Support for older EM24 Energy Meters

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wirehead asked Mar 22, '22

Support for older EM24 Energy Meters

Hi,

i trying for days now to get a EM24-DIN.AV5.3.D.IS.P (for use with CTs) to work with my setup (Venus v2.85). After testing with different RS485 USB convertes, UCS Software and BaseBlock Comtest i now know why it is NOT working. The Energymeter is manufactured in 2010, i can read the most registers via Comtest Software but i wasnt able to connect via UCS Tool from Gawazzi. The meter doesnt appear on VenusOS if it is connected via the orginal victron cable.

I find that the DeviceID that is read from 0x000B register (according to https://github.com/victronenergy/dbus-cgwacs/blob/master/software/src/ac_sensor_updater.h) on this device is 47. In https://www.ccontrols.com/support/dp/CarloGavazziEM24.pdf this refers to "M24-DIN AV5 input
product code". Reffering to https://github.com/victronenergy/dbus-cgwacs/blob/master/software/src/ac_sensor.cpp Line 47 the DeviceID must be 71-73 for successful connection.

Also the Device is missing Register 0x1300 (SerialNo String).

Can someone clever with coding tell me how i get the meter to work or could implement this?

I can imagine that some people had the same problems with other EM24 energiemeters they are also can be find as EM24-DIN.AV5.3.D.IS.X with the same old Firmware (r.C.00). The P only stands for MID certification.

Best Regards

Torsten

Energy Meter em24 rs485 power meter

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Answer 1 · 2022-03-24T08:26:07Z

wirehead answered · Mar 24, 2022 at 08:26 AM

Hi,

i have purchased two other meters and they arrived yesterday.

EM24-DIN.AV5.3.D.IS.X from 2021 and

EM24-DIN.AV9.3.X.IS.X from 2013

They are working fine out of the box at the first connect.

So i suggest to be carefull with buying meters from before 2013 or firmware r.C.00 if they should work in a victron enviroment.

best regards

Torsten

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Answer 2 · 2022-03-24T11:41:15Z

chuff answered · Mar 24, 2022 at 11:41 AM

Hi, this old type of EM24 could work ; i have always used old model from 2012 but the current software from venus does not work with it. You have to connect it thru a modbus tcp/rs485 converter and then modify the pyton program carlogavazzi.py on the venus to adapt the registers.

I agree this is not a easy work and you will also change again after a venus upfate.

Sure buying a new one from Victron could be a easy solution!

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mucmak commented · Oct 02, 2022 at 09:06 AM

Hi Chuff,

could you please share more details on your solution? I have exactly the same problem as @wirehead who startet this topic.

What Modbus TCP converter do you use and would you please show the details of your modified coding on the venus?

I really am stuck. I cant find a single available EM24-DIN.AV5.3.D.IS.X on the market. The EM24-DIN.AV5.3.D.IS.P I have is likely too old. And I urgently need a Version with a Current Transformer...

thank you!

mucmak

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