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from the Instrumentation department...
Modbus RTU to TCP converter
Communications systems and equipment. topic
Posted by Francisco on 14 October, 2009 - 7:49 am
I have a Modbus RTU network, and one RTU to TCP converter (Moxa MB3170). I would like to know if there is any change in the registers when converting from RTU to TCP.

Lets say, if for example the register 1 in the RTU device is for pressure what will happen in TCP. Will it remain the pressure at register 1?

Thanks in advance.
Francisco.


Posted by Fred Loveless on 14 October, 2009 - 2:32 pm
Yes it will remain the same. The address structure is exactly the same.


Posted by M Griffin on 14 October, 2009 - 6:34 pm
In a typical Modbus RTU to TCP gateway the data stays the same. It's just the wrapper around the data (for serial versus Ethernet) that changes. So, converting between RTU and Ethernet should not affect the register or coil data or the data table addresses.

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