elausys INV-KNX KNX Gateway for Solar Edge Inverters User Manual

ELAUSYS
INV-KNX
KNX Gateway for Solar Edge Inverters
User Manual

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INTRODUCTION

The KNX gateway for SolarEdge 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 SolarEdge 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

2.1 USAGE & LIMITATION
This gateway is intended to be used with an SolarEdge 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 SolarEdge inverters with SetApp configuration are SunSpec-supported.
SolarEdge inverters with the LCD that have Firmware version 3.xxxx and above only are SunSpecsupported.
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. 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

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 AC Network| VALUES
• Single phase (default)
• Tri-Phase| DESCRIPTION
Type of AC network
---|---|---
Number of PV Circuits| • 1 … 4| NOT APPLICABLE for this type of inverters
Inverter model| • 0…255| 2 = SolarEdge 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
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

5.1 GENERAL
General communication objects of the device.

error code when applicable.
2| Firmware version| Returns the firmware version of the device when the object is read.

5.2 INVERTERS OBJECTS

< 0: discharging
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| > 0: charging
< 0: discharging

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)|

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 (See note below)

NOTE: In some configuration (additional modbus devices on the inverter,..) the inverter Unit Id could be 2. Inverter configuration must be checked for correct ID.
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 2 for SolarEdge inverters.
Choose the refresh rate (min) for the complete set of data.
Select if a powermeter 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. When enabled, it supports TCP port 502 by default. Port number can be reconfigured.
SolarEdge Device Configuration – Using the Inverter/Commercial Gateway Display (LCD)
To setup MODBUS TCP:

• Select Communication -> LAN Conf -> Modbus TCP (the default port is 502).
• To modify the TCP port, select Modbus TCP -> TCP Port, set the port number and long-press Enter.

SolarEdge Device Configuration – Using SetApp
To setup MODBUS TCP:

• 1 Select Communication -> Modbus TCP -> Enable. A new Port menu is added to the screen (the default port is 1502)
• 2 To modify the TCP port, select Port, set the port number and tap Done.

The default device ID of the inverter connected to the Ethernet is 1.
The TCP server idle time is 2 minutes. In order to leave the connection open, the request should be made within 2 minutes. The connection can remain open without any MODBUS requests.

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

© ELAUSYS SPRL
Doc.Ref : INV-KNX-SE-UM
Revision: 2.02

References

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

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