Data Manager M powered by ennexOS

No. Assign the user name and password and then stop the installation assistant. The original PV system data are still there and are adopted automatically.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

System sections can be implemented by using superordinate and subordinate system managers. In this process, all Data Managers (superordinate and subordinate) are displayed as one system in the Sunny Portal powered by ennexOS. In the Sunny Portal powered by ennexOS the system can be divided into system sections.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

No. To be able to detect new devices, the installation assistant of the Data Manager must be started. Devices with different passwords can also be detected in the installation assistant. This way you will receive the same system (installer) password.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

For technical reasons, only in-house certificates will be used. Certificates that could be replaced by an intercepting proxy server cannot be verified. Please contact your grid administrator to specify the exceptions for the firewall. When doing this, follow the information on the outgoing ports in these FAQs.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

The buffer capacitor of the Data Manager's real-time clock might have discharged due to being without voltage supply for a longer time period. Make sure that the Data Manager has access to a time server on the internet to obtain a current time. You can also assign the current time of a connected web browser to the Data Manager (e.g., to interrupt the commissioning process). In this case, the time is not synchronized cyclically with a time server. Over time, this causes inaccuracies (a few seconds per day).

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

You can use the power supply unit of the Sunny WebBox, SMA Cluster Controller, SMA Com Gateway or the SMA Inverter Manager for the Data Manager M and Data Manager M Lite. You can generally use all power supply units that meet the specifications of the datasheet and the Data Manager manual for all Data Manager devices.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

No. The products are not compatible.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

To do this, several Data Managers M must be installed in the system. The Data Manager M supports up to 50 devices (EDMM-20) or up to 30 devices (EDMM-10). At least one Data Manager M must be configured as the superordinate system manager. The other Data Managers M must be configured as subordinate system managers. In Sunny Portal powered by ennexOS, each Data Manager M must be registered separately in the system. All Data Managers M are displayed together in the system. The device overview can show which of the Data Managers M each device is assigned to.

Information:

• The energy meter at the point of interconnection must be assigned to the superordinate Data Manager M.

• Only a Data Manager M as a superordinate system manager can perform controlling. The Data Managers M that function as superordinate system managers are used in open-loop control mode.

• I/O systems that are used to make control settings must be registered with the superordinate Data Manager M.

• The Modbus interface must be activated on the subordinate Data Manager M.

• On the superordinate Data Manager M, the subordinate Data Managers M must be integrated as Modbus devices.

• The device assignment must be unambiguous, otherwise the balance, power and yield values will not be displayed correctly.

• The total power of the system may not exceed 7.5 MVA. For larger systems, a Data Manager L must be used as the superordinate evel system manager.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

Due to internal setup processes, the start of the user interface takes a little longer once during commissioning.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

The following devices are supported and defined as a device:

• PV inverter

• Battery inverter

• Energy meter / power analyzer

• External I/O system

• External, directly communicating sensor

• Weather station

• Charging points (1 SMA EV Charger Business counts as 2 charging points)

• Subordinate Data Manager

• SMA Hybrid Controller (only Data Manager L)

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

Check in the settings of the router whether DHCP is enabled. If DHCP cannot be enabled, a static IP address must be assigned to the Data Manager. For this, establish a direct connection to the Data Manager via WLAN and perform commissioning (see product manual). Assign a correct static IP address to the Data Manager (ask your grid administrator).

or

Connect the Data Manager to a DHCP-capable router outside the system and carry out the commissioning. Assign a correct static IP address to the Data Manager (ask your grid administrator). Then connect the Data Manager to the router in the PV system. Now the Data Manager can be reached via the static IP address. Follow the installation assistant steps and make the settings appropriate for your system.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

When the DHCP validity period expires, a new DHCP request is performed. In the process, it is possible that the Data Manager and connected devices are assigned a new IP address. We recommend using a dynamic host configuration protocol. This always assigns the same IP address to devices with a known MAC address.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

SMA products use the network range 192.168.12.xxx. If this network range is also used in the local network, conflicts may arise in the network. Avoid this network range for the local network. Further information can be found in the manuals for SMA products.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

Depending on the web browser, the entry may be interpreted as a search entry. Enter "https://" before the access address of the Data Manager in the address bar of the web browser.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

In order to save the self-signed certificate of the Data Manager in the web browser, it must initially be accepted as trustworthy in the web browser. After the Data Manager has been reset to the default settings, the web browser interprets this certificate as outdated or invalid. Delete the old certificate in the security settings of your web browser. Reconnect to the Data Manager and accept the newly offered certificate.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

All compatible RS485 devices connected to an SMA Com Gateway can be used with the Data Manager. With the EDMM-20, you can connect RS485 devices to the 2 RS485 inputs for communication via Modbus RTU or Data1 protocol. Once one of the inputs is assigned a specific protocol, only the other protocol can be used on the second input.

In addition, observe the restrictions listed in the FAQ section "Grid management services".

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

In Sunny Portal powered by ennexOS, under Configuration > System properties > External access > Data communication, the frequency and amount of data to be transmitted can be specified in 3 levels (default is "high").

The following table shows the required data volume of two example systems (with the exception of updates, Webconnect, FTP-Push, SMA SPOT):

System

Profile

Firmware version < 1.10.06.R

10 x Sunny Tripower CORE1

1 x SMA Energy Meter (@ 200 ms)

High

400 MB/month

Medium

140 MB/month

Low

10 MB/month

49 x Sunny Tripower CORE1

1 x SMA Energy Meter (@ 200 ms)

High

410 MB/month

Medium

150 MB/month

Low

10 MB/month

If the data transfer rate is below that of the standard LTE connection (e.g., due to used up data volume), all Data Manager services can no longer be guaranteed.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

Every five minutes, the Data Manager L / SMA Power Plant Manager transmits the system data to the Sunny Portal powered by ennexOS. The expected data volume of 60 inverters is up to approx. 500 MB/month. The estimated data volume for 9 inverters is up to approx. 200 MB/month. If the data transfer rate is below that of the standard LTE connection (e.g., due to used up data volume), all Data Manager services can no longer be guaranteed.

[SMA Data Manager L (EDML-10)]

If Field Data Management is activated, a higher data volume of approximately 200-600 MB/day can be expected. Very detailed information is transmitted using a high data rate. An Internet flat rate with an upload rate of at least 1 Mbit/s is recommended. If a firmware update is downloaded via the Remote Service, this is approximately 150 MB per update file.

[SMA Data Manager L (EDML-10)]

In more complex systems, the activation of outgoing ports may be necessary and should be carried out by the network administrator. Incoming ports do not need to be activated.

• FTP push: Port 21 (FTP)

• Updates: Port 80 and 443 (http/https) / update.sunnyportal.de

• Time synchronization with Sunny Portal (if not provided by the Internet router): Port 123 (NTP) / ntp.sunny-portal.com

• Data transmission: Port 443 (https/TLS) / ldm-devapi.sunnyportal.com

• User interface: Port 443 (https/TLS) / ennexos.sunnyportal.com

• SMA Webconnect 1.5, SMA SPOT and SMA Live-View: Port 9524 (TCP) / wco.sunnyportal.com

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

Since VPN connections often cause display errors and functional restrictions, contact your administrator if there are any problems.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

For Modbus devices, either static DHCP or static IP addresses are recommended so that the IP addresses do not change during operation. The static DHCP can be set in the router (the MAC address always receives the same DHCP address). A static IP address can be specified in the respective device (must not be in the router's DHCP address range).

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

The following query rates apply for reading out devices connected to a Data Manager M:

Devices

Query rates

Speedwire devices

1 second for active and reactive power

5 seconds for remaining measured values

30 seconds for parameters

100 ms for default values

Modbus/TCP inverters

1 second for active and reactive power

5 seconds for remaining measured values

30 seconds for parameters

100 ms for default values

SMA Data1 inverters (RS485)

10 seconds to several minutes for measured values (depending on system size)

30 minutes for parameters

10 seconds to 30 seconds for default values (depending on system size)

Modbus TCP energy meter / power analyzers

200 ms or 1000 ms for P/Q measured values (depending on device type)

5 seconds for additional measured values

Internal digital inputs (Data Manager)

• Automatic switching to backup in only approx. 
100 milliseconds

External I/O systems

1 second for measured values

100 ms for output values (Wago, Moxa per Modbus TCP)

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

The data transfer rate is automatically set to 200 ms by the Data Manager if the meter used is used as a meter at the point of interconnection.

Nevertheless, to adjust the data transfer rate of the SMA Energy Meter, you have to log in to the user interface of the SMA Energy Meter with the user group Installer (see the SMA Energy Meter manual). The remote configuration of the SMA Energy Meter is not possible for safety reasons.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

This is possible with some restrictions (see the technical information "SMA Data Manager M / L - System control with two measuring devices" at www.SMA-Solar.com).

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

In order to add new devices to the Data Manager, the devices have to be in operation and located in the local grid. Make the following settings on the user interface of the Data Manager:

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

You can connect suitable energy meters / power analyzers to the Data Manager by using the local grid. Furthermore, all energy meters / power analyzers that have a Modbus TCP interface can be connected (for a list of supported devices, refer to the Data Manager manual and the manufacturer's declaration at www.SMA-Solar.com). The measured data are displayed in real time as a list view in the Data Manager. The data can be displayed with a delay as curves in the Sunny Portal powered by ennexOS.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

Exactly 1 energy meter is supported at the point of interconnection. This is used both for monitoring and energy balance and for open-loop control / closed-loop control at the point of interconnection.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

The energy meter / power analyzer is connected to the grid operator at the point of transfer:

• for low-voltage installations (e.g., according to VDE AR-N 4105), at the low-voltage point of common coupling

• for medium-voltage installations (e.g., according to VDE AR-N 4110), on the medium-voltage side of the transformer (current and voltage converters must be connected on the medium-voltage side with the same wiring diagram)

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

No, that's currently not possible. Each device used can represent only one system device. Modbus TCP data concentrators that map, for example, several energy meters to different Modbus register ranges or unit IDs can only be used for a single system device. Data concentrators that are connected via Modbus RTU and map multiple devices via different unit IDs could be used for this function. Currently, there are no known data concentrators that operate in this mode.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

It is possible that the IP address of the I/O system cannot be determined. Check in the router's settings whether DHCP is enabled and, if necessary, enable DHCP. Make sure that the I/O system is set to DHCP. For this, all DIP switches on the I/O system must be set to ON (see the manufacturer's manual or the "WAGO-I/O-SYSTEM 750 with SMA DATA MANAGER M" manual at www.SMA-Solar.com).

When the DHCP validity period expires, a new DHCP request is performed. In the process, it is possible a new IP address is assigned. For Modbus devices, either static DHCP or static IP addresses are recommended so that the IP addresses do not change during operation.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

In order to use the I/O system with the Data Manager, the I/O system must be registered with its IP address in the Data Manager. To determine the IP address of the I/O system, proceed as follows:

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

Make sure that the I/O system is set to DHCP or a valid IP address (see the manufacturer's manual or the "WAGO-I/O-SYSTEM 750 with SMA DATA MANAGER M" manual at www.SMA-Solar.de).

The I/O system must be configured as follows (from left to right):

• 750-352: Fieldbus coupler/controller

• 750-602: DC power supply (24 V)

• 750-1414: 8 digital inputs (24 V)

• 750-1515: 8 digital outputs (24 V)

• 750-464: 2/4 resistance inputs (2 x Pt100)

• 750-455: 4 analog inputs (4 to 20 mA)

• 750-559: 4 analog outputs (0 to 10 V)

• 750-600: End clamp

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

The WAGO I/O SYSTEM 750 is suitable for connecting Pt100 temperature sensors with 2, 3 or 4 conductors. SMA only supports connecting Pt100 temperature sensors with 2 conductors since the corresponding 750-464 bus terminal is preset to 2-channel measuring (see Fig. 1). Inputs that are not used must be bypassed (see Fig. 2).

For bypassed measuring channels, the value -200°C is shown in the user interface of the Data Manager. No values are shown when sensors are defective or cables broken (see the manufacturer's manual or the "WAGO-I/O-SYSTEM 750 with SMA DATA MANAGER M" manual at www.SMA-Solar.de).

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

Make sure that DHCP or a valid IP address has been set for the I/O system. For Modbus devices, either static DHCP or static IP addresses are recommended so that the IP addresses do not change during operation. Ensure that the mode of the analog inputs is adjusted for the I/O system (see manufacturer manual).

IP address:

The IP addresses of the I/O systems from Moxa can be adjusted via the user interface or via the ioSearch program from Moxa.

To be able to use the analog inputs of the I/O system with the Data Manager, the analog inputs of the I/O system must be set to 4 mA to 20 mA (see the manufacturer’s manual).

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

You can connect temperature sensors, solar irradiation sensors and anemometers directly to the Data Manager. The measured data are displayed in real time as a list view in the Data Manager. Furthermore, the data can be displayed in wave form in the Sunny Portal powered by ennexOS. The temperature sensors' data are directly linearized in the Data Manager. In the case of solar irradiation sensors and anemometers, however, the sensor itself must be designed for a linearization of the data. For sensor connection options, see the technical information "SMA DATA MANAGER / SUNNY PORTAL powered by ennexOS - Functions" at www.SMA-Solar.com).

[SMA Data Manager M (EDMM-20)]

You can connect temperature sensors, solar irradiation sensors, and anemometers to a suitable I/O system. The measured data are displayed in real time as a list view in the Data Manager. Furthermore, the data can be displayed in wave form in the Sunny Portal powered by ennexOS. The linearization of the temperature sensors' data takes place in the I/O system. In the case of solar irradiation sensors and anemometers, however, the sensor itself must be designed for a linearization of the data. For sensor connection options, see the technical information "SMA DATA MANAGER / SUNNY PORTAL powered by ennexOS - Functions" at www.SMA-Solar.com).

[SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

Only 1 sensor for irradiation, external temperature, module temperature and wind speed can be each assigned. It is not possible to configure multiple sensors of the same type.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

The ioLogik E1260 from Moxa is suitable for the connection of Pt100 temperature sensors with 2 or 3 conductors.

3-conductor connection:

When connecting Pt100 temperature sensors with 3 conductors, the measurements are more accurate, especially for long conductor lengths.

2-conductor connection:

When connecting Pt100 temperature sensors with 2 conductors, SMA recommends connecting a 3-core shielded cable to the ioLogik E1260 from Moxa. Lead the third conductor close to the Pt100 temperature sensors and connect it to one of the two Pt100 connections. Connect the cable shield on one side to the grounding conductor on the ioLogik E1260 from Moxa. The Moxa ioLogik E1260 itself does not have a connection for a grounding conductor. That is why the grounding conductor of the switch cabinet should be used (there should be a grounding conductor on the DIN rail or the enclosure of the switch cabinet). In case of inaccurate measured values, the inputs of the Moxa ioLogik E1260 can be individually calibrated via the user interface (see the manufacturer's manual).

[SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

Some Modbus devices may have been restarted due to a voltage drop. In the process, the Modbus devices received new, modified IP addresses from the DHCP router. This can happen if no MAC address connection has been set in the DHCP router. So the Modbus devices do not necessarily receive the same IP address.

Set up the MAC address connection in your DHCP router or, if possible, extend the validity period of the DHCP to infinite.

If the IP address of a Modbus device has been changed, it must be entered in the installation assistant of the Data Manager.

Assign only static IP addresses for Modbus devices if possible.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

The bytes in the product are set as follows and may need to be adjusted in the RS485 device:

• 8-bit transmission, no parity (optional: odd/even)

• Baud rate: 1200, 9600 or 19200

• Stop bits: 1 (standard) or 2

Parallel operation of Modbus RTU and SMA Data1 is not possible. With the EDMM-20, it must be noted that each protocol has been assigned its own RS485 bus with either COM1 or COM2 of the EDMM-20. Both protocols are not permitted on the same bus.

An RS232/RS485 converter is required for the Data Manager.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

The values have to be assigned as system values in the sensor configuration.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

This is possible in Sunny Portal powered by ennexOS. PV subarrays and system groups can be created and visualized there (see the Sunny Portal powered by ennexOS manual at www.SMA-Solar.com).

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

Only systems with a Sunny WebBox or an SMA Cluster Controller can be carried from the classic Sunny Portal over to Sunny Portal powered by ennexOS.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

When a system is deleted in Sunny Portal powered by ennexOS, the associated Data Manager and any existing subordinate Data Managers must also be reset to default settings. Otherwise, these Data Managers cannot be registered in other systems.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

The Data Manager typically requires static signals on the internal inputs (I/O system from Wago or Moxa). For more information, see the technical information "Conversion of Power Specifications via Pulse Signals" at www.SMA-Solar.com.

If the internal digital inputs of the Data Manager M are used, they can also use pulse signals (pulse duration >=1 s). To do this, enter the appropriate fallback and default settings.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

A distinction must be made here between active and reactive power:

Active power

If the grid operator specifies an active power specification at the point of interconnection, this always refers to the measurement at the point of interconnection. Therefore, for pure feed-in systems, the operating mode "open-loop control" (without feedback of the actual value) is sufficient. For systems with self-consumption, the operating mode "closed-loop control" (with feedback of the actual value) should be used, since this converts excess PV energy into self-consumption and the power value at the point of interconnection still meets the grid operator's specification.

Reactive power

In pure feed-in systems and also in systems with self-consumption, the operating mode "closed-loop control" (with feedback of the measured values from the point of interconnection) should be selected. This way, the Data Manager accounts for and controls the influences of the line and, if applicable, of the transformer.

In systems with high self-consumption and a high reactive power demand (e.g., operation of electrical machines in commercial and industrial plants without an additional compensation system), the PV inverters might not be able to control the setpoints at the point of interconnection (reactive power value, cos phi value). For example, this can be operation of electrical machines in commercial and industrial plants without additional compensation equipment. In such systems, the PV inverters will generate almost only reactive power and hardly any active power. In such cases, the "open-loop control" operating mode is recommended. Contact your local grid operator.

To use inverters via RS485/SMA Data1, follow the information in these FAQs. To use FLX/TLX inverters (communication protocol EtherLynx), the open-loop control mode is also recommended for the reactive power setpoint.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

No, this is currently not possible. Active and reactive power measurement values are required for a complete closed-loop control and open-loop control. These are only provided by a power meter if it is possible to measure both the voltage and the current. 

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

No, this is not possible. The Data Manager supports only one measuring device for the point of interconnection.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

This should be avoided, as this causes the active and reactive power values to not match the actual values. When this happens, both the transformer losses and its phase shift lead to a faulty measurement.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

No, in such a case you can use a "virtual" utility grid meter in the Data Manager. This lets you specify an external cos phi setpoint. The specified setpoint will be different from the value that is set at the point of interconnection. An external closed-loop control by the grid operator is required. Make the following settings on the user interface of the Data Manager:

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

In systems with inverters, all inverters must first be commissioned in order to accurately display the system power. Then configure the subordinate Data Managers. Then configure the superordinate Data Managers. Set up the system in Sunny Portal powered by ennexOS only after all Data Managers have been configured. Please note that all superordinate and subordinate Data Managers must be registered with PIC and RID. This is done simultaneously for all devices via the system setup assistant in Sunny Portal powered by ennexOS.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

This is currently only possible through direct parameter setting in the device (see the technical information "SMA GRID GUARD 10.0 - Grid Management Services via Inverter and System Controller" at www.SMA-Solar.com).

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

No. A subordinate Data Manager can only be used in open-loop control. The superordinate Data Manager is responsible for the closed-loop control.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

This communication is monitored with a fixed timeout of 10 seconds. If the communication fails, the device is displayed as being disrupted. If closed-loop control is active at the point of interconnection, the operating mode is switched to open-loop control. This means that the setpoints are transmitted to the inverters (without closed-loop control). As a result, an inverter will not recognize this disturbance as such, and its own fallback behavior will not be activated if there is a communication failure. The inverter continues to receive the specifications from the Data Manager.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

Inverters connected via RS485 communicate via the SMA-specific protocol SMA Data1. It is also possible to transfer power specifications to the inverters. However, there are restrictions that affect systems that have such devices (regardless of whether these devices are connected directly to the Data Manager M via an SMA COM Gateway):

• Due to stability reasons, if there are SMA Data1 devices in the system, controlled operation (closed-loop control) is not possible. Only controlled operation (open-loop control) is possible. As a result, any possible self-consumption is not taken into account in the event of power reduction specified externally or at a constant level.

• However, if this is desired, the RS485 devices concerned must be replaced by devices that can communicate directly via Ethernet (SMA Speedwire or Modbus SunSpec).

If a reactive power setpoint is required in addition, there are also restrictions in this case:

• Not all SMA inverters are reactive power-capable (this applies in particular to SMA inverters launched on the market before 2007).

• If these inverters are reactive-power capable and a setpoint should be specified, the inverters must be connected directly to the Data Manager M. If the inverters are connected via an SMA COM Gateway, it cannot be ensured that the function is given for all reactive power-capable inverters.

• Here, too, only controlled (open-loop control) operation is possible.

We recommend resetting the feed-in power limitations set in the inverter so that the parameters "P-Limit" and "P-Max" are set identically to the maximum power of the respective inverter.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10)]

Run the installation wizard for the grid management services. When doing this, check the values for the AC nominal system power and fallback values. Adjust the values to the AC nominal system power that may have changed.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

SMA Speedwire is a wired, Ethernet based fieldbus for the implementation of powerful communication networks in decentralized large-scale PV power plants. SMA Speedwire uses the internationally established Ethernet standard, the Ethernet based IP protocol as well as the communication protocol SMA Data2+ optimized for PV systems. This enables a consistent 10/100 Mbit data transmission to the inverter as well as reliable monitoring, control and regulation of the system (refer to the technical information “SMA SPEEDWIRE FIELDBUS” at www.SMA-Solar.com).

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

When data communication between the Data Managers and inverters is encrypted, cyber security attacks on PV systems are much more difficult.

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

• SMA Data Manager

• Inverters with SMA Speedwire from a production date > 2010 that are not connected via an SMA Com Gateway

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]

[SMA Data Manager M (EDMM-20), SMA Data Manager M (EDMM-10), SMA Data Manager L (EDML-10)]