question

Marc Schmaus avatar image
Marc Schmaus asked

mod-bus tcp Basics question

Hi all.

Playing around with mod-bus tcp a while.
Trying to get same power information like VRM portal.

Grid is ok: Its address 820+821+822 (Scale value 1)
Total Consumption is ok too: 817+818+819 (Scale value 1)


But:

AC Loads: 12+13+14 (Scale value 0.1)
Critical Loads: 23+24+25 (Scale value 0.1)

Please tell me why this two Power values are less accurate as the other too?

Is the victron VRM portal getting better information from my cerbo gx as mself?
How is victron getting AC loads and Critical Loads in this accurate form?

1693251952736.png


How getting consumption in kWh like on VRM portal? Is it my task too calculate Riemann Sum? Why isnt here no modbus value available? All other values are present.

1693252246494.png

Any advice greatly appreciated.
Sincerely
Marc



cerbo gxESSPylontechModbus TCP3 phase
1693252246494.png (19.9 KiB)
1693251952736.png (26.3 KiB)
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

1 Answer
jonofe avatar image
jonofe answered ·

I don't have the answer to your questions, but why are you not using MQTT to retrieve the data? Up to my knowledge also the VRM is using MQTT to get the data. So by using MQTT you should always have the same data in terms of frequency and value as the VRM portal is showing.

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.