Dear Experts 

  Is it possible to use S7-400H as slave redundant profibus through DP/DP coupler ( 6ES7158-0AD01-0XA0 )  ?  YES / NO

If yes , then how can be configure to  change over between  two DP/DP couplers ?

Best Regards

Hi,

See this thread:

Y-Link and DP/DP Coupler

They discuss the same issue.

I hope I could help!

HELLO

 Actually The Y link is not suitable for  my configuration ,  where we have to  communicate the S7-400H CPU as redundant  Profibus SLAVE  with the third party DCS which is redundant  Profibus MASTER  through redundant PROFIBUS  .

Is there someone experienced this ?

Best Regards

Hi,

Regarding to use one sided config. The configuration you uploaded in your initial post is similar to a so called "single-channel, one-sided I/Os" config. You can read about this in SIMATIC Fault-tolerant systems S7-400H manual under chapter "13.2 Using single-channel, one-sided I/Os". So there is some literature to study for that if you want to consider to implement this.

Anyways just a comment on Y link:  Have you considered to use something like ("H-System"->"Y-link"->"DP/DP"->"3rd Party DP A" )? The same for the "3rd Party DP B"?

Think about it!

Hello

  The attached Hardware configuration with Y-LINK will do  ?

Best Regards

Hi,

I think it is an option to think about. Consult it with your 3rd party supplier and check the configuration against your requirements! If it all looks OK, test it!

Please come back and let us known how did you solved the issue!

I hope I could help!

Hello

   How to set and configure  the DP/DP coupler 1 I/O  with DP/DP coupler 2 I/O as redundant IN STEP 7 ?

If there is no provision for that ,  then

how possible to change over between DP/DP 1 and DP/DP 2 couplers I/Os ?

Best Regards

Hi,

I do not think you can set up DP/DP couplers as redundant module. Note: The  SIMATIC Fault-tolerant systems S7-400H detail how to use "fault-tolerant S7 connections" .

Your questions regarding to the S7-400H/Y-link/Coupler:

Switch over. The Y-link should handle the switchover on same manner on both couplers. In SIMATIC Fault-tolerant systems S7-400H manual page 169 you can read:

"The path via the currently active DP interface or PROFINET interface is called the active
channel, while the path via the other interface is called the passive channel. The DP or PNIO
cycle is always active on both channels. However, only the input and output values of the
active channel are processed in the user program or output to the I/O..."

Failure downstream Y-link.  As you can read DP/DP Coupler page 1-3 under features:

"If one side fails, the output values of the other are retained"

As you see the options with a DP/DP coupler are limited.

Note: why not consider to implement something like one of the example in SIMATIC Fault-tolerant systems S7-400H chapter "14.6 Communication via fault-tolerant S7 connections"?

I think we are going into the deep end of H systems so maybe this topic should be better discussed further in the S7-400H conference.

I hope I could help!