。 根据冗余级别有 S1,S2,R1,R2 四个级别。 系统冗余是指 IO 设备通过 PROFINET 与两个容错的 CPU 之间进行通讯连接。 该通讯连接可以通过任何网络拓扑（星形，树形，环形网络）的互连来建立。 以下 IO 设备支持系统冗余功能（NAP S2）： · ET200M HF V4.0. · ET200SP HF V3.0. · Simocode pro V PN V1.2.0. · SIMATIC S120.

May 9, 2019 · Four PROFINET system redundancy configurations have been defined by PROFIBUS & PROFINET International (PI): S1, S2, R1, and R2. The terminology used here is based on a gradation that reflects the degree of fail safety that …

PROFINET has four components of its redundant system: Media Redundancy, Controller Redundancy, Device Redundancy, and Network Redundancy. There are four types of redundancy built into the PROFINET protocol, each one addressing a unique failure mode within an automation system. Click to expand.

Redundancy mechanisms turn a reliable system into a highly available system, adding extra components or functionality to maintain reliable operation through a number of failures. This White Paper goes over the four components of a PROFINET redundant network. Then, it covers PROFINET’s scalable system redundancy configurations. Table of Contents.

Each configuration can be used to achieve some level of availability that are described as S1, S2, R1 and R2 connections. R1 availability with Device, Media and Network redundancy. Network Redundancy fits in to the high availability concept at the highest levels of complexity.