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SIMATIC S7-400 / S7-400H / S7-400F /FH

Redanduncy

Thread Starter: kiran p   Started: 8/1/2012 1:21 PM   Replies: 4

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  8/1/2012, 1:21 PM
kiran p
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Hi, I am using two number of CPU 414-2DP and IM 151 redundancy bundle, please tell me how to do hardware configuration for this for achieving redundany, if u have any backup or screen shots please send me.
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  8/1/2012, 2:08 PM
dmertens
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Unless you have purchased two identical S7-400H CPU's, not standard CPU's there is no way you can have redundancy. I would allways advice to purchase a redundant bundle as these have been system tested for redudancy operation. Furthermore the S7-414-2DP as far as I remember is a standard CPU with 2 profibus DP ports with a fair number of years on its belt as currently there is no CPU with this name available (The current redundant version is 414-5HPN/DP and the current standard CPU versions are 414-2, 414-3, 414-3 PN/DP and 414F-3 PN/DP).
The IM151 redundancy bundle you reference is probably an IM151-8 which allows installation of a PROFINET (not PROFIBUS) in a redundant ring configuration between two H CPU's with firmware 6.0 as a minimum (brand new). 
So I fear you are on the wrong track. 
Following link provides you with the manual for redundant systems, I would suggest you read it first before attempting to waste a lot of time and money 
https://support.automation.siemens.com/WW/llisapi.dll?func=cslib.csinfo&nodeid0=10805404&lang=en&siteid=csius&aktprim=0&extranet=standard&viewreg=WW&objid=10805188&treeLang=en

Kind regards,
David 
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  8/3/2012, 6:42 AM
kiran p
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Hi I am going for redundancy not for Hot redundancy. I think it is possible through CPU 414-2DP. Please see the manual attached below.

Attachment: S7_swr_b_en-US.pdf  (11 Downloads)
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  8/3/2012, 8:45 AM
Ayman Elotaify
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kiran p wrote:
Hi I am using two CPU 414-2DP and redundancy bundle of IM-153 for doing redunancy system. Please tell me how to do hardware configuration and any extra thing we have to while doing programming. If u have any backup of hardware configuration please send me.
Hello,
You have to start with this Manual:
Hope this helps.
Ayman Elotaify
MISC Egypt
www.miscegypt.com
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  8/3/2012, 9:13 AM
dmertens
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Why would you do that, it is more expensive (extra profibus CP's needed) and requires a lot of work that you simply don't have with the redundant CPU's. Also any connection with WinCC you have to create fro each CPU (with each tag existing twice, also a lot more expensive) and there is no automatic switch from one to the other. With redundant PLC you connect trough an S7-redundant connection (requires Simatic HARDNET CP's and REDCONNECT option).,
The software redundancy was originally developed for low cost S7-300 controllers,  I was not aware that anybody would ever want to use that on a 400 series PLC as there a re far better options available there.
The 400H CPU's are in the same price range as the standard CPU's and they work redundantly out of the box.  Furthermore as I have already stated Profinet in a redundant ring configuration is only supported as of firmware version 6, currently only available for 400H CPU's. The setup of this type of redundancy is simple, just go from your CPU to the first station, then from there to the next stations ... and at the final station go to the redundant CPU. This is completely different from profibus where you would have two IM153's for each redundant ET200M rack, one linked to the profibus of each CPU.
So if you want to press ahead with your current plan, you should consider getting the profibus redundancy bundles (ET200M with 2 IM153HF) in stead of profinet IM151. This also means replacing all ET200S with ET200M racks which may be a lot more expensive than buying new CPU's if the IO is already installed.
Hope this helps you, but I would also advice you to get a local siemens representative to help you decide on the best way forward.
Kind regards and good luck with your project,
David
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