9/25/2020 7:32 PM | |
Joined: 8/31/2005 Last visit: 10/22/2024 Posts: 2198 Rating: (328) |
Normal ET 200 are "stupid" devices that exchange there I/Os with the PLC/CPU. They only communicate with the CPU. The HMIs communicate only the CPU too. Due the CPU has all the information from the ET 200, this information may be shown or set in the HMI. So the CPU is the central element and all other components communicate with the CPU. An ET200 CPU is a S7-1500 CPU in ET 200 design and uses ET 200 Modules instead of the normal (bigger) moduels. That all. If you have several CPUs you can program a CPU-CPU communication and exchange data. Th standard is to use one CPU. More than one CPU is normally only uses if you need more calculation power (shorter cycle times) than one CPU can offer. All actual SIMATIC components (CPUs, ET 200 and panels) have at least two PROFINET ports. With one in and the other out you can create a line with all components without needing a switch/SCALENCE. Just go from one device to the next one. I'm not a HMI man, I don't know the Sm@rt options. I just know there is a limit in HMI resources of a CPU. The forum can give first information, but I agree to 1_Einstein, you should contact your local Siemens office (www.industry.siemens.com/aspa_app) to discuss your needs. Specially if it's a "Big Project". |
Last edited by: miami at: 09/25/2020 19:33:18 |
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