Beckhoff CX-B930 Series, Руководство пользователя

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Error handling and diagnostics
CXxxxx-M930/B930 38 Version: 1.1
6.2 Box states
Directly below the PROFINET controller there are variables containing general information about the state of
the PROFINET communication.
Fig. 2: Diagnostic variables DevState, PnIoError and PnIoDiag in the TwinCAT tree view.
This data is exchanged between the PROFINET driver and the System Manager.
Table 3: DevState, PnIoError and PnIoDiag, description of the variables.
Variable Description
DevState The variable DevState contains information about the physical communication status of the
PROFINET controller, such as the link status or whether the sender resources are still
adequate.
PnIoError The Error variable shows possible problems when establishing a connection and counts
the PROFINET devices affected by an error.
PnIoDiag The diagnostic variable provides status information about an existing connection. The
variable counts the PROFINET device affected by a warning or diagnostics.
The ‘DevCtrl’ output variable currently has no function.