ABB Drive Last Speed Issue with Fieldbus Option Module Application Note

This document describes an issue where an ABB drive fails to run at its last speed when the controller is switched to program mode, even when parameter 30.18 is set to "Last Speed." The solution involves programming the Control Supervisor Object (Class 0x29) in the fieldbus option module, specifically setting ID#14 (for RCNA-01 and RETA-01) or ID#20 (for RDNA-01) to either 1 (Ignore Idle) or 2 (Imitate communication fault function).