Retrieve Critical Loads from Modbus TCP

Modifications
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1

Hello Victron Community,

I’m looking for the Modbus addresses to retrieve only the critical load data, specifically the power in watts.
It seems these values are not listed in the Modbus TCP Excel sheet.

System setup:

  • Cerbo GX
  • MultiPlus-II (3-phase setup)
  • Pylontech battery

Has anyone already found a way to access this information?

Thank you in advance!

VRM Overview
VRM Overview1915×1116 137 KB

2
3

Thanks for the reply, Alex. I found the topic, but it is not delivering the correct data. It might be related to the setup — how the values are populated?

4

Which registers are you reading and what values are you seeing?

5

Test Results – Modbus Values from “register-list-3.50”

I have tested the following Modbus values from the register-list-3.50 document. These values are read successfully using Loxone. Please refer to the screenshot below for further explanation.

| Service                    | Description                                | Register | Type   | Multiplier | Range                         | Path                                      | Writable | Unit        | Notes                                         |
|---------------------------|--------------------------------------------|----------|--------|------------|-------------------------------|-------------------------------------------|----------|-------------|-----------------------------------------------|
| com.victronenergy.vebus   | Output power L1                            | 23       | int16  | 0.1        | -3276.80 to 3276.70           | /Ac/Out/L1/P                              | no       | VA or Watts | Sign indicates direction, same as output current |
| com.victronenergy.vebus   | Output power L2                            | 24       | int16  | 0.1        | -3276.80 to 3276.70           | /Ac/Out/L2/P                              | no       | VA or Watts | Sign indicates direction, same as output current |
| com.victronenergy.vebus   | Output power L3                            | 25       | int16  | 0.1        | -3276.80 to 3276.70           | /Ac/Out/L3/P                              | no       | VA or Watts | Sign indicates direction, same as output current |
| com.victronenergy.system  | Power on output of inverter/charger, L1    | 878      | int32  | 1          | -2147483648 to 2147483647     | /Ac/ConsumptionOnOutput/L1/Power          | no       | W           |                                               |
| com.victronenergy.system  | Power on output of inverter/charger, L2    | 880      | int32  | 1          | -2147483648 to 2147483647     | /Ac/ConsumptionOnOutput/L2/Power          | no       | W           |                                               |
| com.victronenergy.system  | Power on output of inverter/charger, L3    | 882      | int32  | 1          | -2147483648 to 2147483647     | /Ac/ConsumptionOnOutput/L3/Power          | no       | W           |                                               |

Loxone reading Modbus values
See the note in the screenshot below for further explanation:

593×175 39.8 KB

Active consumption at the moment of data capture:

447×413 10.8 KB