Redundant System Extension Base Unit Unusable Module

What does 2128 mean?

This error indicates that an unusable module is mounted on an extension base unit within a redundant system (QnPRH with serial No. 09012 or later). This suggests an incompatibility or an incorrect module type for the specific redundant system configuration. The error is detected at power ON or during a reset, causing the CPU to stop.

• An incompatible or unusable module is physically installed on the extension base unit in a QnPRH redundant system.

Click steps to track your progress.

1. 1

   Physically remove the unusable module from the extension base unit.

2. 2

   Verify that all modules installed on the extension base unit are compatible and applicable for the QnPRH redundant system.