Introduction - Circutor CDP Application Notes

1.- INTRODUCTION

Fronius offers several inverter models that can be managed via the CDP Dynamic
power controller.
For the CDP controller to be able to correctly manage the inverter, communication
between the two devices must be correct and both products must be correctly
programmed.
These application notes are not meant as a substitute for the CDP or
inverter manuals, but rather as additional support for individuals who
need to interconnect the two devices.
However, the guides and manuals of each product are the documents to be
consulted and each company will provide the respective technical assistance.
In these application notes, we will work with five different Fronius models:
1. Fronius Galvo WLAN (single-phase)
2. Fronius IG Plus with MODBUS CARD (single-phase or three-phase)
3. Fronius Symo WLAN (three-phase)
4. Fronius ECO WLAN (three-phase)
5. Fronius Primo WLAN (single-phase)
The CDP stores the nominal power value of the inverter to be controlled in its
configuration and periodically sends the inverter the percentage of said power to
be generated. Consequently, when the CDP communicates with the Fronius
inverter it is constantly sending it a regulation percentage.
Some models do not accept a regulation that is less than 10% of the nominal
power, and thus if consumption is below this threshold the inverter will not inject
any power into the mains even during periods of maximum insolation.
Consequently, it is advisable to consult this data in the inverter manual in
order to clarify any doubts.
6 Application notes
CDP