The current page does not exist in the target language.

Do you want to change the language and go to the home page or do you want to stay on the current page?

Change Language
SOLAR ENERGY
INSTALLERS & PARTNERS

Open interfaces

The networking of different products and systems is becoming increasingly important, as it opens up many opportunities for all sectors involved. In keeping with this trend, Fronius has created all the documentation needed to integrate Fronius products into third-party systems and are available to download on the following pages. Fronius inverters feature various open hardware and software interfaces.
Please choose your desired product.

Modbus TCP

Modbus SunSpec is an open, Modbus-based communication protocol that conforms to the SunSpec Alliance standard. The following Fronius products feature interfaces for use with Modbus SunSpec, which enables the easy integration of Fronius inverters into third-party systems via Modbus.

Modbus TCP (Ethernet) is available for the following products:
Fronius Datamanager Card 1.0, Card 2.0 or Box 2.0

Note: the scale factor for calculating the power specification via Modbus has been adjusted in Fronius Datamanager updates to software versions higher than 3.7.1-5. This scale factor is not specified by Fronius – it is stipulated in the SunSpec Alliance specifications. Until now this value has always been 0, but in the new software it is set to -2. This is to facilitate more precise setting of the power specification, in particular for larger systems. This scale factor is to be viewed as an exponent (i.e. the number and direction of comma shifts). A power specification of 100% with a factor of -2 would be written as follows: 10000x10^-2 = 100%. The Modbus value for 100% would therefore be 10,000. To retain compatibility with older Fronius software versions, it is recommended that the scale factor be read correctly via Modbus.

FOR FLOAT QUERY TYPE:

  • Register 40243 – WMaxLimPct – power specification value calculated using scale factor (see example above)
  • Register 40261 – WMaxLimPct_SF – the corresponding scale factor 

FOR INT+SF QUERY TYPE:

  • Register 40233 – WMaxLimPct – power specification value calculated using scale factor (see example above)
  • Register 40251 – WMaxLimPct_ SF – the corresponding scale factor
inverter Symo open interfaces

Fronius Datamanager Modbus TCP & RTU

Modbus Register - SunSpec Maps, State Codes and Events

Operating Instruction Fronius Datamanager 2.0

Contact Data

Contact Person

Country

inverter Symo open interfaces
The email was sent to: The verification email was sent again. You have reached the maximum number of emails.
inverter Symo open interfaces

In return for making our protected premium content available, you allow us to use your personal data (name, address, e-mail address, company) to send you newsletters by e-mail, so that we can inform you about the Fronius International GmbH product portfolio from our Fronius Solar Energy business unit (promotions, new offers, new programmes and training opportunities in the field of photovoltaics). 

Learn more here


We think you are located in a different country

The country currently selected is Fronius International. Would you like to stay on this page or do you want to switch to the local website?