Fronius Smart Meter WR Operating instructions

Warnings are intended to warn people of possible injuries and to avoid personal injury and damage to the product. They relate to individual actions with and on the product.

DANGER!

Indicates an immediately dangerous situation.

Serious injury or death will result if the danger is not avoided.

Action step to escape the situation.

WARNING!

Indicates a potentially dangerous situation.

Serious injury or death may result if the danger is not avoided.

Action step to escape the situation.

CAUTION!

Indicates a potentially dangerous situation.

Minor or moderate injury may result if the danger is not avoided.

Action step to escape the situation.

NOTE!

Indicates a situation that may result in property damage.

If the situation is not avoided, impaired work results, material damage to the product or other property are the possible consequences.

Action step to avoid the situation.

Safety instructions are designed to ensure safe product use. They are preventive and help to inform users about the fundamental risks involved when dealing with the product. They do not refer specifically to individual actions with and on the product.

Warnings are intended to warn people of possible injuries and to avoid personal injury and damage to the product. They relate to individual actions with and on the product.

DANGER!

Indicates an immediately dangerous situation.

Serious injury or death will result if the danger is not avoided.

Action step to escape the situation.

WARNING!

Indicates a potentially dangerous situation.

Serious injury or death may result if the danger is not avoided.

Action step to escape the situation.

CAUTION!

Indicates a potentially dangerous situation.

Minor or moderate injury may result if the danger is not avoided.

Action step to escape the situation.

NOTE!

Indicates a situation that may result in property damage.

If the situation is not avoided, impaired work results, material damage to the product or other property are the possible consequences.

Action step to avoid the situation.

Safety instructions are designed to ensure safe product use. They are preventive and help to inform users about the fundamental risks involved when dealing with the product. They do not refer specifically to individual actions with and on the product.

Warnings are intended to warn people of possible injuries and to avoid personal injury and damage to the product. They relate to individual actions with and on the product.

DANGER!

Indicates an immediately dangerous situation.

Serious injury or death will result if the danger is not avoided.

Action step to escape the situation.

WARNING!

Indicates a potentially dangerous situation.

Serious injury or death may result if the danger is not avoided.

Action step to escape the situation.

CAUTION!

Indicates a potentially dangerous situation.

Minor or moderate injury may result if the danger is not avoided.

Action step to escape the situation.

NOTE!

Indicates a situation that may result in property damage.

If the situation is not avoided, impaired work results, material damage to the product or other property are the possible consequences.

Action step to avoid the situation.

Safety instructions are designed to ensure safe product use. They are preventive and help to inform users about the fundamental risks involved when dealing with the product. They do not refer specifically to individual actions with and on the product.

The device has been manufactured in line with the state of the art and according to recognized safety standards.

WARNING!

Incorrect operation or misuse

Serious to fatal injuries to the operator or third parties as well as damage to the device and other property of the operator may result.

All persons involved in the commissioning, maintenance, and servicing of the device must be appropriately qualified and have knowledge of working with electrical installations.

Read these operating instructions in full and follow them carefully and precisely.

The operating instructions must always be kept to hand wherever the device is being used.

IMPORTANT!
In addition to the operating instructions, observe the following general and local rules:

Accident prevention
Fire protection
Environmental protection

IMPORTANT!
Labels, warning notices, and safety symbols are located on the device. A description can be found in these operating instructions.

IMPORTANT!

All safety and danger notices on the device:

Must be kept in a legible state
Must not be damaged/marked
Must not be removed
Must not be covered, have anything stuck on them, or painted over

WARNING!

Tampered-with and non-functioning protection devices

Serious to fatal injuries as well as damage to the device and other property of the operator may result.

Never bypass or disable protection devices.

Any protection devices that are not fully functional must be repaired by an authorized specialist before the device is switched on.

WARNING!

Loose, damaged, or under-dimensioned cables

An electric shock can be fatal.

Use undamaged, insulated, and adequately dimensioned cables.

Fasten the cables according to the specifications in the operating instructions.

Loose, damaged, or under-dimensioned cables must be repaired or replaced immediately by an authorized specialist.

NOTE!

Installations or modifications to the device

The device may be damaged

Do not carry out any alterations, installations, or modifications to the device without first obtaining the manufacturer's permission.

Damaged components must be replaced.

Only use original spare parts.

The device has been manufactured using state-of-the-art technology and according to recognized safety standards. If used incorrectly or misused, however, it can cause

serious or fatal injury to the operator or a third party,
and damage to the device and other material assets belonging to the operating company.

All persons involved in start-up operation, maintenance and servicing of the device must

be suitably qualified,
have knowledge of and experience in dealing with electrical installations and
have fully read and precisely followed these Operating Instructions.

The Operating Instructions must always be kept on hand wherever the device is being used. In addition to the Operating Instructions, all applicable local rules and regulations regarding accident prevention and environmental protection must also be followed.

All safety and danger notices on the device

must be kept in a legible state
must not be damaged/marked
must not be removed
must not be covered, pasted, or painted over.

The terminals can reach high temperatures.

Only operate the device when all protection devices are fully functional. If the protection devices are not fully functional, there is a risk of

serious or fatal injury to the operator or a third party,
and damage to the device and other material assets belonging to the operating company.

Any safety devices that are not functioning properly must be repaired by an authorized specialist before the device is switched on.

Never bypass or disable protection devices.

For the location of the safety and danger notices on the device, refer to the section headed “General” in the Operating Instructions for the device.

Any equipment malfunctions which might impair safety must be remedied immediately before the device is turned on.

Your personal safety is at stake!

Operation or storage of the machine outside the stipulated area will be deemed as not in accordance with the intended purpose.

For exact information on permitted environmental conditions, please refer to the technical data.

Safety symbols:
	To avoid electric shocks: Do not dismantle or modify the device Do not allow any water to enter the device Do not allow any foreign substances or material to enter the device Do not touch any connections directly
	RCM Symbol - The product complies with the Australian laws.

Safety symbols:
	To avoid electric shocks: Do not dismantle or modify the device Do not allow any water to enter the device Do not allow any foreign substances or material to enter the device Do not touch any connections directly
	RCM Symbol - The product complies with the Australian laws.

The conventions regarding how information is presented in the document, which are set out below, have been defined in order to increase the readability and comprehensibility of the document.

Application notes

IMPORTANT! Indicates application notes and other useful information. It does not indicate a harmful or dangerous situation.

Software

Software functions and elements of a graphical user interface (e.g., buttons, menu items) are highlighted in the text with this mark up.

Example: Click Save.

Instructions for action

1Action steps are displayed with consecutive numbering.

✓This symbol indicates the result of the action step or the entire instruction.

This document provides detailed information and instructions to ensure that people can use the machine safely and efficiently.

The information is intended for the following groups of people:

Technical specialists: People with appropriate qualifications and fundamental knowledge of electronics and mechanics. The activities of a technical specialist include installation, operation, maintenance, and service work.
User: People that use the machine in daily operation and want to understand its basic functions.

Regardless of any qualifications, only perform the activities listed in this document.

The definition of professional qualifications and their applicability are subject to national law.

With regard to data security, the user is responsible for:

Backing up any changes made to the factory settings
Saving and storing personal settings

NOTE!

Data security for network and Internet connection

Unsecured networks and a lack of safeguards can result in data loss and unauthorized access. Observe the following points for safe operation:

Operate inverters and system components on a private, secure network. A WiFi network is considered secure if security standard WPA 2 is satisfied as a minimum.

Keep the network devices (e.g., WiFi routers) up to date with the latest technology.

Keep the software and/or firmware updated.

Use a wired network to ensure a stable data connection.

For security reasons, do not make inverters and system components accessible from the Internet via port forwarding or Port Address Translation (PAT).

Use the solutions provided by Fronius for monitoring and remote configuration.

The optional communication protocol Modbus TCP/IP¹⁾ is an unsecured interface. Only use Modbus TCP/IP if no other secured data communication protocol (MQTT²⁾) is possible (e.g., compatibility with older Smart Meters).

¹⁾ TCP/IP - Transmission Control Protocol/Internet Protocol
²⁾ MQTT - Message Queuing Telemetry Protocol

When you connect your device (and any associated devices) to the internet, the following device and operating data (device ID/identifier, device IP address, device time, configuration settings, hardware and software information, device status log files, serial number) is sent automatically to

Fronius International GmbH, Froniusstraße 1, 4643 Pettenbach, Austria, telephone +43(0) 7242241-0, email: contact@fronius.com (controller)

and stored.

The processing of this device and operating data is carried out for the purpose of ensuring the operational safety of the device (time synchronization, provision of updates). This processing is therefore necessary for the functionality of the device and thus for the fulfillment of the contract (Art. 6 (1) (b) GDPR).

If you do not wish to have such data processed, you must manually disable the device's internet connection.

In addition, the device and operating data is also processed for the purpose of providing services as part of a supplementary digital service for your device (such as solar.web or similar) as soon as you have registered your device with such a digital service (identification). This data is processed to provide the requested digital services and is therefore necessary for the fulfillment of the contract (Art. 6 (1) (b) GDPR).

Furthermore, this data processing is also carried out for maintenance and support purposes and for handling customer concerns as well as in warranty and guarantee cases (only in individual cases and given connection between device and internet). In this context, the device and operating data may also be passed on to our cooperation partners (third-party providers and suppliers). The processing of this data is necessary for maintenance and support purposes or for processing warranty and guarantee cases and thus for the fulfillment of the contract (Art. 6 (1) (b) GDPR).

Device and operating data are also processed for analysis and diagnostic purposes in order to gain insights into the functionality of the devices and improve them accordingly. This data processing is based on our legitimate interest (Art. 6 (1) (f) GDPR).

We store this data for as long as it is necessary to fulfill the existing contract with you. Any storage beyond this is carried out for legal reasons or if we have a legitimate interest in doing so. For more information on data processing for the solar.web-digital service, as well as our general privacy policy and your rights as a data subject, please visit https://www.fronius.com.

Fronius International GmbH retains the copyrights of these operating instructions.

Text, illustrations, and other media correspond to the technical state of the art at the time of publication. Fronius reserves the right to make changes. If you have any suggestions for improvement or have found a mistake in this document, we would be most grateful for your comments.

FCC
This device corresponds to the limit values for a digital device of class B in accordance with Part 15 of the FCC regulations. The limit values should provide adequate protection against harmful interference in homes. This device creates and uses high frequency energy and can interfere with radio communications when not used in accordance with the instructions. However, there is no guarantee against interference occurring in a particular installation.
If this device interferes with radio or television reception when turning the device on and off, it is recommended that the user solve this with one or more of the following measures:

adjust or reposition the receiving antenna
increase the distance between the affected device and the receiver
connect the device to another circuit, which does not include the receiver
for further support, please contact the retailer or an experienced radio/TV technician.

Industry Canada RSS
The device corresponds to the license-free Industry Canada RSS standards. Operation is subject to the following conditions:
(1) The device may not cause harmful interference
(2) The device must accept any interference received, including interference that may cause undesired operation.

This product is intended for use and sale outside the Province of Québec. It does not meet the French language documentation and labeling requirements of Québec's Charter of the French Language. Accordingly, Fronius International GmbH does not offer this product for sale to, or for delivery to, any address within the Province of Québec.

By placing an order, the customer represents and warrants that they are not purchasing the product for use or resale within Québec. Fronius International GmbH disclaims all liability and warranty obligations for any products operated in Québec in violation of these restrictions.

In accordance with the EU Directive and national law, the following products must be disposed of separately and recycled:

Waste electrical and electronic equipment
Used batteries (portable batteries, industrial batteries)

Used equipment and batteries must be returned to the distributor or an authorized local collection system. Do not dispose of batteries with domestic waste. Protect batteries from high temperatures, direct sunlight, moisture and corrosive environments.

Arrange for the safe collection and proper disposal of damaged, leaking or used batteries by a battery recycling company or the Fronius Service Partner.

In addition, it should be noted that batteries contain substances that, if disposed of improperly, can have a significant negative impact on the environment as well as on human health and the safety of persons, in particular due to the leakage of hazardous substances such as heavy metals or electrolytes, which can contaminate soil, water and air.

This ensures environmental protection and the sustainable use of natural resources.

Packaging materials

Collect separately
Observe local regulations
Compress the cardboard box to reduce volume

The Fronius Smart Meter is a bidirectional electricity meter for optimizing self-consumption and recording a household's load characteristic curve. Together with a Fronius inverter or Fronius Datamanager 2.0 and a Fronius data interface, the Fronius Smart Meter allows you to view your own power consumption. The meter measures the energy flow to the loads or to the public grid and forwards the information to the Fronius inverter or Fronius Datamanager 2.0 via the Modbus RTU/RS485 interface.

CAUTION!

Danger due to non-compliance with the safety instructions

Risk of injury and damage to the device as a result.

Follow all safety instructions.

Switch off the power supply before establishing the mains connection.

The Fronius Smart Meter is a bidirectional electricity meter for optimizing self-consumption and recording a household's load characteristic curve. Together with a Fronius inverter or Fronius Datamanager 2.0 and a Fronius data interface, the Fronius Smart Meter allows you to view your own power consumption. The meter measures the energy flow to the loads or to the public grid and forwards the information to the Fronius inverter or Fronius Datamanager 2.0 via the Modbus RTU/RS485 interface.

CAUTION!

Danger due to non-compliance with the safety instructions

Risk of injury and damage to the device as a result.

Follow all safety instructions.

Switch off the power supply before establishing the mains connection.

The Fronius Smart Meter can be installed at two possible locations in the system, at the feed-in point and at the consumption point.

Positioning at the feed-in point
The positioning of the Fronius Smart Meter at the feed-in point.

Positioning at the consumption point
The positioning of the Fronius Smart Meter at the consumption point.

(1)	Product name
(2)	Nominal voltage, operating frequencies, measurement category
(3)	AC connection area
(4)	Note single-phase grids
(5)	Power status LED green, flashing: Import of energy from public grid red, flashing: Export of energy to the public grid For further display options, see Power Status LEDs
(6)	DIP-switch: set modbus adress, see Set the address of the Fronius Smart Meter set terminating resistor, see Terminating Resistors set Baud Rate, see Set Baud Rate
(7)	CT connection area
(8)	Data communication LED
(9)	Data communication connection area

See the sections referenced below for installation details.

1Turn off power before making line voltage connections.

2Mount the Fronius Smart Meter (see Mounting on page (→)).

3Connect circuit breakers or fuses and disconnects (see Circuit Protection on page (→)).

4Connect the line voltage wires to the meter‘s terminal block (see Line Wiring on page (→)).

5Mount the Current Transformers (CTs) around the line conductors. Make sure the CTs face the correct direction. An arrow might indicate either the load or the source (public grid) (see Connect Current Transformers on page (→)).

6Connect the twisted white and black wires from the CTs to the terminal block on the meter, matching the wire colors to the white and black dots on the meter label (see CT Wiring on page (→)).

7Check that the CT phases match the line voltage phases (see Connect Current Transformers on page (→)).

8Record the CT rated current for each meter, because it will be required during setup.

9Connect the output terminals of the Fronius Smart Meter to the monitoring equipment (see Connecting data communication cables to inverters on page (→)).

10If necessary set terminating resistors (see Terminating Resistors on page (→)).

11Check that all the wires and plugs are securely installed in the terminal blocks by tugging on each wire.

12Turn on the power to the Smart Meter.

13Verify that the LEDs indicate correct operation. If there is a consumption of power and all generated power sources are turned off, then the LEDs from the used phases should flash green (see Power Status LEDs on page (→)).

14Check your Fronius System monitoring software. In order to ensure compatibility between the inverter and the Smart Meter, software must always be kept up-to-date. The update can be started via the inverter website or via Solar.web.

15Set CT-Ratio and Grid Type on the web interface of the Fronius Datamanager in Settings - Meter - Settings (see Commissioning on page (→)).

See the sections referenced below for installation details.

1Turn off power before making line voltage connections.

2Mount the Fronius Smart Meter (see Mounting on page (→)).

3Connect circuit breakers or fuses and disconnects (see Circuit Protection on page (→)).

4Connect the line voltage wires to the meter‘s terminal block (see Line Wiring on page (→)).

5Mount the Current Transformers (CTs) around the line conductors. Make sure the CTs face the correct direction. An arrow might indicate either the load or the source (public grid) (see Connect Current Transformers on page (→)).

6Connect the twisted white and black wires from the CTs to the terminal block on the meter, matching the wire colors to the white and black dots on the meter label (see CT Wiring on page (→)).

7Check that the CT phases match the line voltage phases (see Connect Current Transformers on page (→)).

8Record the CT rated current for each meter, because it will be required during setup.

9Connect the output terminals of the Fronius Smart Meter to the monitoring equipment (see Connecting data communication cables to inverters on page (→)).

10If necessary set terminating resistors (see Terminating Resistors on page (→)).

11Check that all the wires and plugs are securely installed in the terminal blocks by tugging on each wire.

12Turn on the power to the Smart Meter.

13Verify that the LEDs indicate correct operation. If there is a consumption of power and all generated power sources are turned off, then the LEDs from the used phases should flash green (see Power Status LEDs on page (→)).

14Check your Fronius System monitoring software. In order to ensure compatibility between the inverter and the Smart Meter, software must always be kept up-to-date. The update can be started via the inverter website or via Solar.web.

15Set CT-Ratio and Grid Type on the web interface of the Fronius Datamanager in Settings - Meter - Settings (see Commissioning on page (→)).

The Fronius Smart meter has two mounting holes spaced 5.4 in. (137 mm) apart (center-to-center). These mounting holes are normally obscured by the detachable screw terminals. Remove the screw terminals to mark the hole positions and mount the meter.

Self-tapping sheet metal screws are included. Do not over-tighten the screws, as long-term stress on the case can cause cracking.

The Fronius Smart Meter is considered “permanently connected equipment“ and requires a disconnect means (circuit breaker, switch or disconnect) and overcurrent protection (fuse or circuit breaker).

The Fronius Smart Meter only draws 10-30 mA, so the rating of any switches, disconnects, fuses and / or circuit breakers is determined by the wire gauge, the mains voltage and the current interrupting rating required.

The switch, disconnect or circuit breaker must be within sight and as close as practicable to the Fronius Smart Meter and must be easy to operate.
Use circuit breakers or fuses rated for 20 amps or less.
Use ganged circuit breakers when monitoring more than one line voltage.
The circuit breakers or fuses must protect the mains terminals labeled L1, L2 and L3. In the rare cases where neutral has overcurrent protection, the overcurrent protection device must interrupt both neutral and ungrounded conductors simultaneously.
The circuit protection / disconnect system must meet IEC 60947-1 and IEC 60947-3, as well as all national and local electrical codes.

Always turn off power before connecting the line voltage inputs to the Fronius Smart Meter.
For the line voltage wires, 16 to 12 AWG stranded wire, type THHN, MTW or THWN, 600 V are recommended.
Do not place more than one wire per screw terminal; use separate wire nuts or terminal blocks if needed.
Verify that the line voltages match the line-to-line and line-to-neutral values printed in the white box on the front label.

Connect each conductor to the appropriate phase; also connect ground and neutral (if applicable). The neutral connection “N“ is not required on delta models but we recommend connecting it to ground if neutral is not present.

The screw terminal can handle wire up to 12 AWG. Connect each voltage line to the green terminal block as shown in the following figures. After the voltage lines have been connected, make sure both terminal blocks are fully seated in the Fronius Smart Meter.

When power is first applied, check that the LEDs behave normally. If you see LEDs flashing red-green-red-green, the voltage is too high for this model, so disconnect the power switch immediately!

Single-Phase Three-Wire (Mid-Point Neutral) / Two-Phase Australia

Single-Phase Two-Wire without Neutral

Single-Phase Two-Wire with Neutral

Three-Phase Four-Wire Wye

Three-Phase Three-Wire Delta without Neutral

Three-Phase Four-Wire Stinger

Three-Phase Two-Wire Corner Grounded Delta

The current transformer must generate 333.33 millivolts AC at rated current. See the current transformer data sheets for CT ratings (Fronius CT, 41,0010,0104 / 41,0010,0105 / 41,0010,0232).

Do not use ratio or current output such as 1 amp or 5 amp output models!
See the CT data sheets for the maximum input current ratings.
Be careful to match the CTs with the voltage phases. Make sure the CT L1 is measuring the current on the same phase being monitored by the L1 voltage input and the same for phases L2 and L3. Use the supplied colored labels or colored tape to identify the CT leads.
To minimize current measurement noise, avoid extending the CT wires, especially in noisy environments. If it is necessary to extend the wires, use twisted pair cable 22 to 14 AWG, rated for 300 V or 600 V (not less than the service voltage) and shielded if possible
Make sure the CTs face the correct direction. An arrow might indicate either the load or the source (public grid)
If you see strange readings on unused phases, jumper the unused CT inputs: for each unused CT, connect a short cable from the terminal marked with a white dot to the terminal marked with a black dot.

Install the CTs around the conductor to be measured and connect the CT leads to the Fronius Smart Meter. Always turn off power before disconnecting any live conductors. Put the line conductors through the CTs as shown in the previous section.

CTs are directional. If they are mounted backwards or with their white and black wires swapped the measured power will be negative. The status LEDs indicate negative measured power by flashing red.

Split-core CTs can be opened for installation around the conductor. A nylon cable tie may be secured around the CT to prevent inadvertent opening.

The device can be used for power control systems in accordance with the UL 3141 standard. The additionally required current transformers must comply with the specifications of the UL 2808 standard.

NOTE!

Power Control Systems

Power Control Systems according to UL 3141 are only available for installations in the USA, Canada and Mexico.

The current transformers connect to the six position black screw terminal block. Connect the white and black CT wires to the Fronius Smart Meter terminals marked CT L1, CT L2 and CT L3. Excess length may be trimmed from the wires if desired. Connect each CT with the white wire aligned with the white dot on the label and the black wire aligned with the black dot. Note the order in which the phases are connected, as the line voltage phases must match the current phases for accurate power measurement.

Fronius SnapINveter:
Connect the data communication ports of the Fronius Smart Meter to the Fronius system monitoring in the inverter. Several Smart Meters can be installed in the system, see chapter Multi meter system – Fronius SnapINverter on page (→)

1Connect D- to D-.

2Connect D+ to D+.

3Connect - to -.

Fronius GEN24 inverter:
Connect the data communication ports of the Fronius Smart Meter to the Modbus interface of the Fronius GEN24 inverter. Several Smart Meters can be installed in the system, see chapter Multi meter system - Fronius GEN24 inverter on page (→)

1Connect D- to M1-.

2Connect D+ to M1+.

3Connect - to GND.

IMPORTANT! Further information on successful start-up.
Observe the following information on connecting the data communication line to the inverter.

Use a CAT5 type cable or higher.
For data lines belonging together (D+, D- and M1+, M1-) use a twisted pair of cables.
If the output cables are close to the mains wiring, use wires or cables rated at 300 V to 600 V (never less than the operating voltage).
Use double insulated or sheathed output cables when near bare conductors.
Use shielded twisted pair cables to avoid interference.
The outputs of the Fronius Smart Meter are galvanically isolated from dangerous voltages.

The Fronius Smart Meter must be connected to the Fronius Datamanager. If only one Fronius Smart Meter is installed, the Modbus Address is 1.

DIP Switch	1	2	3	4	5	6	7	8
Up (1) value	1	2	4	8	16	32	R 120 Ohm	Baud Rate

Examples

Modbus Adress 1
DIP Switch	1	2	3	4	5	6
Position	1	0	0	0	0	0

Modbus Adress 2
DIP Switch	1	2	3	4	5	6
Position	0	1	0	0	0	0

Modbus Adress 3 (value 1 + 2 = 3)
DIP Switch	1	2	3	4	5	6
Position	1	1	0	0	0	0

Modbus Adress 4
DIP Switch	1	2	3	4	5	6
Position	0	0	1	0	0	0

Modbus Adress 7 (value 1 + 2 + 4 = 7)
DIP Switch	1	2	3	4	5	6
Position	1	1	1	0	0	0

Modbus Adress 20 (value 4 + 16 = 20)
DIP Switch	1	2	3	4	5	6
Position	0	0	1	0	1	0

	Inverter in the system e.g. Fronius Primo GEN24 208-240
	Meter - Fronius Smart Meter WR Terminating resistor is integrated in the meter.
	Fronius or third-party device, connection via Modbus RTU e.g. Fronius Ohmpilot, battery, etc.
	Termination resistance R 120 Ohm

The system might work without terminating resistors. Due to interferences, the use of terminating resistors according to the following schemes are recommended.

Activate the Fronius Smart Meter terminating resistor (R 120 Ohm) by switching pin 7 to ON (1).

Select the baud rate by setting DIP switch position 8 (see below). The change will take effect immediately.

Baud Rate	DIP Switch 8
9600 (default)	0 (OFF)
38400	1 (ON)

	Grid Supplies the loads in the system if insufficient power is being generated by the PV modules or supplied by the battery.
	Inverter in the system e.g. Fronius Primo, Fronius Symo, etc.
	Utility meter Measures the metering data relevant for the billing of electricity quantities (primarily the kilowatt hours of grid purchases and grid power feed). On the basis of the data relevant for billing, the electricity retailer invoices a grid purchase and the purchaser of the surplus pays for the grid power feed.
	Primary meter Records the load curve of the system and makes the measured data available for energy profiling in Fronius Solar.web. The primary meter also regulates the dynamic feed-in control.
	Secondary meter Records the load curve of individual loads and producers (e.g. washing machine, lights, television, heat pump, etc.) in the consumption branch and makes the measured data available for energy profiling in Fronius Solar.web.
	Modbus RTU, Third-party device e.g. Fronius Ohmpilot, battery, etc.
	Loads in the system e.g. washing machine, lamps, TV, etc.
	Additional loads in the system e.g. heat pump
	Additional producers in the system e.g. wind power plant
	Terminating resistor R 120 Ohm

A maximum of 4 Modbus stations can be connected to the Modbus connection terminal.

IMPORTANT!
Only one primary meter, one battery and one Ohmpilot can be connected per inverter. Due to the high data transfer of the battery, the battery occupies 2 subscribers.

Example:

Input	Number of primary meters	Number of secondary meters
Modbus	1	0
	1	1
	1	2
	1	3

If several Fronius Smart Meters are installed, set a separate address for each Smart Meter. The primary meter always receives the address 1. Number all other meters consecutively in the address range from 2 to 14. Different Fronius Smart Meter power categories can be used together.

IMPORTANT! Use a maximum of three secondary meters in a system. To avoid interference, install the terminating resistors as described in chapter Terminating Resistors.

3 secondary meters with connected generators and loads, primary meter in the consumption branch

Position of the primary meter in the consumption branch. *Terminating resistor R 120 Ohm

Position of the primary meter at the feed-in point. *Terminating resistor R 120 Ohm

Observe the following in a multi meter system:

Each Modbus address is assigned only once.
Place the terminating resistors individually for each channel.

The inputs M0 and M1 can be freely selected. A maximum of 4 Modbus participants can be connected to the Modbus terminal on the inputs M0 and M1.

IMPORTANT!
Only one primary meter, one battery and one Ohmpilot can be connected per inverter. Due to the high data transfer of the battery, the battery occupies 2 subscribers.

Example 1:

Input	Number of primary meters	Number of secondary meters
Modbus 0 (M0)	0	4
	0	2
	0	1
Modbus 1 (M1)	1	3

Example 2:

Input	Number of primary meters	Number of secondary meters
Modbus 0 (M0)	1	3
Modbus 1 (M1)	0	4
	0	2
	0	1

If several Fronius Smart Meters are installed, a separate address must be set for each one (see Set the address of the Fronius Smart Meter on page (→)). The primary meter always receives the address 1. All other meters are numbered consecutively in the address range from 2 to 14. Different Fronius Smart Meter power categories can be used together.

IMPORTANT!
Use no more than Use 7 secondary meters in the system. To avoid interference, it is recommended to install the terminating resistors according to the chapter Terminating Resistors on page (→).

Position of the primary meter in the consumption branch. *Termination resistance R 120 Ohm

Position of the primary meter at the feed-in point. *Termination resistance R 120 Ohm

The following must be observed in a multi meter system:

Connect the primary meter and the battery to different channels (recommended).
Distribute the remaining Modbus participants evenly.
Each Modbus address is assigned only once.
Place the terminating resistors individually for each channel.

IMPORTANT! Settings in the "Meter" menu item may only be entered by staff trained to do so!

The service password must be entered for the "Meter" menu item.

Three-phase or one-phase Fronius Smart Meters may be used. In both cases, selection is made via the "Fronius Smart Meter" item. The Fronius Datamanager automatically detects the meter type.

One primary meter and several secondary meters can be selected. The primary meter must be configured before a secondary meter can be chosen.