8/17/2009 1:16 PM | |
Posts: 325 Rating: (13) |
Hi, Find attached list of modules which support IO redundancy. Hope this helps. Regards Nil AttachmentIO-Red.pdf (1050 Downloads) |
8/17/2009 2:10 PM | |
Joined: 7/2/2008 Last visit: 9/30/2024 Posts: 928 Rating: (308) |
Hello Tomy, ET200S, ET200M & ET200iSPenable hot swapping feature. For the numbers of I/Os you have mentioned, If you go for ET200S (8 DI, 8 DQ, 4AI) then you will have around 80 modules which means min. 2 interface modules. Number of IM depends on, 1- I/Os centralized or distributed. 2-Installation technique(many installation techniques can't afford 64 modules per IM). For ET200M (32DI,32DQ & 8AI) then you will have21 modules which also means min. of 2 HF interface modules. You will need deep S7-300 rail and active bus units for all modules. ET200S has the advantagethat it's mounted on 35mm DIN rail which means it doesn't need deep S7-300 rack and active bus modules. Maybe the ET200S solution will be cheaper. I don't knowabout price differences between the 2 solutions but I think you should calculate it. Hot swappingdepends on both the CPU and theinterface module. For Profibus, Only S7-400CPUs have OB83 in theiroperating system which is essential for this kind of interrupts. There's a trick in S7-300 to usestandard slaves from GSD files. I tried it with ET200M and was never satisfied with results. I don't know if it works well with ET200S. For Profinet, both S7-300 and S7-400 PN CPUs have OB83. Best regards. H-H |
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