Hello Everyone,

I am not able to find a I/O system which has Profinet System Redundancy R2. Is there any?

Thanks

Hello Everyone, 

Can I use ET 200SP HA? in its datasheet it mentions Profinet System Redundancy Mode S2, R1. Does it mean either ET 200SP HA can be used S2 only or R1 only or S2 and R1 combined which is same as R2 System redundancy mode.

Please respond soon.

Thanks

Hello Raghu Kodi;

This document will give you a good presentation of Pofibet redundant configurations S1, S2, R1 and R2.

https://support.industry.siemens.com/cs/attachments/109756450/109756450_PN_Systemredundanz_V1_0_en.pdf

As you can see, S2 and R1 (for example) cnnot be setup concurrently with a single controller. You have to choose one or the other, based on your project requirements.

Hope this helps,

Daniel Chartier

Thanks dchartier for your kind reply. I see that document specifies about an I/O system with Profinet system redundancy R2 configuration but I am not able to find an I/o system which has Profinet system Redundacy R2 configuration.  ET200 SP HA in its datasheet specifies Profinet system redundancy S2, R1 which in combination works like R2 i think, but you have mentioned such a possibility is wrong configuration ie either S2 or R1 for ET200 SP HA. Is there any I/O system with Profinet System Redundancy R2?                           

Thanks

Hello Everyone,

Can anyone please check about any IO system with Profinet System Redundancy R2? I couldn't find any.

Thanks

Hello Everyone,

Could any one help me with the above query.

Thanks

Hello Raghu Kodi;

Profinet redundancy schemes (S2, R2, R2) are a recent decelopment. And although there are quite a few articles and white papers discussing the R2 redundancy devices I doubt manufacturers have as yet tested and come out on the market with such redundant IO Devices.

Siemens for example. is a great supporter of Profinet, marketing many IO Controllers and IO Devices in its catalogs. They also support S2 redundant devices without hesitation. But if you go to the Industry Mall, the Siemens electronic catalog, where all available automation equipment from Siemens can be sourced, there is not a single product supporting Profinet R2 redundancy. This us shown in the screenshot below.

This is not an unknown situation. Almost 20 years ago Profibus International published the specifications for Profibus Flying Redundancy, a scheme that would allow Profibus slaves with 2 Profibus connections to 2 redundant Profibus masters,  and with firmware allowing them to switch to a secondary master in case of switchover. Great idea, generating a lot of buzz in the community. In 20 years I personnally have come across exactly 2 products on the market supporting Flying Redundancy, one from ABB and  one from Rotork, if my memory is correct. It seems that most integrators and end-users were not willing to pay the extra cost of the redundant Profibus intetface on the slave, and did not find that the scheme gave them enough of an advantage to warrant the complexity of setting them up. 

For the moment my searches have found no Profinet R2 compliant devices on the market. The automation community seems satisfied with S2 redundancy, at rhis time. When a vendor comes out with a line of R2 devices, the news will certainly reach you through articles and websites dedicated to automation.

Hope this helps,

Daniel Chartier 

https://www.youtube.com/watch?v=CyKJe2eHTCs