State Variable Bit 15
Acyclic K-bus Function Active (TwinCAT)
Beckhoff · CX2100-0914 Embedded PC
What does State Variable Bit 15 mean?
The K-bus State variable in TwinCAT has Bit 15 set, indicating that an acyclic K-bus function, such as a K-bus reset, is currently active. While not always an error, it signifies that synchronous K-bus operation might be temporarily interrupted.
Source: Beckhoff CX2100-0914 Embedded PC
Open Manual (Page 81)