2.Flash Err

What does x250 mean?

An error occurred during access to the FLASH memory, indicating the PLC program attempted to access non-available or defective memory. This could signify a hardware issue with the FLASH memory module, preventing proper program execution or data storage.

• Degradation or physical damage to specific sectors of the controller's FLASH memory module, making them unreadable or unwritable.
• Power supply instability (e.g., `24VDC_Input_Voltage` fluctuating below 21V) or electrical noise during FLASH read/write operations, corrupting data.
• Firmware bug attempting to access an invalid memory address outside the allocated FLASH region, causing an access violation.
• Exceeded write endurance limits of a particular FLASH memory block, leading to wear-out failures over time.
• Electromagnetic interference (EMI) disrupting FLASH memory access during critical operations, causing read/write errors.

Click steps to track your progress.

1. 1

   1. Attempt to re-download the PLC program and all associated data (e.g., parameters, recipes) to the controller to overwrite potentially corrupted FLASH sectors.

2. 2

   2. Perform a comprehensive memory test or diagnostic routine on the controller's FLASH memory, if available through the engineering tool's diagnostics menu.

3. 3

   3. Verify the stability of the controller's power supply (e.g., `Power_Supply_Output_Voltage` measured at terminals `L+` and `M`) and check for transient voltage drops.

4. 4

   4. If the error persists after re-download and power verification, consider replacing the controller or the FLASH memory module (if it is a modular component).

5. 5

   5. Ensure proper grounding and shielding of the control cabinet and internal wiring to minimize EMI effects on sensitive memory components.