elausys INV-KNX Gateway for Fronius Inverters User Manual

: June 15, 2024
: elausys

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User Manual

| Doc.Ref : INV-KNX-FR-UM
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KNX Gateway for Fronius Inverters

| Revision : 2.00

ELAUSYS

INV-KNX

KNX Gateway for Fronius Inverters

User Manual

1. INTRODUCTION

The KNX gateway for Fronius inverters provides a simple solution to transfer all relevant data from the inverters to KNX.

It allows integrators to take advantage of a fully integrated solar panel inverter, the data can be used to optimize energy consumption, monitoring, trending or to trigger specific action in the KNX installation.

Main features:

KNX Interface for Fronius inverters serie
Monitoring of Energy, Power, current, voltage, frequency, temperature, …
Connected to the inverter over Ethernet
Galvanic insulation from the KNX bus
Configurable refresh rate of inverter data
DIN rail mounted
Auxiliary power supply 12-30VDC
KNX logic module including logic gates, sequences, triggers, math operation and weekly calendar events.

2. OVERVIEW

2.1 USAGE & LIMITATION

This gateway is intended to be used with an Fronius inverter compatible with the SMA SunSpec modbus interface definition. The inverter is connected to the ethernet network on the same router as the KNX gateway.

All Fronius inverters with SetApp configuration are SunSpec-supported. Fronius inverters with the LCD that have Firmware version 3.xxxx and above only are SunSpec-supported.

2.1 SOFTWARE

The KNX Interface is configured using the ETS tool, the free ETS Demo version can be downloaded from the website of KNX Association. The free version allows to configure up to 5 KNX modules in a project, the KNX gateway is only one module, all devices can be configured using this version.

2.2 CONNECTION DIAGRAM

The KNX bus is connected on the top side of the gateway.
An external power supply 12-30VDC is required and connected on the bottom side of the module, beside the RJ45 connector for the ethernet cable.

12-30VDC
RJ45 Ethernet

2.3 FRONT PANEL

The front panel is equipped with two green status LED:

Network: Physical connection to the ethernet network is established.
Connected: Communication with the inverter is established.

Button “P” : KNX Programming mode button
Red LED : KNX Programming status LED

3. PARAMETERS

The KNX interface parameters are defined in the “parameters” tab of the device, in the ETS project.

3.1 INVERTER SETTINGS

The following parameters are defined in the inverter settings section of the parameters:

PARAMETER

| VALUES|

DESCRIPTION

---|---|---
AC Network|

Single phase (default)
Tri-Phase

| Type of AC network
Number of PV Circuits|

1 … 4

| NOT APPLICABLE for this type of inverters
Inverter model|

0…255

| 3 = Fronius Inverters
Refresh rate (min)|

0…255

| Cyclic rate of data polling from the inverter.
Battery 1|

Not Used / Used

| Display group objects to monitor the status of battery 1
Battery 2|

Not Used / Used

| Display group objects to monitor the status of battery 2 (NOT USED for this inverter)
Powermeter|

Not Used / Used

| Display group objects to monitor the powermeter value (NOT USED for this inverter)
Timezone|

UTC-11… UTC+14

| Timezone where the device is installed. It is used for logic functions based on the weekly calendar.
Daylight saving time|

Not Used / Used

| Set if daylight saving is used where the device is installed. It is used for logic functions based on the weekly calendar.
Device Options|

Text string

| Device options are not available on this device.

4. LOGIC FUNCTIONS

The KNX logic module is a virtual extension module that is part of the ETS application on the inverters gateways. Each logic module includes 8 logic functions including logic gates, sequences, triggers, math operation and weekly calendar events.

Up to 64 logic functions using extension modules
Logic Gate with 8 inputs, configurable output delay and inversion
Sequence with 4 steps, configurable outputs delays and datatypes
Trigger with inputs logic, delays and weekly calendar events
Math operations with configurable objects type and delays

Refer to the KNX Logic Module manual for more details on each function.

5. COMMUNICATION OBJECTS

5.1 GENERAL

General communication objects of the device.

GO

| NAME| DESCRIPTION
---|---|---

1

| Module status| Sends 0 when the module is operating normally, sends an error code when applicable.

2

| Firmware version| Returns the firmware version of the device when the object is read.

5.2 INVERTERS OBJECTS

GO

| NAME| DESCRIPTION
---|---|---

3

| AC Current| AC Total Current value

4

| AC Current A| AC Current phase A

5

| AC Current B| AC Current phase B

6

| AC Current C| AC Current phase C

7

| AC Voltage| AC Total Voltage (NOT USED)

8

| AC Voltage AB| AC Voltage phase AB

9

| AC Voltage BC| AC Voltage phase BC

10

| AC Voltage CA| AC Voltage phase CA

11

| AC Voltage AN| AC Voltage phase AN

12

| AC Voltage BN| AC Voltage phase BN

13

| AC Voltage CN| AC Voltage phase CN

14

| DC Current| DC Total Current value (NOT USED)

15

| DC Voltage| DC Total Voltage (NOT USED)

16

| PV1 Voltage| PV1 Voltage

17

| PV1 Current| PV1 Current

18

| PV2 Voltage| PV2 Voltage

19

| PV2 Current| PV2 Current

20

| PV3 Voltage| PV3 Voltage (NOT USED)

21

| PV3 Current| PV3 Current (NOT USED)

22

| PV4 Voltage| PV4 Voltage (NOT USED)

23

| PV4 Current| PV4 Current (NOT USED)

24

| AC Power| AC Power

25

| DC Power| DC Power (NOT USED)

26

| AC Frequency| AC Frequency

27

| AC VA| AC Apparent power

28

| AC VAR| AC Reactive power

29

| AC PF| Power factor

30

| AC Energy| Total AC Energy

31

| Efficiency| Inverter efficiency (NOT USED)

32

| Insulation| Insulation resistance (NOT USED)

33

| Temperature| Cabinet temperature (NOT USED)

40

| Daily Energy Yield| (NOT USED)

41

| Battery 1 Running Status| 0: OFF
1: EMPTY
6: DISCHAGING
7: CHARGING
9: FULL
10: HOLDING
11: TESTING

42

| Battery 1 power| (NOT USED)

43

| Battery 1 SOC| Battery’s state of capacity

44

| Battery 1 current day charge| (NOT USED)

45

| Battery 1 current day discharge| (NOT USED)

46

| Battery 1 total charge| (NOT USED)

47

| Battery 1 total discharge| (NOT USED)

48

| Battery 2 Running Status| (NOT USED)

49

| Battery 2 power| (NOT USED)

50

| Battery 2 SOC| (NOT USED)

51

| Battery 2 current day charge| (NOT USED)

52

| Battery 2 current day discharge| (NOT USED)

53

| Battery 2 total charge| (NOT USED)

54

| Battery 2 total discharge| (NOT USED)

55

| Powermeter| (NOT USED)

5.3 GROUP OBJECT LIST

GO

| Name| Function| Size| Flags| Type ID| Type Name| Description
---|---|---|---|---|---|---|---

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

40

41

| Battery 1 Running Status| Actual value| 2 bytes| C R – T –| –| –| Status code

42

43

44

45

46

47

48

| Battery 2 Running Status| Actual value| 2 bytes| C R – T –| –| –| Status code

49

50

51

52

53

54

55

6. CONFIGURATION

6.1 NETWORK CONFIGURATION

By default, the IP address of the KNX gateway is set to 192.168.1.51
Using a laptop connected to the gateway, open a web browser and navigate to the IP address of the gateway.

elausys INV-KNX Gateway for Fronius Inverters - b1

Set a fixed IP address of your choice for the KNX gateway and configure the modbus TCP settings as below:

Mode : Connect
IP : IP Address of the inverter
Server Port : 502
Uni Id : 1

6.2 KNX PHYSICAL DEVICE

ELAUSYS devices are configured using the ETS tool. You should first download and install the free version of ETS tool before you continue.

The INV-KNX Interface must be assigned a physical address on the KNX network. Assign a free address to the module, in our example we choose 1.1.2.

6.3 ETS PARAMETERS

Once a KNX physical address is set, open the parameter tab to configure the interface.

elausys INV-KNX Gateway for Fronius Inverters - b3

Select the type of AC network (single phase or tri-phase).

Set the inverter model to 3 for Fronius inverters.

Choose the refresh rate (min) for the complete set of data.

Select if battery 1 is available on the inverter.

Device options should remain empty.

6.4 ETS GROUP OBJECTS

A group address (GA) must be assigned to each group object (GO) needed by the application.
Open the Group Objects tab of the device and assign a GA to the objects as needed.

elausys INV-KNX Gateway for Fronius Inverters - b4

When GO and parameters are all configured, download the KNX Interface application to the device. The first download requires to press the programming button on the device to set the device in KNX programming mode then perform a full download.

6.5 INVERTER CONFIGURATION

MODBUS over TCP Support
MODBUS TCP function- is disabled by default.

Install Fronius Datamanager (=> see the Fronius Datamanager operating instructions.)
Open Internet browser
Enter the following in the address field of the Internet browser:
– the IP address of the Fronius Datamanager (can be accessed via System Information)
– or host name and domain name of the Fronius Datamanager.
– The web interface’s start page is displayed.
Select the “Settings” section (1).
Open the “Modbus” section (2).

elausys INV-KNX Gateway for Fronius Inverters - b5

Select data export : tcp
Set modbus port : 502
Set Sunspec model type: int+SF

elausys INV-KNX Gateway for Fronius Inverters - b6

7. FIRMWARE VERSION

This user manual and related ETS application is valid for firmware versions V2.2.0.0 and above.
The firmware version can be read from the gateway webpage using a web browser.
It is displayed on the top right of the page.

elausys INV-KNX Gateway for Fronius Inverters - c1

In case an updated firmware would be available, the device can be updated from the FW Update page, the binary file should be selected before pressing the Update button.