question

peter-vddriessche avatar image
peter-vddriessche asked

Trouble with Mode 2 connection to the "settings" service, cannot write to register 2700

I want to do time shifting using Mode 2.

But I'm having trouble connecting with Mode 2.


My Modbus TCP connection works. I can write for example register 22 which sits on the Unit-ID 246 (com.victronenergy.vebus). I an also read registers. So my modbus connection works .

But I cannot write register 2700 which sits on the Unit-ID 100 (com.victronenergy.settings).

When I look at my system on the VRM Portal, I see under Modbus TCP Services, the following list, where 'com.victronenergy.settings' is missing. Could this be the reason I cannot write 2700?


Any suggestions to solve this?


Best regards


Peter


com.victronenergy.vebus

com.victronenergy.system

com.victronenergy.battery

com.victronenergy.hub4

com.victronenergy.pvinverter

com.victronenergy.grid


ESSModbus TCP
2 |3000
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1 Answer
peter-vddriessche avatar image
peter-vddriessche answered ·

Problem solved. it was a program issue. Nothing to do with the Victron services.

Sorry.

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Guy Stewart (Victron Community Manager) avatar image Guy Stewart (Victron Community Manager) ♦♦ commented ·

Thanks for reporting back, I don't fully understand the issue or solution, but is there anything you could explain further if someone else comes across the same problem to help them?

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peter-vddriessche avatar image peter-vddriessche Guy Stewart (Victron Community Manager) ♦♦ commented ·

Hello Guy,

I am programming a battery steering algorithm in VBA excel. I had followed a very interesting online course on Udemy for this

https://www.udemy.com/course/how-to-program-microsoft-excel-as-a-modbus-master-hmi/learn/lecture/21224098#overview

Reading several registers in one go (ie using one 'handle' for a series of addresses) worked fine. The error I made was that I tried to write also several registers in one go. That did not work. When I changed this and wrote one one register per handle, it worked.

Best regards


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