PROFIBUS/PROFINET: Bus configuration changed (slave/device)

What does 380502 mean?

This alarm signals that the PROFIBUS/PROFINET bus configuration has changed, either due to initial commissioning or the recognition of a new slave/device on the bus. While not an error in itself, the new settings will only become active after a system restart. This requires a controlled restart to ensure the new configuration is properly loaded and the system operates as intended, avoiding potential communication inconsistencies.

• A new PROFIBUS slave or PROFINET device has been physically added to the network segment.
• The GSD/GSDML file or configuration parameters for an existing slave/device have been updated in the engineering software.
• Replacement of a PROFIBUS/PROFINET slave/device with a different model or firmware version requiring configuration adjustment.
• The engineering software has performed a topology scan and detected a variance from the last saved configuration.
• Memory card containing the project configuration was replaced or updated on the PLC, triggering a configuration change detection.

Click steps to track your progress.

1. 1

   1. Acknowledge the alarm in the PLC and verify if the reported configuration change corresponds to a planned modification or new device installation.

2. 2

   2. Upload the current hardware configuration from the PLC to the engineering software to compare it with the offline project.

3. 3

   3. If a new device was added, integrate its GSD/GSDML file and configure its parameters in the PLC project, then download the updated configuration.

4. 4

   4. If an existing device's configuration changed, update the relevant parameters in the engineering software (e.g., I/O addresses, module types).

5. 5

   5. Perform a 'Compare' function between the online and offline PLC project to identify the exact differences in the bus configuration.

6. 6

   6. Initiate a complete PLC warm restart (POWER ON/OFF) if a download of the modified configuration requires a full re-initialization of the bus.