Application download: EtherCAT master hangs sporadically in 'UNKNOWN' state after application download (corrected from V01.05.03)

Corrected from:

Servo-Inverter i950 FW: from V01.05.03.03.1867

Response of the new version:

The EtherCAT master is now no longer sporadically stuck in the 'Unknown' state.

What happens?

The EtherCAT master is sporadically stuck in the "Unknown" state.
No EtherCAT communication is established and all slaves remain in the Init state.

When does the behaviour occur?

Download of a new application to a device where an application with EtherCAT master is already active.
The frequency of occurrence is increased if it is a system with modular machine configuration.
If the project to be loaded is loaded as boot application after power on, the problem does not occur.

Which products are affected?

Servo Inverter i950 FW

Short-term measures / Evalution / Recommendations:

Create the project to be loaded as a boot project on the device and restart by switching to mains.

Automatic Translation

URL for linking this AKB article: https://www.lenze.com/en-de/go/akb/202100044/1/