Modbus with OpenPLC

General
1

I want to write a value 1 to a openPLC ( with IP 10.10.10.83 ) using modbus write node.
what values should I put in Unit-Id , Address , Add new Modbus client. As shown in the screenshot.

Thanks for the help in advance.

With warm regards.

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Screenshot from 2019-01-08 00-09-36.png1920×1200 230 KB

2

At least some of the answers are in the info panel on the right hand side…

3

I have filled the following values from info i got from panel on right hand side.

Screenshot%20from%202019-01-08%2002-09-14

Screenshot%20from%202019-01-08%2002-09-23

4

I was able to configure the modbus write node and connect to the openPLC instance running on my localhost ( IP: 127.0.0.1 and OS: linux ) successfully. however when I run the openPLC instance on Raspberry PI i am not able to connect my modbus write node. any suggestions ?
Both RPI and system where my node-red is running is pingable.