Siemens Industry Online Support
Siemens AG
Entry type: Product note Entry ID: 109757489, Entry date: 05/02/2018

Sales and delivery release and download of firmware 3.1 for CP 1242-7 V2, CP 1243-7 LTE, CP 1243-1, CP 1243-8 IRC

  • Entry
  • Associated product(s)
Firmware version 3.1 for the following S7-1200 communication modules is available for download:


Firmware version 3.1 for the following S7-1200 communication modules is available for download:

  • 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 addition, the following feature is available as from Firmware Version 3.1 for modules providing security functions (CP 1243-7, CP1243-1, CP1243-8):

  • Connection to SINEMA Remote Connect

With the optional connection to SINEMA Remote Connect *, remote maintenance access and Telecontrol applications can now benefit from the convenient and secure management platform of the SINEMA Remote Connect Server.


* Note regarding the recommended authentication method

The use of the CA certificate is the recommended authentication method. This is valid for ten

years. However, the finger print is derived from the server certificate. The duration of validity

may be significantly shorter.


STEP7 V15 must be used to configure the modules with FW 3.1.

The existing Firmware Version 3.0 continues to be used on TIA Portal to configure the module CP 1242-7 (6GK7242-7KX31-0XE0).
The SINEMA Remote Connect compatibility is not available on this module, since it is not a security module (no VPN and no Firewall).

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_CP124x7_99.pdf (7.6 MB) 

  OSS_CP1243-8_99.pdf (4.9 MB)

  OSS_CP1243-1_99.pdf (4.9 MB)


You can download the files  here.

 Registrierung notwendig  6GK7_242-7KX31-0XE0_V03.01.24_OSS.zip (21.3 MB) 

 Registrierung notwendig  6GK7_243-7SX30-0XE0_V03.01.24_OSS.zip (21.3 MB)

 Registrierung notwendig  6GK7_243-8RX30-0XE0_V03.01.24_OSS.zip (18.6 MB)

 Registrierung notwendig  6GK7243-1BX30-0XE0_V03.01.24_OSS.zip (18.6 MB)

 Registrierung notwendig  6GK7243-7KX30-0XE0_V03.01.24_OSS.zip (21.3 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 the CPU to the operating mode RUN.

Security information
In order to protect technical infrastructures, systems, machines and networks against cyber threats, it is necessary to implement – and continuously maintain – a holistic, state-of-the-art IT security concept. Siemens’ products and solutions constitute one element of such a concept. For more information about cyber security, please visit