elausys INV-KNX Gateway SMA Inverters
Product Information
Specifications
- Product: KNX Gateway for SMA Inverters
- Doc.Ref: INV-KNX-SMA-UM
- Revision: 2.01
- Page: 1 of 17
Introduction
The KNX gateway for SMA SUNNY BOY / SUNNY TRIPOWER 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.
Overview
Usage & Limitation
This gateway is intended to be used with an SMA 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.
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.
Parameters
Inverter Settings
To configure the settings of the inverter, refer to the user manual provided with the SMA inverter. The KNX gateway will transfer these settings to the KNX installation.
Logic Functions
The KNX gateway supports various logic functions to enable optimized energy consumption and automation. These functions can be configured using the ETS tool.
Communication Objects
General
The KNX gateway supports communication objects that allow for the transfer of data between the inverter and the KNX installation. These communication objects can be configured using the ETS tool.
Inverter Objects
The KNX gateway provides specific communication objects for the inverter, allowing for the transfer of inverter-related data such as power output, status, and fault codes.
Group Object List
The group object list contains all the communication objects available for configuration within the KNX installation. This list can be accessed and modified using the ETS tool.
Configuration
Network Configuration
To configure the network settings of the KNX gateway, refer to the user manual provided with the gateway. It will provide step-by-step instructions on how to connect the gateway to the ethernet network.
KNX Physical Device
The KNX physical device configuration is done using the ETS tool. Follow the instructions provided in the ETS tool documentation to configure the physical device settings.
INTRODUCTION
The KNX gateway for SMA SUNNY BOY / SUNNY TRIPOWER 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 SMA SUNNY BOY / SUNNY TRIPOWER 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.
OVERVIEW
USAGE & LIMITATION
This gateway is intended to be used with an SMA 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.
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.
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.
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
PARAMETERS
The KNX interface parameters are defined in the “parameters” tab of the device, in the ETS project.
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 | PV Circuits 1 or 2 applicable for this type of inverters |
| Inverter model | § 0…255 | 1 = SMA 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 power meter 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. |
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.
COMMUNICATION OBJECTS
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. |
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 (NOT USED) |
| 29 | AC PF | Power factor |
| 30 | AC Energy | Total AC Energy |
| 31 | Efficiency | Inverter efficiency (NOT USED) |
| 32 | Insulation | Insulation resistance |
| 33 | Temperature | Cabinet temperature |
| 40 | Daily Energy Yield | (NOT USED) |
|
41 |
Battery 1 Running Status |
0 = Off
6 = Discharging 7 = Charging 8 = Float charge |
| 42 | Battery 1 power | (NOT USED) |
| 43 | Battery 1 SOC | Battery state of charge |
| 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) |
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) |
CONFIGURATION
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: 126 (See note below)
NOTE: SMA Inverter Unit ID must be set to 3 on the inverter to be accessible using Unit id 126 on the gateway ! There is an offset of +123 from the ID set on the inverter.
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.
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 1 for SMA inverters
- Choose the refresh rate (min) for the complete set of data.
- Choose if battery 1 is available on the inverter.
- Device options should remain empty.
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.
INVERTER CONFIGURATION
- Start Sunny Explorer on the computer and create a Speedwire system (see Sunny Explorer user manual).
- Log into the Speedwire system as Installer.
- Select the SMA inverter to be configured in the system tree.
- Select the tab Settings.
- Select the parameter group External Communication.
- Select [Edit].
- You will see the categories TCP Server and UDP Server under the parameter group Modbus.
- To activate the TCP server, make the following settings in the group Modbus > TCP Server:
- In the Activated drop-down list, select the entry Yes.
- If necessary, change the port in the Port field (default setting: 502).
- Select [Save].
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.
DATASHEET
| TECHNICAL DATA | VALUE |
| Auxiliary power supply teminal | 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 |
Documents / Resources
 |
elausys INV-KNX Gateway SMA Inverters [pdf] User Manual INV-KNX Gateway SMA Inverters, INV-KNX, Gateway SMA Inverters, SMA Inverters, Inverters |
