Import variables: CSV file structure

The import function in the data source configurator is, together with the export function, built to easily and effortlessly copy variables from one device to another. Additionally, you can use the import function to prepare variables in a CSV file and load them all at once into your configurator.

This article explains the structure of the CSV file and the syntax of the corresponding settings. Despite the fact that every protocol is structured in it’s own way (i.e. Siemens S7 works with Data Blocks and OPC-UA doesn’t) a uniform file structure is applied for all protocols.

How to: export and import variablesView any of the protocol-specific guides about the actual steps of exporting and importing a CSV file.

CSV file structure

The structure of the CSV file needs to be correct for the import function to work properly. The headers (first row) of column 1-9 should look like this:

Identifier Name Address Type Width Signed Max string length Factor Unit

Each column represents a different setting and these are all explained below. Easily navigate to the desired section by pressing the corresponding header above.

Tip: an easy templateYou can quickly and easily create a template by first creating a single variable using X4 Remote interface and then exporting this variable to a CSV file, or download an empty template here:download_csv_l-blue.png.


This variable ensures that every data source and variable in the your company remains unique, even when you give multiple variables the same name. An identifier only has to be unique for a certain data-source. Two different data-sources in the same company can have the same identifiers and can therefore import the same CSV-file.


You can name the variables freely. It is advised to enter a very brief description of the variable (i.e. weight, temperature zone #1, emergency stop section B5).


The address is protocol specific, since every protocol has it’s own structure, and is explained separately for the following protocols:

  • OPC-UA
  • Siemens
  • Modbus TCP/IP
  • BACnet/IP
  • SMTP
  • Digital input


On X4 Remote you can enter your variable’s address, consisting of an identifier type, a namespace index, and an identifier. Both identifier types (string and numeric) require a different address when used in Cloud Logging and Alarming. The example table below shows how to list the addresses in the CSV file.

Online (X4 Remote) Offline (CSV file)
Identifier type Namespace index Identifier Address
String 2 20001 ns=2;s=20001
Numeric 2 20001 ns=2;i=20001

Namespace index? Identifier? Unsure about what your variable's namespace index or identifier is? Have a look at our OPC-UA data source article.


On X4 Remote you can enter your variable’s region (DB, I, M, or Q) and address. If you have selected DB as region, you will see an additional field named “Data block“. The example table below shows how to list the addresses in the CSV file.

Online (X4 Remote) Offline (CSV file)
Region Data block Address Address
DB 3 2.1 3.2.1
I   2.1 I2.1
M   2.1 M2.1
Q   2.1 Q2.1

Address?Unsure about what your variable's address is or unable to find it? Have a look at our Siemens S7 data source article.

Modbus TCP/IP

On X4 Remote you can enter your variable’s function code (coils, discrete input, holding registers, or input registers) and address. The example table below shows how to list the addresses in the CSV file.

Online (X4 remote) Offline (CSV file)
Function code Address Address
1 – Coils 1 1.1
2 – Discrete input 1 2.1
3 – Holding registers 1 3.1
4 – Input registers 1 4.1


On X4 Remote you can enter the variable’s object typeinstance, and a property. The object type and property also have a numeric identifier. For example, object type “analog_value” corresponds with numeric identifier “2”. These are determined by the BACnet/IP protocol itself, but can also have custom identifiers that are configured by the user. The example table below shows how to list the addresses in the CSV file.

Online (X4 Remote) Offline (CSV file)
Object type Object identifier Object property Address
analog_value 4 present_value 2.4.85


On X4 Remote you can enter the data typeaction, and keywords to determine which data from the original e-mail you’d like to pass on. The table below shows examples of all possible actions.

Online (X4 Remote) Offline (CSV file)
Data type Action Keywords Address
String Return e-mail subject High SMTP::Keyw:High
String Return e-mail body Medium SMTP::Keyw:Medium
String Search for text pattern: “Description” Low SMTP::Keyw:Low

Digital input

On X4 Remote you can enter the data type and communication protocol. The example below shows how to list the x500’s digital input in the CSV file.

Online (X4 Remote) Offline (CSV file)
Type Protocol Type Address
Boolean GPIO bool GPIO::

Data type (type, width & signed)

In the CSV file a variable’s data type is divided into 3 separate settings:

  • Type: bool, int, float, or string.
  • Width: is required when the type is an int or float. Available widths are 8, 16, 32, and 64 bits.
  • Signed: “TRUE” for data types that can be positive and negative (signed). “FALSE” for data types that can only be positive (unsigned).

This table explains the available data types and their corresponding notation in the CSV file.

Online (X4 Remote) Offline (CSV file)
Data type Type Width Signed
BOOL bool    
INT int 16 TRUE
DINT int 32 TRUE
LINT int 64 TRUE
REAL float 32  
LREAL float 64  
STRING str    

Max string length

A string data type requires its maximum amount of characters to be specified in the “Max string length” column. Leave this column empty when the data type is not a string.


You can multiply the value. This can be useful when you would like to measure grams in kilograms, for example. In this example you would set the factor to 0.001.


The unit of measurement (i.e. kg, liter, °C, bar) will be visible in dashboards to the right of each value.


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