Siemens Industry Online Support
Siemens AG
Entry type: Product note Entry ID: 109800267, Entry date: 08/23/2021

Sales and delivery release for firmware V2.2 for LOGO! CMR2020 (6GK7142-7BX00-0AX0) and LOGO! CMR2040 (6GK7142-7EX00-0AX0) including download

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The new firmware V2.2 for the LOGO! CMR2020 and LOGO! CMR2040 modules has been released and is now available for download free of charge.

1. Product description

LOGO! CMR2020/2040 in combination with the LOGO! logic module or in stand-alone operation is a cost-efficient remote communication system for monitoring and controlling distributed plants and systems via text message, email and phone call.


Firmware version V2.2 is the successor to version V2.1.8 and contains the following function extensions and corrections:

  • Monitoring and control via calls: Outgoing calls can be configured as actions for monitoring purposes. For simple control tasks, incoming calls can be linked in LOGO! CMR as signals that are optionally secured with PIN.
  • SNTP server: LOGO! CMR can be used on the LAN interface as an SNTP server for requesting clients.
  • VPN port sharing: Via the OpenVPN tunnel, configurable ports can be used to reach devices other than the LOGO! BM via the LOGO! CMR, e.g. SENTRON PAC2200 measuring device.
  • Number of users: The number of maximum users has been increased from 20 to 50.
  • Number of groups: The number of maximum groups has been increased from 10 to 25.
  • New placeholders for SMS and email texts: The placeholder [GPS.A] contains the age of the position, the placeholder [GPS.C] the current number of satellites.
  • HTTPS: The new option "Access only via HTTPS" is enabled by default from version V2.2. A redirect from HTTP to HTTPS takes place.
  • Multi-SMS: Improvement in handling multi-SMS when using SMS with placeholders.
  • Processing time LOGO! BM: The previously fixed value for the processing time of telegrams sent from the LOGO! CMR to the LOGO! BM can now be configured in the CMR web interface. This allows a LOGO! BM 8.3 to be monitored without sporadic load disconnections.
  • SMSC: The read-out SMSC of the SIM card is now displayed in the WBM under WAN/Overview.
  • LOGO! BM connection after restart: After restarting LOGO! CMR and already active monitoring of LOGO! BM 8.3, a one-time connection failure occurred. This behavior has been corrected.
  • Placeholder BM-DI: A correction was made here, so that now all signals that monitor a digital input of the BM can be sent as placeholders. Previously, not all digital inputs were replaced correctly.


In general, it is advised to always use the latest firmware version.

In older versions, after the release of a successor version, security and vulnerability monitoring and the correction of any errors are no longer carried out.


2. Ordering data 

Product name

Order number






3. Download Firmware V2.2

Please note the following before you start the update:

  • The LOGO! CMR with firmware V2.x that are already in use can be updated with a firmware update via the Web Based Management (WBM).
  • FW V2.2 is backward compatible and can also be operated with LOGO! BM devices < 8.3.
  • A downgrade from FW V2.2 to V2.0.x or V2.1.x is possible for modules with hardware product version 1.
  • A downgrade from FW V2.2 to V2.1.x is possible for modules with hardware product version 2.
  • A downgrade from version V2.x to V1.x is still not possible.
  • Compatibility with V2.0.x and V2.1.x config files is guaranteed. When upgrading the firmware, the stored configuration is adapted to the new version. Old settings are retained, and new functions are preset with default values. Configurations that were created with V2.0.x or V2.1.x can also be loaded to V2.2.
  • Configurations of the V1.x are no longer supported.


Third-party software – license conditions and copyright notes

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.


Download Readme OSS Registrierung notwendig  LOGO_CMR_2_2_210618_ReadMe.html (674.3 KB) 

You can download FW V2.2 here Registrierung notwendig  CMR1427BX00EX00_V2.2.9_OSS.zip (1.6 MB)(SHA-256)


4. Previous version 

29 Jan. 2021: Sales and delivery release for firmware V2.1.8 for LOGO! CMR2020 (6GK7142-7BX00-0AX0) and LOGO! CMR2040 (6GK7142-7EX00-0AX0) including download:  109792919  

7 Oct. 2019: Firmware update V2.1.7 for LOGO! CMR2020 (6GK7142-7BX00-0AX0) and LOGO! CMR2040 (6GK7142-7EX00-0AX0): 109772048 

Security information
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