CPU Unit Down Error (Built-in I/O)

What does 1040 mean?

The CPU module, specifically its built-in I/O, has experienced a runaway condition or failure. This can be caused by electrical noise interference or a fundamental hardware fault within the CPU module. The condition indicates that the CPU is not operating correctly.

• Runaway or failure of CPU module (built-in I/O).
• Malfunctioning due to noise or other external reasons.
• Hardware fault within the CPU module.

Click steps to track your progress.

1. 1

   Implement noise reduction measures for the control system environment.

2. 2

   Reset the CPU module and attempt to RUN it again.

3. 3

   If the same error is displayed again after resetting, diagnose for a CPU module hardware fault.