Rotronic RMS Forum

Read out MODBUS TCP with MODBUS Master

Thread #2899 | 2023-12-11 16:15 UTC | James | replies: 1
Post #1 | 2023-12-11 16:15 UTC | James
Please check with RMS-CONFIG what the MODBUS byte order settings of the Logger are:
image.png
Once this is done, we configured the MODBUS Master to read out the following data:
image.png
The final step was to understand the word swap meaning:
  • Read out: 822A 41C3
  • Word swap: 41C3 822A
With a floating point to hex converter, we then get a reading:
image.png
This corresponds (more or less because of the live reading) to the value in RMS-CONFIG:
image.png
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Post #2 | 2023-12-11 16:23 UTC | James
Quick pointer: for any integration of RMS devices via MODBUS TCP, always check the byte order with RMS-CONFIG!

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