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7/10/2008 6:46 AM | |
Joined: 9/27/2006 Last visit: 9/22/2024 Posts: 12282 Rating: (2685) |
Hello Sinewbie; The only solution proposed by Siemens for redundancy on S7-300 PLCs is a apckage called Software Redundancy (SWR). It is software based, as its name implies, not hardware, like an H-system, so it is not considered a hot-backup system. Depending on the network youselecte to maintain the redundancy link between the CPUs, it can take up to a few seconds to shift from the primary CPU to the backup. But as I said, it is the only solution Siemens proposes. You can have a look at the manual here: http://support.automation.siemens.com/WW/view/en/1137637 Hope this helps, Daniel Chartier |
7/16/2008 11:02 AM | |
Joined: 9/28/2005 Last visit: 12/14/2022 Posts: 414 Rating: (28) |
Hi, This is not realy a good redundant solution. It is a very basic solution. A better solution is an S7-400H-system, e.g. with a CPU412H. See also this article for more information. with a S7-400H system you got a more PLC-like solution then with the s7-300 software tool. |
Smurf |
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7/17/2008 5:51 AM | |
Posts: 11 Rating: (0) |
Thanks for your replies! @ Dchartier: Thanks @ Smurf: Thanks, but the system is an existing one. I shall findafixing solution. Regards, |
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