Can you take my answer.
I'm reading 500 devises from ModbusTCP protocol. Only 10 registers from each devise. Does it is working, in one or more flows. And visualisation in to Node-Red Dashboard.
Will the node-red server have enough resources to process this amount of information? And how you can calculate the performance of the system when planning a project. Please share your options.
You need to tell us how often you are getting values and what kind of server you are using.