CPU Bus Unit Setting Error

What does A402.03 mean?

This fault indicates a setting error for a CPU Bus Unit. When an CPU Bus Unit Setting Error occurs, A402.03 and the bit in A427 corresponding to the Unit's unit number (0-F) are turned ON. The CPU Unit will continue operating, and the ERR/ALM indicator on the front of the CPU Unit will flash. These flags are refreshed when power is turned ON or I/O is recognized.

• Incorrect configuration parameters or settings for a CPU Bus Unit.
• Mismatched hardware or software settings for the CPU Bus Unit.

Click steps to track your progress.

1. 1

   Identify the specific CPU Bus Unit with the setting error by checking bits A427.00 to A427.15.

2. 2

   Compare the configured settings for the identified CPU Bus Unit in the CX-Programmer with the actual hardware.

3. 3

   Reconfigure the CPU Bus Unit settings to match the expected parameters.

4. 4

   Cycle power or re-recognize I/O to refresh the status after correcting settings.