Configure the L1, L2 and L3 phases of a three-phase Chart’nX meter
Chart’nXAdministratorInstaller
Chart’nX: energy generator in a three-phase installation, main meter cards
In a three-phase installation, the Chart’nX energy generator can read a meter phase by phase: a KNX group address or a Modbus configuration for L1, L2 and L3, with a total measured separately or calculated from the phases. This setting does not change the physical wiring.
For installers or administrators in charge of the configuration.
Before you start
Section titled “Before you start”- Three-phase is chosen in Electrical system, in the general information of the dashboard.
- You know the measurement and the correct address of each phase.
Switch the card to per-phase measurement
Section titled “Switch the card to per-phase measurement”- In Main meters, enable the relevant card and choose the protocol according to the table below.
- In Measurement, select Per phase. The L1, L2 and L3 rows appear.
| Card | Phases | Total choice |
|---|---|---|
| General meters - Apparent power | KNX or Modbus | No: the total measurement is still required in addition to the phases |
| General meters - Total energy consumed | KNX or Modbus | Yes |
| PV meter and Grid meter | KNX or Modbus | Yes |
| Battery meter | KNX only | Yes; the dedicated total keeps the Group address label |
Ordinary energy submeters and the water generator do not offer this per-phase configuration block.
Fill in the address of each phase
Section titled “Fill in the address of each phase”- In KNX, fill in the address of each phase. The format has three levels: first number from 0 to 31, second from 0 to 7, third from 0 to 255. Fictitious example: 1/2/3.
- In Modbus, choose for each phase the matching configuration from the catalog. The U identifiers and R registers help to recognize the configurations.
- To add an old KNX address to a phase, click its small clock button with +, tooltip Add historical address, then fill in the new Historical row. An added historical row must be filled in; its cross removes it.
Choose the total and save
Section titled “Choose the total and save”- If Total is offered, choose Dedicated address for a total measurement provided separately by the meter, or Sum L1+L2+L3 to calculate the total from the phases. The sum hides the total measurement field.
- With Dedicated address, also fill in Measured total address. The General meters - Apparent power card keeps this total measurement in addition to the phases and does not offer the sum.
- Check the units and the Index or Not indexed mode according to the meter fields. In Per phase mode, the meter unit applies to the L1, L2, L3 addresses and to the total.
- Save the dashboard.
Return to the total measurement
Section titled “Return to the total measurement”Total returns to the overall measurement. Per-phase configuration preserved indicates that the phase addresses remain stored while their view is inactive: reread them when you reactivate Per phase. After a protocol change, check all the fields, as the same values are not necessarily kept.
Check the result
Section titled “Check the result”After saving, open the per-phase panels and compare each phase with the measurement expected on the installation. If a phase stays empty or inconsistent, reread its address and the meter unit.
Troubleshooting
Section titled “Troubleshooting”- A warning symbol next to a KNX phase, with the tooltip Address already used by another phase or as historical, flags an address conflict to examine. It does not prevent saving: check the match with the installation before changing an address. Do not replace an address with a fictitious value to make the warning disappear.
- The Measurement choice is missing: check the installation type, the card and the protocol.
For other symptoms, follow the meter troubleshooting. If the flow is still different, contact support@can-nx.com with the card, the protocol and the installation type.