Multidroping on Modbus RTU node

General
1

Hello,

How to do Multidroping on Modbus RTU node.

I have multiple Energy Meters, I want to read parameters from each meter. I have checked with 1 Energy Meter and was able to get the data in node-red.

So how to configure in node-red for multiple Modbus RTU Energy Meter.

Br,
Devendra Songra

2

just like this:

grafik
grafik668×989 69.9 KB

3

Hello,

I am asking just to add a single Modbus RTU node in the flow and access multiple devices parameters, what is the process.

Please find my node-red flow screenshot, with this flow I am getting data from 3 different devices but sometimes it gives a timeout error randomly.

image
image1915×905 158 KB

Br,
Devendra Songra

4

I just see "Modbus Read" - I don´t know what´s behind it. Is it 1 device or are this 4 devices?

Try "Modbus getter" and trigger it with a inject for example every 5s.

5

Hello,

now my issue is resolved I have changed Queue delay (ms) in Modbus node, and now it is continuously running with 3 devices.

I think I have to vary Queue delay (ms) if I connect multiple Modbus devices and more parameters.

Thanks for the help.

Br,
Devendra Songra