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Hello,
Can I use the same interface as a PROFINET IO master and still be a MODBUS TCP server and MODBUS TCP client? Or do I need to separate PROFINET and MODBUS by using two interfaces?
Hello, Yes, you can typically use the same interface for both PROFINET IO master *and* MODBUS TCP server/client functionalities on many Siemens devices (like some SIMATIC ET 200SP CPUs). However, it's not universally true for *all* devices. **Check your specific CPU/device's documentation on SiePortal** to confirm simultaneous support and any limitations. Some devices might require specific configuration or have performance considerations when handling both protocols concurrently on a single interface. To find the documentation: [https://support.industry.siemens.com/sieportal/](https://support.industry.siemens.com/sieportal/) **Search for your device model + "PROFINET MODBUS TCP"** to find relevant FAQs and manuals. **Siemens Self Support** - integrated with SiePortal.
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