The PROFINET Controller is equipped with an internal buffer for diagnostic data. This "shadowing
database" is constantly updated in the background (transparent for the user) by alarms
sent from the devices and by acyclic services for establishing the connection. In
this way, with a minimum delay the actual diagnosis status of all devices is mirrored
in the host application and can be evaluated there at any time. Alternatively or additionally,
the application can receive the individual alarms (CommFB.RALARM) or re-read the diagnosis data (CommFB.RDREC).
-
See also: ⮫ IoDrvProfinet.ProfinetController
-
Device Function Block
-
Provider and Consumer Status
-
Alarms
-
Device and Submodule Status
-
Diagnosis Buffer (Diagnosis Shadowing)