Safety-related Project Modifications
This topic applies if a Safety PLC is included in your application. It relates to the safety-related part of the application (code, device parameters etc.).
The results delivered by the project comparison in PLCnext Engineer must not contribute (neither directly nor indirectly) to the executable code (including data) of the safety-related application system.
For a reliable detection of modified safety-related project parts, the results of the project comparison must only be used in combination with a manual comparison of the checksums (CRCs) calculated by PLCnext Engineer. CRCs are output in the 'Safety Information' editors of the 'Project' PLANT node (only available if a Safety PLC is included) and of each safety-related user POU (COMPONENTS). These CRCs are the only valid basis for reliably detecting safety-related project modifications. To support you in finding modification details in safety-related project parts with different CRCs, PLCnext Engineer provides the project comparison tool described here.
|
WARNING
|
Unintended machine operation
|
General procedure for a safety-related detection of project modifications
- Manually compareDiffering CRCs indicate that the respective project part has been modified.
- the CRCs listed in the 'Safety Information' editors of the 'Project' node (PLANT) and of each safety-related user POU (COMPONENTS)
- with the CRCs in the archived project documentation of the project to be compared.
Identical CRCs indicate that the respective project part has not been modified. - Based on the results of these CRC comparisons, you can use the project comparison tool as described in this topic for locating the project modification details.