9/14/2009 10:01 PM | |
Joined: 7/2/2008 Last visit: 8/26/2024 Posts: 928 Rating:
|
Hello Eastern,
I haven't come across the term R-Redundancy but I think you mean warm standby (Software redundancy).
CP 443-5 is a Profibus CP. If you intend to use Profibus then you should go for CP443-5 Extended (Not the basic one). If you insist to go with Ethernet then you need CP443-1.
Redundant I/O's (Siemens library) works only with S7-400 H-Systems. You can find more info about it in fault tolerant S7 manual (Look at edr's link). However I/O redundancy in Siemens means some FBs and FCs that (Simply) 1- analyze diagnostic info to detect faulty channels or modules. 2- compare inputs to get the right value 3-write toredundant outputs (Analog outputs have some special manners). So, you can write your own code for that but think about the time you will spend on writing a perfect code and the effect of it on CPU's performance. It is far better to rely on RED_IO library. at least you will find support for it. I always think that software redundancy can be a key player in the market if it's configured using S7-300 CPUs but it would get out of competition if it's done with S7-400. Now, Siemens has introduced S7 412-3H to narrow the gap between software redundancy and hardware redundancy. I recommend to take a look at the new 412-3H CPU. I don't think there will be much price difference since you are going to use Ethernet CPs for redundant link. Best regards. H-H |
Last edited by: H-H at: 9/14/2009 10:05 PMtrying to fix <div class="quote"><div class="quoteHeader"> wrote:</div><div class="quoteContent"> problems Last edited by: H-H at: 9/14/2009 10:03 PM |
|
This contribution was helpful to
1 thankful Users |
Follow us on