SMA Modbus EDMM-US-10, Modbus EDMM-10 Technical Information

EDMM-10-Modbus-TI-en-11 | Version 1.1ENGLISH

Technical Information

SMA Modbus® Interface

SMA DATA MANAGER M

Legal Provisions

SMA Solar Technology AG

Technical InformationEDMM-10-Modbus-TI-en-112

Legal Provisions

The information contained in these documents is property of SMA Solar Technology AG. Any
publication, whether in whole or in part, requires prior written approval by SMA Solar Technology
AG. Internal reproduction used solely for the purpose of product evaluation or other proper use is
allowed and does not require prior approval.

SMA reserves the right to modify the implementation of communication interfaces and protocols at
any time without notifying the user. It is the user’s responsibility to determine whether the
downloaded content is up to date and to comply with it. SMA shall not be held liable for any
damage as well as any assumption of consequential costs for customer systems by SMA that may
result from the user’s failure to do so.

Software licenses

You will find the software licenses for the installed software modules on the Internet at www.SMA­Solar.com.

Trademarks

All trademarks are recognized, even if not explicitly identified as such. Missing designations do not
mean that a product or brand is not a registered trademark.

SMA Solar Technology AG

Sonnenallee 1
34266 Niestetal
Germany
Tel. [phone]
Fax [phone]
www.SMA.de
Email: [e-mail]

Status: 6/5/2018
Copyright © 2018 SMA Solar Technology AG. All rights reserved.

Table of Contents

SMA Solar Technology AG

Technical Information EDMM-10-Modbus-TI-en-11 3

Table of Contents

1 Information on this Document................................................. 4

1.1 Validity........................................................................................................................ 4

1.2 Target Group.............................................................................................................. 4

1.3 Content and Structure of this Document ................................................................... 4

1.4 Levels of warning messages...................................................................................... 4

1.5 Symbols in the Document .......................................................................................... 5

1.6 Typographies in the document.................................................................................. 5

2 Safety ........................................................................................ 6

2.1 Intended Use .............................................................................................................. 6

2.2 Safety Information...................................................................................................... 6

3 Product Overview .................................................................... 8

3.1 Modbus Protocol........................................................................................................ 8

3.2 SMA Modbus Profile ................................................................................................. 8

3.3 System Topology........................................................................................................ 8

3.4 Addressing and Data Transmission........................................................................... 8

3.4.1 Unit IDs.................................................................................................... 8

3.4.2 Register Address, Register Width and Data Block ............................... 8

3.4.3 Data Transmission................................................................................... 9

3.4.4 Reading and Writing of Data................................................................ 9

3.4.5 SMA Data Types and NaN Values ...................................................... 10

3.4.6 SMA Data Formats................................................................................. 10

3.4.7 SMA Firmware Data Formats ................................................................ 11

3.5 Modbus Ports ............................................................................................................. 12

3.6 Data Processing and Time Behavior ......................................................................... 12

3.7 Frequently Used Number Codes .............................................................................. 13

4 Assignment Tables ................................................................... 15

4.1 Information on Assignment Tables ............................................................................ 15

4.2 Unit ID = 1 (Communication Product) ...................................................................... 15

4.3 Unit ID = 2 (System) .................................................................................................. 15

5 Contact ...................................................................................... 19

1 Information on this Document

SMA Solar Technology AG

Technical InformationEDMM-10-Modbus-TI-en-114

1 Information on this Document

1.1 Validity

This document is valid for:

• EDMM-10 (SMADataManagerM)

• EDMM-US-10 (SMA Data Manager M)

1.2 Target Group

The tasks described in this document must only be performed by qualified persons. Qualified
persons must have the following skills:

• Detailed knowledge of the grid management services

• Knowledge of IP-based network protocols

• Knowledge of the Modbus specifications

• Training in the installation and configuration of IT systems

• Knowledge of and compliance with this document and all safety information

1.3 Content and Structure of this Document

This document does not contain any information on the Modbus registers provided by SMA
products. Furthermore, no information on the firmware version to be installed on the respective
SMA product is included. Information on firmware versions and device-specific Modbus registers of
SMA products can be found on our product pages or Modbus page at www.SMA-Solar.com.

This document does not contain any information on software which can communicate with the
Modbus interface (see the software manufacturer's manual).

This document provides a general description of the Modbus interface integrated in SMA products.

1.4 Levels of warning messages

The following levels of warning messages may occur when handling the product.

DANGER

Indicates a hazardous situation which, if not avoided, will result in death or serious injury.

WARNING

Indicates a hazardous situation which, if not avoided, could result in death or serious injury.

CAUTION

Indicates a hazardous situation which, if not avoided, could result in minor or moderate injury.

NOTICE

Indicates a situation which, if not avoided, can result in property damage.

1 Information on this Document

SMA Solar Technology AG

Technical Information EDMM-10-Modbus-TI-en-11 5

1.5 Symbols in the Document

Symbol Explanation

Information that is important for a specific topic or goal, but is not
safety-relevant

☐

Indicates a requirement for meeting a specific goal

☑

Desired result

✖

A problem that might occur

1.6 Typographies in the document

Typography Use Example

bold

• Messages

• Terminals

• Elements on a user interface

• Elements to be selected

• Elements to be entered

• Connect the insulated
conductors to the terminals
X703:1 to X703:6.

• Enter 10 in the field

Minutes.

>

• Connects several elements to be
selected

• Select Settings > Date.

[Button]
[Key]

• Button or key to be selected or
pressed

• Select [Enter].

2 Safety

SMA Solar Technology AG

Technical InformationEDMM-10-Modbus-TI-en-116

2 Safety

2.1 Intended Use

The Modbus interface of the supported SMA products is designed for industrial use and has the
following tasks:

• Remote control of the grid management services of a PV system

• Remote-controlled querying of the measured values of a PV system

• Remote-controlled changing of the parameters of a PV system

• Interface for direct marketing
The Modbus interface can be used via the protocol Modbus TCP.
All components must remain within their permitted operating ranges and their installation

requirements at all times.
Use this product only in accordance with the information provided in the enclosed documentation

and with the locally applicable standards and directives. Any other application may cause
personal injury or property damage.

Alterations to the product, e.g. changes or modifications, are only permitted with the express written
permission of SMA Solar Technology AG. Unauthorized alterations will void guarantee and
warranty claims and in most cases terminate the operating license. SMA Solar Technology AG
shall not be held liable for any damage caused by such changes.

Any use of the product other than that described in the Intended Use section does not qualify as the
intended use.

The enclosed documentation is an integral part of this product. Keep the documentation in a
convenient place for future reference and observe all instructions contained therein.

2.2 Safety Information

This section contains safety information that must be observed at all times when working on or with
the product.

To prevent personal injury and property damage and to ensure long-term operation of the product,
read this section carefully and observe all safety information at all times.

NOTICE

Damage of SMA products due to cyclical changing of parameters

The parameters of SMA products that can be changed with writable Modbus registers (RW) are
intended for long-term storage of device settings. Cyclical changing of these parameters leads to
destruction of the flash memory of the SMA products.

Parameters for grid management services to control and limit the nominal PV system power are
an exception. Such parameters can be changed cyclically.

• Do not change device parameters cyclically.

• Use the parameters for grid management services for the automated remote control of the
PV system.

2 Safety

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Technical Information EDMM-10-Modbus-TI-en-11 7

NOTICE

Manipulation of PV system data in Ethernet networks

You can connect the supported SMA products to the Internet. When connected to the Internet,
there is a risk that unauthorized users can access and manipulate the data of your PV system.

• Set up a firewall.

• Close unnecessary network ports.

• If absolutely necessary, only enable remote access via a virtual private network (VPN).

• Do not set up port forwarding at the used Modbus ports.

Access to data points after activating the Modbus interface

The reading and writing access to data points is possible after activating the Modbus
interface. All parameter changes are shown on the user interface of the SMA product.

• Ensure that the Modbus interface is still active after resetting the SMA product to default
settings.