Siemens has recently announced that the LOGO! 6 basic devices and expansion modules will only now be available as a spares part only. While the LOGO! 6 will still be available until product cancellation, Siemens shall be ensuring the continued availability of spare parts by limiting the number of spare products supplied to a maximum of three units per order, orders above this will not be supplied.

There are replacements for the LOGO! 6 that we will look at in the following article.

What is The Replacement For Siemens LOGO! 6?

The Siemens LOGO! 6 has been replaced by the Siemens LOGO! 8 range of logic modules. The new controllers offer significant benefits over the LOGO! 6 range. For reference we have listed below the replacement versions of the basic devices:


Product Designation LOGO! 6 LOGO! 8
LOGO! 230 RCE 6ED1052-1FB00-0BA6 6ED1052-1FB08-0BA0
LOGO! 230 RCEo 6ED1052-2FB00-0BA6 6ED1052-2FB08-0BA0
LOGO! 12/24RCE 6ED1052-1MD00-0BA6 6ED1052-1MD08-0BA0
LOGO! 12/24RCEo 6ED1052-2MD00-0BA6 6ED1052-2MD08-0BA0
LOGO! 24 RCE 6ED1052-1HB00-0BA6 6ED1052-1HB08-0BA0
LOGO! 24 RCEo 6ED1052-2HB00-0BA6 6ED1052-2HB08-0BA0
LOGO! 24 CE 6ED1052-1CC01-0BA6 6ED1052-1CC08-0BA0
LOGO! 24 CEo 6ED1052-2CC01-0BA6 6ED1052-2CC08-0BA0
LOGO! TD 6ED1055-4MH00-0BA0 6ED1055-4MH08-0BA0

What Are The Benefits of The LOGO! 8?

The Siemens LOGO! 8 offers significant benefits for users of LOGO! 6 devices in including the price and availability benefits now that the LOGO! 6 is a spares part.

Siemens LOGO! 8 has eight basic modules that now have an Ethernet connection allowing program transfer and communication on standard Ethernet networks. Siemens LOGO! 8 can be incorporated into large automation networks for communication to SIMATIC S7-compatible devices, and Modbus TCP/IP integrated.


The eight basic modules have improved hardware to the LOGO! 6 and have an extended temperature range without condensation with a range of -20 to 55 °C. The LOGO! 8 display now has double the space available compared to the LOGO! 6 device and has three background colours to choose from, ideal for displaying warnings and signalling.

In addition to the embedded Ethernet communication the new LOGO! 8 has an integrated web server for cost-effective remote user control and monitoring of the program. The design of the web server interface allows users to create web pages even if you have no HTML experience.

The Siemens LOGO! 8 can also be used as a cost-effective data logger allowing monitoring of processes combined with the LOGO! Access tool users can now export the data to a CSV file.


What is The Difference Between LOGO! 6 And LOGO! 8

Features of the LOGO! 8 Benefits Comparison to LOGO! 6
Eight basic modules with Ethernet connectivity Communication on Ethernet networks. No special programming cable required. Easier programming via Ethernet. Eight modules with no integrated communication
400 function blocks Enhanced program memory 200 function blocks
GSM/GPS Communication Module Communication via text message and time synchronisation. Remote control and alarming possible by external devices, no time synchronisation
Integrated Web Server Remote user control and monitoring Functionality not available on LOGO! 6
Innovative macro function Allows creation of macro function blocks and libraries, making repeating programme creation tasks more user-friendly. Functionality not available on LOGO! 6
Enhanced display with six lines of text with 16 characters per line. Three background colours Messages are displayed more clearly. Warnings and signalling can be communicated allowing diagnostic via the display. Four lines with 12 characters per line. Only one backlight that is switchable.
Data Logging Process values can be stored in the internal memory or micro SD card Functionality not available on LOGO! 6
Data Transfer to PC in run mode via LOGO! Access Tool Process data can be exported in a CSV file and analysed in Excel Functionality not available on LOGO! 6
Touch Panel HMI can be connected The latest operator HMI panels can be connected allowing additional features such as graphical options Functionality not available on LOGO! 6
Extended temperature range -20 to 55 °C Outdoor use 0 to 55 °C
Modbus TCP/IP Communication to other third-party devices Functionality not available on LOGO! 6
Time synchronisation via NTP client and server Ensures all LOGO! modules in a system have the same time Functionality not available on LOGO! 6

Frequently Asked Questions About Siemens LOGO! 6 Conversion to LOGO! 8 Devices

Can I Use LOGO! 6 Programmes With LOGO! 8 Controllers?

Programs created for LOGO! 6 can run in LOGO! 8 without restrictions. The LOGO! Soft Comfort V8.1 software supports this transition.

Can I Use LOGO! 6 Expansion Modules With LOGO! 8 Controllers?

LOGO! 6 Expansion modules are not compatible with LOGO! 8 controllers, LOGO! 8 modules have a modified backplane and are mechanically not compatible.

Can I Use LOGO! 6 Memory Cards With LOGO! 8 Controllers?

Siemens LOGO! 6 and other LOGO! specific memory cards are not compatible with the new Siemens LOGO! 8 devices; the new controllers use a standard micro SD card.

What Software Do I Need For Programming The New Siemens LOGO! 8 Devices?

LOGO! Soft Comfort V8.2 is required for programming the LOGO! 8 devices. A free update is available on the internet for downloading.

Download link for software upgrade.

IS The LOGO! 8 The Same Size As The LOGO! 6 PLC?

ALL LOGO! 8 modules are the same size as LOGO! 6 modules. Retro-fit is simple. KNX module is twice the size (4 MW). AS-I connection no longer possible

How Many Ethernet Interfaces Does a LOGO! 8 Have?

LOGO! 8 features one Ethernet interface, allowing for greater distances between the LOGO! and LOGO! TDE display along with easier programming.

The LOGO! TDE display has two Ethernet interfaces.

Can The LOGO! 8 Communicate With Other Siemens Devices?

Ethernet ports allow you to communicate with up to eight other LOGO! devices, including SIMATIC S7 controllers or HMI panels via Ethernet TCP/IP.

How Many Logic Controllers Can The LOGO! 8 Connect With?

The Ethernet interface allows the LOGO! 8 to hold eight static communication links with up to eight logic controllers in a network, plus an additional link to a PC or field PG and one for the LOGO! TDE Display.

Does The LOGO! 8 Support AS-i Connectivity?

LOGO! 8 no longer supports the AS-I protocol.

What Training is Available For The LOGO! 8?

Siemens has put together a comprehensive range of online training, in these free Web-Based Training courses you will learn the basics of the LOGO! devices and the LOGO! Soft Comfort software. View the Siemens online training here