asked
Hello! Who can help me with a Modbus TCP connection to the CCGX? Under which unit ID can the address 2901 be read or written?
Did you try Unit ID 100?
Hello! I have to pick up the topic again, with UNIT-ID 100 I can not read the register 2901. Who can help me? I would like to specify the minimum discharge value SOC via Modbus. Thank you!
I assume you have ESS enabled in your system since register 2901 refers to "ESS Minimum SoC (unless grid fails)"
Are you getting an error when you try to retrieve the value from Unit ID 100 or does it just return 0?
Not sure which device the dbus-service-name "com.victronenergy.settings" is referencing if it does not exist for ID 100. Victron can probably answer.
@Guy Stewart (Victron Energy Staff)
Pat
Answered my own question. Both register 2900 and 2901 are readable from Unit ID 100. See screenshot below.
Pat
I do not receive an error message, it simply comes a zero. Is it true that the 2901 is readable and writable? If Victron could say that, that would be great!
If you look in the "Modbus TCP Registry spreadsheet" there is a column named "Writable" that will tell you if the registry item is writeable or not.
Pat
You need to download the Modbus TCP Registry spreadsheet. In can be found here:
https://www.victronenergy.com/support-and-downloads/whitepapers
It also has a Unit ID to Device ID sheet.
Pat
Hello! The Modbus function to write register 2901 works, thanks for the support. I have another question: where can you read what the current utilization of the solarcharger is? Is the Maximlae Powerpoint visible in a Modbus register? I want to find out how much power reserve my solar panel still has to control a heating cartridge. Best regards, Roland
