6/10/2021 2:12 AM | |
Joined: 4/29/2009 Last visit: 5/4/2024 Posts: 5 Rating:
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Is I-Device communication the best way to transfer 250words from 30 1200 PLCs and 1500 network master (total 7500words)? |
6/10/2021 3:21 AM | |
Joined: 10/7/2005 Last visit: 9/1/2024 Posts: 3018 Rating:
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Hi RRBRW it could be one way to skin this cat, but perhaps not the best and here it goes: 7500Words of I-Device I/O data requires 15kB of I/O address area in the S7-1500. While 1500's tend to generally have a total of at least 32kB of I/O address area, the amount of I/O data per I/O subsystem (e.g. PROFINET network) tends to be "only" 8kB (unless you have a high end S7-1500 CPU). First thing to check is thus your 1500's CPU's tech spec and if it is "only" 8kB per I/O subsystem, you will need a CM and split your 30 S7-1200's over two PROFINET Networks (which may not at all be desirable). |
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6/15/2021 6:18 AM | |
Joined: 10/7/2005 Last visit: 9/1/2024 Posts: 3018 Rating:
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It is horses for courses as they say, although I would personally probably use neither OUC nor OPC-UA and go for S7 communication via BSEND/BRCV in this case (see also https://support.industry.siemens.com/cs/us/en/view/26483647). If you want to get really fancy, you can also use the ready made example at "Data exchange via S7 communication between a S7-1500 (client) and several S7-1200 substations (servers)" |
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