Finding EMU meters via mbus-tcp-scan-secondary

[KeelOli]

Dear community,

When I try to find EMU allrounder or professional electricity meter via the mbus-tcp-scan-secondary they don't appear, with serial I find them. Does anyone have an idea how that is possible?

Here link to the devices:
https://www.emuag.ch/en/products/energy-and-power-meter/

Thank you for your help!