De gateway verbindt, maar alle registerwaarden tonen NaN. Hoe kan dat?

SMA-apparaten retourneren NaN voor registers waarvan de data afkomstig is van de vermogenselektronica-CPU wanneer die CPU inactief is. Dit kan bij de Sunny Island voorkomen tijdens stand-by. Controleer eerst het system_state-register (30201) om te bevestigen dat de omvormer actief is, en herhaal daarna de uitlezing.

Ik ontvang Modbus-foutcode 11 op elk verzoek. Wat gaat er fout?

Foutcode 11 betekent dat het unit-ID in je verzoek niet overeenkomt met het geconfigureerde unit-ID op de omvormer. SMA gebruikt standaard unit-ID 3. Lees de ingestelde waarde uit via de communicatie-instellingen van de omvormer en pas het unit-ID in je ModbusCloud-portaalconfiguratie dienovereenkomstig aan.

Schrijven naar de vermogensregisters heeft geen effect. Wat is de oorzaak?

Vermogenssetpoints via Modbus werken alleen tijdens parallelle netwerking, niet in stand-alone of eilandmodus. Controleer via system_state of de omvormer in netparallelle werking staat. Bepaalde netbeheerparameters vereisen bovendien eerst Grid Guard-authenticatie via register 43090 voordat schrijfacties worden geaccepteerd.

Is het veilig om setpoints zoals set_active_power of min_soc-registers frequent te schrijven?

Wees voorzichtig met schrijfregisters. Vermogenssetpoints zoals set_active_power en set_reactive_power mogen cyclisch worden geschreven. Parameters zoals min_soc_power_on en min_soc_power_off worden echter opgeslagen in flashgeheugen: te frequent schrijven veroorzaakt flash-slijtage en kan de beschermingsdrempels van de accu beïnvloeden. Grid Guard-beschermde registers vereisen bovendien hernieuwde authenticatie na iedere herstart.

Gratis Modbus template SMA SunnyIsland

De SMA Sunny Island is een accu-omvormer voor off-grid en netback-up toepassingen in woon-, bedrijfs- en agrarische installaties. Dit Modbus TCP-template leest apparaatidentificatie, systeemstatus en foutcodes, en meet per fase AC-vermogen, reactief vermogen en netspanning op L1, L2 en L3. De accubewaking omvat laadtoestand, stroom, spanning, temperatuurextremen en cumulatieve laad- en ontlaadenergie. Via schrijfregisters stel je vermogenssetpoints, reactief vermogen, bedieningsmodus en SoC-drempelwaarden in. Met dit template beheer je de SMA Sunny Island direct vanuit je ModbusCloud-portal.

Registers (41)

35 lezen / 6 schrijven

Naam	Adres	Functie	Type	Eenheid	Toegang
device_class Numeric code identifying the SMA device class category.	30051	FC03	uint32		R
device_type Numeric code identifying the specific SMA device type.	30053	FC03	uint32		R
serial_number Factory serial number of the Sunny Island unit.	30057	FC03	uint32		R
software_package Installed firmware version, BCD-encoded in four bytes.	30059	FC03	uint32		R
waiting_time_until_feed_in Remaining countdown before the inverter resumes grid feed-in.	30199	FC03	uint32		R
system_state Current operating state code of the Sunny Island system.	30201	FC03	uint32		R
recommended_action Encoded code for the action recommended by the device.	30211	FC03	uint32		R
message Active event or status message code from the device.	30213	FC03	uint32		R
fault_correction_measure Encoded code indicating the suggested fault-correction step.	30215	FC03	uint32		R
max_apparent_power Rated maximum apparent power output of the inverter, watts.	30231	FC03	uint32	W	R
active_charge_energy Cumulative AC energy delivered to charge the battery, watt-hours.	30595	FC03	uint32	Wh	R
active_discharge_energy Cumulative AC energy drawn from the battery during discharge, watt-hours.	30597	FC03	uint32	Wh	R
active_power Total three-phase AC active power, positive when discharging.	30775	FC03	int32	W	R
active_power_l1 AC active power on phase L1, positive when discharging.	30777	FC03	int32	W	R
active_power_l2 AC active power on phase L2, positive when discharging.	30779	FC03	int32	W	R
active_power_l3 AC active power on phase L3, positive when discharging.	30781	FC03	int32	W	R
grid_voltage_l1 AC grid voltage on phase L1, volts.	30783	FC03	int32	V	R
grid_voltage_l2 AC grid voltage on phase L2, volts.	30785	FC03	int32	V	R
grid_voltage_l3 AC grid voltage on phase L3, volts.	30787	FC03	int32	V	R
frequency AC grid frequency, hertz, typically 50 or 60.	30803	FC03	uint32	Hz	R
reactive_power_l1 Reactive power on phase L1, VAr reported in watt register.	30807	FC03	int32	W	R
reactive_power_l2 Reactive power on phase L2, VAr reported in watt register.	30809	FC03	int32	W	R
reactive_power_l3 Reactive power on phase L3, VAr reported in watt register.	30811	FC03	int32	W	R
operating_mode_for_active_power_limitation Encoded mode controlling how active power limitation is applied.	30835	FC03	uint32		R
battery_current DC battery current, amperes, positive during discharge.	30843	FC03	int32	A	R
soc Battery state of charge, 0 to 100 percent.	30845	FC03	uint32	%	R
current_battery_capacity Present usable battery capacity as a coded value.	30847	FC03	int32		R
battery_temperature Battery temperature measured at the inverter, degrees Celsius.	30849	FC03	int32	°C	R
battery_voltage DC battery pack terminal voltage, volts.	30851	FC03	uint32	V	R
power_supply_status Encoded status of the inverter power-supply subsystem.	30877	FC03	uint32		R
lowest_measured_battery_temperature Minimum battery temperature recorded over device lifetime, degrees Celsius.	30997	FC03	int32	°C	R
highest_measured_battery_temperature Maximum battery temperature recorded over device lifetime, degrees Celsius.	30999	FC03	int32	°C	R
max_occurred_battery_voltage Peak DC battery voltage recorded over device lifetime, volts.	31001	FC03	int32	V	R
allowed_charge_power Maximum charge power currently permitted by battery management, watts.	40189	FC03	uint32	W	R
allowed_discharge_power Maximum discharge power currently permitted by battery management, watts.	40191	FC03	uint32	W	R
set_active_power Active power setpoint; positive to discharge, negative to charge, watts.	40149	FC16	int32	W	W
set_control_mode Control mode selector; defines how power setpoints are interpreted.	40151	FC16	uint32		W
set_reactive_power Reactive power setpoint for grid management services, VAr.	40153	FC16	int32	W	W
grid_guard_code SMA Grid Guard unlock code; write to enable protected parameter changes.	43090	FC16	uint32		W
min_soc_power_on Minimum state of charge required to power on the inverter.	40705	FC16	uint32		W
min_soc_power_off State of charge threshold at which the inverter shuts down.	40707	FC16	uint32		W