https://github.com/otti/froniusmodbusrtu

Register map of Fronius Modbus RTU devices
https://github.com/otti/froniusmodbusrtu

fronius modbus modbus-rtu sniffing

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Register map of Fronius Modbus RTU devices

• Host: GitHub
• URL: https://github.com/otti/froniusmodbusrtu
• Owner: otti
• Created: 2023-03-01T08:33:44.000Z (about 2 years ago)
• Default Branch: main
• Last Pushed: 2023-10-10T17:26:40.000Z (over 1 year ago)
• Last Synced: 2025-02-03T01:08:31.722Z (4 months ago)
• Topics: fronius, modbus, modbus-rtu, sniffing
• Homepage:
• Size: 10.7 KB
• Stars: 7
• Watchers: 1
• Forks: 4
• Open Issues: 1
• Metadata Files:
  • Readme: README.md

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README

        
# Communication between Fronius Symo GEN24 10.0 Plus and Fronius Smart meter TS 65A-3

Every value is stored in two registers with 16 bit each. These two registers will be combined to one 32 bit value.

The low word is stored at the lower address.

This 32 bit value will be interpreded as singned 32 bit integer.

## Read holding register for device ID 1 , Start address = 258 Quantity = 16

Every second  

   

      Reg

      Description

      Unit

   

   

      258..259

      Voltage

      0.1 V

   

   

      260..261

      Voltage Phase Phase

      0.1 V

   

   

      262..263

      PowerReal_P_Sum 

      0.1 W

   

   

      264..265

      PowerApparent_S_Sum

      0.1 VA

   

   

      266..267

      PowerReactive_Q_Sum

      0.1 var

   

   

      268..269

      PowerFactor_Sum 

      0.001 °

   

   

      270..271

      PowerReal_P_Sum OR PowerFactor_Sum OR Current_AC_Sum???

      

   

   

      272..273

      Frequency

      0.1 Hz

   

  

  

## Read holding register for device ID 1 , Start address = 286 Quantity = 42

Every second  

   

      Reg

      Description

      Unit

   

   

   

      Phase 1

   

   

      286..287

      Voltage_AC_PhaseToPhase_12

      0.1 V

   

   

      288..289

      Voltage_AC_Phase_1

      0.1 V

   

   

      290..291

      Current_AC_Phase_1

      mA

   

   

      292..293

      PowerReal_P_Phase_1

      0.1 W

   

   

      294..295

      PowerApparent_S_Phase_1

      0.1 VA

   

   

      296..297

      PowerReactive_Q_Phase_1

      0.1 var

   

   

      298..299

      PowerFactor_Phase_1

      0.001

   

   

   

      Phase 2

   

   

      300..301

      Voltage_AC_PhaseToPhase_23

      0.1 V

   

   

      302..303

      Voltage_AC_Phase_2

      0.1 V

   

   

      304..305

      Current_AC_Phase_2

      mA

   

   

      306..307

      PowerReal_P_Phase_2

      0.1 W

   

   

      308..309

      PowerApparent_S_Phase_2

      0.1 VA

   

   

      310..311

      PowerReactive_Q_Phase_2

      0.1 var

   

   

      312..313

      PowerFactor_Phase_2

      0.001

   

   

   

      Phase 3

   

   

      314..315

      Voltage_AC_PhaseToPhase_31

      0.1 V

   

   

      316..317

      Voltage_AC_Phase_3

      0.1 V

   

   

      318..319

      Current_AC_Phase_3

      mA

   

   

      320..321

      PowerReal_P_Phase_3

      0.1 W

   

   

      322..323

      PowerApparent_S_Phase_3

      0.1 VA

   

   

      324..325

      PowerReactive_Q_Phase_3

      0.1 var

   

   

      326..327

      PowerFactor_Phase_3

      0.001

   

## Read holding register for device ID 1 , Start address = 1024 Quantity = 16

Every 10 seconds  

Every energy value is stored in four registers.  

Example for EnergyReactive_VArAC_Sum_Produced:  

For example the actual energy value is 463941 Wh. The kilowatt hours (463) are stored in register 1036..1037. The watt hours (941) are stored in register 1038..1039. 

To get the total energy in Wh multiply register 1036..1037 by 1000 and add register 1038..1039 to it.

   

      Reg

      Description

      Unit

   

   

      1024..1025

      EnergyReal_WAC_Plus_Absolute,  EnergyReal_WAC_Sum_Consumed

      kWh

   

   

      1026..1027

      EnergyReal_WAC_Plus_Absolute,  EnergyReal_WAC_Sum_Consumed

      Wh

   

   

      1028..1029

      EnergyReactive_VArAC_Sum_Consumed

      kvarh

   

   

      1030..1031

      EnergyReactive_VArAC_Sum_Consumed

      varh

   

   

      1032..1033

      EnergyReal_WAC_Minus_Absolute, EnergyReal_WAC_Sum_Produced 

      kWh

   

   

      1034..1035

      EnergyReal_WAC_Minus_Absolute, EnergyReal_WAC_Sum_Produced 

      Wh

   

   

      1036..1037

      EnergyReactive_VArAC_Sum_Produced

      kvarh

   

   

      1038..1039

      EnergyReactive_VArAC_Sum_Produced

      varh

   

## Test conditions

### Inverter

Fronius Symo GEN24 10.0 Plus  

SW: 1.19.7-1 on 2023-02-28  

### Smart Meter

Fronius TS 65A-3