Siemens A1944 fault code meaning

Series: V90

PROFIdrive: Sign-of-life synchronization not achieved

servo drive

Meaning: Message category: Communication fault between the drive and the host controller (9) The bus is exchanging data, and isochronous synchronization is selected via the configuration telegram. However, synchronization with the master sign of life (STW2.12 ... STW2.15) cannot yet be performed because the sign of life changes at intervals that differ from the configured time frame Tmapc.

Possible causes

Source: SINAMICS V90 PROFINET, SIMOTICS S-1FL6 Operating Instructions P389