Reads Austrian smart meter data via Modbus TCP interface.
Overview
The CByte SMARTI is a Modbus TCP interface that reads data from Austrian EVU smart meters (KAIFA 309). This template provides grid voltage, current, power, energy, and power factor readings from supported utility meters across multiple Austrian providers.
Key readings
Grid voltage L1 to L3
Grid current L1 to L3
Grid power import
Grid power export
Grid active energy import/export
Grid power factor
Use cases
Monitor real-time grid import and export power to track household energy balance on a cloud dashboard.
Log active energy import and export over time to verify utility billing for Austrian EVU customers.
Create alerts when grid voltage on any phase falls outside acceptable limits for more than five minutes.
Visualize three-phase current distribution to detect load imbalances in commercial installations.
Combine smart meter data with PV inverter readings to calculate self-consumption ratios remotely.
Track power factor readings to identify potential reactive power issues in small commercial buildings.
Installation
1Connect the CByte SMARTI to the customer interface port on the KAIFA 309 smart meter as described in the SMARTI installation manual.
2Connect the CByte SMARTI to your local network via Ethernet and assign a static IP address or use DHCP reservation.
3Connect the ModbusCloud gateway (MCG or MLP series) to the same local network as the CByte SMARTI.
4In the ModbusCloud portal, add a new Modbus TCP device using the SMARTI's IP address and the correct unit ID.
5Import the CByte SMARTI template from the ModbusCloud template library and assign it to the configured device.
6Verify that all readings, especially the uint32 energy registers spanning two consecutive addresses, display plausible values on the dashboard.
Things to watch for
01
Why do my energy readings show incorrect or extremely large values?
The active and reactive energy registers use uint32 data spanning two consecutive Modbus addresses. Ensure the register pairing and byte/word order are configured correctly in the template. Swapping the high and low words will produce unrealistic values.
02
Which Austrian smart meters are supported by the CByte SMARTI?
The CByte SMARTI supports the KAIFA 309 meter deployed by Illwerke VKW, IKB, TIWAG, Salzburg, and EVN. Other meter types or providers are not confirmed to work.
03
The gateway cannot connect to the CByte SMARTI over Modbus TCP. What should I check?
Verify that the SMARTI and the ModbusCloud gateway are on the same network or VLAN. Confirm the IP address and Modbus TCP port (default 502) are correct. Check that no firewall rules are blocking traffic between the two devices.
04
Do I need to enable the customer interface on the smart meter before using the SMARTI?
Yes. In Austria, the customer interface on EVU smart meters may need to be activated by your energy provider. Contact your utility company to request activation before installing the CByte SMARTI.
Registers (14)
14 read / 0 write
Name
Address
Function
Type
Unit
Access
Grid voltage L1
1.0.32.7
1001
FC03
uint16
V
R
Grid voltage L2
1.0.52.7
1002
FC03
uint16
V
R
Grid voltage L3
1.0.72.7
1003
FC03
uint16
V
R
Grid current L1
1.0.31.7
1004
FC03
uint16
A
R
Grid current L2
1.0.51.7
1005
FC03
uint16
A
R
Grid current L3
1.0.72.7
1006
FC03
uint16
A
R
Grid power import
1.0.1.7
1007
FC03
uint16
kW
R
Grid power export
1.0.2.7
1008
FC03
uint16
kW
R
Grid active energy import
1.0.1.8
1009
FC03
uint32
kWh
R
Grid active energy export
1.0.2.8
1011
FC03
uint32
kWh
R
Grid reactive energy import
1.0.3.8
1013
FC03
uint32
kWh
R
Grid reactive energy export
1.0.4.8
1015
FC03
uint32
kWh
R
TimeStamp
0.0.1.0
1017
FC03
uint32
R
Grid powerfactor
0.1.13.7
1019
FC03
uint16
R
Working with Modbus in your projects?
ModbusCloud is the hardware-plus-software platform that installers use to monitor, visualise and control Modbus devices from one portal. This template is one of hundreds you can use right away.
