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Entry type: Product note Entry ID: 109748227, Entry date: 06/14/2017
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Download for firmware update V1.4.1 of the CP 443-1 RNA (6GK7443-1RX00-0XE0)

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The firmware V1.4.1 is now available for download free of charge.

The new firmware V1.4.1 is released for the SIMATIC NET product CP 443-1 RNA (6GK7443-1RX00-0XE0).

Effective immediately, the module CP 443-1 RNA (6GK7443-1RX00-0XE0) will be delivered with the new firmware V1.4.1.

The firmware V1.4.1 is the successor of firmware V1.3.1 and contains product improvements. Performing an upgrade using a free firmware update is generally expedient and is recommended.

CP 443-1 RNA with firmware versions V1.0 or higher that are already in use can be upgraded by means of a firmware update.


1. Security information
This update contains safety-relevant changes which improve the resistance to potential attack scenarios. We therefore recommend you update the firmware.


2. Product enhancements

  • Highly sporadic packet losses at the PRP interface has been remedied.
  • ARP requests for configured connections have been optimized.


3. Note on Operation 

You must observe the following when updating a module with hardware version 1 and  firmware version < V1.4.1:

NOTICE! Because a hardware block is updated in the background by the newly downloaded firmware, the CP must not be switched off immediately after downloading the firmware.

The firmware update must be made via interface X2. This must first be activated in the configuration. The loading of the firmware must be started when the CP is in RUN !

The update process is indicated by a permanent illumination of the MAINT LED.

After completing the update, the CP automatically restarts. The MAINT LED will stop lighting.
Only then can the supply voltage be switched off or the CP pulled.
Upgrading can take up to 4 minutes!


4. Configuration

  • As of SIMATIC STEP7 V5.5 SP3, the module has been integrated in STEP 7.

  • Note: The module cannot be configured in STEP 7 Professional (TIA Portal).


5. Released CPU:

The CP is released for operation on

  • SIMATIC S7-CPUs, firmware version V5.3.2 or higher
  • SIMATIC S7 H-CPUs (high-availability system), firmware version V4.5.6 or higher

6. Additional information on the CP 443-1 RNA

See delivery release under entry ID 72300487


7. License Clearing:

Third-party software - license conditions and copyright notes

You can find the copyright notes on the third-party software, especially Open Source Software, as well as applicable license conditions for this type of third-party software in the file ReadMe_OSS.

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.
Registrierung notwendig CP44x-1_RNA_1_4_170330_ReadMe.html (598.3 KB)


8. Download firmware update

The FW update V1.4.1 for CP 443-1 RNA (6GK7443-1RX00-0XE0) is available for download via this link.

Registrierung notwendig 6GK744x-1RX00-0XE0_V1_4_1.zip (4.4 MB)




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
https://www.siemens.com/cybersecurity#Ouraspiration.