Operation Finished

What does 8448 mean?

An operation involving the Safety PLC has concluded, but it requires further action related to its switch address settings or the presence of an SD-Card in the non-safety PLC. This is a state indicating the PLC is not fully ready for safe operation until these parameters are correctly addressed and reset. Ignoring this can lead to incorrect PLC state or functionality.

• The safety PLC's physical switch address (e.g., DIP switches) does not match the configured address in the engineering project after a download or change.
• An SD card is required in the standard (non-safety) PLC for specific operations (e.g., firmware update, storing recipe data) that impact the overall system state.
• The safety PLC is awaiting confirmation of a change from the user, indicated by a physical acknowledge button press or a software command.
• The safety program has finished loading but requires a memory reset or specific boot sequence to fully initialize, often linked to the SD card for boot-up projects.

Click steps to track your progress.

1. 1

   Verify the physical DIP switch settings or rotary switch address on the safety PLC module matches the configured address in the engineering software (e.g., TIA Portal device configuration).

2. 2

   Check if an SD card is present in the standard (non-safety) PLC CPU, and if its content is valid and required for the current operation (e.g., boot project, firmware update).

3. 3

   If a switch address was changed, perform a power cycle of the safety PLC after setting the correct address.

4. 4

   Check the safety PLC's front panel for an "ACK" or "Confirm" button and press it if illuminated, or issue a corresponding acknowledge command from the engineering software.

5. 5

   Ensure the SD card in the standard PLC contains the correct boot project or firmware image if the operation relates to a system update or initial startup.

6. 6

   Execute a full download of the safety project to the safety PLC, ensuring all address settings are correctly transferred.