How to change the Output Voltage and Frequency via NodeRed?

Modifications Node-RED
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1

I’m trying to change the Ac Output Voltage and frequency. My three MultiPlus II are connected to a DC power source and Modbus/TCP is activated. I’m using the node-red-contrib-modbus nodes, but I just can’t find the right setting. My Cerbo GX wont show me the device list anymore, so finding the correct Unit ID is a bit tricky. Currently I’ve set it to 100.
I’m using a standart inject node with msg.payload and a number, which is injecting into a Modbus write node with FC 6. I always get error codes in the remote console, but never a change in the AC Output. On top of that I’ve tried what feels like every address which could be for AC out.

There were a few people on the old cummunity page that told me it is possible. But no one told me how..
I’m thankful for every tip.

2

I Don’t think that this can be done by Node red.
These are VE configure inputs, and are not meant to be written frequently. They also require an inverter reset after changing (at least frequency).
The PV inverter assistant does manage to change the inverter frequency dynamically, so it may be possible to use that.

3

Hi, I’m using the PV Inverter assistant. It is not possible to access the assistant via node-red?