Node-red disconnects using modbus

I use the Node Red to send data in Modbus to a PLC, it is sent every 5s but for a moment the Node Red disconnects and it stops sending the data.
I configured the Node Red to start automatically with the Raspberry Pi.
I use the Raspberry with root privileges on port 502 TCP.

@samirovic Can you link to the exact Modbus node you are using (incl the version you have installed, of both that node and Node-RED), and also show a screenshot of your settings for that node?

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