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© Danfoss | 2021.10AQ39012919462001en-010101 | 1

SonoMeter 40

Wired M-Bus protocol description

Operating guide

Table of Contents1. General structure of protocol ................................................................................................2

1.1. General features of protocol ........................................................................................................................2

1.2. Data strings ........................................................................................................................................................2

2. Selection of the data type ......................................................................................................3

2.1. Selection of the data type “All data” .........................................................................................................3

2.2. Selection of the data type “User data” .....................................................................................................3

2.3. Selection of the data type “Simple billing” (Years logger) ...............................................................3

2.4. Selection of the data type “Enhanced billing” (Days logger) ..........................................................3

2.5. Selection of the data type “Multi tariff billing” (Months logger) ...................................................3

2.6. Selection of the data type “Instantaneous values” .............................................................................3

2.7. Selection of the data type “Load management values for management” (Hours logger) ..3

2.8. Selection of the data type “Installation and startup” .........................................................................3

2.9. Selection of the data type “Testing” .........................................................................................................4

2.10. Parameter list for preselecting ....................................................................................................................4

3. Data request ............................................................................................................................4

3.1. Data request ..............................................................................................................................................................4

3.2. Meter data coding ..................................................................................................................................................5

3.3. CRC16 checksum calculation algorithm .........................................................................................................10

4. Settings the parameters of meter ........................................................................................11

4.1. Changing the identification number ...............................................................................................................11

4.2. Changing the identification number, Manufacturer ID and Medium .................................................11

4.3. Changing the primary address ..........................................................................................................................11

4.4. Changing the data and time of the meter .....................................................................................................11

4.5. Changing the yearly set day ...............................................................................................................................11

4.6. Changing the monthly set day ..........................................................................................................................11

4.7. Changing the baud rate ........................................................................................................................................11

5. Secondary addressing ............................................................................................................12

5.1. Selecting of the meter ...................................................................................................................................12

5.2. Communication with selected meter ......................................................................................................12

5.3. Deselection of secondary addressing mode .........................................................................................12

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