manufacturer: fronius model: primo-4 device: primo-4 category: Altro protocol: modbus version: v1 firmware: null verification: IMPORTED isDemo: false source: title: fronius primo-4 — modbus-database (registers.json) url: https://www.aggsoft.com/serial-data-logger/tutorials/modbus-data-logging/fronius-primo-4.htm documentRef: null revision: null generatedAt: 2026-09-21T13:29:30.392Z registers: - address: "40069" addressNumeric: 68 signal: ac_current name: AC-Current description: AC-Current functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: A access: READ endianness: null group: null notes: null - address: "40071" addressNumeric: 70 signal: phase_a_current name: Phase-A-Current description: Phase-A-Current functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: A access: READ endianness: null group: null notes: null - address: "40073" addressNumeric: 72 signal: phase_b_current name: Phase-B-Current description: Phase-B-Current functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: A access: READ endianness: null group: null notes: null - address: "40075" addressNumeric: 74 signal: phase_c_current name: Phase-C-Current description: Phase-C-Current functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: A access: READ endianness: null group: null notes: null - address: "40077" addressNumeric: 76 signal: phase_voltage_ab name: Phase-Voltage-AB description: Phase-Voltage-AB functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: V access: READ endianness: null group: null notes: null - address: "40079" addressNumeric: 78 signal: phase_voltage_bc name: Phase-Voltage-BC description: Phase-Voltage-BC functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: V access: READ endianness: null group: null notes: null - address: "40081" addressNumeric: 80 signal: phase_voltage_ca name: Phase-Voltage-CA description: Phase-Voltage-CA functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: V access: READ endianness: null group: null notes: null - address: "40083" addressNumeric: 82 signal: phase_voltage_an name: Phase-Voltage-AN description: Phase-Voltage-AN functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: V access: READ endianness: null group: null notes: null - address: "40085" addressNumeric: 84 signal: phase_voltage_bn name: Phase-Voltage-BN description: Phase-Voltage-BN functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: V access: READ endianness: null group: null notes: null - address: "40087" addressNumeric: 86 signal: phase_voltage_cn name: Phase-Voltage-CN description: Phase-Voltage-CN functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: V access: READ endianness: null group: null notes: null - address: "40089" addressNumeric: 88 signal: ac_power name: AC-Power description: AC-Power functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: W access: READ endianness: null group: null notes: null - address: "40091" addressNumeric: 90 signal: line_frequency name: Line-Frequency description: Line-Frequency functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: Hz access: READ endianness: null group: null notes: null - address: "40093" addressNumeric: 92 signal: ac_apparent_power name: AC-Apparent-Power description: AC-Apparent-Power functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: VA access: READ endianness: null group: null notes: null - address: "40095" addressNumeric: 94 signal: ac_reactive_power name: AC-Reactive-Power description: AC-Reactive-Power functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: var access: READ endianness: null group: null notes: null - address: "40097" addressNumeric: 96 signal: ac_power_factor name: AC-Power-Factor description: AC-Power-Factor functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: Pct access: READ endianness: null group: null notes: null - address: "40099" addressNumeric: 98 signal: ac_energy name: AC-Energy description: AC-Energy functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: Wh access: READ endianness: null group: null notes: null - address: "40101" addressNumeric: 100 signal: dc_current name: DC-Current description: DC-Current functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: A access: READ endianness: null group: null notes: null - address: "40103" addressNumeric: 102 signal: dc_voltage name: DC-Voltage description: DC-Voltage functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: V access: READ endianness: null group: null notes: null - address: "40105" addressNumeric: 104 signal: dc_power name: DC-Power description: DC-Power functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: W access: READ endianness: null group: null notes: null - address: "40107" addressNumeric: 106 signal: cabinet_temperature name: Cabinet-Temperature description: Cabinet-Temperature functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: C access: READ endianness: null group: null notes: null - address: "40109" addressNumeric: 108 signal: heat_sink_temperature name: Heat-Sink-Temperature description: Heat-Sink-Temperature functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: C access: READ endianness: null group: null notes: null - address: "40111" addressNumeric: 110 signal: transformer_temperature name: Transformer-Temperature description: Transformer-Temperature functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: C access: READ endianness: null group: null notes: null - address: "40113" addressNumeric: 112 signal: other_temperature name: Other-Temperature description: Other-Temperature functionCode: 3 datatype: float32 length: 2 scale: 1 offset: 0 unit: C access: READ endianness: null group: null notes: null - address: "40115" addressNumeric: 114 signal: enumerated_value_operating_state name: Enumerated-value.--Operating-state description: Enumerated-value.--Operating-state functionCode: 3 datatype: uint16 length: 1 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40116" addressNumeric: 115 signal: vendor_specific_operating_state_code name: Vendor-specific-operating-state-code description: Vendor-specific-operating-state-code functionCode: 3 datatype: uint16 length: 1 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40117" addressNumeric: 116 signal: bitmask_value_event_fields name: Bitmask-value.-Event-fields description: Bitmask-value.-Event-fields functionCode: 3 datatype: uint32 length: 2 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40119" addressNumeric: 118 signal: reserved_for_future_use name: Reserved-for-future-use description: Reserved-for-future-use functionCode: 3 datatype: uint32 length: 2 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40121" addressNumeric: 120 signal: vendor_defined_events name: Vendor-defined-events description: Vendor-defined-events functionCode: 3 datatype: uint32 length: 2 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40123" addressNumeric: 122 signal: vendor_defined_events_40123 name: Vendor-defined-events description: Vendor-defined-events functionCode: 3 datatype: uint32 length: 2 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40125" addressNumeric: 124 signal: vendor_defined_events_40125 name: Vendor-defined-events description: Vendor-defined-events functionCode: 3 datatype: uint32 length: 2 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40127" addressNumeric: 126 signal: vendor_defined_events_40127 name: Vendor-defined-events description: Vendor-defined-events functionCode: 3 datatype: uint32 length: 2 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40131" addressNumeric: 130 signal: type_of_der_device_default_value_is_4_to_indicate_pv_device name: Type-of-DER-device.-Default-value-is-4-to-indicate-PV-device. description: Type-of-DER-device.-Default-value-is-4-to-indicate-PV-device. functionCode: 3 datatype: uint16 length: 1 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40132" addressNumeric: 131 signal: continuous_power_output_capability_of_the_inverter name: Continuous-power-output-capability-of-the-inverter. description: Continuous-power-output-capability-of-the-inverter. functionCode: 3 datatype: uint16 length: 1 scale: 1 offset: 0 unit: W access: READ endianness: null group: null notes: null - address: "40133" addressNumeric: 132 signal: scale_factor name: Scale-factor description: Scale-factor functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40134" addressNumeric: 133 signal: continuous_volt_ampere_capability_of_the_inverter name: Continuous-Volt-Ampere-capability-of-the-inverter. description: Continuous-Volt-Ampere-capability-of-the-inverter. functionCode: 3 datatype: uint16 length: 1 scale: 1 offset: 0 unit: VA access: READ endianness: null group: null notes: null - address: "40135" addressNumeric: 134 signal: scale_factor_40135 name: Scale-factor description: Scale-factor functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40136" addressNumeric: 135 signal: continuous_var_capability_of_the_inverter_in_quadrant_1 name: Continuous-VAR-capability-of-the-inverter-in-quadrant-1. description: Continuous-VAR-capability-of-the-inverter-in-quadrant-1. functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: var access: READ endianness: null group: null notes: null - address: "40137" addressNumeric: 136 signal: continuous_var_capability_of_the_inverter_in_quadrant_2 name: Continuous-VAR-capability-of-the-inverter-in-quadrant-2. description: Continuous-VAR-capability-of-the-inverter-in-quadrant-2. functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: var access: READ endianness: null group: null notes: null - address: "40138" addressNumeric: 137 signal: continuous_var_capability_of_the_inverter_in_quadrant_3 name: Continuous-VAR-capability-of-the-inverter-in-quadrant-3. description: Continuous-VAR-capability-of-the-inverter-in-quadrant-3. functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: var access: READ endianness: null group: null notes: null - address: "40139" addressNumeric: 138 signal: continuous_var_capability_of_the_inverter_in_quadrant_4 name: Continuous-VAR-capability-of-the-inverter-in-quadrant-4. description: Continuous-VAR-capability-of-the-inverter-in-quadrant-4. functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: var access: READ endianness: null group: null notes: null - address: "40140" addressNumeric: 139 signal: scale_factor_40140 name: Scale-factor description: Scale-factor functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40141" addressNumeric: 140 signal: maximum_rms_ac_current_level_capability_of_the_inverter name: Maximum-RMS-AC-current-level-capability-of-the-inverter. description: Maximum-RMS-AC-current-level-capability-of-the-inverter. functionCode: 3 datatype: uint16 length: 1 scale: 1 offset: 0 unit: A access: READ endianness: null group: null notes: null - address: "40142" addressNumeric: 141 signal: scale_factor_40142 name: Scale-factor description: Scale-factor functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40143" addressNumeric: 142 signal: minimum_power_factor_capability_of_the_inverter_in_quadrant_1 name: Minimum-power-factor-capability-of-the-inverter-in-quadrant-1. description: Minimum-power-factor-capability-of-the-inverter-in-quadrant-1. functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: cos() access: READ endianness: null group: null notes: null - address: "40144" addressNumeric: 143 signal: minimum_power_factor_capability_of_the_inverter_in_quadrant_2 name: Minimum-power-factor-capability-of-the-inverter-in-quadrant-2. description: Minimum-power-factor-capability-of-the-inverter-in-quadrant-2. functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: cos() access: READ endianness: null group: null notes: null - address: "40145" addressNumeric: 144 signal: minimum_power_factor_capability_of_the_inverter_in_quadrant_3 name: Minimum-power-factor-capability-of-the-inverter-in-quadrant-3. description: Minimum-power-factor-capability-of-the-inverter-in-quadrant-3. functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: cos() access: READ endianness: null group: null notes: null - address: "40146" addressNumeric: 145 signal: minimum_power_factor_capability_of_the_inverter_in_quadrant_4 name: Minimum-power-factor-capability-of-the-inverter-in-quadrant-4. description: Minimum-power-factor-capability-of-the-inverter-in-quadrant-4. functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: cos() access: READ endianness: null group: null notes: null - address: "40147" addressNumeric: 146 signal: scale_factor_40147 name: Scale-factor description: Scale-factor functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null - address: "40148" addressNumeric: 147 signal: nominal_energy_rating_of_storage_device name: Nominal-energy-rating-of-storage-device. description: Nominal-energy-rating-of-storage-device. functionCode: 3 datatype: uint16 length: 1 scale: 1 offset: 0 unit: Wh access: READ endianness: null group: null notes: null - address: "40149" addressNumeric: 148 signal: scale_factor_40149 name: Scale-factor description: Scale-factor functionCode: 3 datatype: int16 length: 1 scale: 1 offset: 0 unit: null access: READ endianness: null group: null notes: null