Memory Corruption Detected

What does A395.11 mean?

This flag indicates that memory corruption has been detected within the PLC. When this flag goes ON, the 'Number of Power Interruptions' (A514) will be cleared. This suggests a significant issue with the integrity of the PLC's internal memory or stored data.

• Internal memory read/write errors within the CPU Unit.
• Corrupted program or parameter data due to unexpected events.
• Hardware malfunction affecting the CPU's memory modules.
• Unstable power supply leading to transient memory corruption.

Click steps to track your progress.

1. 1

   Perform a memory check using the CX-Programmer to diagnose the extent of the corruption.

2. 2

   Upload the existing program and parameters from the PLC, then download a known good backup to restore data integrity.

3. 3

   Verify the PLC's power supply stability, checking for voltage sags, transients, or complete interruptions.

4. 4

   If the issue persists after reloading software and verifying power, replace the CPU Unit.