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| 12/27/2009 4:49 AM | |
Joined: 11/29/2009 Last visit: 9/24/2024 Posts: 19 Rating:
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I have two s71200 cpus (dc/dc/rly). now I want the two cpus could communicate. |
Last edited by: freefly2009 at: 12/27/2009 4:50 AM |
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| 12/27/2009 1:14 PM | |
Joined: 10/7/2005 Last visit: 12/3/2024 Posts: 3028 Rating:
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Hello freefly2009 The CSM1277 Ethernet switch is just a simple unmanaged 4 port Ethernet switch, any other Ethernet switch (managed or unmanaged) can beused instead of it. If you do not have a switch available you can also directly connect the two CPU's with an Ethernet cable (whichcan be a direct or crossover cable, the PN port of the S7-1200 does have the so called "Auto crossover" functionality inbuilt). Bottom line, the the "missing" CSM1277is not your problem, so its either your program/configuration or a faulty Ethernet cable (I don't yet have Step 7 Basic and can't unfortunately verify yourprogram). I suggest you first get your hands on any Ethernet switch you can find so you can link teh two CPU's ADN your programmig nlaptop together to be able to test your comms setup and logic (you are locking yourself out from this at the moment if you link the two CPU's directly with an Ethernetcable). I hope this helps and good luck |
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