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alfsav asked

Carlo Gavazzi EM340 EnergyMeter not detected.

! am trying to configure my Victron solar system to ESS.

I have installed a Carlo Gavazzi EM340-DIN.AV2.3.X.S1.PF B energy meter in my house in Norway. The grid is 230V IT (3 phase / 3 wire + gnd, no neutral). See system schematic.

Solar install _3 systems 2024.pdf

I can communicate with the meter using USB to Serial RS485 and the Carlo Gavazzi UCS 7 - Universal Configuration Software from my Windows laptop (see screenshot).em340-comms2.jpgem340-comms1.png

It is not detected as a Carlo Gavazzi meter over RS485. Nor is it recognized as a Modbus TCP device in Victron Connect.

The Victron Inverter is conneted to Phase 1 and 3.

I Have a grid-tied inverter on PHase 2 and 3, and another grid-tied inverter on phase 1 and 2.

I need some help to figure out why it does not show up on Victron Connect.

Energy Meterrs485
em340-comms1.png (56.6 KiB)
em340-comms2.jpg (68.3 KiB)
solar-install-3-systems-2024.pdf (245.8 KiB)
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alfsav avatar image alfsav commented ·

Here is the EM340 documentationem340.pdfEM340 Installation and use.pdf

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em340.pdf (410.0 KiB)
em340-installation-and-use.pdf (967.3 KiB)
xrtx avatar image xrtx commented ·
I am having a similar issue with a 3 phase Carlo Gavazzi meter, which has worked for years without an issue but the Venus GX no longer seems to 'see'. I am using the meter, cable/RS485 connector and GX, which are all supplied by Victron.
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6 Answers
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Duivert NL answered ·

Do you use a supported rs 485 to usb converter cable?

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alfsav avatar image alfsav commented ·

I do not have and oem Victron Serial adapter. I bought 2 different adapters that is tested fine on an Off-Grid Garage video on Youtube. They do not work on my system. URL: https://www.youtube.com/watch?v=I6qz5ZIKzTA&pp=ygUJcnM0ODUgdXNi


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jetlag answered ·

I had also some crazy effects using non-isolated RS485-USB converters. By connecting to the USC software on your laptop, you have only one device, connecting to the GX device, you might have ground-shifts and other issues that might result in this problem.

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alfsav answered ·

I have tried two different ftdi adapters with no result. The last one had a shielded wire but made no difference. I decided to order Victron adapter to see if that can reslove it.

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alfsav answered ·

By the way; all non supported adapters will connect my Daly BMS to VictronConnect without problems.

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Duivert NL answered ·

Are you using a cerbo or a GX multiplus? And do u use a usb hub?

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alfsav answered ·

Raspberry PI 3b with latest Venus OS. All usb adapters (4 ea.) are connected directly to the PI.

PS. I am still waiting for the Victron approved adapter.

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Duivert NL avatar image Duivert NL commented ·
ok, i have no experience with PI
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