Primary address

The counters are addressed via the primary address. This can be set on the device, via the manufacturer’s software or with the FB_MBUS_ChangeAdr or FB_MBUS_General_Send block.

All M-Bus devices must have a unique address (0-255).

Address 0 - 250 Addresses of the devices

Address 251 Not used at present

Address 252 Not used at present

Address 253 Use of secondary addressing

Address 254 Send to all M-Bus devices with response (E5 hexadecimal). If several devices are connected, all of them will respond, leading to data collision. Therefore, this address should only be used if only one device is connected.

Address 255 Send to all M-Bus devices without response.