Checking project data integrity 

Libraries and projects in PLCnext Engineer are hashed. The hashes assigned with PLCnext Engineer are checked by PLCnext Control. This way you can verify that data is not modified, tampered with, or corrupted.  

When creating the project in PLCnext Engineer, a manifest file with hashes is generated. Before the project is loaded on the PLCnext Control, it is checked whether this project has integrity. This integrity check writes a notification. 

After downloading a project to the PLCnext Control you have to make sure that the integrity check of the project data was successful. To do this, you need to check the notifications. Proceed as follows:

  • Log in to the WBM. 

Return to topicHow do I get to the WBM again? Click here for more information... 

Establishing a connection to the Web-based Management (WBM):

  • Open a web browser on your computer.
  • In the address field, enter the URL https://<IP-address-of-the-controller>/wbm,
    for example:

For further information, see WBM.


  • Open the Notifications page (DiagnosticsNotifications). 
  • Check if you can see a notification stating that the integrity check was successful for your project. See the example screenshot below.

Further steps of the check follow, which you must check for completeness:

  • The project is loaded onto the controller.
  • The project name of the project is displayed. Check if the project name matches the project you wanted to load on the controller.
  • PLCnext Control started. 


The project data integrity check detects various errors and displays them in the notifications. The following entries are possible: 

  • "Manifest file does not exist"
  • "Hash algorithm not supported"
  • "Hash value of the file is not correct"
  • "File does not belong to the project"
  • "File does not exist"


All devices have the same default configuration, which depends on the security profile:

  • With activated security profile: Error
    PLCnext Control does not go to the RUN status, but to the FAIL status (Ready (error)). 
     For more information about the status, see the corresponding documentation, e. g. User manual AXC F 2152.
  • Without activated security profile: Warning
    A warning is displayed, but PLCnext Control starts and the program runs.





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• Published/reviewed: 2023-11-02 • Revision 011 •