4. Configuration & Monitoring
The VM-3P75CT is configured via VictronConnect.
When using a VE.Can connection, the VM-3P75CT is automatically detected once connected to the VE.Can port and properly terminated. Ensure that the VE.Can profile of the GX device’s VE.Can port is set to 250 kbit/s.
When using an Ethernet connection, the VM-3P75CT is automatically recognised by the GX device.
VictronConnect configuration and monitoring
There are two ways to connect to the VM-3P75CT with VictronConnect from a mobile device, laptop, or PC:
Directly via Ethernet using the Modbus/UDP connection in the local network.
Remotely via VictronConnect-Remote (VC-R), using either VE.Can or Modbus/UDP (requires the GX device to be connected to the VRM Portal).
The VM-3P75CT supports Instant Readout of key data (total power and power per phase) directly from the Device list (1) in VictronConnect. This works via both a local network connection and VictronConnect-Remote (VC-R).
The VictronConnect data display is divided into:
A Status page (2), displaying frequency, line-to-neutral voltage, line-to-line voltage, power factor (according to IEEE convention), phase sequence for 3-phase configuration, phase rotation warning for 3-phase configuration, and protective earth voltages as well as neutral and line current.
An Energy page (3), showing the energy fed into and purchased per phase.
Tapping the cog wheel in the top-right corner of the Status or Energy page opens the Settings page. From here, you can adjust the network settings and configure the meter.
The Settings menu (4) includes the following options:
Role: (8) Set this to Grid meter, PV inverter, Generator, AC load, EV charger, or Heat pump, depending on the appliances you want to measure.
Phase Configuration: (7) For single-phase installation, set to Only L1. For three-phase installation, set to 3-phase. For split-phase installation, set to Split phase.
Energy registration method: (10) Default: Vector. Energy registration methods vary by country. Consult your energy supplier to confirm the method used in your region.
IP Configuration: (5) We recommend leaving this setting on Automatic (DHCP). Manual configuration (6) is only necessary in very rare cases. Contact your network administrator for the details.
Position: (9) If the role is set to PV inverter, AC load, EV charger, or Heat pump, adjust the position depending on where it is connected relative to the Multi/Quattro AC input or AC output.
LED pulse output: (10) The status LED can be configured as an energy pulse signal to provide a quick visual indication of load. Each pulse corresponds to a defined energy amount. Options are: Disabled, 10 Wh (default), 100 Wh, and 1 kWh.
Phase rotation: (4) Enables a phase rotation warning. Disabled by default.
Once the Role has been properly set, the configuration is done.
GX device monitoring
After the VM-3P75CT has connected to the GX device in the local network, it must be activated in the Modbus TCP/UDP menu before it appears in the Device list.
Navigate to Settings → Integrations → Modbus Devices → Discovered devices, and enable the discovered energy meter. By default, the device is disabled when first installed and powered on.
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After activation, the energy meter appears in the Device list and the Overview page, from where you can access the following parameters:
AC Phase L1..L3: voltage, current, power, power factor
AC Totals: power, forwarded energy, reversed energy
Energy L1..L3: forwarded energy
Reversed Energy L1..L3: reversed energy
Device page: overview of the connection and hardware-specific data, with the option to assign a custom name to the meter
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4.1. LED codes
The VM-3P75CT has a built-in LED that shows the status of the energy meter.
The LED states are as follows:
Blinking fast alternately green/red: Bootloader/update mode.
Solid green: All ok, normal running mode.
Blinking green @ 1Hz (50% duty cycle): Identify unit. Stops after 60s.
Off for 3 seconds, on for another 10 seconds and off again while pressing the reset button for about 15 seconds: Reset to factory defaults.
Off and immediately on after pressing the reset button briefly: Restart the device.
Solid red: The LED will illuminate solid red if there is an error.
Short red pulse: Each pulse corresponds to a specific amount of energy passing through the meter. These pulses represent increments such as 0.01 kWh, 0.1 kWh, or 1 kWh.