elausys INV-KNX Gateway for Fronius Inverters User Manual

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	Module status	Status code	1 byte	C R – T –	20.011	DPT_ErrorClass_System	Device status
2	Firmware version	Text String	14 bytes	C R – T –	16.000	Character string	Firmware version of the device
3	AC Current	Actual value	4 bytes	C R – T –	14.019	Electric current (A)	AC Total Current value
4	AC Current A	Actual value	4 bytes	C R – T –	14.019	Electric current (A)	AC Current phase A
5	AC Current B	Actual value	4 bytes	C R – T –	14.019	Electric current (A)	AC Current phase B
6	AC current C	Actual value	4 bytes	C R – T –	14.019	Electric current (A)	AC Current phase C
7	AC Voltage	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	AC Total Voltage
8	AC Voltage AB	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	AC Voltage Phase AB value
9	AC Voltage BC	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	AC Voltage Phase BC value
10	AC Voltage CA	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	AC Voltage Phase CA value
11	AC Voltage AN	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	AC Voltage Phase AN value
12	AC Voltage BN	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	AC Voltage Phase BN value
13	AC Voltage CN	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	AC Voltage Phase CN value
14	DC Current	Actual value	4 bytes	C R – T –	14.019	Electric current (A)	DC Total Current value
15	DC Voltage	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	DC Total Voltage
16	PV1 Voltage	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	PV1 Voltage
17	PV1 Current	Actual value	4 bytes	C R – T –	14.019	Electric current (A)	PV1 Current
18	PV2 Voltage	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	PV2 Voltage
19	PV2 Current	Actual value	4 bytes	C R – T –	14.019	Electric current (A)	PV2 Current
20	PV3 Voltage	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	PV3 Voltage
21	PV3 Current	Actual value	4 bytes	C R – T –	14.019	Electric current (A)	PV3 Current
22	PV4 Voltage	Actual value	4 bytes	C R – T –	14.027	Electric potential (V)	PV4 Voltage
23	PV4 Current	Actual value	4 bytes	C R – T –	14.019	Electric current (A)	PV4 Current
24	AC Power	Actual value	4 bytes	C R – T –	14.056	Power (W)	AC Power
25	DC Power	Actual value	4 bytes	C R – T –	14.056	Power (W)	DC Power
26	AC Frequency	Actual value	4 bytes	C R – T –	14.033	Frequency (Hz)	AC Frequency
27	AC VA	Actual value	4 bytes	C R – T –	14.056	Power (W)	AC Apparent power
28	AC VAR	Actual value	4 bytes	C R – T –	14.056	Power (W)	AC Reactive power
29	AC PF	Actual value	4 bytes	C R – T –	14.057	Power factor (cos phi)	Power factor
30	AC Energy	Actual value	4 bytes	C R – T –	13.013	Active energy (kWh)	Total AC Energy
31	Efficiency	Actual value	2 bytes	C R – T –	8.010	Percentage (%)	Inverter efficiency
32	Insulation	Actual value	4 bytes	C R – T –	14.056	Resistance (Ohm)	Insulation resistance
33	Temperature	Actual value	2 bytes	C R – T –	9.001	Temperature (°C)	Cabinet temperature
40	Daily Energy Yield	Actual value	4 bytes	C R – T –	13.013	Energy (kWh)
41	Battery 1 Running Status	Actual value	2 bytes	C R – T –	–	–	Status code
42	Battery 1 power	Actual value	4 bytes	C R – T –	14.056	Power (W)
43	Battery 1 SOC	Actual value	1 byte	C R – T –	5.001	Percentage (%)	State of charge (%)
44	Battery 1 current day charge	Actual value	4 bytes	C R – T –	13.013	Energy (kWh)
45	Battery 1 current day discharge	Actual value	4 bytes	C R – T –	13.013	Energy (kWh)
46	Battery 1 total charge	Actual value	4 bytes	C R – T –	13.013	Energy (kWh)
47	Battery 1 total discharge	Actual value	4 bytes	C R – T –	13.013	Energy (kWh)
48	Battery 2 Running Status	Actual value	2 bytes	C R – T –	–	–	Status code
49	Battery 2 power	Actual value	4 bytes	C R – T –	14.056	Power (W)
50	Battery 2 SOC	Actual value	1 byte	C R – T –	5.001	Percentage (%)	State of charge (%)
51	Battery 2 current day charge	Actual value	4 bytes	C R – T –	13.013	Energy (kWh)
52	Battery 2 current day discharge	Actual value	4 bytes	C R – T –	13.013	Energy (kWh)
53	Battery 2 total charge	Actual value	4 bytes	C R – T –	13.013	Energy (kWh)
54	Battery 2 total discharge	Actual value	4 bytes	C R – T –	13.013	Energy (kWh)
55	Powermeter	Actual value	4 bytes	C R – T –	14.056	Power (W)

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.

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.

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.

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).

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

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.

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.

8. DATASHEET

TECHNICAL DATA	VALUE
Auxiliary power supply terminal	Screw terminal 12-30VDC / GND
Power consumption KNX bus typ.	< 16 mA @ 29VDC
Operating temperature	+5°C to + 45°C
Enclosure Dimensions (Space Units)	2 SU
Mounting	DIN RAIL
KNX terminal	Pluggable micro terminal, Red/Black, 4 pole PUSH WIRE for solid conductor wire 0.6-0.8 mm²
KNX bus voltage	29 VDC

This document cannot be reproduced fully or partially without written authorization

Documents / Resources

elausys INV-KNX Gateway for Fronius Inverters [pdf] User Manual
INV-KNX Gateway for Fronius Inverters, INV-KNX, Gateway for Fronius Inverters, Fronius Inverters, Inverters

References

User Manual

ELAUSYS
INV-KNX

KNX Gateway for Fronius Inverters

User Manual

1. INTRODUCTION