Siemens Industry Online Support
Siemens AG
Entry type: Product note Entry ID: 109763966, Entry date: 02/07/2019

Sales release and download of firmware 3.1.39 for CP 1242-7 V2, CP 1243-7 LTE, CP 1243-1, CP 1243-8

  • Entry
  • Associated product(s)
Firmware version 3.1.39 is available for download for the following S7-1200 communication modules:


Firmware version 3.1.39 is available for download for the following S7-1200 communication modules:

  • CP 1242-7 GPRS V2 (6GK7242-7KX31-0XE0)

  • CP 1243-7 LTE EU   (6GK7243-7KX30-0XE0)

  • CP 1243-7 LTE US    (6GK7243-7SX30-0XE0)

  • CP 1243-1                  (6GK7243-1BX30-0XE0)

  • CP 1243-8 IRC          (6GK7243-8RX30-0XE0)

The firmware contains general improvements to the product quality and serves to upgrade existing devices of the above-mentioned products.

In particular, project download in the TIA Portal and connection to Sinema Remote with fallback feature have been improved.

STEP 7 V15 or higher must be used to configure the modules with firmware 3.1.X.

The existing firmware version 3.0 is still used in the TIA Portal to configure the module CP 1242-7 (6GK7242-7KX31-0XE0).

The firmware is exclusively compatible with devices of the above-mentioned products, which have hardware version 2.


Third-party software – license conditions and copyright information

You can find the copyright information for third-party software contained in this product, particularly open source software, as well as applicable license conditions of such third-party software in the ReadMe_OSS file.

Special note for resellers

The information and the license conditions in the Readme_OSS file must be passed on to the purchasing party to avoid license infringements by the reseller or purchasing party.

  OSS_CP1243-1_86.pdf (8.5 MB) 

  OSS_CP1243-8_86.pdf (8.5 MB)

  OSS_CP124x7_86.pdf (8.7 MB)


You can download the files  here.

 Registrierung notwendig  6GK7_242-7KX31-0XE0_V03.01.39_OSS.zip (23.4 MB) 

 Registrierung notwendig  6GK7_243-7SX30-0XE0_V03.01.39_OSS.zip (23.4 MB)

 Registrierung notwendig  6GK7_243-8RX30-0XE0_V03.01.39_OSS.zip (23.2 MB)

 Registrierung notwendig  6GK7243-1BX30-0XE0_V03.01.39_OSS.zip (23.2 MB)

 Registrierung notwendig  6GK7243-7KX30-0XE0_V03.01.39_OSS.zip (23.4 MB)



Required user action:

You can either install the firmware update via the web server or via the STEP 7 online diagnostics functions, or create a SIMATIC memory card from the Siemens customer support website from which you can download the firmware update. This process is described in the S7-1200 system manual.

 If you use a SIMATIC memory card for the installation of the firmware update, the retentive memory is retained. However, if you use the web server or the STEP 7 online diagnostics functions for the installation of the update, the retentive memory is lost.

 If you close the web server while executing a firmware update via the web server, you cannot switch the operating mode of the CPU to RUN. In this case, you have to turn the CPU off and on again in order to switch it to the operating mode RUN.

Security information
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