You can access the SI6048 with a PC using a RS485 USB adaptor and using the Sunny Data Control program on the PC, use the RS485 connections on the SI6048. There is no FTP access.

SDC 3.93

https://files.sma.de/downloads/Sunny%20Data%20Control_3.93.exe

The installer login so you can change parameters is username inst password ID00(Day+month+year) so todays password is ID00(27+9+23) = ID0059
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hedges wrote:

(Hello! I have an Off Grid installation consisting of a Sunny island and a Sunny Boy connected by Webbox, along with a backup generator set. To monitor the installation use the modbus protocol. This protocol allows me to read data periodically. Now, I want to write in your logs daily to prune the %Dod Inf, %Dod Sup and the battery charge current value (128 InvChrgCurMax). For this last parameter, the address that appears in the MODBUS document is incorrect: https://studylib.net/doc/25277802/webbox-modbus-tb-en-19 You have to modify this value through an FTP server, but a file does not appear in the file repository so that you can modify this value. Can you help me with either option? With a newer version of the Webbox MODBUS file or with downloading the FTP file of the Sunny Island configuration. THANK YOU)

I'm sorry, I have not gotten into the protocol at all. I just use Webbox as an interface between PC and inverters (direct crossover RJ45 cable, not networked), and as a data logger.

If you have Webbox connected to the internet, be aware that it has known security vulnerability.
I did see FTP mentioned in some documents.

https://diysolarforum.com/threads/sma-webbox-vulnerabilities.24335/