Modbus RTU with Star Topology

J

Thread Starter

JulienN

Good morning everybody!

I have a little question about modbus wiring. Usually, our PLC is linked to slaves using a bus topology, but for a new project the installer has wired all the slaves using the star topology.

We have about 15 slaves and the communication was tested with 5 slaves and it works (with a line polarization)!

Before this test I was certain that the Star topology didn't work with Modbus RTU. that's why I request your help.

Could you please tell me if it is better to remove the Star topology and wire all slaves with bus topology, or will the Star topology will work correctly?

Thanks a lot for your answers

Best Regards,

Julien N
 
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