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Entry type: Product note Entry ID: 109756594, Entry date: 03/22/2018

Firmware update V2.1.5 for LOGO! CMR2020 (6GK7142-7BX00-0AX0) and LOGO! CMR2040 (6GK7142-7EX00-0AX0)

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The new firmware V2.1.5 for the LOGO! CMR2020 and LOGO! CMR2040 modules has been released and is now available for download free of charge.

Firmware version V2.1.5 is the successor to version V2.1.4 and contains important product improvements. Upgrading with a free firmware update is recommended.

The LOGO! CMR2020 and LOGO! CMR2040 with firmware V1.x or V2.x that are already in use can be updated via the Web Based Management (WBM).

The LOGO! CMR2020 (6GK7142-7BX00-0AX0) and LOGO! CMR2040 (6GK7142-7EX00-0AX0) modules  are  scheduled to be delivered with the new firmware V2.1.5 as soon as possible.

1. Product improvements

  • The highly sporadic behavior that resulted in the LOGO! CMR2040 not sending any text messages in a UMTS network now no longer occurs. 

  • The highly sporadic behavior of the LOGO! CMR2040 briefly not recognizing the SIM card now no longer occurs. 


2. Notes on installation/commissioning

  • The LOGO! CMR is configured via the WBM of the module.

    With factory settings, the IP address is or

    The initial logon data are:

    Login: admin

    Password: admin


  • If the "DynDNS" provider is enabled in V2.0.12, the following must be noted when updating firmware V2.0.12 to firmware V2.1.x with DynDNS enabled:

  1. DynDNS must be disabled in the WBM --- this change in the configuration causes the LOGO! CMR to freeze

  2. The LOGO! CMR must be restarted. After restarting, DynDNS is disabled.

  3. The firmware update V2.1.x can be installed and activated (see item below).

  4. After successfully updating, DynDNS can be activated in the WBM once again.

  • The firmware is updated via the WBM of the LOGO! CMR.

    Navigate to the "Maintenance" entry -  "Firmware" tab.  The firmware update can be loaded using the "Browse" button there.

    Note: It is not possible to downgrade the firmware to an older version.

    For more information, refer to the LOGO! CMR Manual


3. Notes on configuration


  • Configuration via the WBM of the module. All standard browsers can be used for the configuration. We recommend always using the most recent browser version. The LOGO! CMR is released with:

    • Internet Explorer versions 10 and 11

    • Microsoft Edge version 38.0

    • Mozilla Firefox version 47.0

    • Google Chrome version 54.0

    • Apple Safari V9


  • All configurations that were created with a previous firmware version can still be used with firmware V2.1.5. This means the saved configuration is updated to the new version when upgrading the firmware. Old settings are retained, and new functions are preset with default values. Configurations (*.cfg files) that were created with previous firmware versions can also be downloaded to a LOGO! CMR with firmware V2.1.5.


4. Notes on operation


  • In very rare cases an error may occur in the mobile wireless module of the module. If the CMR detects this state, it automatically initiates a restart. The outputs are de-energized for a brief period of time during this restart.


  • For remote access directly via the IP address per HTTPS (not via VPN tunnel) of the LOGO! CMR, browsers that permit communication via a single connection must be used. Mozilla Firefox is recommended.


  • Reconfiguration is not possible during the dial-in process into the mobile wireless and data network. A corresponding error message is displayed.


5. Hardware version


  • The LOGO! CMR has been delivered with the new hardware product version 2 since mid-December 2017.

6. License clearing:

Third-party software – license conditions and copyright information

You can find copyright information for the 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.

 Registrierung notwendig  LOGO_CMR_2_1_170908_ReadMe.html (668.1 KB) 

7. Download firmware update

The firmware update V2.1.5 for LOGO! CMR2020 (6GK7142-7BX00-0AX0) and LOGO! CMR2040 (6GK7142-7EX00-0AX0) is available for download via this link

 Download unterliegt Exportcontrolle  CMR1427BX00V215_OSS.zip (1.5 MB) 

Security information
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