Cause : Acknowledgement delay when accessing the memory - A memory area was accessed that does not return a "READY". An "Acknowledgement Delay" when accessing memory in Siemens S120 drives typically indicates a communication issue between the drive and the controller or programming device. This delay can occur for various reasons, including network congestion, communication protocol mismatches, or hardware malfunctions.

- carry out a POWER ON (power off/on) for all components.