elausys INV-KNX Gateway SMA Inverters User Manual

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:

§  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.

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

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

1.  Start Sunny Explorer on the computer and create a Speedwire system (see Sunny Explorer user manual).
2. Log into the Speedwire system as Installer.
3. Select the SMA inverter to be configured in the system tree.
4. Select the tab Settings.
5. Select the parameter group External Communication.
6.  Select [Edit].
7. You will see the categories TCP Server and UDP Server under the parameter group Modbus.
8. To activate the TCP server, make the following settings in the group Modbus > TCP Server:
9. In the Activated drop-down list, select the entry Yes.
10. If necessary, change the port in the Port field (default setting: 502).
11. 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

conductor wire 0.6-0.8 mm²
KNX bus voltage| 29 VDC

References

• Die von Ihnen aufgerufene Seite existiert nicht – KNX Association [Official website]

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