CPU fault

What does 20 mean?

An internal CPU fault has occurred within the unit. This indicates a general internal processing error, which might be transient or indicate a more serious hardware issue.

• CPU communication error with other internal modules.
• Loss of synchronization between CPU cores.
• Bus arbitration failure within the CPU.
• Faulty interface to I/O or communication modules.
• Parameter P0005 (command source) related CPU error.

Click steps to track your progress.

1. 1

   Reset the fault by switching off the DC 24 V supply voltage.