UM Overflow Error

What does A295.15 mean?

This flag indicates a User Memory (UM) Overflow Error. This error typically occurs when the program attempts to utilize more user memory than is currently available or allocated within the CPU unit. This can lead to system instability.

• Program size exceeds the maximum available user memory.
• Dynamic memory allocation requesting more space than is free.
• Memory leak within custom function blocks or complex program routines.

Click steps to track your progress.

1. 1

   Optimize program code and data structures to reduce overall user memory consumption.

2. 2

   Verify memory allocation settings in the PLC configuration and increase UM size if applicable.

3. 3

   Analyze program sections with extensive data usage or recursive calls for memory efficiency.