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| 6/11/2009 3:58 PM | |
Joined: 3/18/2009 Last visit: 2/8/2022 Posts: 306 Rating:
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Yes you are right. It should work perfect.
In this case it is not necessary to use CP1613 and Scalance. Even on board LAN cards and DLINK switches are ok. (You will still require a CP 443-1 for each CPU) Just take care of the rightsimatic net licenses.
Yes. No problem. ES-OS-PLC, all can communicate on TCP/IP.
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| 6/14/2009 1:04 PM | |
Joined: 10/7/2005 Last visit: 12/6/2023 Posts: 2997 Rating:
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Hello Karen Daniel Chartier is correct, but this doesNOT necessarily mean that you have to spent money for the Softnet licenses. A licensed copy of Softnet-S7 Lean is included in the scope of supply of WinCC (I believe Siemens introcuded this with V6.0 but don't quote me on that. It certainly ships as a "freebie" with V7.x of WinCC) This Softnet-S7 Lean allows up to eight connections (just enough for the 7 PLC's that you have) wheras the "full" Softnet allows up to 64 connections. I hope this helps Cheers Fritz |
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| 6/14/2009 10:32 PM | |
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Posts: 16 Rating:
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Thank you all I think it all helps me to make corect dessign and spend minimum of money thanks again |
| 6/15/2009 1:17 PM | |
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Joined: 10/7/2005 Last visit: 12/6/2023 Posts: 2997 Rating:
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Hello again Karen you are correct, if you need high Network availabilty youwill need to opt for a ring structure. If you need even higher availbility of your whole control system (not onlythe network) you can spent some real money and opt for an S7400 H system (H = High availabilty) in which case you end up with 2 CPU's and willopen up a can of worms with regards to the "availabilitylevels" of the I/O's that you can choose to implement. Let's stick with pure Network redundancy for now and onto your remaining questions: 2.) A qualified "yes" as long as you make sure to have one so called Redundancy Manager (RM) Switch in the ring (who's task is to monitor and managethe ring). It does so "breaking" the ring (i.e. your ring is really just a line which starts and end at the RM Switch) as long as all is ok in the ring. In case of a failure (e.g. ring is cut somewhere), the RM Switch will recognise this and close both ends internally and as such maintaining the whole line. All switches in the X200 range that have IRT capability also have Ring Manager capabilty so you will need ONE X200-IRT in your ring (all other can be any of the cheaper non-IRT X200 versions and pleasenote that you can NOT use the unmanaged X100 Switches for this). 3.) Easily "Yes" as far as I'm concerned, but here is what Siemens has to say (ref Siemens IK PI catalogue): "In an optical ring comprising 50 switches, the network will be reconfigured after an error (cable break or switch failure) in less than 0.3 seconds. The connected data terminals remain unaffected by the changes in the network and logical connections are not disconnected. Control over the process or application is assured at all times." I hope this answers your query and good luck with your project. Cheers Fritz |
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