M-Bus gateway failures

Gateway does not find all meters

Many M-Bus meters get their power from the gateway. Our gateway supports 50 standard loads. 

• Start another search 1-2 times. It is possible that the meter does not always respond to the first search.

• Check that the sum of the loads does not exceed 50.

• If the lines are too long or the meters are too thin, the lines will become shorted.

• Not every M-Bus meter is compatible with our gateway. The list of compatible meters can be found on the M-Bus Gateway product page.

Gateway finds more meters than have been installed

• Mostly during commissioning: Depending on the M-Bus meter, it can create several sub-counters. These can be recognised by the serial number being shifted one place to the left, followed by an increasing number. Starting with 1. ex: Main counter 00200001, Sub-counter 02000011

• Mostly during operation: An unstable connection can lead to faulty transmission of the serial number. 

  • These counters can be deactivated to prevent them from obtaining a licence.

• Mostly during operation: a counter with 100000kW appears

  • Some manufacturers send this value when the counter has an error.

M-Bus meter is offline

• Meters fail irregularly, they are not always the same meters. 

  • The meters need about 10 seconds to respond. If the readout interval is set too low, they have no possibility to do so. 

    • Solution: The readout interval can be increased on the M-Bus gateway. Recommended is 10 seconds per device.

• Meters always lose the connection at the same time of day (hour and minute).

  • In this case, it may be that meters are battery-supported and only allow a certain number of readouts per day to conserve the battery. 

    • Solution: In this case, the reading interval can be increased to 6 or 12 hours.

• Meters fail irregularly, most of them are the same meters.

  • External disturbances on the lines, especially longer ones, can lead to faulty transmissions.

    • Solution: Keep meter wiring short.

Meter values do not match physical meter

• Check the meter configuration.

• Check the wiring between the meter and the gateway.

• Not every M-Bus meter is compatible with our gateway. The list of compatible meters can be found on the M-Bus Gateway product page.

Replace M-Bus gateway

• Install a new M-Bus gateway and place the contract on the new gateway.

• Put the M-Bus into operation.

• Set the readout interval on the portal.

• Search for devices.

• Check whether all M-Bus meters have delivered current values.

Note: Nothing needs to be changed in the smart-me configuration or in billing for the existing M-Bus meters.