Modbus read node overflow

[alibei]

Which node-red-contrib-modbus version are you using?

5.43.0

What happened?

I'm using the modbus read node to get the pv-inverter power from it's data logger.
If the power goes beyond 65535W the value overflows, showing for example 10000W instead of 75535W.

Server

Other/External server

How can this be reproduced?

Read a modbus address that has a higher value than 65535.

What did you expect to happen?

To show the correct value, for example 75535W instead of 10000W

Other Information

No response

[grewek]

Hey @alibei,

The maximum a Modbus register can hold is 65,536 (16-bit) so i would say that the overflow is expected behavior.

If your value is larger than that you usually have to read out more than one registers and put the value in the right order again.

If you need further assistance please let me know.