EVCS MODBUS communication returns zero

Q&A and troubleshooting
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1

I’m trying to read the modbus registers with a MODBUS-reader for later use in OPENHAB.

When I try it with Node-Red on my Multiplus its fine. But over the network I’m getting zero values only.

Wrong addresses are answered with errors.

Are there any restrictions outside the victron universe?

2

No ideas?

When I try it via Node-Red on GX it’s working.

When I try the same on my LINUX-PC I get Zeros only - but no communication errors!